hcd-gt22_gt44_gt55 sony genezi.pdf
TRANSCRIPT
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SERVICE MANUAL
COMPACT DISC DECK RECEIVER
SPECIFICATIONS
HCD-GT22/GT44/GT55
Photo: HCD-GT55
Ver. 1.0 2007.06
Continued on next page
9-887-722-012007F05-1 2007.06
Sony CorporationPersonal Audio DivisionPublished by Sony Techno Create Corporation
E ModelHCD-GT22/GT44/GT55
Australian ModelHCD-GT22/GT44
HCD-GT22 is the amplifier, USB, CD player, tapedeck and tuner section in MHC-GT22.
HCD-GT44 is the amplifier, USB, CD player, tapedeck and tuner section in MHC-GT44.
HCD-GT55 is the amplifier, USB, CD player, tapedeck and tuner section in MHC-GT55.
Model Name Using Similar Mechanism NEWCD CD Mechanism Type CDM74KF-K6BD91UR-WODSection Base Unit Name BU-K6BD91UR-WOD74
Optical Pick-up Block Name KSM-213DCPTAPE Model Name Using Similar Mechanism NEWSection Tape Transport Mechanism Type CWN42FF609
Amplier sectionHCD-GT55The following are measured at AC 120, 127, 220, 240V 50/60HzFront speaker
Power output (rated): 110 W + 110 W (at 6 , 1 kHz, 1% THD)RMS output power (reference): 200 W + 200 W (per channel at 6 , 1 kHz, 10% THD)
SubwooferRMS output power (reference): 190 W(at 6 , 80 Hz, 10% THD)
HCD-GT44The following are measured at AC 120, 127, 220, 240V 50/60HzFront speaker
Power output (rated): 90 W + 90 W (at 6 , 1 kHz, 1% THD)RMS output power (reference): 150 W + 150 W (per channel at 6 , 1 kHz, 10% THD)
SubwooferRMS output power (reference): 150 W (at 6 , 80 Hz, 10% THD)
HCD-GT22The following are measured at AC 120, 127, 220, 240V 50/60Hz
Power output (rated): 110 W + 110 W (at 6 , 1 kHz, 1% THD)RMS output power (reference): 200 W + 200 W (per channel at 6 , 1 kHz, 10% THD)
InputsAUDIO (phono jack): voltage 250 mV, impedance 47 kilohmsMIC (phone jack): sensitivity 1 mV, impedance 10 kilohms
(USB) port: Type A
OutputsPHONES (stereo mini jack): accepts headphones of 8 or moreSPEAKER: accepts impedance of 6 to 16 SUB WOOFER OUT (HCD-GT55/GT44 only): accepts impedance of 6 to 16
USB sectionSupported bit rate
MP3 (MPEG 1 Audio Layer-3): 32 320 kbps, VBR
Sampling frequenciesMP3 (MPEG 1 Audio Layer-3): 32/44.1/48 kHz
Transfer speedFull-Speed
Supported USB deviceMass Storage Class
Maximum current500 mA
CD player sectionSystem: Compact disc and digital audio systemLaser: Semiconductor laser (=770 810 nm)Emission duration: continuousFrequency response: 20 Hz 20 kHzSignal-to-noise ratio: More than 90 dBDynamic range: More than 88 dB
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2HCD-GT22/GT44/GT55
Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C
during repairing. Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times). Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardous radiationexposure.
SAFETY-RELATED COMPONENT WARNING!!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.
is classified as a CLASS 1 LASER product. This marking is located on the rear exterior.
This appliance
Tape deck sectionRecording system: 4-track 2-channel, stereoFrequency response: 50 13,000 Hz (3 dB), using Sony TYPE I cassettes
Tuner sectionFM stereo, FM/AM superheterodyne tuner
FM tuner section:Tuning range:
87.5 108.0 MHz (50 kHz step)Antenna: FM lead antennaAntenna terminals: 75 ohms unbalancedIntermediate frequency: 10.7 MHzAM tuner section:Tuning range
Latin American and Oceanian models:530 1,710 kHz (with 10 kHz tuning interval)531 1,710 kHz (with 9 kHz tuning interval)
Other models:530 1,610 kHz (with 10 kHz tuning interval)531 1,602 kHz (with 9 kHz tuning interval)
Antenna: AM loop antenna, external antenna terminalIntermediate frequency: 450 kHz
GeneralPower requirements
Oceanian model: AC 230 240 V, 50/60 HzMexican model: AC 127 V, 60 HzArgentine model: AC 220 V, 50/60 HzOther models: AC 120, 220 or 230 240 V, 50/60 Hz, Adjustable with voltage selector
Power consumptionHCD-GT55: 225 WHCD-GT44: 250 WHCD-GT22: 150 W
Dimensions (w/h/d) (excl. speakers)HCD-GT55:Approx. 280 365 425 mmHCD-GT44/GT22:Approx. 280 325 425 mm
Mass (excl. speakers)HCD-GT55: 10.5 kgHCD-GT44/GT22: 10.0 kg
Design and specifications are subject to change without notice.
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3HCD-GT22/GT44/GT55
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 6
3. DISASSEMBLY3-1. Disassembly Flow ........................................................... 73-2. Case (Side-L), Case (Side-R) .......................................... 83-3. Case (Top) ....................................................................... 83-4. Lid (CD) .......................................................................... 93-5 CD Mechanism Deck
(CDM74KF-K6BD91UR-WOD), USB board ................ 93-6. Front Panel Block ............................................................ 103-7. Mecha Deck (CWN42FF609) ......................................... 103-8. Back Panel Block ............................................................ 113-9. MAIN Board .................................................................... 113-10. CD Board ......................................................................... 123-11. DRIVER Board, SW Board ............................................. 123-12. Optical Pick-up Block (KSM-213D) ............................... 133-13. SENSOR Board ............................................................... 133-14. MOTOR (TB) Board ....................................................... 143-15. MOTOR (LD) Board ....................................................... 14
4. TEST MODE .............................................................. 15
5. MECHANICAL ADJUSTMENTS ....................... 19
6. ELECTRICAL ADJUSTMENTS ......................... 20
7. DIAGRAMS7-1. Block Diagram CD SERVO, USB Section ............... 237-2. Block Diagram MAIN Section .................................. 247-3. Block Diagram AMP Section .................................... 257-4. Block Diagram PANEL, POWER AMP Section ....... 267-5. Printed Wiring Board CD Board ............................... 287-6. Schematic Diagram CD Board .................................. 297-7. Printed Wiring Boards CHANGER Section .............. 307-8. Schematic Diagram CHANGER Section .................. 317-9. Printed Wiring Board USB Board ............................. 327-10. Schematic Diagram USB Board ................................ 337-11. Printed Wiring Board TC Board ................................ 347-12. Schematic Diagram TC Board .................................. 357-13. Printed Wiring Boards MAIN Section ...................... 377-14. Schematic Diagram MAIN Section (1/4) .................. 387-15. Schematic Diagram MAIN Section (2/4) .................. 397-16. Schematic Diagram MAIN Section (3/4) .................. 407-17. Schematic Diagram MAIN Section (4/4) .................. 417-18. Printed Wiring Board MIC Board ............................. 427-19. Schematic Diagram MIC Board ................................ 437-20. Printed Wiring Board
AMP Board (GT22/GT55) ........................................ 447-21. Schematic Diagram AMP Board (GT22/GT55) ........ 457-22. Printed Wiring Board AMP Board (GT44) ............... 467-23. Schematic Diagram AMP Board (GT44) .................. 47
7-24. Printed Wiring Boards SUB WOOFER Section (GT44/GT55) ..................... 48
7-25. Schematic Diagram SUB WOOFER Section (GT44/GT55) ..................... 49
7-26. Printed Wiring Boards PANEL Section ..................... 507-27. Schematic Diagram PANEL Section ......................... 517-28. Printed Wiring Boards KEY Section ......................... 527-29. Schematic Diagram KEY Section ............................. 537-30. Printed Wiring Board
TRANS Board (GT22/GT55) .................................... 547-31. Schematic Diagram
TRANS Board (GT22/GT55) .................................... 557-32. Printed Wiring Board TRANS Board (GT44) ........... 567-34. Schematic Diagram TRANS Board (GT44) ............. 57
8. EXPLODED VIEWS8-1. Case Section .................................................................... 698-2. KEY TOP Board Section ................................................. 708-3. TC Mecha Deck Section .................................................. 718-4. PANEL Board Section ..................................................... 728-5. Front Panel Section ......................................................... 738-6. MAIN Board Section ....................................................... 748-7. POWER Board, SUB WOOFER Board Section ............. 758-8. Chassis Section ................................................................ 768-9. CD Mechanism Deck Section-1
(CDM74KF-K6BD91UR-WOD) .................................... 778-10. CD Mechanism Deck Section-2
(CDM74KF-K6BD91UR-WOD) .................................... 78
9. ELECTRICAL PARTS LIST ................................ 79
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4HCD-GT22/GT44/GT55
MODEL IDENTIFICATION Model Number Label
Model Power voltage indicationGT22: E2, E3, E51 AC: 120V/220V/230-240V - 50/60Hz 150WGT22: E13, AUS AC: 230-240V - 50/60Hz 150WGT22: MX ca-127V 60Hz 150WGT22: AR ca 220V - 50/60Hz 150WGT44: E13, AUS AC: 230-240V - 50/60Hz 250WGT44: E2, E3, E51 AC: 120V/220V/230-240V - 50/60Hz 250WGT44: MX ca-127V 60Hz 250WGT44: AR ca 220V - 50/60Hz 250WGT55: E2, E51 AC: 120V/220V/230-240V - 50/60Hz 225WGT55: MX ca-127V 60Hz 225WGT55: AR ca 220V - 50/60Hz 225W
AbbreviationAR : Argentina modelAUS : Australian modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE13 : 220V - 230V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model
SECTION 1SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostaticbreak-down because of the potential difference generated by thecharged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.
NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focused onthe disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission,observe from more than 30 cm away from the objective lens.
UNLEADED SOLDERBoards requiring use of unleaded solder are printed with the lead-free mark (LF) indicating the solder contains no lead.(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARKUnleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40 C higher
than ordinary solder.Ordinary soldering irons can be used but the iron tip has to beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set toabout 350 C.Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful! Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)than ordinary solder so use caution not to let solder bridgesoccur such as on IC pins, etc.
Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder mayalso be added to ordinary solder.
RELEASING THE ANTITHEFT LOCKThe disc table lock function for the antitheft of an demonstrationdisc in the store is equipped.
Releasing Procedure :1. Press the I/1 button to turn the power on.2. Press the CD button to select CD.3. While pressing the x button, press the Z button until
UNLOCKED displayed on the fluorescent indicator tube(around 5 seconds).
Note: When LOCKED is displayed, the antitheft lock is not released byturning power on/off with the I/1 button.
Power VoltageIndication
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5HCD-GT22/GT44/GT55
SERVICE POSITIONIn checking the CD mechanism deck, prepare jig (extension cable J-2501-248-A (27 core/300 mm))/J-2501-077-A (13 core/300 mm)
Connect jig (extension cable J-2501-248-A)to the flexible flat cable (27 core) and CD board (CN202).
MAIN board
CD mechanism deck
Connect jig (extension cable J-2501-077-A)to the flexible flat cable (13 core) and DRIVER board (CN701).
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF
1 Turn the gear (loading A)to the direction of the arrow.
2
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6HCD-GT22/GT44/GT55SECTION 2GENERAL
This section is extracted frominstruction manual.
UnitHCD-GT55
HCD-GT44/GT22
* HCD-GT44 only
Remote
1
4/1 (on/standby)Press to turn on the system.
Unit: STANDBY indicatorLights up when the system is off.
2
Remote sensor3
DISPLAYPress to change the information on the display.
Unit: ILLUMINATIONPress to change the illumination pattern around MASTER VOLUME qg.
4
CDPress to select the CD function.
TUNER/BANDPress to select the TUNER function. Press to select FM or AM reception mode.
Unit: TAPE A/BPress to select the TAPE function. Press to select TAPE A or TAPE B.
Unit: AUDIOPress to select the AUDIO function.
USBPress to select the USB function.
Remote: FUNCTIONPress to select the function.
5 (HCD-GT55/GT44 only)SUBWOOFERPress to turn on and off the subwoofer.
SUBWOOFER indicatorLights up when the subwoofer is on.
6
Z PUSHPress to insert or eject a tape.7
ERASEPress to erase MP3 files and folders from the connected optional USB device (Digital music player or USB storage media).
8
Unit: PRESET EQ, GROOVE, SURROUNDRemote: EQPress to select the sound effect.
9
PLAY MODE/TUNING MODE (HCD-GT55 only)Press to select the play mode of a CD, MP3 disc or an optional USB device (Digital music player or USB storage media).Press to select the tuning mode.
EQ BAND (HCD-GT44/GT22 only) Press to select the frequency band.
q;
PHONES jackConnect the headphones.
qa
AUDIO INPUT L/R jacksConnect to an audio component (Portable audio player, etc.).
qs
(USB) port Connect an optional USB device (Digital music player or USB storage media).qd
REC/ERASE indicatorLights up when recording to the connected optional USB device (Digital music player or USB storage media), or when erasing MP3 files or folders.
qf
MIC jackConnect an optional microphone.
MIC LEVELTurn to adjust the microphone volume.
qg
Unit: MASTER VOLUMETurn to adjust the volume.Remote: VOLUME +/Press to adjust the volume.qh
OPERATION DIALTurn to select a track, file or folder.
qj
Unit: NX (play/pause)Remote: N (play)X (pause)Press to start or pause playback.
x (stop)Press to stop playback.
./> (go back/go forward) Press to select a track or file.
Unit: TUNING +/Remote: +/ (tuning)Press to tune in the desired station.
+/ (select folder)Press to select a folder.
m/M (rewind/fast forward) Press to find a point in a track or file.
qk
CD-USB SYNC/REC1Press to record from a disc onto the connected optional USB device (Digital music player or USB storage media).
CD-TAPE SYNCTAPE REC PAUSE/STARTPress to record onto a tape.
ql
Z OPEN/CLOSEPress to insert and eject a disc.
w;
Unit: DISC 1 3Press to select a disc. Press to switch to the CD function from other function.
Unit: DISC SKIP/EX-CHANGE Press to select a disc. Press to exchange a disc while playing.
Remote: DISC SKIPPress to select a disc.
wa
RETURNPress to return to the parent folder.Press to exit search mode.
ws
ENTERPress to enter the settings.
wd (HCD-GT55 only)
ENTERPress to enter the settings.
+/ (equalizer level)Press to adjust the equalizer level.
wf (HCD-GT55 only)BASSPress to select low frequency. The indicator lights up when the button is pressed.
VOCALPress to select mid frequency. The indicator lights up when the button is pressed.
GUITARPress to select high frequency. The indicator lights up when the button is pressed.
FOCUSPress to emphasize equalizer level of the selected band.
wg
CLOCK/TIMER SELECTCLOCK/TIMER SETPress to set the clock and the timers.
wh
REPEAT/FM MODEPress to listen to a disc, an USB device, a single track or file repeatedly.Press to select the FM reception mode (monaural or stereo).
wj
Battery compartment lidwk
CLEARPress to delete a pre-programmed track or file.
wl
TUNER MEMORYPress to preset the radio station.
e;
PLAY MODE/TUNING MODE Press to select the play mode of a CD, MP3 disc or an optional USB device (Digital music player or USB storage media).Press to select the tuning mode.
ea
SLEEPPress to set the Sleep Timer.
Location of Controls
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HCD-GT22/GT44/GT55
7
This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3DISASSEMBLY
SET
3-2. CASE (SIDE-L), CASE (SIDE-R)(Page 8)
3-3. CASE (TOP)(Page 8)
3-4. LID (CD)(Page 9)
3-9. MAIN BOARD(Page 11)
3-14. MOTOR (TB) BOARD(Page 14)
3-15. MOTOR (LD) BOARD(Page 14)
3-11. DRIVER BOARD, SW BOARD(Page 12)
3-6. FRONT PANEL BLOCK(Page 10)
3-7. MECHANICAL DECK(CWM42FF609)(Page 10)
3-5. CD MECHANISM DECK(CDM74KF-K6BD91UR-WOD)(Page 9)
3-10. CD BOARD(Page 12)
3-12. OPTICAL PICK-UP BLOCK(KSM-213D)(Page 13)
3-13. SENSOR BOARD(Page 13)
3-8. BACK PANEL BLOCK(Page 11)
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HCD-GT22/GT44/GT55
8
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (SIDE-L), CASE (SIDE-R)
4 three screws(case 3 TP2)
1 three screws(case 3 TP2)
5 two screws(BVTP3 10)
2 two screws(BVTP3 10)
3 case (side-L)
6 case (side-R)
3-3. CASE (TOP)
1 two screws(BVTP3 10)3
2 Open the case (top).
2 Open the case (top).
2 Open the case (top).
5 case (top)
4 four claws
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HCD-GT22/GT44/GT55
9
3-4. LID (CD)
3-5. CD MECHANISM DECK (CDM74KF-K6BD91UR-WOD), USB BOARD
1 Turn the gear (loading A)to the direction of the arrow.
3 four claws
2
4 lid (CD)
7 three screws(BVTP3 8)
6 screw (BVTP3 8)
6 screw(BVTP3 8)
8 CD mechanism deck(CDM74KF-K6BD91UR-WOD)
1 flexible flat (13 core) cable(CN701)
2 flexible flat (27 core) cable(CN302)
4 connector (CN901)
3 flexible flat (21 core) cable(MAIN board: CN301/USB board: CN907)
5 connector (CN903)
9 two screws (M2.6)0 USB board
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HCD-GT22/GT44/GT55
10
3-6. FRONT PANEL BLOCK
3-7. MECHA DECK (CWN42FF609)
5 four screws(BVTP3 8)
6 front panel block
1 flexible flat cable (27 core)(CN901)
4 two connectors(CN301, CN302)
3 flexible flat cable (13 core)(CN061)
2 flexible flat cable (11 core)(CN201)
1 six screws(BVTP2.6 8)
2
3 mecha deck(CWN42FF609)
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HCD-GT22/GT44/GT55
11
3-8. BACK PANEL BLOCK
3-9. MAIN BOARD
4 two screws(BVTP3 10)
4 two screws(BVTP3 10)(GT44/GT55)
4 two screws(BVTP3 10)
5 back panel block
2 connector(CN041)
1 flexible flat cable (9 core) (tuner (FM/AM))3 connector
(CN701)(except Australian model)
5 screw(BVTP3 8)
7 screw(BV3)
9
6 screw(BVTP3 8)
8 two screws(BVTT4 8)
3 connector(CN907)
1 flexible flat cable (11 core)(CN008)
0 connector(CN031)
4 connector(CN271)
qa MAIN board
qs POWER board
2 connector(CN903)
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HCD-GT22/GT44/GT55
12
3-10. CD BOARD
6 CD board
5 Remove soldering from the four points.4 flexible flat (16 core) cable
(CN301)
CD machanism deck(bottom side)
1 screw(BVTP3 8) 2 screw(BVTP2.6)
3 cover (OP)
3-11. DRIVER BOARD, SW BOARD
3 connector(CN703)
4 connector(CN704)
5 DRIVER board
7 SW board
2 wire (flat type) (5 core)(CN702)
1 two screws(BTTP (M2.6))
6 screw(BTTP (M2.6))
CD machanism deck(bottom side)
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HCD-GT22/GT44/GT55
13
3-12. OPTICAL PICK-UP BLOCK (KSM-213D)
3-13. SENSOR BOARD
4 two coil springs (insulator)
7 two coil springs (insulator)
5 two insulators
8 two insulators
6 two floating screws(PTPWH M2.6)
2 holder (213) assy
0 Remove the four solders of motor.
qa flexible flat cable (16 core)(CN301)
qs CD board
qd optical pick-up block(KSM-213D)
1 floating screw (PTPWH M2.6)
3 two floating screws(PTPWH M2.6)
9
2 tray
3 belt (table)
5 pulley (table)
8 screw(BTTP (M2.6))
0 SENSOR board
7 gear (geneva)
9 connector(CN731)
1 floating screw (PTPWH M2.6)
6 floating screw (PTPWH M2.6)
4 floating screw (PTPWH M2.6)
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HCD-GT22/GT44/GT55
14
3-14. MOTOR (TB) BOARD
3-15. MOTOR (LD) BOARD
6 Remove the two solderings of motor.
8 MOTOR (TB) board
7 table motor assy (M741)
5 two screws(BTTP (M2.6))
4
3 wire (flat type) (5 core) (CN742)
1 stopper
2 stopper
3 Remove the two solderings of motor.
5 MOTOR (LD) board
1 belt (loading)
4 loading motor assy (M751)
2 two screws(BTTP (M2.6))
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15
HCD-GT22/GT44/GT55
AMP TEST MODEThis mode is used to display the parameter of amplifier IC anddisplay the VACS status.Procedure:
1. Press the I/1 button to turn the power on.2. Press three buttons of x , u and [USB] simultaneously.3. When the AMP test mode is activated, the message AMP
TEST IN is displayed on the fluorescent indicator tubemomentarily, then amplifier adjustment mode is displayed onthe fluorescent indicator tube.
4. Press the [TAPE REC PAUSE/START] button to changed overbetween VACS status display mode and the amplifier ICparameter display mode.
5. In this mode, press the [GROOVE] button to changed overDBFB on/off, and DBFB ON or DBFB OFF is displayedon the fluorescent indicator tube.
6. In this mode, press the [SURROUND] button to changed oversurround on/off, and SURROUND ON or SURROUNDOFF is displayed on the fluorescent indicator tube.
For GT22/GT44 7. In this mode, press the [EQ BAND] button to enter the equalizer
adjustment mode.In the equalizer adjustment mode, press the [EQ BAND] buttonto change over the adjustment band as LOW/MID/HIGH. Andturn the [OPERATION DIAL] knob to adjust the equalizer levelof each bands.
For GT55 7. In this mode, press the [BASS], [VOCAL] or [GUITAR] button
to enter the parametric equalizer adjustment mode.In the parametric equalizer adjustment mode, press the [BASS],[VOCAL] and [GUITAR] button to change over the adjustmentband. And press the [BASS], [VOCAL] or [GUITAR] button tochange over the equalizer frequency of each bands, or pressthe [+] and [--] buttons to adjust the equalizer level of eachbands.
8. To release the amplifier IC parameter display mode or equalizeradjustment mode, press the I/1 button to the power off.
MC TEST MODEThis mode is used to check operations of microprocessor.Procedure:
1. Press the I/1 button to turn the power on.2. Press three buttons of x , u and [AUDIO] simultaneously.3. When the MC test mode is activated, VACS level is displayed
on the fluorescent indicator tube momentarily.4. Press the [TUNING +] button, the message ALL EQ MAX
is displayed on the fluorescent indicator tube momentarilyand press the [TUNING --] button, the message ALL EQ MINis displayed on the fluorescent indicator tube momentarily.
5. Press the [ENTER] button, the message ALL EQ FLAT isdisplayed on the fluorescent indicator tube momentarily.
6. Turn the [VOLUME] knob clockwise, the message VOLUMEMAX is displayed on the fluorescent indicator tubemomentarily and turn the [VOLUME] knob counterclockwise,the message VOLUME MIN is displayed on the fluorescentindicator tube momentarily.
7. Press the [TAPE REC PAUSE/START] button to changed overVACS on/off.
8. Press the I/1 button to release from this mode, then cold resetis performed.
SECTION 4TEST MODE
COLD RESETThe cold reset clears all data including preset data stored in theRAM to initial conditions. Execute this mode when returning theset to the customer.Procedure:
1. Press three buttons of x , u and [GROOVE] simultaneously.2. The message COLD RESET is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
TUNING STEP CHANGE-OVERA step of AM tuning interval can be changed over between 9 kHzand 10 kHz.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [TUNER/BAND] button to select AM.3. Press the I/1 button to turn the power off.4. Press two buttons of [TUNING +] and I/1 simultaneously.5. The message AM 9K STEP or AM 10K STEP is displayed
on the fluorescent indicator tube, and thus the tuning intervalis changed over.
CD SHIP (LOCK) MODEThis mode moves the optical pick-up to the position durable tovibration. Use this mode when returning the set to the customerafter repair.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press two buttons of u and I/1 simultaneously.4. The message LOCK is displayed on the fluorescent indicator
tube, and the CD ship mode is set.
CD SHIP (LOCK) MODE & COLD RESETThis mode is used to perform CD ship (lock) mode and cold resetsimultaneously.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [ILLUMINATION] and I/1
simultaneously.4. The message COLD RESET is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
ANTITHEFT LOCK MODEThis mode is used to unable to take sample disc out of disc table inthe shop.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Insert a disc.4. Press two buttons of x and Z for 5 seconds.5. The message LOCKED is displayed on the fluorescent
indicator tube and the disc table is locked. (Even if pressingthe Z button, the message LOCKED is displayed on thefluorescent indicator tube and the disc table is locked)
6. To release this mode, press two buttons of x and Z for 5seconds.
7. The message UNLOCKED is displayed on the fluorescentindicator tube and the disc table is unlocked.
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16
HCD-GT22/GT44/GT55
VERSION DISPLAY MODEThis mode is used to check the model, destination and softwareversion.Procedure:
1. Press the I/1 button to turn the power on.2. Press three buttons of x , u and [ILLUMINATION] simulta-
neously.3. When this mode is activated, model type and destination (*1)
are displayed on the fluorescent indicator tube.*1) GRL2H : HCD-GT22
GRL2HS : HCD-GT44GRL3HS : HCD-GT55
Example: GRL3HS_LATIN: Latin American models of HCD-GT554. Press the [TAPE REC PAUSE/START] button to display the soft-
ware version (*2) and year, month, day of the software cre-ation.
*2) G**.*** : The version of system controller (IC901 on the MAINboard).
M**.*** : The version of USB control module in the sysytemcontroller.
U**.*** : The version of USB controller (IC901 on the USBboard).
5. To release this mode, press three buttons of x , u and[ILLUMINATIOM] simultaneously.
CD ERROR CODE DISPLAY MODEThis mode can be used for error code display of CD section.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [CD] and [SURROUND] simulta-
neously.4. When this mode is activated, mechanism deck error code is
displayed on the fluorescent indicator tube.5. Press the [ENTER] button to changed over between optical
pick-up error code display mode and mechanism deck errorcode mode.
Note: There are two [ENTER] buttons on the HCD-GT55, but it works inthe same way whichever button is pressed.
6. Press the [TUNING +]/[TUNING ---] button to change over dis-play of error history number.
7. To release this mode, press the I/1 button to turn the poweroff.
1. Mechanism Deck Error Code ModeWhen this mode is entered, mechanism deck error code is displayedwith the 10-character format on the fluorescent indicator tube.
The first digit from the left indicates:The first digit from the left indicates which mode the error historyis. In the mechanism deck error code mode, M is displayed onthe fluorescent indicator tube.
The second digit from the left indicates:(Error history number display)The second digit from the left indicates which order the error historyis. 0 indicates the latest error history, and each time the numberincreases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:(Error status display)The third and 4th digit from the left indicates which error status isindicated.
Display Status0 0 No error0 8 Table operation time-out (Table does not move to the target
position within the specified time)1 6 In the chucking down operation, the operation was retried
by the maximum number of times but the operation couldnot be completed
1 7 In the chucking up and down operation, the reverserecovery processing was attempted but it could not berecovered
1 8 In the chucking up operation, the operation was retried bythe maximum number of times but the operation could notbe completed
2 0 Loading operation time-out (Table does not move to thetarget position within the specified time)
2 2 As the chuck was in the ex-open status at the initialization,the closing was attempted but could not be completed
The 5th and 6th digit from the left indicates:(Present status display)The 5th and 6th digit from the left indicates which operating statuswhen an error occurred is indicated.
Display Status0 1 Open completion status0 2 From open status, the movement to chucking down position
is under way0 3 From chucking down position, the open operation is under
way0 4 Chucking down completion status1 0 The chucking down operation is under way1 1 The chucking up operation is under way1 2 Close completion status1 3 From close status, the ex-open operation is under way1 4 From ex-open status, the close operation is under way1 8 Ex-pen completion status
The 7th and 8th digit from the left indicates:(Motor status display)The 7th and 8th digit from the left indicates which motor outputstatus when an error occurred is indicated.
Display Status 0 No table motor output 1 Table motor forward output 2 Table motor backward output 3 Table motor break output0 No loading motor output1 Loading motor forward output2 Loading motor backward output3 Loading motor break output
-
17
HCD-GT22/GT44/GT55
5 REPEAT LIMIT CANCEL MODENumber of repeat for CD playback is 5 times when the repeat modeis REPEAT. This mode is used to enables CD to repeat playbackfor limitless times.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [CD] and u simultaneously.4. The message LIMIT OFF is displayed on the fluorescent
indicator tube momentarily, CD repeat 5 limit is cancelled.
CD/USB POWER MANAGEThis mode is used to changed over CD and USB power on/off fordecreasing of reception noise in the tuner mode.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press the I/1 button to turn the power off.4. Press two buttons of x and I/1 simultaneously.5. The message CD POWER ON or CD POWER OFF is
displayed on the fluorescent indicator tube, and CD and USBpower on/off changed over in the tuner mode.
BOOSTER ON/OFFThis mode is used to changed over MP3 booster on/off.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [USB] button to select USB.3. Press three buttons of x , [SURROUND] and [USB] simulta-
neously.4. The message BOOSTER ON or BOOSTER OFF is
displayed on the fluorescent indicator tube, and MP3 boosteron/off changed over.
EXCITER ON/OFFThis mode is used to changed over the exciter on/off.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Insert a MP3 disc.4. Press three buttons of x ,[SURROUND] and [AUDIO] simul-
taneously.5. The message EXCITER ON or EXCITER OFF is
displayed on the fluorescent indicator tube, and the exciteron/off changed over.
CD SERVICE MODEThis mode can run the CD sled motor freely. Use this mode, forinstance, when cleaning the optical pick-up.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [FOLDER ---] and [SURROUND]
simultaneously, the message SERVICE is displayed on thefluorescent indicator tube.
4. Press the [TUNING ---] button to move the optical pick-up toinside track and the message SLED IN is displayed on thefluorescent indicator tude, or press the [TUNING +] button tooutside track and the message SLED OUT is displayed onthe fluorescent indicator tude.
5. Press the [DISPLAY] button, LD ON or LD OFF is dis-played on the fluorescent indicator tude. Each time [DISPLAY]button is pressed, laser diode on/off is changed over.
6. To release this mode, press three buttons of x , [FOLDER ---]and [SURROUND].
The 9th and 10 th digit from the left indicates:(Tray status display)The 9th and 10th digit from the left indicates which target processingwhen an error occurred is indicated.
Display Status0 1 Open operation1 2 Close operation1 8 Ex-open operation
2. Optical Pick-up Error Code ModeWhen this mode is entered, optical pick-up error code is displayedwith the 8-character format on the fluorescent indicator tube.
The first digit from the left indicates:The first digit from the left indicates which mode the error historyis. In the optical pick-up error code mode, D is displayed on thefluorescent indicator tube.
The second digit from the left indicates:(Error history No. display)The second digit from the left indicates which order the error historyis. 0 indicates the latest error history, and each time the numberincreases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:(Error status display)The third and 4th digit from the left indicates which error status isindicated.
Display Status0 1 Not focused (TOC read without a disc)0 2 GFS NG (TOC read with a disc chucked)0 3 Start operation time-over0 4 Defocused continuously (Defocused during TOC reading)0 5 Q code not entered for specified time0 6 Tracking not turned ON0 7 Blank disc (Blank disc TOC read)
The 5th and 6th digit from the left indicates:(Error step display)The 5th and 6th digit from the left indicates which processing whena trouble occurred
Display Contents0 1 Power OFF in progress0 2 Initialize in progress0 3 Oscillation stopping0 4 From oscillation stop, oscillation starting0 5 Stopping0 6 Stop operation is under way0 7 Start operation in progress0 8 TOC read in progress0 9 Search operation is under way0 A Playback operation is under way0 B Pause operation is under way0 C Playback manual search operation is under way0 D Pause manual search operation is under way0 E
The 7th and 8th digit from the left indicates:The 7th and 8th digit from the left indicates which operation inprogress when a trouble occurred. (Step of each processing of the5th and 6th digits is indicated)
-
18
HCD-GT22/GT44/GT55
PANEL TEST MODEThis mode is used to check the fluorescent indicator tube, LEDs, phones jack, keys and control knobs.Procedure:
1. Press the I/1 button to turn the power on.2. Press three buttons of x , [SURROUND] and [TUNER] simultaneously.3. All segments on the fluorescent indicator tube and all LEDs light up.4. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key routes check mode.5. In this mode, each time any button is pressed, it displays key route and key number of the button. (Refer to following table)
Example: [DISPLAY] button : KEY 10000[TUNER/BAND] button : KEY 40000[ILLUMINATION] button : KEY 01000[CD-TAPE SYNC] button : KEY 00070
6. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key check mode.7. In this mode, each time any button is pressed, KEYCONT value increases. However, once a button is pressed, it is no longer
taken into account. (Maximum numbers are GT22: 29, GT44: 30, GT55: 39)8. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the phones jack check mode.9. In this mode, H_P ON is displayed when phones jack is inserted, and H_P OFF is displayed when phones jack is pulled out.10. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the volume check mode and display VOLUME
FLAT.11. In this mode, VOLUME UP is displayed when [VOLUME] knob is turned clockwise, and VOLUME DOWN is displayed
when [VOLUME] knob is turned counterclockwise.12. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the jog check mode and display JOG FLAT.13. In this mode, JOG UP is displayed when [OPERATION DIAL] knob is turned clockwise, and JOG DOWN is displayed when
[OPERATION DIAL] knob is turned counterclockwise.14. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to release the Panel Test mode.
Key Key RoutesNo. KEY0 KEY1 KEY2 KEY3 KEY4 (GT55 only)1 DISPLAY ILLUMINATION ENTER DISC 1 +2 POWER ERASE RETURN DISC 2 ENTER(PEQ)3 CD PRESET EQ FOLDER + DISC 3
4 TUNER/BAND GROOVE TUNING +EX-CHANGE/
GUITARDISC SKIP5 TAPE A/B SURROUND PLAY/PAUSE STOP FOCUS (GUITAR)
6 AUDIOEQ BAND (GT22/GT44)
TUNING CD-USB SYNC/REC1 FOCUS (VOCAL)PLAY MODE (GT55)7 USB FOLDER CD-TAPE SYNC VOCAL
8SUBWOOFER
OPEN/CLOSETAPE REC
BASS(GT44/GT55) PAUSE/START9 FOCUS (BASS)
-
19
HCD-GT22/GT44/GT55SECTION 5
MECHANICAL ADJUSTMENTSPRECAUTION
1. Clean the following parts with a denatured-alcohol-moistenedswab :
record/playback head pinch rollererase head rubber beltscapstan idlers
2. Demagnetize the record/playback head with a headdemagnetizer. (Do not bring the head magnetizer close to theerase head.)
3. Do not use a magnetized screwdriver for the adjustments.4. After the adjustments, appiy suitable locking compound to
the parts adjusted.5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
TORQUE MEASUREMENTMode Torque Meter Meter Reading
2.6 6.9 mNmFWD CQ-102C (30 70 gcm)
(0.41 0.97 ozinch)
FWD0.15 0.59 mNm
Back TensionCQ-102C (1.5 6.0 gcm)
(0.021 0.083 ozinch)5.4 16.7 mNm
FF/REW CQ-201B 55 170 gcm)0.76 2.35 ozinch)
TAPE TENSION MEASUREMENTMode Tension Meter Meter Reading
FWD CQ-403A more than 100 g(more than 3.53 oz)
-
20
HCD-GT22/GT44/GT55
3. Mode: Playback
set
test tapeP-4-A063(6.3 kHz, 10 dB) oscilloscope
V H
waveform of oscilloscope
0 +4545 +90 +135 +180good wrong
MIC boardPHONES jack(J803)
2. Turn the adjustment screw and check output peaks. If the peaksdo not match for L-CH and R-CH, turn the adjustment screwso that outputs match within 1dB of peak.
Screwposition
L-CHpeak
within1dB
Outputlevel
L-CHpeak
R-CHpeak
within1dB
Screwposition
R-CHpeak
SECTION 6ELECTRICAL ADJUSTMENTS
0 dB=0.775 VDECK SECTION
set
MIC boardPHONES jack(J803)
+
level meter
test tapeP-4-A063(6.3 kHz, 10 dB)
1. Demagnetize the record/playback head with a headdemagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.3. After the adjustments, apply suitable locking compound to the
parts adjust.
TEST TAPE
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENTNote: Perform this adjustment for both decks.
Procedure:1. Mode: Playback
Tape Signal Used forP-4-A063 6.3 kHz, -10 dB Azimuth Adjustment
4. After the adjustments, apply suitable locking compound tothe pats adjusted.
Adjustment Location: Playback Head (DECK-A)Record/Playback/Erase Head (DECK-B)
-
21
HCD-GT22/GT44/GT55
CD SECTION
Note:1. CD Block is basically constructed to operate without adjustment.2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.3. Use an oscilloscope with more than 10 M impedance.4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure :1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
CD board.2. Press the I/1 button to turn the power ON.3. Set disc (YEDS-18) on the tray and press the u button to
playback.4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)A good eye pattern means that the diamond shape () in thecenter of the waveform can be clearly distinguished.
Checking Location:
+
CD board
TP121 (RFI)TP124 (VC)
oscilloscope(DC range)
VOLT/DIV: 200 mVTIME/DIV: 500 ns
level:1.2 0.3 Vp-p
TUNER SECTION
FM TUNE LEVEL CHECK
Procedure:1. Turn on the set.2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHzModulation : 1 kHzANT input : 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the set.You cannot use video cable for checking.Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.4. Confirm TUNED is lit on the display for A, B and C signals.
When the selected station signal is received in good condition,TUNED is displayed.
signal generator
set
TP124(VC)
CD Board (Conductor Side)
TP121(RFI)
IC101
-
22
HCD-GT22/GT44/GT55
MEMO
-
HCD-GT22/GT44/GT55
2323HCD-GT22/GT44/GT55
SECTION 7DIAGRAMS
7-1. BLOCK DIAGRAM CD SERVO, USB Section
SYSTEM CONTROLLERIC901 (1/4)
CD-MP3 PROCESSORIC101
MUTE
2-AXISDEVICE
(TRA
CKIN
G)(F
OCUS
)
95
89
A
BD+3.3VDETECTOR
FNi1 (A)
RFo97 FPi1 (B)
88
2
AGCi
3RFRP RFZi
76TEi TEZi
83RFEQo 81 RFi82 RFRPi
30LO
27RO
65AIN (PI4)66BCKi (PI5)
BCKA-IN
BUS1-U
BUS0-U
BUS2-U
BUS3-U
BUCK-U
67LRCKi (PI6)LRCK
51PIO3GATE
46AoUT3 (PO4)ST-REQ
38BUS0
R-CH94 FNi2 (C)
96 FPi2 (D)
100 TNi (E)
98 TPi (F)
91 LDo 92MDi
2 VO1+
1 VO1
13 DMo
LDPD
LASER DIODE
OPTICAL PICK-UPBLOCK
(KSM-213DCP)
B
C
D
E
F
12 FMo
10 TRo
9 FOo
20 IO0 (/HSO)
I-V A
MP
M401(SPINDLE)
M402(SLED)
12 VO2
11 VO2+
18 VO3+
17 VO3
26 VO4+
27
7
IN4 24
IN3 20
IN2 9
IN1 3
BIAS 23
84 VRo
VO4
M
M
FOCUS/TRACKING COIL DRIVE,SLED/SPINDLE MOTOR DRIVE
IC401
S201(LIMIT)
BD+3.3V
24 XO
23 XI
X10216.9344MHz
7 CD-M-MUTE
ACD-L
: CD PLAY
SIGNAL PATHR-ch is omitted due to same as L-ch.
: USB
VCC
A
B
C
D
E
F
LD
PD
SP+
VC
SP
SL+
SL
T+
T
F+
F
47AOUT2 (PO5)63BCK (PO8)
CLKDATA
1 2 17 CD-BUS0 (I/O)13
39BUS1 3 4 16 CD-BUS1 (I/O)5
40BUS2 (SO) 9 8 15 CD-BUS2 (I/O)
12 CD-BUCK
641BUS3 (SI) 11 10 14 CD-BUS3 (I/O)
19 CD-SEL112
BUS SWITCHIC301
1 213
3 45
9 86
11 1012
BUS SWITCHIC302
DATA SELECTORIC303
SELECT
42BUCK (CLK) 42
3
CCE-U13 CD-CCE
43XCCE
54SBSY
48PIO0
7
18 MP3 IREQ
21 CD-SEL2
29 I-SBSY37XRST 6 CD XRST
5
REQ-U
6
1214
13
910
11
1
CLKDATA
LB
I/O0
I/O
15
D0
D15
S-RAMIC921
39UB40
OE41WE17
CE6
79D+
80D
77USBOC
USB CONTROLLERIC901 CN803
(USB)
3
2
1
D+
D
78USBPON
70CS264RD65WR66SRLLB67SRLUB
VBUS
VBUS POWERON/OFF SWITCH
IC915
5
1
4 OUT
EN3
FLG
INVBUS+5V
93 DATA92 BCK
85 DATA86 CLOCK
71 LRCK94 GATE97 ST-REQ
55 BUS056 BUS1
88 RXD187 TXD1
2 DI84 DO1 /RESET
57 BUS258 BUS359 /BUCK60 /CCE96 REQ
7
10, 1
3
16,
29
32,
35
38
18
25,
28
35
A0
A15
A1
A16
44
42,
27
24
,21
1
8, 5
1
37
43,
46
54
73 X2
75 X1
X9019MHz
AUTOMATICPOWER
CONTROLQ301
BCKA-IN
LRCKGATEST-REQ
BUS1-UBUS0-U
BUS2-UBUS3-UBUCK-UCCE-UREQ-U
43O-USB-TXD (SO)42I-USB-RXD (SI)
10O-USB-RST (DO)9I-USB-CTS (DI)11O-USB-RESET
LOADING MOTOR DRIVEIC701
FINRIN
O-LM-F
S751
LEVEL SHIFTQ731
DISC TABLEADDRESS SENSOR
IC731
23 OUT1 4OUT2 2
79O-LM-R 22
M M751(LOADING)
TABLE MOTOR DRIVEIC712
FINRIN
O-TM-F 25 OUT1 4OUT2 2
79O-TM-R 24
I-CD-SENS 26
I-ENCD 55
I-OPEN-SW 27
M M741(TABLE)
ROTARYENCODER
S711
DISC TABLEADDRESS DETECT
OPEN
CLOSE
DISC TABLEOPEN/CLOSE
DETECT
RECD801
(USB)
O-USB-LED 37 LED DRIVEQ931
(Page 24)
-
HCD-GT22/GT44/GT55
2424HCD-GT22/GT44/GT55
7-2. BLOCK DIAGRAM MAIN Section
R-CH
HP INB
CD-LA
T001BIAS OSC
MUTINGQ305
HRPE1(REC/PB/ERASE)
(DECK-B)
HP1(PB)
(DECK-A)
L-CH
R-CHR-CH
L-CH
R-CHR-CH
R-CH
R-CH
MUTINGQ307
MUTING CONTROLSWITCH
Q305, 306
MUTINGQ401, 403
R-CHMUTING
CONTROL SWITCHQ407
REC CONTROLSWITCH
Q409, 410
R-CH
REC AMPIC401
PB AMPIC301
ERASE
BIAS OSCQ453
REC SWITCHQ405
PB SWITCH(DECK-B)
Q303
REC BIASSWITCH
Q454, 455
AUDIO+9V
R-CH
PB SWITCH(DECK-A)
Q301
R-CH
+
DECK-A/BSELECT SWITCH,
REC/PB SELECT SWITCH
Q408
TUNER (FM/AM)
AM
FM ANT
AM ANT
TUNER-L
TUNER-R
PLL DO
R-CH
PLL DIPLL CLK
PLL CE
FM75(COAXIAL)
ANTENNA
AUDIOJ802
31 I-LV23004T-DI
TUNED 34 I-TUNED
39 TAPE-L
1 TUNER-L
2
5
LIN
DATA
6
CLK
16
DATA
15
CLK
2
10
AUX-L
37 MIX2
11 VOL IN-LTONE OUT-L 14OUT-L
9LOUT
40 CD-L
O-BI
AS
33 O-LV23004T-DO32 O-LV23004T-CLK28 O-LC72121-CE
49
O-RE
C/PB
46
O-RE
C-M
UTE
48
O-F-
DATA
41
4
SAOU
TI-S
TREA
M
67
O-AU
DIO-
CLK
45
O-P-
DATA
44
I-HP/
MIC
58
12BB12
13BB22
DSW OUT
COUT
EBASS AGC3REC OUT-L
I-VAC
S
I-TAPE-STAT
59
D213 D211
BAND-PASSFILTER
Q111, 112
+4.1VREGULATOR
Q701
+R-CH
R-CH
M+9V
BASS AGCQ113
BUFFERQ702
D031
3
PARAMETRIC EQUALIZERIC102
(GT55)
(GT22/GT44)
INPUT SELECTOR, TONE CONTROL,ELECTRICAL VOLUME
IC103
CAMP+ M
TAPE MECHANISMDECK BLOCK
A-HALF
B-SOL
B-HALF
A-PHOTOB-PHOTOB-REC-F
CAPSTAN/REELMOTOR DRIVE
Q911, 914
TRIGGER PLUNGERDRIVE (DECK-B)
Q912, 915
60
O-B-SOL 87
A-SOLTRIGGER PLUNGERDRIVE (DECK-A)
Q913, 916O-A-SOL 88
O-MOTOR 85
I-RELL-A 78I-RELL-B 79SYSTEM CONTROLLER
IC901 (2/4)
: TUNER (FM/AM)
: CD PLAY
SIGNAL PATHR-ch is omitted due to same as L-ch.
: TAPE PLAY (DECK-A)
: TAPE PLAY (DECK-B)
: MIC
: TAPE REC
: AUDIO IN
(GT44/GT55)
(GT22: E2, E3, E13, E51, MX, AR/GT44: E2, E3, E13, E51, MX, AR/GT55)
AUDIO+9V
J801MIC
RV801MIC LEVEL
MUTINGQ801
MIC AMPIC801 (1/2)
MIC AMPIC801 (2/2)
4
L+R SIGNAL
D-LIGHT B+
D-LIGHTSYNC OUT
J701
AbbreviationAR : Argentina modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE13 : 220V - 230V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model
(Page 23)
(Page 25)
(Page 25)
(Page 25)
(Page 25)
-
HCD-GT22/GT44/GT55
2525HCD-GT22/GT44/GT55
7-3. BLOCK DIAGRAM AMP Section
OUT BUFFERIC251C
BASS AGCE
SW OUTD
POWER AMP
MUTINGQ251
OVER LOADDETECT
Q441
OVER LOADDETECT
Q501
R-CH
MUTINGQ272
BUFFERQ121
LINE AMPIC252
STANDBY SWITCHQ489
DC DETECTQ481, 482
IC441 (GT22/GT55)IC441 (GT44)
+
+
TEMPERATUREDETECT
Q483, 484
TEMPERATUREDETECT
Q503, 507
R-CH
R-CH
R-CH
TH441
+
++
POWER AMPIC501
MUTINGCONTROL SWITCH
Q261
O-SY
S-M
UTE
1
O-ST
K-M
UTE
36
O-SW
R
2
+ R-CH
PROTECTORQ485
RELAY DRIVEQ486, 488 (GT22)
Q480, 486, 488 (GT44/GT55)
+PROTECTDETECT
Q487
FAN MOTORDRIVE
Q043 045
FAN MOTORDETECT
Q046
RY441
BHP IN
FPROTECT
1
2R
L++
RY501
D037
M M001(FAN)
SPEAKER
PHONES
JK441
+
SUB WOOFER OUT
JK501
RELAY DRIVEQ502
SUB WOOFERSWITCH
Q274
R-CH
AUDIO+9VJ803
SYSTEM CONTROLLERIC901 (3/4)
: TUNER (FM/AM)
SIGNAL PATHR-ch is omitted due to same as L-ch.
DC DETECTQ505, 506
(GT44/GT55)
(Page 24)
(Page 24)
(Page 24)
(Page 26)
(Page 24)
-
HCD-GT22/GT44/GT55
2626HCD-GT22/GT44/GT55
7-4. BLOCK DIAGRAM PANEL, POWER AMP Section
REMOTE CONTROLRECEIVER
IC601
FL701FLUORESCENT
INDICATORTUBE
76 O-SWR-LED
I-KEY0 I-KEY3KEY0 KEY4 KEY0 KEY3
KEY0
KEY4
FLUORESCENT INDICATORTUBE DRIVER
IC701SYSTEM CONTROLLER
IC901 (4/4)
F906
RECTD902 905
PROTECTDETECT
Q011
RECTD001
RECTD910
D006
O-S-LED1 O-S-LED6
S601 608 (KEY0),S611 616 (KEY1),S621 628 (KEY2),S631 638 (KEY3),S641 649 (KEY4)S608 (GT44/GT55),S641 649 (GT55)
5O-POWER-RELAY
35I-AC-CUTRESET SIGNALGENERATOR
IC902
RESET SWITCHQ903 905
D902
+3.3V
BD+3.3V
UNREG +16V
VBUS+5V
EVER +10V
LEVEL SHIFTQ908
57I-PROTECTOR
90RESET
83 I-WAKEUPKEY
56 I-KEY4
66 I-VOL
2
13,
15, 1
6
DR35 [S0] DR16 [S19]38
1
9
DR0 [T0] DR13 [T13]
70
75
61
64
LED DRIVEQ601 606
GRID DRIVEQ701 714
D601 606(STREAM)
O-G-LED,O-V-LED,O-B-LED3
8
40LED DRIVEQ921 923
LED DRIVEQ607
D612SUBWOOFER
77 O-STBY-LED
81 I-SIRCS-IN
D611STANDBY
ROTARYENCODER
MASTERVOLUME
OPERATIONDIAL
S651
BASSD609
VOCALD608
GUITARD607
65 I-JOGROTARYENCODER
S652
94 X2
95 X1X902
20MHz
91 XT2
92 XT1X901
32.768kHz
SI O-NJM3427A-DATA49 84SCK O-NJM3427A2-CLK48 86CSb O-NJM3427FA2-CS51 68
RSTb O-NJM3427FA2-RESET52 69
(AC IN)
RY901
POWER ON/OFFRELAY DRIVE
Q903
VOLTAGESELECTOR
S901
D+1.5V+1.5V
REGULATORIC201
USB+3.3V
D008
D009D301, 302
D908
AUDIO+9V
M+9VM+7V
F907RECT
D011 014
RECTD021 024
F904F905RECTD402
F908F909RECTD401
D007
FPROTECT
+9VREGULATOR
IC021
+9VREGULATOR
IC011
+3.3VREGULATOR
IC006
+5VREGULATOR
IC007
+4VREGULATOR
Q901, 902
RELAY B+
3O-FRONT-SP-RELAY
52I-USB-MONI
8O-USB-POWER
4O-CD-POWER
B+ SWITCHQ041, 042
B+ SWITCHQ301, 302
B+ SWITCHQ303, 304
27VREGULATOR
Q902
AMPSECTION
B+
AMPSECTION
B+
FORFLUORESCENT
INDICATORTUBE
(GT22/GT55)
(GT44)
VFL
VFVF
PT902SUB POWER
TRANSFORMER
PT901MAIN POWER
TRANSFORMER
GT22: MX, AR, AUS/GT44: MX, AR, AUS/
GT55: MX, AR
GT22: E2, E3, E13, E51/GT44: E2, E3, E13, E51/
GT55: E2, E51
GT22: MX, AR, AUS/GT44: MX, AR, AUS/
GT55: MX, AR
(GT44/GT55)
(GT55)
45
46
XT
XTb
OSC
VDD+3.3V
D+3.3V,VREF+3.3V
+VHVH
+VLVL
F909F904RECTD401
+VCCVCC
AbbreviationAR : Argentina modelAUS : Australian modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE13 : 220V - 230V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model
(Page 25)
-
HCD-GT22/GT44/GT55
2727HCD-GT22/GT44/GT55
Note For Printed Wiring Boards and Schematic Diagrams
Indication of transistor
Note on Schematic Diagram: All capacitors are in F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolyticsand tantalums.
All resistors are in and 1/4
W or less unless otherwisespecified.
f : internal component. 2 : nonflammable resistor. 5 : fusible resistor. C : panel designation.
A : B+ Line. B : B Line. Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions. CD Board no mark : CD PLAY[ ] : USB USB Board no mark : USB TC Board no mark : TAPE PLAY( ) : TAPE REC : TAPE A{ } : TAPE B Other Board no mark : TUNER (FM/AM)( ) : CD PLAY[ ] : TAPE PLAY
: Impossible to measure Voltages are taken with a VOM (Input impedance 10 M).
Voltage variations may be noted due to normal produc-tion tolerances.
Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.
Circled numbers refer to waveforms. Signal path.F : TUNER (FM/AM)J : CD PLAY
: USBE : TAPE PLAY (DECK-A)d : TAPE PLAY (DECK-B)G : TAPE RECf : AUDIO INN : MIC
AbbreviationAR : Argentina modelAUS : Australian modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE13 : 220V 230V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model
Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. W : indicates side identified with part number. f : internal component. : Pattern from the side which enables seeing.(The other layers' patterns are not indicated.)Caution:Pattern face side: Parts on the pattern face side seen from(Conductor Side) the pattern face are indicated.Parts face side: Parts on the parts face side seen from(Component Side) the parts face are indicated.
Circuit Boards Location
C
BThese are omitted.
EQ
B
These are omitted.
C E
Q
Note: The components identified by mark 0 or dotted linewith mark 0 are critical for safety.Replace only with part number specified.
CD boardSW board
MOTOR (LD) board
SENSOR board
DRIVER board
MOTOR (TB) board
TUNER (FM/AM)
KEY LEFT board
KEY TOP board(GT55)
PANEL board
VOLUME board
KEY RIGHT board
USB board
MIC board
MAIN board
5V REG board
SUB WOOFER board (GT44/GT55)
AMP board
TC board
SW-SP board (GT44/GT55)
TRANS board
D-LIGHT SYNC board (except Australian model)
-
HCD-GT22/GT44/GT55
2828HCD-GT22/GT44/GT55
7-5. PRINTED WIRING BOARD CD Board : Uses unleaded solder. See page 27 for Circuit Boards Location.
R402
C404 C403
R405
R408
IC401
R108
R109
C136
C135
R128
R130
R134
R135
R136 R129
R139
R143R142R140
C124
C125
C122
C123
R151C138
C137
C140
C139
C142C141
C143R144
C100
C107
R414
C144C146
C145
C147C148
C149
C150
R148
R146
C105
C104
R145
R147
R149
R150
C118C117
CN301
C303
C302
C301
R102C127C126
R101C103
C113
C102
C101
C119
C120
R105
R106
C132
R104
R154 C1
16
R153
C109
C110 R110
IC101R210
R209
R218 R208
R219 R207R220 R206R221
R205R222
R204R223 R203
R157
R156
R202
CN202
C152
C151
R224
M401
S201
M402
C405
C401
R415
R114
C153R118
R212R213
C106
C306
R303
R304R302
R301
C307
Q301
C309
C128
C130
R155
C115
R111
R112
C133
R119
C112
C108
R214
R216R121
C201
C202
C204
C205R201
C206
IC201C207
R211
X102
X102
CD BOARD (CONDUCTOR SIDE)
1-872-620-
11
(11)
(LIMIT)
M
(SPINDLE)M
(SLED)
AMAIN BOARD
CN302
TP124(VC)
TP121(RFI)
OPTICAL PICK-UPBLOCK
(KSM-213DCP)
1
3
5
4
CD BOARD (COMPONENT SIDE)
1-872-620-
11
(11)
E
A
B
C
D
E
F
1 2 3 4 5 6 7 8 9 10
(Page 37)
-
HCD-GT22/GT44/GT55
2929HCD-GT22/GT44/GT55
7-6. SCHEMATIC DIAGRAM CD Board See page 36 for Waveforms. See page 58 for IC Block Diagrams. See page 61 for IC Pin Function Description.
IC B/D
AMAIN
BOARD(3/4)
CN302
2
1
IC B/D
OPTICALPICK-UPBLOCK
(KSM-213DCP)
M
M
DATACLK
++
+
R224 100
R121100
R108R109 100
R154
R153
C201
R304
R201
R110
R303
R203
R204
R205
R206
R207
R208
R209
R210
R219
R223
R222
R221
R218
R112
R202
R211
Q301
R301
C202
R157
TP121 (RFI)
TP124 (VC)
R156
CN301
R101
C401R415
R102
R1
28
R129
R143
R142 R139
R114R140
R151
R220
R150
R212
IC101
R105
R106
IC201
X102
C301
C307
C309
C100
C138
C153
C151
C204
C13
0
C12
8
C1
13
C1
27
C126
C103
C102
C120
C118
C117
C101
C1
24
C125
R145
R146
R147
R148
R149
C149
C105
C143
C146
C145C148
C104
C405 C404 C403
C205C116
C133
CN202
C110
R111
C115R155
C109
C132
R104
C123
C122
C139
C150
R136 R135
R134 C112 C108
R11
9
R118
C136C107
R130
R144
C144
C147
C140
C137
C141
C142
C106
R302
C306
C303C302
R405
R402
R408
R414
C207
C152
C206
IC401
1M
1M
10010V
2.2
0
10k
2.2
100
100
100
100
100
100
100
100
100k
100k
100k
100k
100k
100
0
100
2SA2119K
100k
10010V
100
100
16P
220
22010V47k
10k47
0k
1k
47k
22k 47k
10k0
0
100k
0
TK63115SCL-G@GT
0.1
1
0.001
0.1
470p
470p
0.1
0.1
0.0
022
0.1
0.1
0.1
0.01
0.01
0.022C1190.022
0.1
0.0
047
0.0
047
0
0
0
0
0
22p
0.1
0.01
470p
0.01
47p
0.1
0.10.1
0.1
0.1
0.1
0.1
0.1
100
226.3V
47
0.1
0.1
0
470p
470p
0.01
0.001
22k 470k
1M 0.1 0.1
47p0.1
4.7k
22k
0.1
0.1
0.01
0.01
0.0022
0.1
10010V
0
10010V
1010
10k
2.2k
2.2k
4.7k
1
470p
1
BA5826SFP-E2
SP-
SP+
SL+
SL-
100
R213 100
R214 100
R216 100
1M 1k
16.9344MHz
TC94A70FG-008 (S, D)
5p5
p
27P
0
100k
IC101CD-MP3 PROCESSOR
IC401FOCUS/TRACKING COIL DRIVE,SLED/SPINDLE MOTOR DRIVE
IC201+1.5V REGULATOR
SP-
SP+
SL+
SL-
M401(SPINDLE)
M402(SLED)
AUTOMATIC POWERCONTROL
S201(LIMIT)
0.1
(Page 40)
-
HCD-GT22/GT44/GT55
3030HCD-GT22/GT44/GT55
7-7. PRINTED WIRING BOARDS CHANGE Section : Uses unleaded solder. See page 27 for Circuit Boards Location.
JW702
JW703
JW704
JW705
JW706
JW707
JW70
8
JW711
CN705
JW712
JW701
JW70
9
JW713
JW714
JW710
R736
CN702
R751
C752
CN703
CN704
IC712
R713
Q731
C751
D711
D701
C737
R734
R733
R732
R723
R722
R721
R731
R712
R711
R702
R701
C736
C735
C741
C731
C715
IC701
CN701
CN721
M751
IC731
CN731
CN741
CN742
M741
CN751
S751
1-866-201-
12
(12)
1
2
E
DRIVER BOARD
BMAIN
BOARD
1
9
1
9
1
4S711ROTARY ENCODER
DISC TABLEADDRESS DETECT
1 2
M
MOTOR (LD) BOARD
1-687-133-
12
(12)
(LOADING)
12
SENSOR BOARD
1-68
7-13
2-
12
(12)
E
C
A
K
MOTOR (TB) BOARD
M
1-68
7-13
4-
12
(12)
1
3
(TABLE)
SW BOARD
1-687-669-
12
(12)
1
2
DISC TABLEOPEN/CLOSE
DETECTOPEN
CLOSE
A
B
C
D
E
F
G
H
1 2 3 4 5 6 7 8 9 10
(Page 37)
SemiconductorLocation
Ref. No. LocationD701 E-7D711 E-7
IC701 F-7IC712 F-8IC731 F-5
Q731 C-9
-
HCD-GT22/GT44/GT55
3131HCD-GT22/GT44/GT55
7-8. SCHEMATIC DIAGRAM CHANGE Section See page 58 for IC Block Diagrams.
C741
R702 R701
D701C751
R713
R712 R711
D711
CN721
R7
22
R7
21
R7
23
C7
36
C7
35
C7
37
R731
C731
R733
CN704
E3
E2
E1
CN703
CN742 CN702
CN741
IC731
CN751 CN705
C752 R751
CN731
Q731
M751
M741
IC701
IC712
R734 R732
CN701C715
R736
S751
0.01
100 470
MTZJ-T-775.1A0.01
22k
4.7k 1k
MTZJ-T-773.6B
2P
4.7
k
4.7
k
4.7
k
0.1
0.1
0.1
100
1050V
1k
2P
4P
5P 5P
3P
RPI-576
2P 2P
0.1 4.7k
3P
DTC114ESA
BA6956AN
BA6956AN
12k 10k
13P10016V
390
RN
FR
NF
TM-2
GND
TM-1
SENS-IN
SENS-OUT
GND
TM-1
TM-2
SENS-IN
SENS-OUT
GND
SENS-IN
SENS-OUT
GND
SENS-IN
SENS-OUT
GND GND
OPEN SW OPEN SW
LM-2
LM-1 LM-1
LM-2
GND
E-1
E-2
E-3
VC
C
OU
T2
GN
D
VR
EF
OU
T1
VM
FIN
RIN
VC
C
OU
T2
GN
D
VR
EF
OU
T1
VM
FIN
RIN
LM-R
TM-R
E-1
E-2
E-3
TBL ADDRESS SENS
OPEN SW
(LOADING)
ADDRESS DETECT
(TABLE)
OPEN
CLOSE
OPEN/CLOSE
DETECT
DRIVE
LOADING MOTOR
DRIVE
TABLE MOTOR
LEVEL
SHIFT
D+3.3V
M+9V
M-GND
M-GND
LM-F
TM-F
DISC TABLE
S711
DISC TABLE
DISC TABLE
ADDRESS SENSOR
ROTARY ENCODER
BMAINBOARD(3/4)
(Page 40)
-
HCD-GT22/GT44/GT55
3232HCD-GT22/GT44/GT55
7-9. PRINTED WIRING BOARD USB Board : Uses unleaded solder. See page 27 for Circuit Boards Location.
R928
CN904
C902
C903
C904
C905
C907R983
R901
R937
R938
C901IC915
C916
C917
R913
R915
X901
C909R919C910
C912
R981
R985
C908
R922
C913
R934
R986
C915
C906
C922
C921
R977
R978
R979
R932
R982
R984
R976
CN907
CN901
CN903
RB922 RB921
IC921
RB92
4RB
923
R975R974
R973R972
R971R970
R902
R941
R943 R9
04
R944
R905
R906
R903
R942
R907C930
FB902
D901
FB901
R917
R916
D902
C920
R925
R926
R924
R923
C914
R920R921
R945
R933
R947
R950
JR90
2
IC901
C919
D MAIN BOARDCN301
USB BOARD (COMPONENT SIDE)
1-872-405-
12
(12) 1-872-405-
12
(12)
USB BOARD (CONDUCTOR SIDE)
K
A/KA
A/K A
K
(NC)
C 5V REG BOARD
3 1
4 5
A
B
C
D
1 2 3 4 5 6 7 8 9 10
14
21
E MIC BOARDCN802
(Page 37)
(Page 37)
(Page 42)
-
HCD-GT22/GT44/GT55
3333HCD-GT22/GT44/GT55
7-10. SCHEMATIC DIAGRAM USB Board See page 36 for Waveforms. See page 58 for IC Block Diagrams. See page 61 for IC Pin Function Description.
C5V REGBOARD
EMIC
BOARDCN802
DMAIN
BOARD(3/4)
CN301
11
R986 100DATA
R985 100CLOCK
C9300
C9190.1
CLOCK
DATA
CLK
DATA
R970
R971
R972
R973
R974
R975
R976
R977
R979
R978
R932
R982
R984
RB922
RB921
RB923
RB924
C907
C906
C921
R9
01
C9
01
R9
37
R9
83
C9
02
JR9
02
C9
03
C922
R9
07
R9
06
R9
05
R9
04
R9
03
R9
02
R917
R9
15
R9
13
C9
08
R919
C909
R916
C910C912
R9
44
R9
43
R9
42
R9
41
C905C904
R933
R934
R938
C915
C913
C914
R981
R922
R924
R923
R921
IC921
CN904
R926
R925C920
IC915
C916
R920
CN907
CN903
CN901
FB902
FB901
D902
C917
R945
R947
IC901
R928
D901
X901
R950
100
100
100
100
100
100
100
100
100
100
100
100
100
47
47
47
47
0.1
0.1
0.1
10
k
0.1
10
0
10
0
10
16
V
0 10
16
V
0.1
4.7
k
4.7
k
4.7
k
4.7
k
4.7
k
4.7
k
0
10
k
10
0k
0.1
100
22p
0
22p10p
10
0k
10
0k
10
0k
10
0k
0.11016V
0
10k
100
0.1
0.1
0.1
100
100k
27
27
100k
IS61LV6416-10T
7P
15k
15k0.1
R5523N001BTR-F
0.1
10k
21P
5P
2P
4.7k
4.7k
0
9MHz
4.7k
A13
A14
A15
D0
D1
D2
D3
D4
D5
D6
D7
RD
WR
LB
UB
SR
AM
-CS
A8
A9
A10
D7
D4
D5
D6
WR
D0
D1
D2
D3
SRAM-CS
A11
A12
A13
A14
A15
LB
UB
RD
A7
A8
A9
A10
A11
A12
A4
A5
A6
D12
D13
D14
D15
A4
A5
A6
D8
D9
D10
D11
D12
D13
D14
D15
BU
S0
BU
S1
BU
S2
BU
S3
BU
CK
CC
E
USB-SI
USB-SO
DO
US
B-R
ST
LR
CK
BCK
REQ
ST-REQ
A-IN
GATE
LRCK
CCE
BUCK
BUS3
BUS2
BUS1
BUS0
DO
DI
USB-SO
USB-SI
BCK
A-IN
GATE
REQ
ST-REQ
USB-RST
DI
A7
A16
A16
A1
A2
A3
A1
A2
A3
D11
D10
D9
D8
BOOT
AMO
TXD1
RXD1
RES
ET
BOOT
AM0
TXD1
RXD1
RESET
EN
FLG
EN
FLG
MC2837
2206.3V
TMP92CD28FG-2CB4
MC2837
D+
D-
AM0
DVSS
DVSS
RV
OU
T1
RV
IN
RV
IN
RV
OU
T2 DVSS
DVSS
DV
SS
AM
1
X2
DV
SS
X1
VBUS-5V
DVDD+3.3V
DVSS
LRCK
CCE
BUCK
BUS3
BUS2
BUS1
BUS0
USB-RST
ST-REQ
REQ
GATE
A-IN
BCK
VBUS-GND
BOOT
RESET
RXD1
TXD1
DVSS
VCC
AM0
DI(CTS)
DO(RTS)
USB-SI(RXD)
USB-SO(TXD)
NC
A6
A5
A4
A3
NC
I/O8
I/O10
I/O11
VDD
GND
I/O12
I/O13
I/O14
I/O15
A2
A1
A0
I/O9
NC
A7
A8
A9
A10
I/O7
I/O6
I/O5
I/O4
GND
VDD
I/O3
I/O2
I/O1
I/O0
A11
A12
A13
A14
A15
WE
CELB
UB
OE
A1
3
GND
D+
D-
VBUS
EN
GND
OUT
INFLG
(USB)
(NC)
S-RAM
VBUS POWER ON/OFF SWITCH
A12
A11
A10
A9
A8
DVCC
A7
A6
A5
A4
A3
A2
A1
A0
D15
D14
D13
D12
D11
D10
D9
D8
DVCC
D7
D6
D5
D4
D3
S2
D1
D0
DV
SS
DV
CC
DV
CC
DV
SS
NO
US
E
NO
US
E
NO
US
E
DV
CC
G-3
NO
US
E
NO
US
E
DI
G-2
G-1
ST-REQ
REQ
DVCC
GATE
DATA
BCK
SCL
SDA
NO USE
RXD1
TXD1
CLOCK
DATA
DO
NO USE
USBPON
USBOC
DVCC
BO
OT
NO
US
E
SR
LU
B
SR
LL
B
RD
WR
CS
2
DV
CC
NO
US
E
/CC
E
/BU
CK
BU
S3
BU
S2
BU
S1
BU
S0
A1
6
A1
5
A1
4
USB CONTROLLER
LR
CK
/RE
SE
T
(Page 40)
(Page 43)
(Page 41)
-
HCD-GT22/GT44/GT55
3434HCD-GT22/GT44/GT55
IC30
1
IC401D401
Q303
Q402
Q301
Q401
Q302
Q408
Q304
Q306
Q404
Q410
Q405
Q407
Q406
Q454
Q305
Q403
Q409
C355
C354
C353
C352
C328
C327 C324
C323
C316
C315 C
304
C303
C302C301
C466
C462C461
C433 C430
C418C417
C416
C414C413
C412
C411
C406 C405
C404
C403
JR31
6
JR315
JR313
R351
R350R349
R326
R325
R324
R323
R322R321
R320R319
R318
R317
R316
R315
R314
R313
R312
R311
R310
R309
R308
R307
R306
R305
R304
R303
R302R301
R487
R486
R484
R483
R482R481
R464R463
R462R461
R459
R458
R457
R456
R455
R454
R453
R452
R451
R450
R449
R444
R443
R442
R441
R440
R438
R437
R436
R435
R434 R433
R432 R431R430
R429
R428 R427
R424 R423
R414R413
R412R411
R408R407R406
R405
R404
R403
R402
R401
D301
JR305
JR320
JR30
3
JR319JR308
JR31
8
JR307
JR301
JR30
9
JR302
JR31
1
JR304
JR310
JR31
7
JR30
6
BE
BE
1210
11
31
18
Q455
Q453
C356
C351
C350
C330
C329
C318C317
LP302
LP301
T001
C460
C456
C454
C453
C452
C410
C409
C402
C401
CN008
CN301
CN30
2
JW30
1
JW320
JW31
6
JW30
6
JW30
9
JW315
JW30
4
JW303
JW317
JW30
5
JW319
JW31
3
JW307
JW30
2
JW31
1
JW310
JW31
8
JW32
1
JW308
W302
W301JW312
BE
BE
B E
GS
GS
14 5
8
BE
BE
BE
145
8
BE
BE
BE
BE
BE
G S G S
1-872-797-
11
(11)
TC BOARDJ MAIN BOARDCN202
HRPE1REC/PB/
ERASE HEAD(DECK-B)
HP1(PB HEAD)(DECK-A)
D
D
D D
E
E
A
B
C
1 2 3 4
7-11. PRINTED WIRING BOARD TC Board : Uses unleaded solder. See page 27 for Circuit Boards Location.
(Page 37)
SemiconductorLocation
Ref. No. LocationD301 B-1D401 B-3
IC301 B-1IC401 B-3
Q301 C-1Q302 C-2Q303 C-2Q304 C-2Q305 C-3Q306 C-3Q401 C-3Q402 C-2Q403 C-2Q404 B-3Q405 B-3Q406 B-3Q407 C-1Q408 A-4Q409 A-3Q410 B-3Q453 B-4Q454 B-4Q455 B-4
-
HCD-GT22/GT44/GT55
3535HCD-GT22/GT44/GT55
7-12. SCHEMATIC DIAGRAM TC Board See page 36 for Waveforms
BOARD(2/4)
JMAIN
CN202
21
22
0.7
{0}
0.1
{6.6}0{6.8}
4
{4.2}
4
{4.2}
0.1
{6.6}
4{4.2}
0.1{6.6}
4
{4.2}
4
{4.2}
0.1{6.6}4
{4.2}
4
{4.2}
4
{4.2}
4
{4.2}3.3
{6.8}
3.3
{6.8}
0.1
{6.1}
0{4.8}(-10.5)
0{4.8}(-10.5)
0{4.8}(-10.5)
0{4.8}(-10.5)
0{4.2}(-3.6)
0{4.2}
4{4.2}
0.3(8.6)
0.3(5)
0.3(0.8)
0(0.2)
9.1(7.9)
(8.6)9.1
7.7{8}
0
4
{4.2}
4{4.2}
4
{4.2}
4
{4.2}
4
{4.2}
4{4.2}
7.7{8}
4{4.2}
4{4.2}
0
{6.8}(-10.5)0
{5.4}
4{4.2}
3.5(4.2)
(3.8)3.5
(4.2){3.8}
4{4.2}
(0.7)0
9.1(0)
0
3.1
4{4.2}
4{4.2}
4{4.2}
4
{4.2}
4
{4.2}
7.7
{8}3.5(4.2)
{3.8}
4{4.2}
4{4.2}4
{4.2}
0
0
{4.8}
(-10.5)
16V47
C452
1
2
3
4
5
6
7
8
9
10
11
11PCN008
NC
DECK-D-GND
O-BIAS
REC-MUTE
+9V
REC/PB SW
REC-L
REC-R
A-GND
PB-R
PB-L
50V0.1
C401
50V0.1
C402
0.1C430
47pC403
47pC404
10pC411
10pC412
0.01C417
0.01C418
470kR411
470kR412
220kR413
220kR414
150kR423
150kR424
220pC405
220pC406
220pC413
220pC414
6.8kR407
6.8kR408
50V10
C409
50V10C410
10R427
10R428
0.01C433
47kR442
10kR451
10R455
MC2838-T112-1D401
2SC3052EF-T1-LEFQ404
2SC3052EF-T1-LEFQ403
2SC3052EF-T1-LEFQ401
2SC3052EF-T1-LEFQ402
2SC3052EF-T1-LEFQ454
4.7kR453
4.7kR454
4.7R458
0.001C453
22kR457
6800pC454
0R459
0.01C456
2.2kR461
2.2kR462
1kR463
1kR464
470pC462
470pC461
0R487
22R449
22R450
22R456
2SC3052EF-T1-LEFQ408
47kR482
10kR481
0JR313
0R483
2.2kR484
100R349
10kR435
10kR436
2.2kR437
2.2kR438
100kR443
10kR444
50V10
C356
1kR431
47kR433
4700pC466
10kR429
4700pC416
47kR434
1kR432
10kR430
0R350
0R441
4.7kR307
4.7kR308
0.01C355
100R315
100
R31
6
47kR303
47kR304
1000
pC
303
1000pC304
220kR306
+
-
NJM4558V-TE2IC401(1/3)
3
21
+
-
NJM4558V-TE2IC401(2/3)
5
67
NJM4558V-TE2IC401(3/3)
8
POWER
4
GND
1000pC302
47kR301
47kR302
1000pC301
+
-
NJM14558V-TE2IC301(1/3)
3
2
1
+
-
NJM14558V-TE2IC301(2/3)
5
67
NJM14558V-TE2IC301(3/3)
8
POWER
4
GND
6800pC323
6800pC324
470R310
470R309
47R313
47R314
220R311
220R312
22kR319
22kR320
4.7kR323
4.7kR324
470kR317
470kR318
47pC315
47pC316
50V22
C318
50V22
C317220pC327
220pC328
16V220C350
0.1C353
1kR351
10V220C351
0.1C352
100R325
100R326
1
2
3
4
5
6
7
8
8PCN302
EH+
EH-
GND
REC-L
PB-L
PB-R
REC-R
GND
1
2
3
3PCN301
Lch
REF
Rch
UD
ZW-T
E17-
4.3B
D30
1
220kR305
0.1C354
0R486
100R321
100R322
6
2
1
3
5
4
T001
KTA1271Y-ATQ455
RT1N141C-TP-1Q409
RT1N431C-TP-1Q410
S
2SJ461Q301
S
2SJ461Q302
0JR315
0JR316
KTC3203Y-ATQ453
S
2SK2158-T2BQ303
S
2SK2158-T2BQ304
0.047C330
47kR401
47kR402
47kR404
47kR403
47kR405
47kR406
47kR452
10kR440
0.047C329
JW312
ISA1235AC1TP-1EFQ405
ISA1235AC1TP-1EFQ406
ISA1235AC1TP-1EFQ407
ISA1235AC1TP-1EFQ305
ISA1235AC1TP-1EFQ306
L-CH
R-CH
L-ch
R-ch
+
-
+
-
+
-
ERASE
TC BOARDA
101 2
J
H
B
1311
C
7 8
I
14
F
96
K
4 15 163
G
D
5 17
E
12
REC AMP
IC401
REC SWITCH
REC BIAS SWITCHQ454,455
REC CONTROL SWITCHQ409,410
BIAS OSC
MUTING
BIAS OSC
Q402,404
CONTROL SWITCHMUTING
MUTINGQ401,403
MUTING
MUTING
PB SWITCH(DECK-B)
PB SWITCH(DECK-A)
PB SWITCH(DECK-A)
PB SWITCH(DECK-B)
HRPE1(REC/PB/ERASE)
(DECK-B)
(PB)(DACK-A)
HP1
IC301PB AMP
DECK-A/B SELECTSWITCH,
REC-PB SELECTSWITCH
REC SWITCH
BIAS OSC
(Page 39)
-
HCD-GT22/GT44/GT55
3636HCD-GT22/GT44/GT55
Waveforms
CD Board
USB Board
TC Board
MAIN Board
PANEL Board
1 IC101 ia (RFi)(CD play mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p
2 IC101 wf (XO)(CD play mode)
1 V/DIV, 20 ns/DIV
59.1 ns3.3 Vp-p
qa IC901 ud (X2)
1 V/DIV, 50 ns/DIV
111 ns3.7 Vp-p
ws Q453 (Collector) (REC mode)
5 V/DIV, 20 s/DIV
30.4 s10 Vp-p
ea IC901 oa (XT2)
1 V/DIV, 20 s/DIV
30.4 s2 Vp-p
50 ns1.6 Vp-p
es IC901 of (X2)
1 V/DIV, 20 ns/DIV
ed IC901 ih (O-NJM3427A2-CLK)
2 V/DIV, 2 s/DIV
3.2 s3.3 Vp-p
800 ns3.2 Vp-p
ra IC701 rh (XTb)
2 V/DIV, 500 ns/DIV
wa Q453 (Base) (REC mode)
1 V/DIV, 20 s/DIV
30.4 s2.1 Vp-p
-
HCD-GT22/GT44/GT55
3737HCD-GT22/GT44/GT55
7-13. PRINTED WIRING BOARDS MAIN Section : Uses unleaded solder. See page 27 for Circuit Boards Location.
B
E
B E
B E
B E
B EB E
BE
BE
B E
BE
BE
B E
B E
B E
B E B E B E
B E
BEB
B
E
E
1 458
1
4
5
8
B E
1
10
5
6
40
31
20
21
30
1
10 11
148
17
14817
916
1 8
BE
BE
BE
G S
3031
50
51
8180
100
1
BE
B E
BE
91
13 1C363
R362
R361
JR120
R290
R289
R016
R014
R013 R010
R202R201
Q261
R001
D159
Q252
Q251
IC902
IC901
D911
Q046
Q045
Q044
Q041
D904
D903
D902
D901
IC303
IC302IC301
R991
R990
IC103
IC102
JR11
9
C950
JR118JR115
JR114
JR113
JR112
JR111
C179
JR110
C178
C177
C176
C175
C174
C173
C172
JR109
C171JR107
JR10
6
C362
JR105
R979
C361
JR104
R977
Q011
C166
C165
C164
C163
C160
R962
R961R960
C152
C151
C150
R959
R958R957
C149
C147
C146
C145
C912
C140
R949
R948
R947R946
R175
R945
C139
R944
R174
R173
R943
R942
R941
C905
R940
C904
R170
C903
C133
C902
R939
R169
R938
R937
R936
R166
R935
R165
C128
R164
R934
R933
C127
R163
R932
R162
R355
R161
R354
R160
C123
R353
C122
R352
C120
R929
R159
R928
R158
R927
R157
R926
R156
R925
R155
C117
R923
R153
R922
R346
R152
CL001
R921
R345
R151
R920
C114
R344
R343
R342R341
R919
R918
R148
R917
R147
R916R915
R145
R914
R144
R913
R143
R912
R142
R911
R141
R334R910
R140
R333
R332R330
R909
R139
R908
R138
R137
R136
R135
R328
R134
R327
R133
R326
R901
R325
R131
R324
R130
R323
R322
R321
R129
R128
R127
R126
R125
R124
R123
R122
R121
R120
R312
R311
R310
IC25
2
R119
IC251
R116
R309
R308
R114R3
07
R113
R306
R112R3
05R111
R304
R110R3
03
R302
R301
R108
R105
R101
Q913
Q912Q911
Q905
Q904
Q903
D037
Q902
D036
D031
C285
C281
Q121
C277 C276
C275
D214
C274
D213
C273
D212
D211
Q114 Q113
Q112
Q111
C268
Q303
C267
Q301
C264
D009D008 D007
D006
C064C063
R293
R292
R291
C254
C253
C252
C251
R286
R285
R281
R280
R279
R278
R277
R276
R274
R268
R267
R265
R264
R263
R262
R261
R068
R064
C027
R063 R256
C026
R255
R061
R254
R253
R252
R251
R057
R055R054
R053
R052
R051
R050
C010
R049
R048
R047R046R045
R043
R042
R234
R232
R231R230
R037
R036
R229
R035
R228
R034
R227
R033
R226
R032
R225
R224
R223
R222
R221
R217R216
R215 R214
Q274
R213
R212
Q272
R211
112 3
3 1
1210
11
12 10
11
13
1 13
13
1212
13
14 3
+-
BE
BE
BE
1 23
1 23
1 23
E B B E
B E
20211
2
12
26
27
21
2627
451
2
61
BE
BE
A001
JW33
7
JW33
5
C289
JW336
JW179 JW17
8JW17
7 JW
176
JW175
JW17
4
JW173
JW17
2
JW17
1JW
170
JW16
9
JW16
8
JW16
7
JW16
6JW165
JW16
4
JW16