service manual af-3

7/31/2019 Service Manual AF-3

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SERVICE MANUAL

AF-3


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GENERAL, MECHANICAL/ELECTRICAL

1. SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-1

2. COMPONENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . M-3

3. CROSS-SECTIONAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-4

4. DRIVE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-5

5. DESCRIPTION OF MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-6

6. DOCUMENT TAKE-UP/FEEDING MECHANISM

6-1. Document Take-Up Mechanism . . . . . . . . . . . . . . . . . . . . . . . M-7

6-2. Document Pressure System . . . . . . . . . . . . . . . . . . . . . . . . . . M-86-3. Document Detecting System. . . . . . . . . . . . . . . . . . . . . . . . . . M-9

7. DOCUMENT TRANSPORT MECHANISM

7-1. Document Transport Mechanism . . . . . . . . . . . . . . . . . . . . . . M-10

7-2. Operation and Control of Transport Drive Clutch CLU . . . . . M-12

7-3. Document Scale Retraction System . . . . . . . . . . . . . . . . . . . . M-13

7-4. Curling Taming Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . M-14

8. CONTROL OF MAIN MOTOR MOT. . . . . . . . . . . . . . . . . . . . . . . . M-15

9. MISCELLANEOUS

9-1. Document Size Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-16

9-2. AF-3 Raised/Lowered Position Detecting Mechanism . . . . . M-18

9-3. Document Exit Tray Raised/Lowered Position Detecting

Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-18

10. OPERATION AND CONTROL

10-1. Mixed 1-Sided Document Size Detection (Normal Speed)

Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-19

10-2. Fixed 1-Sided Document Size Detection (High Speed)

Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-22

CONTENTS

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DIP SWITCH and TEST MODES

1. FUNCTIONS OF THE DIP SWITCH . . . . . . . . . . . . . . . . . . . . . . . S-1

2. PAPER PASSAGE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-3

3. UNIT TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-4

DISASSEMBLY, REASSEMBLY AND ADJUSTMENT

1. DISASSEMBLY/REASSEMBLY

1-1. Removal of the Document Separator Pad . . . . . . . . . . . . . . . D-1

1-2. Removal of the Document Transport Belt . . . . . . . . . . . . . . . D-2

1-3. Removal of the Document Take-Up Assy . . . . . . . . . . . . . . . D-3

1-4. Removal of Document Take-Up Roller. . . . . . . . . . . . . . . . . . D-5

2. ADJUSTMENTS

2-1. Adjustment of Magnetic Catch Height . . . . . . . . . . . . . . . . . . D-7

2-2. Adjustment of the AF-3 Body Alignment in the Crosswise

Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-8

2-3. Adjustment of Document Guide Plate Reference Position . . D-9

2-4. Adjustment of Document Stop Position in the Mixed 1-SidedDocument Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-10

TROUBLESHOOTING

1. MISFEED/MALFUNCTION DETECTION. . . . . . . . . . . . . . . . . . . . T-1

2. MISFEED TROUBLESHOOTING PROCEDURES . . . . . . . . . . . . T-3

3. TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-8

x WIRING DIAGRAM/CIRCUIT DIAGRAM

x ELECTRICAL COMPONENT LAYOUT/CONNECTORLAYOUT/DESIGNATION AND FUNCTION OF SENSORS

x TIMING DIAGRAM

CONTENTS

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GENERAL,

MECHANICAL/ELECTRICAL


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1 SPECIFICATIONS

Name : Automatic Document Feeder AF3

Type : Document Take-Up: Take-up from bottom of stack,

Document Take-Up: U-turn feeding to Glass

Transport: Single-belt transport

Ejection: U-turn ejectingInstallation : Screw mount on copier

Type of Document : Plain paper 50 to 110g/m2 (13-1/4 to 29-1/4 lbs)

Detectable

Document Sizes

: Metric Area: A4C, A4L, A3L, B5C, B5L, B4L,

Metric Area: 8-1/2" 11"L, 8-1/4" 13"L

Inch Area: 8-1/2" 11"L, 8-1/2" 11"C,

Inch Area: 8-1/2" 14"L, 11" 17"L, 11" 15"L, A4L

Tray Capacity : Document Feed Tray: 30 sheets of paper weighing

Document Feed Tray: 80g/m2 (21-1/4 lbs)

Document Exit Tray: 30 sheets of paper weighingDocument Exit Tray: 80g/m2 (21-1/4 lbs)

Alignment : Aligned along the rear Document Guide Plate

Document Loading : Image facing up

Modes : Mixed 1-sided Document

Size Detection

(normal speed)

User selectable between

standard paper and

lightweight original

modes.

Fixed 1-sided Document

Size Detection

(high speed)Power Source : 24 VDC, 2A (supplied from copier)

Power Consumption : 48 watts max.

Dimensions : 590 (W) 515 (D) 95 (H) mm

(23-1/4 20-1/4 3-3/4 in.)

(excluding Document Exit Tray)

Weight : 10.0 kg (22 lbs) (including Document Exit Tray)

Document Exit Tray: 0.4 kg (0.9 lbs)

Operating

Environment

: Same as copier

Documents Which

cannot be Used

: The following documents, if used on the AF-3, may

cause problems.

Type of Document Possible Problem

Documents stapled or clipped together Improper take-up, torn document,

defective drive due to jamming clips

Documents glued together Improper take-up, torn document

Documents folded, torn or wrinkled Improper take-up, torn document

Curled documents Documents misfed due to dog-earedpages or skewed feeding.

Documents weighing less than 40 g/m2 Torn document

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Type of Document Possible Problem

Taped documents Improper take-up, multiple feed,

documents misfed due to skewed feeding

Documents pasted with cut paper Folded or torn paper

Documents slightly curled Dog-eared pages, edge riding on Scale,

improper ejection

Heat-sensitive paper for facsimile Folded leading edge, edge riding on

Scale, improper ejection

Coated documents Improper take-up, document sticking to

Glass

Translucent paper Improper take-up, poor transport

Paper just ejected from the copier Improper take-up, poor transport

Perforated documents Improper take-up due to burrs in holes

Document weighing 40 to 50g/m2 Folded leading edge

Damp, limp documents Folded leading edge

Documents of uneven surface Improper take-up

Documents written with pencil Dirty documents

Two-fold, Z-fold documents Distorted image

Documents other than paper of standardsize of 182-431.8 mm in length

Erroneous original size detection,dog-eared pages

Documents of a size other than

detectable size

Erroneous original size detection, lost

image

Documents Which Cannot

be Guaranteed to be Fed

: The following documents, if used on the

AF-3, may or may not cause problems.

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1. Hookup Cord2. Maintenance Cover3. Document Exit Tray

4. Document Exit Tray Extender5. Document Guide Plates6. Document Feed Tray7. Jam Release Lever8. Lock Release Lever9. Magnetic Catch Cover

10. Raised AF-3 detecting magnet11. Document Transport Belt12. Magnets

2 COMPONENT IDENTIFICATION

1 2 3

46

7

8

5

9

10

11

12

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1 2

7

34

5

8

9

10

11

6

12

1. Exit Rolls2. Exit Roller3. Document Take-Up Roller4. Document Detecting Sensor

(EMP SNS)5. Document Pressure Plate6. Document Separator Pad7. Size Sensor (SIZ SNS)

Registration Sensor (REG SNS)

8. Registration Roller9. Transport Belt Drive Roller

10. Transport Rolls11. Transport Belt Driven Roller12. Exit Sensor (EJECT SNS)

3 CROSS-SECTIONAL VIEW

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G5

G4B1 P1 P2

B2PG2

P3

G2

G3

G1

P4

B3

PG1

G7 G8

G6

4 DRIVE SYSTEM

Gears

Symbol No. of Teeth

G1 40

G2 18

G3 20

G4 18

G5 24

G6 20G7 30

G8 28

Belts

Symbol Length

B1 180 mm

B2 266 mm

B3 126 mm

Pulleys

Symbol No. of Teeth

P1 64/30

P2

P3 28

P4 30

Pulley Gear

Symbol No. of Teeth, Pulley No. of Teeth, Gear

PG1 30 27

PG2 60 34

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5 DESCRIPTION OF MODES

5-1. Mixed 1-Sided Document Size Detection (Normal-Speed) Mode

When in this mode, the AF-3 detects the size of the document each time adocument is taken up and fed in.

This means that, even if documents of different sizes are placed on the

Document Feed Tray, the copier feeds the copy paper of a size selectedaccording to the document size detected and the copying mode set on thecopier control panel.

5-2. Fixed 1-Sided Document Size Detection (High-Speed) Mode

When in this mode, the AF-3 detects the size of the first document only.The copier selects the copy paper size corresponding to this document sizeand uses copy paper of this size only. This provides for faster paper feedon the part of the copier.

Note: If a set of documents of mixed sizes are loaded in this mode, imageproblems including lost image could result.

5-3. Lightweight Original Mode (Metric Area)

This mode is intended for users who use lightweight originals. When in thismode, the Original Width Scale is operated and controlled differently, and adifferent document transport method is employed to protect the originalsfrom damage.

Note: In this mode, the document stops at a point 3 mm before the normal

stop position, which could cause the problem of lost image along theleading edge depending on the original.In the inch areas, the original is stopped at a point 01 mm from theend face of the Original Glass whether the AF-3 is in the normal orLightweight Original Mode.

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6 DOCUMENT TAKE-UP/FEEDING MECHANISM

6-1. Document Take-Up Mechanism

Document Separator Pad

Document Take-Up Roller

Registration Roller

At the rear of the unit

MOT

B1

P3

G2

PG2

G1P2

G3

B2

P1G4

CLU

The Document Take-Up mechanism takes up the bottom sheet of thedocuments placed on the Document Feed Tray and transports it to theRegistration Roller. The mechanism is driven by the Main Motor MOT.

* Operation

Note: For the following description, direction of rotation is as viewed from therear of the unit.

The MOT turns clockwise.

Driven by the MOT, Timing Belt B1 turns Pulley P1 clockwise.Since Transport Drive Clutch CLU is disengaged and Gear G4 is idling, theTransport Belt remains stationary.

The Pulley Gear PG2 turns Gear G1 counterclockwise.

The one-way bearing in theDocument Take-Up Roller islocked, allowing the Roller to turncounterclockwise to feed thedocument.

Note: The Document Separator Pad is pressed against the DocumentTake-Up roll to block the document(s) sticking to the desired document.

One-way bearing in Pulley P3 isunlocked and no driving force isapplied to Gears G2 and G3,keeping the Registration Rollerstationary.

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6-2. Document Pressure System

WGT SOL

Holder A

Holder B

EMP SNS

Document Detection Lever

Document Pressure Plate

Shaft

TensionSpring

DocumentWGT SOL

Holder A

Holder B

Shaft

The Document Pressure System presses the document set on theDocument Feed Tray against the Document Take-Up roller. The System isdriven by the Document Pressure Solenoid WGT SOL.

* Operation

WGT SOL is energized

Holder A is pulled toward the Solenoid.

Holder B pivots clockwise on the shaft.

The Document Pressure Plate is pressed against the Document Take-Uproller by a force equivalent to the tension of the Tension Spring.

* Control of WGT SOL

The WGT SOL is energized when CN4-11 on the PWB-A goes Low anddeenergized when it goes High.

4433C01MAA

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6-3. Document Detecting System

Document Detecting Sensor EMP SNS located at the document take-upport detects a document placed on the Document Feed Tray.

The System starts the document feeding operation as it detects adocument on the Document Feed Tray.

4433C02MAA

+

EMP SNS

Document

DocumentDetectingLever

DocumentTake-Up Roller

+

A document placed on the Tray No document on the Tray

The document raises the DocumentDetecting Lever, which blocks the beampath in the EMP SNS ( level output).

The Document Detecting Lever does notblock beam patch in the EMP SNS( level output).HL

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7 DOCUMENT TRANSPORT MECHANISM

7-1. Document Transport Mechanism

Registration Roller

Transport Belt

DocumentExit Roller

At the rear of the unit

CLUG5 PG1

G4P1

B3MOT

B1

P3

B2 G2G1

G3 P4

SC SOL

G8

G7

G6

The document transport mechanism functions to transport the document,which has been fed up to the Registration Roller by the document take-upmechanism, toward the exit end by means of the Document Transport Belt.

When engaged, the Transport Drive Clutch CLU transfers the drive forcefrom the Main Motor MOT to the Transport Belt and Document Exit Roller.

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* Operation

Note: For the following description, direction of rotation is as viewed from therear of the unit.

The MOT turns counterclockwise.

Timing Belt B1 turns counterclockwise.

Transport Drive Clutch CLU turnson.

Gear G4 turns counterclockwise.

Gear G5 turns Pulley Gear PG1counterclockwise.

Timing Belt B3 turns Pulley P4counterclockwise.

The Transport Belt is turned counterclockwise to feed the document towardthe exit end.

Transport Belt turns Gear G8 counterclockwise.

Gear G7 turns Gear G6 counterclockwise.

The one-way bearing in Gear G6 is locked, allowing the Exit Roller to turncounterclockwise and eject the document.

Note: During this process, Gear G1 turns clockwise, unlocking the one-waybearing in the Document Take-Up roller which then will not turn.

Pulley P3 is turnedcounterclockwise through PulleyP1 and Timing Belt B2.

The one-way bearing in P3 islocked, allowing Gear G2 to turnGear G3 clockwise.

The Registration Roller turnsclockwise and the document isadvanced to the Transport Belt.

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7-2. Operation and Control of Transport Drive Clutch CLU

* Operation

Clutch CLU is off: The rotor is turning together with the shaft but cannot drivethe disengaged armature and Gear G4.

Shaft

Rotor Armature

G4

Clutch CLU is on: Current flows through the rotor coil whose electromagnetic

force attracts the armature, transferring force from theshaft to Gear G4.

Coil

Rotor Armature

G4

* Control

Transport Drive Clutch CLU is energized when a Low signal is applied to pin2 of CN-5 of PWB-A, and deenergized when the pin goes High.

4433C03MAA

M-12


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7-3. Document Scale Retraction System

To eject the document, the Document Scale must retract to allow thedocument to pass over it.

The Scale Solenoid SC SOL operates the Document Scale Lever.

* Operation

While the document is placed:The solenoid SC SOL is off, allowing the Document Scale Push-Up Spring toraise the Document Scale top surface slightly higher than the top surface ofthe Original Glass.

While ejecting the document:The SC SOL is turned on and presses down the document scale by thedocument scale lever.

DocumentScale

Document Scale Push-Up Spring

OriginalGlass

SC SOL

Document ScaleLever

* Control

The SC SOL is deenergized as pin 7 of CN3 of PWB-A goes Low, andenergized as the pin level goes High.

4433C04MAA

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7-4. Curling Taming Mechanism

The Exit Roller has two flanges whose diameter are larger than that of theroller. In combination with the Exit Roll, the flanges keep the paper fromcurling.

Exit Roller Flange

DocumentExit Roll

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8 CONTROL OF MAIN MOTOR MOT

IC4 controls the Main Motor MOT. The signal from pins 12 and 13 of IC4determines the direction of motor rotation: reverse (during documentfeeding); forward (during document transporting or ejecting). When both

signals are High, the motor stops.

MOT IC4-12 IC4-13

Forward H L

Reverse L H

Stop H H

The speed of MOT is monitored by the pulse sensor CLK SNS whichcounts the pulses from the pulse disc mounted on the output shaft of themotor.

The sensor outpout signal is fed to pin 73 of IC4 which increases ordecreases the width of pulse output to pin 47.

As the width of pulse at pin 47 increases, the motor decreases in speed;as the pulse width decreases, the motor increases in speed.

High Speed Low Speed

H

L

H

L

4433C05MAA

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9 MISCELLANEOUS

9-1. Document Size Detection

The document size is detected by a combination of Width Detection andLength Detection.

* Width Detection The Size Sensor SIZE SNS detects the width of the document. The SIZE SNS is located at a point approx. 265 mm from the Rear

Document Guide Plate. An On signal from the SIZE SNS indicates that the width of the document

is 265 mm or more.

* Length Detection

A pulse disc attached to the output shaft of MOT is detected by PulseSensor CLK SNS.

The length of the document is detected by counting the number of pulsesoutput by CLK SNS from the time the motor starts to the time when theRegistration Sensor detects the trailing edge of the document.

The actual length is determined by subtracting a correction value A fromthe pulse count B.

Forward RotationMOT Stop

Backward Roution

REG SNS

No. of Pulses4433T51MCA

A B

Original Taken Up

Original Transported

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4433C06MAA

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9-2. AF-3 Raised/Lowered Position Detecting Mechanism

The AF-3 raised/lowered position detecting mechanism employs a magnetthat is installed on the AF-3.

The magnet actuates a reed switch when the AF-3 is lowered; anddeactuates the reed switch when the AF-3 is raised.

If a document is placed on the Document Feed Tray while the reed switchremains deactuated, the Closure Failure Indicator on the copier controlpanel lights up and the copier inhibits the initiation of a new copy cycle.

Raising and lowering the AF-3 serves to reset a misfeed condtion andallows for selecting a Test Mode operation.

9-3. Document Exit Tray Raised/Lowered Position Detecting Mechanism

The Document Exit Tray can be swung up to allow documents of a largesize (A3 or B4) to be loaded on the Document Feed Tray.

The magnet fitted on the Document Exit Tray actuates and deactuates theExit Tray Switch to let the copier know whether the Document Exit Tray isin the raised or lowered position.

If the Document Exit Tray is not in the lowered position after documentshave been loaded, the Closure Failure Indicator on the copier controlpanel lights up and the copier inhibits the initiation of a new copy cycle.

Magnet

Exit Tray Switch

Magnet

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10 OPERATION AND CONTROL

10-1. Mixed 1-Sided Document Size Detection (Normal Speed) Mode(When two A3L documents are loaded)

Start Key ON

Document Pressure Solenoid WGT SOL is energized, pressing DocumentPressure Plate against the document.

WGT SOL is deenergized.

The leading edge of the first document blocks the beam path of

Registration Sensor REG SNS whose output goes " ".

MOT stops.

Transport Drive Clutch CLU is energized.Scale Solenoid SC SOL is energized, pressing down Document Scale.

MOT turns forward, transporting the first document.

SC SOL is deenergizedand Document Scalereturns to its originalposition.

MOT stops.(The first document isplaced on the OriginalGlass.)

Main Motor MOT turns backward and thefirst document is taken up and fed.

After 42 pulses have been detected.

After 450 msAfter 200 ms

After 100 ms

After 150 ms

H

After 1,574pulses havebeen detected.

After 100 ms

After 1,713 pulseshave been detected.

The trailing edge of the firstdocument moves past REG SNS(goes ), clearing beam path.

MOT stops.

L

SC SOL is deenergized andDocument Scale returns to itsoriginal position.(The first document is placed onOriginal Glass.)

After 50 ms

InchVersion

M-19


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WGT SOL is energized.


The leading edge of the second document blocks beam of REG SNS(goes ).

MOT stops.

The set number of scanning cycles have been completed. The copiersends a document change signal.

CLU and SC SOL are energized.

MOT turns forward.(The first document is ejected and the second document is transported.)

SC SOL is deenergizedand Document Scalereturns to its originalposition.

MOT stops.(The second documentis placed on OriginalGlass.)

CLU is deenergized.

CLU is deenergized.

MOT turns backward, feeding the second

document.

100 ms after

After 450 ms After 200 ms

H


After 150 ms


After 100 ms

The leading edge ofthe first documentblocks the beam pathof Exit SensorEJECT SNS(goes ).HMOT stops.

SC SOL is deenergized and the Document Scalereturns to its original position.(The second document is placed on OriginalGlass.)


After 50 ms

After 100 ms

InchVersion

M-20


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MOT turns forward.(The first and second documents are ejected.)

The trailing edge of the first document moves past EJECT SNS (goes ),clearing the beam path.

The leading edge of the second document blocks the beam path of EJECTSENS ( ).

The trailing edge of the second document moves past EJECT SNS ( ),clearing the beam path.

MOT stops and CLU and SC SOL are deenergized.

End of operation

After 150 ms

After 100 ms

H

L

L

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10-2. Fixed 1-Sided Document Size Detection (High Speed) Mode(When three A4C documents are loaded)

Start Key ON

The Document Pressure Solenoid WGT SOL is energized, pressing

Document Pressure Plate against the document.


The leading edge of the first document blocks the beam path ofRegistration Sensor REG SNS whose output becomes " ".

MOT stops.

Transport Drive Clutch CLU is energized.Scale Solenoid SC SOL is energized, pressing down Document Scale.

MOT turns forward, transporting the first document.

MOT stops.

WGT SOL is energized.

MOT turns backward to feed thesecond document.

Main Motor MOT turns backward and thefirst document is taken up and fed.



After 100 ms

After 150 ms

H

After 876pulses havebeen detected.

After 100 ms

The trailing edge of the first document movespast REG SNS (turns ), clearing thebeam path.

L

CLU and SC SOL are deenergizedand the Document Scale returns

to its original position.

After 450 ms

After 200 ms


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The leading edge of the second document blocks the beam path of REGSNS (goes " ").

MOT stops.

MOT turns forward, advancing the second document only.(The leading edge of the second document moves closer to the trailing edgeof the first document.)

MOT stops.


MOT turns forward, transporting the first and second documents.

SC SOL is deenergized

and Document Scalereturns to its originalposition.

MOT stops.(The first document isplaced on OriginalGlass.)


After 100 ms


After 100 ms

After 150 ms


After 100 ms

The trailing edge ofthe second documentclears the beam path

of REG SNS(goes ).MOT stops.

SC SOL is deenergized and the Document Scalereturns to its original position.(The first document is placed on Original Glass.)


After 50 ms

H

L

InchVersion

M-23


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The CLU is deenergized and WGT SOL is energized.

MOT turns backward to feed the third document.

The leading edge of the third document blocks the beam path of REG SNS(goes ).

MOT stops.

MOT turns forward, advancing the third document only.

MOT stops.



MOT turns forward.(The first document is ejected and the second and third documents areadvanced.)

WGT SOL is

deenergized.

After 100 ms

H


After 100 ms


After 150 ms


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SC SOL is deenergized.

MOT stops(The second documentis placed on OriginalGlass.)

The CLU is deenergized.

The leading edge ofthe first documentblocks beam path of

the Exit Sensor(EJECT SNS, outputgoes " ").H

The trailing edge ofthe third documentclears the beam pathof REG SNS(goes ).


L

After 100 ms

After 100 ms

InchVersion

MOT stops.

SC SOL is deenergized.(The second document is placed on OriginalGlass.)


After 50 ms

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MOT turns forward.(The first and second documents are ejected and the third document isadvanced.)

SC SOL is deenergized.

MOT stops(The third document isplaced on OriginalGlass.)


The trailing edge ofthe first documentclears beam path ofEJECT SNS(goes ).

After 150 ms

The leading edge ofthe second document

blocks beam path ofEJECT SNS(goes ).H

L

After 100 ms

InchVersion

MOT stops.

SC SOL is deenergized.(The third document is placed on Original Glass.)


After 50 ms

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31/63

The CLU is deenergized.

The set number of scanning cycles have been completed. The copier

sends a document change signal.


MOT turns forward.(The second and third documents are ejected.)

The trailing edge of the second document clears beam path of EJECT SNS(goes ).

The leading edge of the third document blocks beam path of EJECT SNS(goes ).

The trailing edge of the third document clears beam path of EJECT SNS(goes ).

MOT stops and CLU and SC SOL are deenergized.

End of operation

After 100 ms

After 150 ms

After 100 ms

H

L

L

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DIP SWITCH AND

THE TEST MODES


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1 FUNCTIONS OF THE DIP SWITCH

DIP Switch SW1

PSW1

LED

* SW1-4 (setting is made effective when the copier Power Switch is turned on)

Determining the detectable document size.

ON Paper size 8-1/2" 11"L is rounded off and detected as A4L.

OFF Paper of 8-1/2" 11"L and A4L are discriminately detected.

Paper of 8-1/4" 13"L is also detected.

* SW1-5 (setting is made effective when the copier Power Switch is turned on)

ON Test Mode

OFF Normal Mode

* To change settings of SW1-1 to SW1-4 after the unit has been set into the test mode (SW1-5 at

ON position), open and close AF-3.* The position of SW1-1 to SW1-5 determines the type of test mode (both Paper Passage test and

Unit test).

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Paper Passage Test Mode

Blank: OFF

SW1 1 2 3 4 5

Mixed 1-Sided Document

Size Detection Mode

(Normal-Speed) Continuous

standard

paper passage

ON ON ON

Fixed 1-Sided Document

Size Detection Mode

(High-Speed)

ON


Size Detection Mode

(Normal-Speed) Continuous

lightweight

paper passage

ON ON ON ON


Size Detection Mode

(High-Speed)

ON ON


Size Detection Mode(Normal-Speed) Intermittent

standard

paper passage

ON ON ON ON


Size Detection Mode

(High-Speed)

ON ON


Size Detection Mode

(Normal-Speed) Intermittent

lightweight

paper passage

ON ON ON ON ON


Size Detection Mode

(High-Speed)

ON ON ON

Unit Test Mode

Blank: OFF

SW1 1 2 3 4 5

Paper pass sensor check

AF-3, Document Exit Tray raise/lower check ON

Main Motor Pulse Sensor (CLK SNS) check ON

Size Sensor (SIZE SNS) check ON ON

Main Motor (MOT) check ON

Document Pressure Solenoid (WGT SOL),

Transport Drive Clutch (CLU) and Scale

Soleoid (SC SOL) checks

ON ON

S-2


35/63

Press PSW1.

Turn off the Power Switch on the copier and set SW1-5 to ON position.

Place documents on the Document Feed Tray.

Turn on the copier Power Switch. (The AF-3 now recognizes that it

is now in the Test mode.)

Set SW1-1 to SW1-4 to the desired paper passage test. Open AF-3 and

then close it.

2 PAPER PASSAGE TEST

* To stop a continuous paper passage test (SW1-4: OFF), press PSW1. Pressing PSW1 again

allows the AF-3 to feed all documents out of it and to terminate the test.

* To continue the intermittent paper passage test (SW1-4: ON), press PSW1.

The AF-3 performs the selected paper passage test.

S-3


36/63

To select a different unit test at this point, simply set SW1-1 to SW1-3 to the desired test withoutturning off the Power Switch and then open and close the AF-3.

This completes the setting for the unit test.

3 UNIT TEST

Turn off the Power Switch on the copier and set SW1-5 to ON position.

Turn on the copier Power Switch.(The AF-3 now recognizes that it is now in the Test mode.)

Set SW1-1 to SW1-3 to the desired unit test. Open AF-3 and then close it.

x Unit Test Procedure and LED Indicator (LED 1 remains blinking during test.)

Paper Path Sensor Check

Insert a sheet of paper into Document

Take-Up Port and manually move

Document Detecting Lever to activate

and deactivate Document Detecting

Sensor EMP SNS.

LED5 turns on and off.

Remove the Document Exit Tray.

Using a flat-head screwdriver, move

Exit Sensor Lever to activate and

deactivate Exit Sensor.

LED5 remains off.



While pressing down Release Lever,insert a sheet of paper into Document

Take-Up Port to block and unblock

beam path of Registration Sensor

REG SNS.

54321

ON

LED1 LED2 LED3 LED4 LED5

S-4


37/63

Raise and lower the AF-3 to turn on

and off the reed switch on the copier.LED3 turns on and off.


Raise and lower the Document Exit

Tray to turn on and off Document Exit

Tray Sensor TRAY SNS.

54321

ON


Raise and Lower check of AF-3 and Document Exit Tray

54321

ON


Main Motor Pulse Sensor CLK SNS check

1. Check the status of LED5 (on or off).2. Raise the AF-3.

3. Open Jam Release Guide of Document Feed section. Slightly turn the Document Take-Up

3. Roller in reverse direction by hand to turn the pulse disc and to turn on and off CLK SNS.

4. Lower the AF-3.

5. Check that LED5 turns off if it was on at step 1; or turns on if it was off at step 1.

While pressing down the release

lever, insert a sheet of paper into

Document Take-Up Port to turn on

and off Size Sensor SIZE SNS.


54321

ON


Size Sensor SIZE SNS Check

S-5


38/63

54321

ON


Main Motor MOT Check

Repeatedly press PSW1 and check

that MOT changes operation mode as

shown in the table.

Pressing

Order

LED to be

LitMotor Operation

0 None Stop

1 LED5

Reverse

(Document Take-Up

roller rotates,

Transport Clutch

disengaged)

2 LED4 Stop

3 LED4, LED5

Forward

(Registration Roller

rotates, Transport

Clutch disengaged)

4 LED3 Stop

5 LED3, LED5

Forward

(Transport Belt

moves, Transport

Clutch engaged)

6 LED3, LED4 Stop

7 LEDs 3, 4, 5

Reverse

(Document Take-Up

Roller rotates,

Document Pressure

Solenoid energized)

* The 8th pressing returns to 0. The motor

operation mode will repeat in the same order as

PSW1 is pressed.

* Once the motor starts, it automatically stops

after approx. 30 seconds.

S-6


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54321

ON


Check of Document Pressure Solenoid (WGT SOL), Transport Drive Clutch (CLU) and Scale

Solenoid (SC SOL)

Repeatedly press PSW1 and check

that WGT SOL, CLU and SC SOL

change operation mode as shown in

the table.

Pressing

Order

LED to be

LitMotor Operation

0 None All stop

1 LED5 WGT SOL: ON

2 LED4 All stop

3 LED4, LED5 SC SOL: ON

4 LED3 All stop

5 LED3, LED5 CLU: ON

* The 6th pressing returns to 0. The operation will

repeat in the same order as PSW1 is pressed.

S-7


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DISASSEMBLY,

REASSEMBLY ANDADJUSTMENT

Precautions for Disassembly, Reassembly, and Adjustment

1. Before disassembling the AF-3, make sure that no power is being supplied

from the copier.

2. While power is being supplied to the AF-3, do not connect or disconnect print

jacks and connectors.

3. If the AF-3 is running with its covers removed, use care not to allow your

clothing to be caught in moving parts such as the timing belt.

4. Make it a rule not to operate the AF-3 with a component removed.

5. A toothed washer is used with the screw that secures the ground wire to

ensure positive conduction. Use the washer at reassembly.

6. To reassemble the AF-3, reverse the order of disassembly unless otherwise

specified.7. Do not loosen or remove the screw locked with red paint.

The red lock paint shows that the part secured with the screw must be

adjusted and assembled at the factory only and cannot be included in field

service items.

Purpose of Red Paint

8. When working on the AF-3 or storing it for a long period, place it on a flat

surface to keep the cover flat.


41/63

1-1. Removal of the Document Separator Pad1. Using a flat-head screwdriver, release the cover lock

and remove the cover.

4433D002AA

Document Separator

Pad Pressure Plate

2. Remove the screw that secures the Document

Separator Pad Pressure Plate and remove it.

3. Remove the springs and then the Document Separator

Pad.

Ribs

Frame

Mylar

Projections

Precautions on Reinstallation of the Document Separator

Pad

a. Make sure that the projections of the Document

Separator Pad hold the frame.

b. The springs are engaged with ribs of the Document

Separator Pad Pressure Plate.

c. Do not damage or fold the mylar.

1 DISASSEMBLY/REASSEMBLY

D-1


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1-2. Removal of the Document Transport Belt

Stopper

1. Slightly open the AF-3. Pushing the stoppers by hand

to unlock them, completely open the AF-3.

C-clip

2. Snap off the C-clip that secures the Transport Belt

Roller Assy.

Timing Belt

3. Pull the Transport Belt Roller Assy toward you. While

removing the Timing Belt, pull up the upper end of the

Transport Belt Roller Assy.

4. Remove 2 screws and fold the Transport Belt Driven

Roller section to the inside.

5. Remove the Document Transport Belt.

D-2


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Precautions on Reinstallation of the Document Transport

Belt

Make sure that both edges of the Transport Belt slip into

the Belt Guides (Upper and Lower).

Make sure that the Transport Belt does not ride on the

C-clip.

1. Slightly open the AF-3. Pushing the stoppers by hand

to unlock them, completely open the AF-3.

2. Following steps in sect. 1-2 above, remove the

Transport Belt Roller Assy.

1-3. Removal of the Document Take-Up Assy

3. Remove two shoulder screws and then the AF-3.

4. Remove 5 screws and then the PWB cover.

D-3


44/63

5. Remove the screw and cover (small).

Tapping Screw (8 mm)

Plastic Tapping Screw (8 mm)

6. Remove 9 screws.

Document Take-Up Assy

4433D012AA

Hinge

Assy

7. Slightly lift up the Document Take-Up Assy and

remove the Hinge Assy.

Document Take-Up Assy

PWB-A

8. Disconnect 3 connectors on PWB-A. Remove the

Document Take-Up Assy.

"MAXIMUM

8 mm"8 mm

12 mmOne of the plastic tapping screws that hold the Hinge

Assy is 8 mm long. Set this screw into the hole under

which "MAXIMUM 8 mm" is marked.

NOTE

D-4


45/63

1-4. Removal of Document Take-Up Roller

Guide

Plate

1. Remove the Document Take-Up Assy.

2. Remove 3 screws and the Guide Plate.

Pin3. Pull 13 pins off the Shaft.

Bushings

4. Remove 2 E-rings. Release the Jam Release Lever.

Slide the Bushings inward and remove them from the

Frame.

Motor

Shaft

5. While sliding the Shaft toward the Motor, tilt the Shaft.

6. Pull the Document Take-Up Roller and Collar off the

Shaft.

D-5


46/63

Blue

Motor side

Precautions on Reinstallation of the Document Take-Up

Roller and Collar

a. Be sure to reinstall the Document Take-Up Roller and

Collar with the Jam Release Lever unlocked.

b. When installing the Document Take-Up Roller, make

sure that its One-way bearing (blue) is on the motor

side.

c. Be sure to fit the collar in place with correct orientation.

D-6


47/63

2-1. Adjustment of Magnetic Catch HeightRequirement: There should be 0 to 0.5 mm clearance between the Spacers and Original

Glass.

2 ADJUSTMENTS

Magnetic Catch Cover 1. Open the AF-3.

2. Push in the Lock Claw with a screwdriver and remove

the Magnetic Catch Cover.

3. Lower the AF-3 and loosen the Magnetic Catch

adjusting screws.

OK X

4426U037AA

4. Press the AF-3 down and check that each Magnet

makes positive contact with its Metal Plate.

5. Make sure that there is a 0-0.5 mm clearance between

the Spacers and Original Glass. Then, tighten the

Magnet adjusting screws.

D-7


48/63

2-2. Adjustment of the AF-3 Body Alignment in the Crosswise DirectionRequirement: The document transported to the Original Glass should have 1 mm or

less tilt with reference to the Original Width Scale.

8. Slightly close the AF-3. Press the stoppers (L and R)

by hand to release the lock and completely open the

AF-3.

1. Wedge a tightly folded piece of paper under the scale

restraint at the rear side to hold down the Original

Scale.

2. Move the Original Positioning Plate to the rear and

tape it so that it will not return to its original position.

3. Place a sheet of paper on the Document Feed Tray.

4. Make the control panel settings for the Auto Paper

Select Mode, 1-sided original.

5. Press the Start Key and immediately press the Stop

Key.

a

b

6. Gently raise the AF-3.

7. Check the document to see if it is tilted like "a" or "b"

shown.

Make sure that the paper wedge is clear of the "w"

mark.

NOTE

The document should not be tilted in either direction.

NOTE

D-8


49/63

9. Loosen 3 screws that secure the Right Hinge.

10. If the document is tilted like "a", shift the AF-3 to the

rear, if the document is tilted like "b", shift the AF-3 to

the front.

11. Tighten 3 screws that have been loosened in step 9.



Scale.



2-3. Adjustment of Document Guide Plate Reference PositionRequirement: Should be 0 1 mm or less to the rear of the end face of the Original

Positioning Plate.



Select and 1-sided original mode.

5. Press the Start Key and, immediately press the Stop

Key.


7. Holding the Original Positioning Plate in position with

your finger, peel off the tape and then slowly bring the

Plate back to the original position.

After this adjustment has been made, be sure to

perform the Adjustment of Document Guide Plate

Reference Position and Adjustment of Document

Stop Position.

NOTE


mark.

NOTE

D-9


50/63

E

F

8. Check the document to see how many mm its rear

edge deviates in the "E" or "F" direction with reference

to the end face of the Original Positioning Plate.

To the rear

To the front

9. Move the Rear Document Guide Plate toward the front

or rear to offset the amount of deviation checked in

step 8.



Scale.




mark.

NOTE

2-4. Adjustment of Document Stop Position in the Mixed 1-SidedDocument Size Detection (Normal-Speed) and Fixed 1-SidedDocument Size Detection (High-Speed) ModeRequirement: The leading edge of the document should be 3 to 5 mm (Metric Area) or 0

1 mm (Inch Area) to the left beyond the Original Width Scale.

D-10


51/63



Select Mode, Mixed or Fixed Document Size

Detection mode.

5. Press the Start Key and, immediately press the Stop

Key.


7. Check the document to see how many mm its left

edge deviates in the "C" or "D" direction with reference

to the left end face of the Original Glass.

8. Set the copier to "31" (1-Sided Original Stop Position

Adjustment Mode) of the Tech. Rep. Choice Mode.

9. Referring to the table on p. D-12, adjust the document

stop position as necessary.

This adjustment must be followed by sect. 2-3

Adjustment of Document Guide Plate Reference

Position.

NOTE

D-11


52/63

1) Press the Stop Key.

2) Press "0".

3) Press the Stop Key.

4) Press "1".5) Press "2".

6) Press "3" and "1".

7) Press the Start Key.

8) Press the Clear Key to clear the current setting.

9) Press "5" and "3".

10) Press the Start Key.

11) Press the Panel Reset Key twice.

12) This changes the choice setting (shift).

These are the steps to set the copier intoCH31 of the Tech. Rep. Choice Mode.

Example: The leading edge of the document deviates 3 mm in the "C"

direction with reference to the left end face of the Original Glass

(initial setting: 0) in the Mixed 1-Sided Document Size Detection

(Normal-Speed) Mode.

Multi-Copy Key Choice Setting (Shift: mm)

43 7

Moves in the "C" direction.

44 6

45 5

46 4

47 3

48 2

49 1

50 0 Initial Setting

51 1

Moves in the "D" direction.

52 2

53 3

54 4

55 5

56 6

57 7

58 8

D-12


53/63

TROUBLESHOOTING

General Precautions

1. When servicing the AF-3 with its covers removed, use utmost care to prevent

your hands, clothing, and tools from being caught in revolving parts.

2. Before attempting to replace parts and unplugging connectors, make sure that

no power is being supplied from the copier.

3. When creating a closed circuit and measuring a voltage across connector pins

specified in the text, be sure to use the green wire (GND).

4. Keep all disassembled parts in good order and keep tools under control so that

none will be lost or damaged.

Reading the Troubleshooting Charts

1. If a component on a PWB or any other functional unit including a motor is

defective, the text only instructs you to replace the whole PWB or functional

unit and does not give troubleshooting procedure applicable within the

defective unit.

2. All troubleshooting procedures contained herein assume that there are no

breaks in the harnesses and all connectors are plugged into the right positions.


54/63

1 MISFEED/MALFUNCTION DETECTION

When a document misfeed or malfunction condition is detected while the AF-3 is operating, the

possible cause is indicated by blinking LEDs on PWB-A.

LED


NOTE: LED1 remains blinking at all times.

1) LED indications and Detection Timing for Particular Misfeed Condition.

: Blinking O: Off

Misfeed Description Detection TimingLED

1

LED

2

LED

3

LED

4

LED

5

O O O

Document not reaching

Registration Sensor REG

SNS

Registration Sensor REG SNS is not

activated (beam not blocked, )

within 1,000 ms after Take-Up Motor

MOT has been turned on.

O O O

Document staying at

Registration Sensor REG

SNS

Registration Sensor REG SNS

remains activated (beam blocked,

) for 2,250 pulses.

REG SNS beam is blocked when

Document Pressure Solenoid WGT

SOL is on.

O O

Document not reaching Exit

Sensor EJECT SNS

The leading edge of the document

does not advance enough to block

the beam of EJECT SNS after it has

moved for 2,413 pulses from the

Registration Roller.

O O O

Document staying at Exit

Sensor EJECT SNS

EJECT SNS remains activated

(beam blocked) for 2,250 pulses.

The document does not unblock the

beam of EJECT SNS after it has

moved for 2,413 pulses from the

Registration Roller after theDocument Change signal.

L

H

T-1


55/63

: Blinking O: Off


1

LED

2

LED

3

LED

4

LED

5

O O O

Document pulled out The document placed on Document

Feed Tray is pulled out immediately

after the Start Key has been turned

on.

O O

At document loading Any of Registration Sensor, Size

Sensor and Exit Sensor is in the

activated state when the documents

are placed on the Document Feed

Tray.

O O

Document left on Glass Exit Sensor is activated immediately

after Start Key is turned on with

documents placed on Document Feed

Tray.

NOTE: The timer settings in the table above are for the normal mode. A longer timer setting resultsin the lightweight original mode.

2) LED Indications and Detection Timing for Malfunction Conditions

: Blinking O: Off


1

LED

2

LED

3

LED

4

LED

5

O O

Main Motor MOT malfunction MOT locks up.

Pulses are not applied to IC4A-73

on PWB-A at 500 ms intervals after

MOT has been energized.

T-2


56/63

2 MISFEED TROUBLESHOOTING PROCEDURES

Check for blinking LEDs. Identify the symptom by consulting the table below .

Perform the action instructed in the table.

1) Document not reaching Registration Sensor REG SNS

SymptomStep

No.Check Result Action

The document is not

taken up at all.1

Does the document being

used meet the

specifications for

guaranteed feeding?

NO

Instruct the user to use

documents that meet the

specifications for

guaranteed feeding.

The document stops

before REG SNS. 2

Is the capacity of the

Document Feed Tray

being exceeded?

YESInstruct the user not to

exceed Tray capacity.

3

Are the Document

Take-Up roller or

Document Separator Pad

deformed or worn, or dirty

with paper dust?

YESClean or replace the

defective Roller or Pad.

Document Pressure Pad

is not pressing the

document. 1

Does the Document

Pressure Solenoid WGT

SOL operate properlywhen checked according

to the Unit Test S-4?

YES Replace PWB-A.

NO Replace WGT SOL.

The Registration Roller

is clogged with the

document.1

Does REG SNS operate

properly when checked

according to the Unit Test

S-4?

YES Replace PWB-A.

NO Go to step 2.

2

Does the voltage across

CN4A-2 on PWB-A and

GND change from 0V to 5

VDC?

YES Replace PWB-A.

NO Replace REG SNS.

The copier control panel

indicates ADF misfeed

when the Start Key is

pressed with no

document placed on the

Document Feed Tray.

1

Is the motion of the

Document Detecting

Lever abnormal?

YES

Correct or replace the

Document Detecting

Lever.

2

Does the Document

Detecting Sensor EMP

SNS operate properly

when checked according


YES Replace PWB-A.

NO Go to step 3.

3


CN4A-5 on PWB-A andGND change from 5 VDC

to 0 V?

YES Replace PWB-A.

NO Replace EMP SNS.


T-3


57/63

SymptomStep

No. Check Result Action

The trailing edge of the

document has not

moved past REG SNS.1


used meet the

specifications for

guaranteed feeding?

NO



specifications for

guaranteed feeding.

The leading edge or the

middle portion of the

document is folded, the

trailing edge has not yet

passed REG SNS.

2Is the Registration Roller

deformed, worn, or dirty?YES

Clean or replace the

Registration Roller.

3

Is the Misfeed Release

Guide Plate between the

Registration Roller and

Transportation Beltdefective?

YESCorrect or replace the

defective Guide Plate.

4Is the Transportation Belt

deformed, worn or dirty?YES


Transport Belt.

5 Is the Glass dirty? YESClean or replace the

Glass.

6

Does the main motor

MOT drive the

Transportation Belt when

checked according to the

Unit test S-6?

NO Go to step 7.

7

Does the Transport Drive

Clutch CLU operate

correctly when checked


S-7?

YES Replace PWB-A.

NO Replace CLU.

Multiple feed

1


used meet the

specifications for

guaranteed feeding?

NO



specifications for

guaranteed feeding.

2Is Roller or DocumentSeparator Pad deformed,

worn, or dirty with paper

dust?

YESClean or replace the

defective Roller or Pad.

2) Document staying at Registration Sensor REG SNS


T-4


58/63

3) Document not reaching Eject Sensor EJECT SNS

SymptomStep


The document is caught

by the Original Width

Scale.1


used meet the

specifications for

guaranteed feeding?

NO



specifications for

guaranteed feeding.

The document is

between the Original

Glass and Original

Width Scale.

2

Is the Document

Transport Belt deformed,

worn, or dirty?

YES Clean or replace the Belt.

The document stops

before EJECT SNS.


Glass.

4

Is the Original Width

Scale returned to the

original position by the

tension of the spring when

it is pressed and then

released?

NO

Check the spring under

the Original Width Scale

for correct installation, or

replace it.

5

Does the Scale Solenoid

SC SOL function correctly

when checked according


YES Replace PWB-A.

NO Replace SC SOL.

The document stops at

EJECT SNS.1

Is the Exit Sensor Lever

defective?YES


Lever.

2

Does EJECT SNS fuction

correctly when checked


S-4?

YES Replace PWB-A.

NO Go to step 3.

3

Using a flat-head screw

driver, press down the

Exit Sensor Lever to block

the beam in EJECT

SENS. Does the voltageacross CN3A-2 on

PWB-A and GND change

from 0 V to 5 VDC?

YES Replace PWB-A.

NO Replace EJECT SNS.


T-5


59/63

SymptomStep


The trailing edge of the

document has not

moved past EJECT

SNS.

1


used meet the

specifications for

guaranteed feeding?

NO



specifications for

guaranteed feeding.

2Is the Exit Roller

deformed, worn or dirty?YES


Roller.

3Is the Transport Belt

deformed, worn or dirty?YES Clean or replace the Belt.


Glass.

4) Document Staying at Exit Sensor EJECT SNS


T-6


60/63

SymptomStep


ADF Jam Failure is

indicated on the copier

control panel.

1Is a document left on the

AF-3?YES Remove the document.

2

Does SIZE SNS correctly

operate when checked


S-5?

YES Go to step 4.

NO Go to step 3.

3


CN4A-8 on PWB-A and

GND change from 0 V to

5 VDC when SIZE SNS is

blocked by a sheet of

paper?

YES Replace PWB-A.

NO Replace SIZE SNS.

4

Does REG SNS correctly

operate when checked


S-4?

YES Go to step 6.

NO Go to step 5.

5


CN4A-2 on PWB-A and

GND change from 0 V to

5 VDC when REG SNS isblocked by a sheet of

paper?

YES Replace PWB-A.

NO Replace REG SNS.

6Does the Exit Sensor

Lever operate correctly?NO


Lever.

7

Does EJECT SNS

correctly operate when

checked according to the

Unit Test S-4?

YES Replace PWB-A.

NO Go to step 8.

8

Using a flat-head screw

driver, press down theExit Sensor Lever to block

the beam in EJECT SENS

(H). Does the voltage

across CN3A-2 on

PWB-A and GND change

from 0 V to 5 VDC?

YES Replace PWB-A.

NO Replace EJECT SNS.

5) At document loading


T-7


61/63

3 TROUBLESHOOTING

1) Main Motor MOT

Step

No.Check Item Result Action

1

Does the Main Motor Pulse Sensor

CLK SNS correctly operate when

checked according to the Unit Test

S-5?

YES Go to step 2.

NOReplace CLK SNS.

2

Does MOT correctly operate when

checked according to the Unit Test

S-6?

YES Replace PWB-A.

NO Replace MOT.


4433C01TAA

T-8


62/63

x DESIGNATION AND FUNCTION OF SENSORS

Symbol Name Signal Check Point Function

EMP SNS Document

Detecting Sensor

Paper present:

Paper not

present:

CN4A-5 and GND Checks the

Document Feed

Tray for presence

of document.

REG SNS Registration Sensor Paper present:

Paper not

present:

CN4A-2 and GND Checks whether the

document is fed or

clogging.

SIZU SNS Size Sensor Paper present:

Paper not

present:

CN4A-8 and GND Determines the

width of the

document.

CLK SNS Main Motor Pulse

Sensor

Beam blocked:

Beam unblocked:

CN5A-4 and GND Detects pulses of

from the Main

Motor.

EJECT

SNS

Document Exit

Sensor

Paper present:

Paper not

present:


document is

ejected or clogging.

TRAY SNS Exit Tray Sensor Paper placed:

Tray is open:


Tray is open or

closed.

Note: All check points (connectors) are located on PWB-A.

L

H

H

L

H

H

L

L

L

H

H

L

T-9


63/63

Copyright1994 MINOLTA CAMERA CO., LTD

Printed in Japan

Use of this manual should

be strictly supervised to