STAGEPAS 300

1

SERVICE MANUAL

PA 011775

CONTENTS（目次）

SPECIFICATIONS（総合仕様） ............................................... 3PANEL LAYOUT（パネルレイアウト） .................................. 4DIMENSIONS（寸法図）......................................................... 4CIRCUIT BOARD LAYOUT（ユニットレイアウト） .............. 5DISASSEMBLY PROCEDURE（分解手順） ........................... 6IC BLOCK DIAGRAM（ICブロック図）................................. 15CIRCUIT BOARDS（シート基板図）..................................... 16INSPECTIONS（検査） ......................................................... 23TROUBLE SHOOTING（トラブルシューティング）............ 26PARTS LISTBLOCK DIAGRAM（ブロックダイアグラム）CIRCUIT DIAGRAM（回路図）

Copyright (c) Yamaha Corporation. All rights reserved. PDF-K9611 ’05.04

HAMAMATSU, JAPAN20050321-86100

Speaker SpeakerMixer

STAGEPAS 300

2

WARNINGComponents having special characteristics are marked and must be replaced with parts having specification equal to thoseoriginally installed.

IMPORTANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basicservice procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users,and have therefore not been restated.

WARNING : Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury,destruction of expensive components and failure of the product to perform as specified. For these reasons, we adviseall Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or theappointed service representative.

IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certification,recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.

The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and servicedepartments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and changes inspecification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact thedistributor’s Service Division.

WARNING : Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulatedby grounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus.)

IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.

WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (Where applicable)components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to causecancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.

This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd. (3 wires)

IMPORTANT NOTICE FOR THE UNITED KINGDOMConnecting the Plug and Cord

WARNING: THIS APPARATUS MUST BE EARTHEDIMPORTANT. The wires in this mains lead are coloured in accordance with the following code:GREEN-AND-YELLOWBLUEBROWN

: EARTH: NEUTRAL: LIVE

As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug proceed as follows:The wire which is coloured GREEN-and-YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or colored GREEN or GREEN-and-YELLOW.The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.

印の部品は、安全を維持するために重要な部品です。交換する場合は、安全のために必ず指定の部品をご使用ください。

STAGEPAS 300

3

SPECIFICATIONS

General SpecificationsMaximum Output Power

150 W+150 W/6 Ω @10 % THD at 1 kHz (SPEAKER L/R)

100 W+100 W/6 Ω @1 % THD at 1 kHz (SPEAKER L/R)

Frequency Response-3 dB, 0 dB, +1 dB @20 Hz–20 kHz, 1 W Output/6 Ω (Without

MUSIC/SPEECH, EQ and SP EQ Circuit) (SPEAKER L/R)

-3 dB, 0 dB, +1 dB @20 Hz–20 kHz, +4 dBu 10 kΩ Load

[MUSIC/SPEECH]switch=MUSIC (MONITOR OUT, REC OUT)

Total Harmonic Distortion1 % @1 kHz, 50 W Output Power (SPEAKER L/R)

0.5 % @20 Hz–20 kHz, +14 dBu 10 kΩ (MONITOR OUT, REC OUT)

Hum & Noise (20 Hz–20 kHz, Rs=150 Ω, MIC/LINE switch=MIC)-65 dBu Residual output noise (SPEAKER L/R)

-90 dBu Residual output noise (MONITOR OUT, REC OUT)

-67 dBu @MONITOR OUT control & one CH LEVEL control

at nomunal level (CH1–4)(MONITOR OUT)

Crosstalk (1 kHz)-70 dB between input channels

Weight18 kg (mixer and two speakers)

Power Consumption70 W

Stereo Input Channel Equalization:Shelving turnover/rolloff frequency:

3 dB before maximum cut or boost.

±15 dB

HIGH 10 kHz shelving

LOW 100 Hz shelving

AccessoriesPower Cable, Speaker Cable, Owner’s Manual

OptionMicrophone

SpeakerEnclosure

Bass-reflex type

Speaker UnitLF: 8" (20 cm) Cone

HF: 1" (2.54 cm) Compression Driver

Cross Over Frequency4 kHz

Frequency Range55 Hz–20 kHz

Maximum Output Level112 dB (1 m)

一般仕様最大出力≧150 W+150 W/6 Ω @10 % THD at 1 kHz (SPEAKER L/R)≧100 W+100 W/6 Ω @1 % THD at 1 kHz (SPEAKER L/R)

周波数特性-3 dB, 0 dB, +1 dB @20 Hz～20 kHz, 1 W 出力/6 Ω(MUSIC/SPEECH, EQ and SP EQ Circuit を除く) (SPEAKER L/R)-3 dB, 0 dB, +1 dB @20 Hz～20 kHz, +4 dBu 10 kΩ Load[MUSIC/SPEECH]スイッチ=MUSIC (MONITOR OUT, REC OUT)

全高調波歪率≦1 % @1 kHz, 50W Output Power (SPEAKER L/R)≦0.5 % @20 Hzー20 kHz, +14 dBu 10 kΩ (MONITOR OUT, REC OUT)

ハム&ノイズ (20 Hz～ 20 kHz, Rs=150 Ω , MIC/LINE スイッチ=MIC)≦-65 dBu 残留ノイズ (SPEAKER L/R)≦-90 dBu 残留ノイズ (MONITOR OUT, REC OUT)≦-67 dBu @MONITOR OUTコントロール&1チャンネルコントロールノミナルレベル (CH1～4)(MONITOR OUT)

クロストーク (1 kHz)≦-70 dB 入出力間

質量18 kg (スピーカー2台＋ミキサー)

消費電力70 W

入力チャンネルイコライザー特性シェルビングタイプのターンオーバー/ロールオフ周波数:

最大可変幅(±15 dB)に対し3 dB下がったポイントHIGH 10 kHz シェルビングタイプLOW 100 Hz シェルビングタイプ

付属品電源ケーブル、スピーカーケーブル、取扱説明書、保証書

オプションマイク

スピーカーエンクロージャーバスレフ型

スピーカーユニットLF: 8" (20 cm) コーンHF: 1" (2.54 cm) コンプレッションドライバー

クロスオーバー周波数4 kHz

再生周波数帯域55 Hz～20 kHz

最大出力音圧レベル112 dB (軸上1 m)

総合仕様

STAGEPAS 300

4

PANEL LAYOUT（パネルレイアウト）

DIMENSIONS（寸法図）

160

290

255

455.

5

275

137

2-M8x25

120

MS

C

23

1

MS

C

23

1

MS

C

23

1

MS

C

23

1

96.3

Unit: mm（単位）

Speaker（スピーカー部）

Mixer（ミキサー部）

qw

e

r

t

i

!5 !1

!7

!4

!6

y

!3

!2

!0ou

q [POWER] switch ([POWER]スイッチ)w [AC IN] jack ([AC IN]端子)e [SPEAKER L/R] jacks ([SPEAKER L/R]端子(付属のスピーカー用))

r [REC OUT L/R] jacks ([REC OUT L/R]端子)t [MONITOR OUT L(MONO)/R] jacks ([MONITOR OUT L(MONO)/R]端子)

y Channel input jacks (CH 1 to 4) (チャンネル入力端子 (CH 1から4))

u Stereo channel input jacks (CH 5/6, 7/8) (ステレオチャンネル入力端子(CH 5/6、7/8))

i [MIC/LINE] switches ([MIC/LINE]スイッチ)o Equalizer [HIGH]/[LOW] (EQ(イコライザー))!0 [REVERB] switches ([REVERB]スイッチ)!1 [REVERB] control ([REVERB]コントロール)!2 [LEVEL] control ([LEVEL]コントロール)!3 [MASTER LEVEL] control ([MASTER LEVEL]コントロール)

!4 [SPEECH/MUSIC] switch ([SPEECH/MUSIC]スイッチ)

!5 [MONITOR OUT] control ([MONITOR OUT]コントロール)

!6 [LEVEL] meter ([LEVEL]メーター)!7 [POWER] indicator ([POWER]インジケーター)

STAGEPAS 300

5

CIRCUIT BOARD LAYOUT（ユニットレイアウト）

NE

TW

OR

K2

NE

TW

OR

K1

or

NE

TW

OR

K2

NE

TW

OR

K1

orP

OW

ER

PO

WE

R

FIL

TE

R

INP

UT

JAC

K2

JAC

K1A

JAC

K1B

or

FIL

TE

R

VR

VR

Spe

aker

LF

<W

oofe

r>（スピーカ

LF <ウーファー

>）

Pow

er a

mpl

ifier

uni

t（パワーアンプユニット）

Pow

er a

mpl

ifier

uni

t（パワーアンプユニット）

Spe

aker

HF

<T

wee

ter>

（スピーカ

HF

<ツィーター

>）

Fro

nt

view

Rig

ht

sid

e vi

ewR

ear

view

15

STAGEPAS 300

IC BLOCK DIAGRAM

NJM2068M-D TE1 (AAX62750)Dual Operational AmplifierFILTER:

INPUT:

VR:

1

2

3

4 -V

8

7

6

5

Output A +V

Non-InvertingInput A

-DC Voltage Supply

+DC VoltageSupply

Output B

InvertingInput BNon-InvertingInput B

InvertingInput A +-

+ -

M65850FP (AAX62760)Digital EchoFILTER: IC602

2 3 4 5 6 8 15

1

16

13

14 7 12 11 10 9

1

2

3

4

5

6

7

NC

NC

LPF1 IN

LPF1 IN

LPF1 OUT

LPF1 OUT

OP1 OUT

OP1 OUT

CC1

CC1

CC2

CC2

GND

GND

16

15

14

13

12

11

8

NC

NC

Vcc

Vcc

CLOCK

CLOCK

REF

REF

OP2 OUT

OP2 OUT

OP2 IN

OP2 IN

LPF2 IN

LPF2 IN

LPF2 OUT

LPF2 OUT

7

8

10

9

OP1 IN

OP1 IN

A / D

D / A

LPF1

LPF2

MO

MIDO0D1

RESET

CLOCK DO1

MAIN CONTROLAUTORESET

1/2 Vcc

OSCILLATOR

20KbitSRAM

IN --

IN +

OUT GND

Vref D7

R7

5.83 kΩ

R6

4.12 kΩ

R1

1 kΩ

D6

--

+

12, 11, 10, 9

D1Vcc Rch

COM1

--

+

COM6

--

+

COM7

LB1407-E LF (AAX68710)AC/DC Voltage Level Meter

VR: IC604

23

4

5

6

81 1314

7

1

2

3

4

5

6

7

14

13

12

11

10

9

87 8

Vcc

Rch

Vref

IN+

IN--

OUT

GND

D7

D6

D5

D4

D3

D2

D1

IC103, 107, 204, 603

IC101, 201, 501, 701

IC102, 105, 106, 202, 203, 302,

402, 502, 503, 702, 703

TOP249Y (AAX63650)Switching ControllerPOWER: IC802,804

1: CONTROL 2: LINE-SENSE 3: EXTERNAL CURRENT LIMIT 4: SOURCE 5: FREQUENCY 7: DRAIN

13

24

57

1

3

2

5

7

4

VC

ZC

RE

IFB VI (LIMIT)

VBG+VT

VBG

5.8 V

1 V

SHUNT REGULATOR/ERROR AMPLIFIER

INTERNAL UVCOMPARATOR

–+

–+

–+

–+

CONTROL (C)

LINE-SENSE (L)

FREQUENCY (F)

DRAIN (D)

SOURCE (S)

EXTERNALCURRENT LIMIT (X)

CURRENTLIMIT

ADJUST

SOFTSTART

ON/OFF

5.8 V4.8 V

SOFT START

STOP LOGIC

0

1INTERNALSUPPLY

LINESENSE

OV/UV

DCMAX DCMAXDMAXCLOCK

SAW

STOP SOFT-START

HALFFREQ.

LIGHT LOADFREQUENCYREDUCTION

PWMCOMPARATOR

S Q

RLEADING

EDGEBLANKING

CONTROLLEDTURN-ON

GATE DRIVER

CURRENT LIMITCOMPARATOR

HYSTERETICTHERMAL

SHUTDOWN

SHUTDOWN/AUTO-RESTART

÷ 8

OSCILLATOR WITH JITTER

（ICブロック図）

23

STAGEPAS 300

INSPECTIONS

1. Test Conditions（試験条件）Measuring Voitage（測定電圧）: AC 100 V 50/60 Hz (J)

AC 120 V 60 Hz (U, C, V)AC 240 V 50 Hz (A)AC 230 V 50 Hz (B, H, W)AC 220 V 60 Hz (K)AC 220 V 50 Hz (O)

Load（負荷）: 6 ΩInput（入力）: 1 KHzMASTER LEVEL VR（マスターレベルVR）: MAX.Tone-control VR（トーンコントロールVR）: HIGH, LOW = All channel Center.REVERB SW（リバーブSW）: All channel OFF.REVERB level（リバーブレベルVR）: MIN.SPEECH/MUSIC SW（スピーチ /ミュージックSW）: MUSICUSE MEASUREMENT FILTER: DIN-Audio

NOTE:q Use a low pass filter (20 KHz) to measure noise at the SP jack (SP OUT).（SP端子（SP OUT）でノイズを測定する場合は、ローパスフィルター（20 KHz）を使用してください。）

w The sleeve of the SP OUT Lch is the hot terminal. So, pay attention not to let it contactGND.（SP OUT Lchは、スリーブ側がホット端子となりますので、アースに接触しない様注意してください。）

2. Electric Characteristic（電気特性）

No.

1

2

ITEM

（項目）

OUTPUT POWER

（定格出力）

T. H. D.

（歪率）

INPUT CONDITIONS

（入力条件）

INPUT1-SW=LINE

INPUT1-LEVEL=MAX.

INPUT1-SW=LINE

INPUT1-LEVEL=MAX.

INPUT1-SW=LINE

INPUT1-LEVEL=MAX.

OUTPUT CONDITIONS

（出力条件）

SP OUT: L, R

1 %THD OUTPUT

（1 %歪　出力）SP OUT: L, R

50 W OUTPUT

（50 W　出力）MONITOR OUT: L, R

+14 dBu OUTPUT

(Load: 10 kΩ)

NOMINAL

（標準値）

112 W

0.5 %

0.1 %

LIMIT

（限界値）

>100 W

<1 %

<0.2 %

Sleeve（スリーブ）

Tip（チップ）

（検査）

STAGEPAS 300

24

No.

3

4

5

ITEM

（項目）

INPUT SENSITIVITY

（入力感度）

FREQUENCY

RESPONSE

（周波数特性）

TONE-CONTROL

CHARACTERISTIC

（トーンコントロール特性）

INPUT CONDITIONS

（入力条件）

INPUT 1, 2, 3, 4 (Each)

INPUT=XLR

INPUT-SW=LINE

INPUT-LEVEL=MAX.

INPUT 1, 2, 3, 4 (Each)

INPUT=XLR

INPUT-SW=MIC

INPUT-LEVEL=MAX.

INPUT 1, 2, 3, 4 (Each)

INPUT=PHONE

INPUT-SW=LINE

INPUT-LEVEL=MAX.

INPUT 5 and 6, 7 and 8

(Each pair)

INPUT=PHONE, RCA

INPUT-LEVEL=MAX.

INPUT: 60 Hz

1, 2, 3, 4 (Each)

INPUT=XLR

INPUT-SW=LINE 10 KHz

INPUT-LEVEL=MAX.

INPUT: 60 Hz

5 and 6, 7 and 8

(Each pair)

INPUT=PHONE, RCA 10 KHz

INPUT-LEVEL=MAX.

INPUT 1, 2, 3, 4, 5, 6, 7, 8

(Each)

LOW=MIN.

REF: 30 Hz, LOW VR CENTER

INPUT 1, 2, 3, 4, 5, 6, 7, 8

(Each)

LOW=MAX.

REF: 30 Hz, LOW VR CENTER

INPUT 1, 2, 3, 4, 5, 6, 7, 8

(Each)

HIGH=MIN.

REF: 30 KHz, HIGH VR CENTER

INPUT 1, 2, 3, 4, 5, 6, 7, 8

(Each)

HIGH=MAX.

REF: 30 KHz, HIGH VR CENTER

INPUT1

HIGH, LOW VR CENTER

SPEECH/MUSIC=SPEECH

REF: 80 Hz, MUSIC MODE

OUTPUT CONDITIONS

（出力条件）

SP OUT: L, R

REF: 100 W OUTPUT

MONITOR OUT: L

+4 dBu OUTPUT

(Load: 10 kΩ)

REC OUT: L, R

-8 dBu OUTPUT

(Load: 10 kΩ)

MONITOR OUT: L

+4 dBu OUTPUT

(Load: 10 kΩ)

L

L

SP OUT: L, R

REF: 1 W OUTPUT

（基準: 1 W　出力）

SP OUT: L, R

REF: 1 W OUTPUT

（基準: 1 W　出力）

REF: 300 mV RECOUT

（基準: 300 mV RECOUT　出力）(Load: 10 kΩ)

NOMINAL

（標準値）

-23 dBu

-31 dBu

-31 dBu

-61 dBu

-21 dBu

-21 dBu

+4.0 dB

0 dB

+4.0 dB

0 dB

-15.0 dB

+15.0 dB

-15.0 dB

+15.0 dB

-3.0 dB

LIMIT

（限界値）

-23 dBu±3 dB

-31 dBu±3 dB

-31 dBu±3 dB

-61 dBu±3 dB

-21 dBu±3 dB

-21 dBu±3 dB

+4.0±2 dB

0±2 dB

+4.0±2 dB

0±2 dB

-15.0±2 dB

+15.0±2 dB

-15.0±2 dB

+15.0±2 dB

-3.0±2 dB

25

STAGEPAS 300

(NOTE): 0 dBu=0.775 V

3. Over Load Protection（過負荷保護回路動作）The product shall be set to 12.5 W output on SP OUT.When + and - of SP OUT short-circuit, the product should stop the output and should blink POWER LED.（SP OUTに12.5 Wを出力させ、SP OUTの＋と－をショートさせた時、SP OUTの出力が無くなり、POWER表示LEDが点滅することを確認します。）

4. Limiter Indication（リミッタ－表示の確認）The product shall be set to 31 dBu output on SP OUT.Then, LIMITER LED(RED) should light on and all LEDs of LEVEL meter should light on.（SP OUTに 31 dBuを出力させた時、LIMITER表示LED（赤色）が点灯し（一瞬でも可）、LEVEL表示LEDが全て点灯することを確認します。

No.

6

7

8

9

10

ITEM

（項目）

CROSSTALK

（クロストーク）

SIGNAL TO NOISE

RATIO

（信号雑音比）RESIDUAL NOISE

（残留雑音）

LEVEL METER

INDICATION

（レベルメーター表示）POWER CONSUMPTION

（消費電力）

INPUT CONDITIONS

（入力条件）

INPUT 1, 2, 3, 4, 5, 6, 7, 8 to

Adjacent INPUT

（隣接CH間）INPUT SHORT

（入力短絡）

MASTER-LEVEL=MIN.

SW-MIC

INPUT=XLR

INPUT IMPEDANCE=150 ΩINPUT1

OUTPUT CONDITIONS

（出力条件）

SP OUT:

REF: 100 W OUTPUT

（基準: 100 W　出力）SP OUT: SP OUT

REF: 100 W OUTPUT MONITOR

（基準: 100 W　出力） OUTSP OUT

SP OUT

(MEASURE WITH 20 kHz LPF)

SP OUT:

REF: LEVEL METER=“0”

（LEVEL METER“0”が表示）SP OUT:

REF: 12.5 W OUTPUT

NOMINAL

（標準値）

75 dB

75dB

95dB

-54 dBu

-70 dBu

21 dBu

69 W

LIMIT

（限界値）

>70 dB

>70 dB

>90 dB

<-50 dBu

<-65 dBu

21 dBu±2 dB

<75 W

STAGEPAS 300

26

AJ

ILK

B , C , GD , E , F H

TROUBLE SHOOTING

∗ Points marked by “ A ” to “ L ” in the figure of circuit board are the points to be checked as indicated by thesame marks in the flowchart on the next page or after.

※ 基板図の A ～ L は、次ページからのフローチャートにおけるチェックポイントを示しています。

POWER Circuit Board

Component side（部品側）

Pattern side（パターン側）

（トラブルシューティング）

27

STAGEPAS 300

• Trouble Shooting (POWER circuit board)

START

F1 (Fuse)OPEN ?

Yes

No

< Fuse :Primary >

+VB = +38 V (DC)?

CN4: 7 pin

Yes

No

CN4: 5 pin

Yes

No

+15 V (DC) ?CN19: 7 pin

Yes

No

+5 V (DC) ?CN19: 6 pin

Yes

No

-15 V (DC) ?CN19: 8 pin

Yes

No

Yes

No

-VB = -38 V (DC)?

Check IC801,D804,D830 and peripheral

IC801,D804,D830及び周辺の確認

Check IC805 and peripheral

IC805及び周辺の確認

Check IC803,D829,D814 and peripheral

IC803,D829,D814及び周辺の確認

Check Q806,D824,R847,R851

Q806,D824,R847,R851の確認

VDR= -28 V (DC) ?

CN4: 3 pin

No

Check Q807,D825,R848,R856

Q807,D825,R848,R856の確認

VDR= -28 V (DC) ?

CN6: 3 pin

1 2

Yes

< Power Supply :+VB >

< Power Supply :-VB >

< Power Supply :+15 V >

< Power Supply :-15 V >

< Power Supply :+5 V >

[ No Load ]

[ With Load ]

< Lch :VDR1 >

< Rch :VDR2 >

A

B

C

D

E

F

G

H

Connect the Power Amplifier Units. (AAX62070)

パワーアンプユニット（AAX62070）を接続

STAGEPAS 300

28

Power LED = ON ?

Yes

No

Replace the Power Amplifier Unit.

パワーアンプユニットを外す

1

Remove the Power Amplifier Unit.

Power LED = ON ?

Yes

パワーアンプユニットの交換

No

Q817:Base = 0 V

?

No

Check R908,R913,R909,R892,R893 R894,R895,Q819,Q818,Q820 Q821,Q822,C912,C913

Yes

R908,R913,R909,R892,R893 R894,R895,Q819,Q818,Q820 Q821,Q822,C912,C913 の確認

R867,R872,R905,R906,R907 R888,R889,Q823,Q814,Q815 Q816,C999,C845,D826,D828 の確認

Check R867,R872,R905,R906,R907 R888,R889,Q823,Q814,Q815 Q816,C999,C845,D826,D828

OUTPUT OK ?

Yes

No

END

Q808: Base = 0.6 V (DC)

?

Yes

No

Replace the Power Amplifier Unit.

パワーアンプユニットの交換

Check R910,R863,R911,R864,R865,R868 R874,R869,R870,R900,R871,R875 Q824,Q809,Q810,Q811,Q808,Q817 C847

R910,R863,R911,R864,R865,R868 R874,R869,R870,R900,R871,R875 Q824,Q809,Q810,Q811,Q808,Q817 C847の確認

Replace the POWER circuit board.

POWERシートの交換

2

INPUTシート、FILTERシート、VRシート及びFANを接続

Connect the circuit boards(INPUT,FILTER,VR)and two fans.

Q817:OFF

Q817:ON

Q808:ON

Q808:OFF

< Power LED >

Q822:ON

CN9:2 pin(4 pin)

< Signal Path >< FAN >

I

J

K

L