Yamaha Ax-497 Building instructions

SERVICE MANUAL

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.

It has been assumed that basic service 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 advise all YAMAHA product owners that any service required should be performed by an authorized YAMAHA

Retailer or the appointed service representative.

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or

recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service

departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and

specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the

distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have

accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).

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

IMPORTANT NOTICE

100974

SERVICE MANUAL

STEREO AMPLIFIER

ADJUSTMENT / 調整 ........................... 11

IC DATA / ICデータ ............................ 12

BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

PIN CONNECTION DIAGRAM / 半導体外形図 ...... 14

PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 15–20

SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . 21–22

PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23–33

REMOTE CONTROL RAX15 . . . . . . . . . . . . . . . . . . 34

■ CONTENTS

TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . 2–3

IMPEDANCE SELECTOR . . . . . . . . . . . . . . . . . . . . . . 3

REMOTE CONTROL PANEL . . . . . . . . . . . . . . . . . . . 3

FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6

SPECIFICATIONS / 参考仕様 ................... 7–8

INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

DISASSEMBLY PROCEDURES / 分解手順 ...... 9–10

DPX-1200

AX-497

This manual is copyrighted by YAMAHA and may not be copied or

redistributed either in print or electronically without permission.

’05.09

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AX-497

■ TO SERVICE PERSONNEL

1. Critical Components Information

Components having special characteristics are marked Z

and must be replaced with parts having specifications equal

to those originally installed.

2. Leakage Current Measurement (For 120V Models Only)

When service has been completed, it is imperative to verify

that all exposed conductive surfaces are properly insulated

from supply circuits.

●Meter impedance should be equivalent to 1500 ohms shunted

by 0.15µF.

AC LEAKAGE

TESTER OR

EQUIVALENT

EQUIPMENT

UNDER TEST

INSULATING

TABLE

WALL

OUTLET

●Leakage current must not exceed 0.5mA.

●Be sure to test for leakage with the AC plug in both

polarities.

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 cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR

ANY REASON WHATSOEVER!

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.

About Lead Free Solder / 無鉛ハンダについて

The P.C.B.s installed in this unit are soldered using the fol-

lowing solder. 本機に搭載されている基板のハンダ付けに使用されている

ハンダは下記の通りです。

“CAUTION”

“F151, F152 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A, 125V FUSE.”

CAUTION

F151, F152 : REPLACE WITH SAME TYPE 8A, 125V FUSE.

ATTENTION

F151, F152 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 8A, 125V.

AV

 

  

  

Side A

Side B

SMT REFLOW Process

MI FLOW Process

Solder Dip

Among some types of lead free solder currently available, it

is recommended to use one of the following types for the

repair work.

•Sn + Ag + Cu (tin + silver + copper)

•Sn + Cu (tin + copper)

•Sn + Zn + Bi (tin + zinc + bismuth)

無鉛ハンダにはいくつかの種類がありますが、修理時には

下記のような無鉛ハンダの使用を推奨します。

・Sn+Ag+Cu（錫+ 銀+ 銅）

・Sn+Cu（錫+銅）

・Sn+Zn+Bi（錫+ 亜鉛+ ビスマス）

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AX-497

DPX-1200

AX-497

■IMPEDANCE SELECTOR

Caution:

1. As the melting point temperature of the lead free solder is

about 30°C to 40°C (50°F to 70°F) higher than that of the

lead solder, be sure to use a soldering iron suitable to

each solder.

2. If lead solder must be used, be sure to remove lead free

solder from each terminal section of the parts to be replaced

and from the area around it completely before soldering, or

make sure that the lead free solder and lead solder melt

together fully.

注意：

1. 無鉛ハンダの融点温度は通常の鉛入りハンダに比べ30〜

40℃程度高くなっていますので、それぞれのハンダに

合ったハンダごてをご使用ください。

2. 鉛入りハンダを使わざるを得ない場合は、あらかじめ交

換する部品端子部やその周辺部の無鉛ハンダをすべて取

り除くか、あるいは無鉛ハンダと鉛入りハンダが十分に

溶けた状態となるようにハンダ付けしてください。

WARNING:

Do not change the setting of the IMPEDANCE SELECTOR switch

when the unit power is switched on, as doing so may damage

the unit.

ご注意







IMPEDANCE SELECTOR

■FRONT PANEL

■REMOTE CONTROL PANEL

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AX-497

■REAR PANELS

▼ U, C models

▼ R model

▼ T model

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AX-497

DPX-1200

AX-497

▼ K model

▼ A model

▼ B model

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AX-497

▼ G, E models

▼ L model

▼ J model

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7

AX-497

DPX-1200

AX-497

GENERAL / 総合

Power Supply / 

U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . AC 120V, 60 Hz

R model . . . . . . . . . . . . . AC 110/120/220/230-240 V, 50/60 Hz

T model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 220 V, 50 Hz

K model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 220 V, 60 Hz

A model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 240 V, 50 Hz

B, G, E models . . . . . . . . . . . . . . . . . . . . . . . . AC 230 V, 50 Hz

L model . . . . . . . . . . . . . . . . . . . . AC 220/230-240 V, 50/60 Hz

J model . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 100V, 50/60 Hz

Power Consumption / 

U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 W/300VA

R, T, K, A, B, G, E, L, J models . . . . . . . . . . . . . . . . . . . 220 W

L model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 W

Standby Power Consumption / 

U, C,T, K, A, B, G, E, J models . . . . . . . . . . . . . . . . . . . . 1.1 W

R model (AC 110/120 V) . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 W

R, L models (AC 220/230-240 V) . . . . . . . . . . . . . . . . . . . 2.7 W

Maximum Power Consumption

R model (1 kHz, 6 ohms, 10%THD) . . . . . . . . . . . . . . . 490 W

AC Outlet / 

3 Switched Outlet

R, J models . . . . . . . . . . . . . . . . . . . . . . . . . . 50 W Max. total

U, C,T, G, E, L models . . . . . . . . . . . . . . . . 100 W Max. total

1 Switched Outlet

A, B models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 W Max.

Dimensions (W x H x D) / 

. . . . . . . . . . . . . . . . . . . . . . . . . 435 x 151 x 390 mm

(17-1/8" x 5-15/16" x 15-3/8")

Weight /  . . . . . . . . . . . . . . . . . . . . . . . . .9.1 kg (20 lbs 1 oz)

Finish /  . . . . . Black color (U, C, R, A, B, G, E, L models)

Titanium color (R, B, G, E, L models)

Gold color (J, R, T, K, L models)

Accessories /  . . . . . . . . . . . . . . . . . Remote Control x 1

Battery (Manganese Dry) x 2

* Specifications subject to change without notice.

U ........ USA model

C ........ Canadian model

R ........ General model

T ........ Chinese model

K ........ Korean model

A ........ Australian model

B ........ British model

G ........ European model

E ........ South European model

L ........ Singapore model

J ........ Japanese model

■SPECIFICATIONS/参考仕様

AUDIO SECTION / オーディオ部

Minimum RMS Output Power (Power Amp. Section) / 

L/R, 20 Hz to 20 kHz

U, C, R,T, K, A, B, G, E, L, J models (0.019%THD, 8 ohms) . .

85 W + 85 W

U, C, R,T, K, A, B, G, E, J models (0.038%THD, 6 ohms) . .

100 W + 100 W

Dynamic Power Per Channel (IHF) / 

8/6/4/2 ohms . . . . . . . . . . . . . . . . . . . . . . . 130/150/185/220 W

Maximum Power Per Channel (B, G, E models)

1 kHz, 0.7 % THD, 4 ohms . . . . . . . . . . . . . . . . . . . . . . . . 120 W

IEC Power (B, G, E models)

1 kHz, 0.019% THD, 8 ohms . . . . . . . . . . . . . . . . . . . . . . 100 W

Power BandWidth / 

L/R, 0.04% THD, 42.5 W, 8 ohms . . . . . . . . . . 10 Hz to 50 kHz

Damping Factor / 

20 Hz to 20 kHz, SPEAKER-A, 8 ohms . . . . . . . . . 240 or more

Maximum Power (EIAJ) / 

1 kHz, 10 % THD

R, T, K, L, J models (8 ohms) . . . . . . . . . . . . . . . . . . . . . . 130 W

R, T, K, J models (6 ohms) . . . . . . . . . . . . . . . . . . . . . . . . 150 W

Input Sensitivity/Input Impedance / 

PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 mV/47 k-ohms

CD, etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 mV/47 k-ohms

Maximum Input Signal / 

PHONO MM, 1kHz, 0.003 % THD . . . . . . . . . . . . . . . . . 115 mV

CD, etc., 1kHz, 0.5 % THD . . . . . . . . . . . . . . . . . . . . . . . . 2.2 V

Output Level/Output Impedance / 

REC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . 195 mV/1.6 k-ohms

Headphone Jack Rated Output/Output Impedance /



CD, etc.1 kHz, 150 mV, 8 ohms, 0.019% THD . . . . . . . .

300 mV/680 ohms

Frequency Response / 

CD, etc. 20 Hz to 20 kHz . . . . . . . . . . . . . . . . . . . . . .0 ±0.5 dB

CD/DVD DIRECT AMP ON, 10 Hz to 100 kHz . . . . .0 ±1.0 dB

RIAA Equalization Deviation / 

PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 ±0.3 dB

Total Harmonic Distortion (20 Hz to 20 kHz) / 

PHONO MM to REC OUT (3 V) . . . . . . . . . . . . . . . .

0.003 % or less

CD, etc. to SP OUT (42.5 W/8 ohms) . . . . . . . 0.009 % or less

Signal to Noise Ratio (IHF-A Network) / 

PHONO MM (Input shorted, 5 mV) . . . . . . . . . . 88 dB or more

CD (CD DIRECT AMP ON, Input shorted, 195mV) . . . . . .

110 dB or more

Residual Noise (IHF-A Network) / 

CD DIRECT AMP ON . . . . . . . . . . . . . . . . . . . . . 35 µV or less

PURE DIRECT ON . . . . . . . . . . . . . . . . . . . . . . . 90 µV or less

Channel Separation / 

CD, etc. (Input 5.1 k-ohms shorted)

1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 dB or more

10 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 dB or more

Tone Control Characteristics / 

BASS Boost/Cut (20 Hz) . . . . . . . . . . . . . +10 dB/-10 dB

Turnover Frequency . . . . . . . . . . . . . . . . . 350 Hz

TREBLE Boost/Cut (20 kHz) . . . . . . . . . . . . +10 dB/-10 dB

Turnover Frequency . . . . . . . . . . . . . . . . . 3.5 kHz

Continuous Loudness Control /



Attenuation (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 dB

GainTracking Error / 

0 to -60 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 dB or less

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AX-497

Unit : mm (inch)

DIMENSIONS/寸法図

■INTERNAL VIEW

qMAIN (2) P.C.B.

wMAIN (4) P.C.B. (R, L models)

eMAIN (5) P.C.B.

rMAIN (1) P.C.B.

tMAIN (6) P.C.B.

yMAIN (3) P.C.B.

uFUNCTION (4) P.C.B.

iFUNCTION (5) P.C.B.

oFUNCTION (12) P.C.B.

!0 FUNCTION (7) P.C.B.

!1 FUNCTION (6) P.C.B.

!2 FUNCTION (1) P.C.B.

!3 FUNCTION (10) P.C.B.

!4 FUNCTION (8) P.C.B.

!5 FUNCTION (11) P.C.B.

!6 FUNCTION (2) P.C.B.

!7 FUNCTION (9) P.C.B.

!8 FUNCTION (3) P.C.B.

435 (17-1/8")

151 (5-15/16")

130 (5-1/8") 350 (13-3/4")21

(13/16") 18.5

(3/4") 21.5

(7/8")

390 (15-3/8")

ywe r t i

o!6

o

!7

q

!0 !1 !8

!0 !1 !2

!3 !4 !5 !2

u

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

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9

AX-497

DPX-1200

AX-497

■DISASSEMBLY PROCEDURES/分解手順

 

 

1. トップカバーの外し方

a. qのネジ4本、wのネジ1本、eのネジ4本を外します。

（Fig.1）

b. トップカバーを後方へスライドさせ取り外します。

（Fig.1）

2. フロントパネルユニットの外し方

a. INPUTツマミを取り外します。

b. rのネジ1本を外し、サポートトップを取り外します。

（Fig.1）

c. tのネジ7本を外し、フロントパネルユニットを取り外し

ます。（Fig.1）

3. プレートサイドの外し方

yのプッシュリベット2本を外し、プレートサイドL/Rを

取り外します。（Fig.1）

4. サブシャーシユニットの外し方

a. uのプッシュリベット1本を外します。（Fig.1）

b. iのネジ2本を外し、サブシャーシユニットを前方へ引き

出します。（Fig.1）

c. ケーブルを固定している束線止めをゆるめます。

d. コネクターCB221、CB226、CB302、CB306、CB532、CB581、

CB681を外し、サブシャーシユニットを取り外します。

（Fig.1）

1. Removal of Top Cover

a. Remove 4 screws ( q ), 1 screw ( w ) and 4 screws (

e ). (Fig. 1)

b. Slide the Top Cover rearward to remove it. (Fig. 1)

2. Removal of Front Panel Unit

a. Remove the INPUT knob.

b. Remove 1 screw ( r ) and then remove the Support

Top. (Fig. 1)

c. Remove 7 screws ( t ) and then remove the Front

Panel Unit. (Fig. 1)

3. Removal of Plate Side

Remove 2 push rivets ( y ) and then remove the Plate

Side L/R. (Fig. 1)

4. Removal of Sub Chassis Unit

a. Remove 1 push rivet ( u ). (Fig. 1)

b. Remove 2 screws ( i ) and then slide the Sub Chassis

Unit forward. (Fig. 1)

c. Loosen the harness fixture fixing the cable.

d. Remove connectors CB221, CB226, CB302, CB306,

CB532, CB581 and CB681 and then remove the Sub

Chassis Unit. (Fig. 1)

•Remove parts in disassembly order as numbered.

•Disconnect the power cable from the AC outlet.

Top Cover



Front Panel Unit



Knob



Sub Chassis Unit



Support Top

 Plate Side L



Plate Side R





CB306

CB302

CB532

CB581

CB681

CB221 CB226

r

i

u

e

y

t

q

e

w

Fig. 1

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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AX-497

5. アンプユニットの外し方

a. インピーダンスセレクターを止めているoのネジ1本を

外します。（Fig.2）

b. スピーカーターミナルを止めている!0のネジ2本を外し

ます。（Fig.2）

c. !1のネジ2本を外し、MAIN(4)P.C.B.を取り外します。

（Fig.2）（R,L仕向けのみ）

d. !2のネジ2本と!3のネジ2本を外します。（Fig.2）

e. コネクターCB3とCB151を外します。(Fig.2)

f. アンプユニットを取り外します。（Fig.2）

5. Removal of Amp Unit

a. Remove 1 screw ( o ) attaching the Impedance

Selector. (Fig. 2)

b.

Remove 2 screws (

!0

) attaching the Speaker Termnal.

(Fig. 2)

c. Remove 2 screws ( !1 ) and then remove the MAIN (4)

P.C.B. (Fig. 2) (R, L models only)

d. Remove 2 screws ( !2 ) and 2 screws ( !3 ). (Fig. 2)

e. Remove connectors CB3 and CB151. (Fig. 2)

f. Remove the Amp Unit. (Fig. 2)

Fig. 2

!0

o

!1

!3

!2

Amp Unit



MAIN (4) P.C.B.

CB3

CB151

Speaker Terminal



Impedance Selector



w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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11

AX-497

DPX-1200

AX-497

■ADJUSTMENT/調整

●アイドリング電流の確認

1. 電源投入直後、R64(Lch)/R65(Rch)の端子間の電圧を測

定し、0.1mVから 10.0mVの間であることを確認してく

ださい。

2. 電圧が10mVを越えている場合は、R51(Lch)/R52(Rch)

の抵抗をカットし、電圧を再確認してください。

3. 60分後、電圧が0.25mV〜30.0mVであることを確認して

ください。

●CONFIRMATION OF IDLING CURRENT

1. Right after the power is turned on, confirm that the volt-

age across the terminals of R64 (L ch) and R65 (R ch)

are between 0.1mV to 10.0mV.

2. If the measured voltage exceeds 10.0mV, open (cut off)

R51 (L ch), R52 (R ch) and reconfirm the voltage.

3. Confirm that the voltage is between 0.25mV and 30.0mV

after 60 minutes.

R64

R51 R52

R65

R64 (L ch)

R65 (R ch)

Cut

R51 (L ch)

R52 (R ch)

0.1mV–10mV

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

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12

AX-397

IC301 : M38503G4A-101FP (FUNCTION (1) P.C.B.)

8-bit Microprocessor

■IC DATA/ICデータ

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

VCC

VREF

AVSS

P44/INT3/PWM

P43/INT2/SCMP2

P42/INT1

P41/INT0

P40/CNTR1

P27/CNTR0//SRDY1

P26/SCLK1

P25/TXD

P24/RXD

P23

P22

CNVSS

P21/XCIN

P20/XCOUT

/RESET

XIN

XOUT

VSS

P17/(LED7)

P16/(LED6)

P15/(LED5)

P14/(LED4)

P13/(LED3)

P12/(LED2)

P11/(LED1)

P10/(LED0)

P07(AN8)

P06(AN7)

P05(AN6)

P04(AN5)

P03//SRDY2

P02/SCLK2

P01/SOUT2

P00/SIN2

P34/AN4

P33/AN3

P32/AN2

P31/AN1

P30/AN0

MCU

I

O

O/I

O

MCU

I

O

MCU

O

I

O

I

O

I

Power Supply, +5V

AD Reference

AD Ground

Power Down Detect

Tape Monitor /Pure Direct SW

SYSTEM Power SW

Remote Control (Wake up)

Release the Protection

Chip Enable (INPUT SEL)

Clock

Data

Tape Monitor (397)/Destination Distinction (497)

Motor Volume (UP)

Motor Volume (DOWN)

Vss: when single chip mode is used, Vcc: when flash writing is used

AX-497/397 Detect

CD Direct Mute

Reset

Oscillator In

Oscillator Out

Ground

LED (AUX)

LED (TAPE)

LED (MD)

LED (CD)

LED (TUNER)

LED (PHONO)

LED (POWER)

LED (CD DIRECT)

LED (TAPE MONITOR/PURE DIRECT)

Rotary Encoder (Left)

Rotary Encoder (Right)

Mute

CD Direct SW

Protection (Overload)

Speaker Relay

Power Relay

Protection (DC)

Protection (Power Supply)

Protection (Temperature Detection)

Rec Out Selector Detect

No.

Port I/O

Function

PD

TPM/PD

PS

REM

PRINH

CEI

CK

DATA

TMO/DEST

VRUP

VRDN

CNVSS

D43

CDM

LEDA

LEDTP

LEDM

LEDC

LEDT

LEDP

LSBY

LEDCDD

LEDTM/PD

ENL

ENR

MUTE

CDD

PRI

RYSP

RYPS

PRDC

PRPS

THMR

THML

REC

Name

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

V

CC

AV

SS

P4

4

/INT

3

/PWM

P4

3

/INT

2

/S

CMP2

P4

2

/INT

1

P4

1

/INT

0

P4

0

/CNTR

1

P2

7

/CNTR

0

/S

RDY1

P2

6

/S

CLK1

P2

5

/T

X

D

P2

4

/R

X

D

P2

3

P2

2

CNV

SS

P2

1

/X

CIN

P2

0

/X

COUT

RESET

X

IN

X

OUT

V

SS

V

REF

P3

0

/AN

0

P3

1

/AN

1

P3

2

/AN

2

P3

3

/AN

3

P3

4

/AN

4

P0

0

/S

IN2

P0

1

/S

OUT2

P0

2

/S

CLK2

P0

3

/S

RDY2

P0

4

/(AN

5

)

P0

5

/(AN

6

)

P0

6

/(AN

7

)

P0

7

/(AN

8

)

P1

0

/(LED

0

)

P1

1

/(LED

1

)

P1

2

/(LED

2

)

P1

3

/(LED

3

)

P1

5

/(LED

5

)

P1

6

/(LED

6

)

P1

7

/(LED

7

)

P1

4

/(LED

4

)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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13

AX-497

DPX-1200

AX-497

■BLOCK DIAGRAM

10dB

–10dB

PHONO

CD/DVD SP A

SP B

PHONES

TUNER

AUX

TAPE

IN

TAPE

OUT

MD

IN

MD

OUT

CD/DVD DIRECT AMP

REC OUT

SELECTOR

INPUT

SELECTOR

PHONO EQ AMP

CD/DVD DIRECT AMP

MOTOR

DRIVER

ON

OFF OFF

OFF 33.5dB

M

Main VR

10dB

RYPS

LOUDNESS

BALANCE

TONE CONTROL

PURE DIRECT

MAIN

MUTE

CD-D

MUTE

A

B

POWER AMP

RYSP LB

15

–15

B

–B

LB

12S

+

IC502

IC501

IC454 IC451

Q451,452 SW301

SW302

SW581

SW4

T151

D15–18

D153–156

D20

D19

Q3

Q4

Q151

RY2

RY151

SW681

RY3

RY1

Q1,2

Q26 Q27

Q25

Q5—30

VR421

VR531–534

IC302 IC531,532

IC421

IC452

IC457

IC455

IC456

PD

CDD

POWER

MAIN

MUTE

Rec Out Selector

STANDBY

/ON

RYPS

(Power ON/OFF)

Remote Control

SERIAL DATA

(Input & Rec Out)

Input Select

Main VR

Protection

PD

CDD

RYSP

SW621 U631

IC301

SW622 SW531

Q305

CD-D

MUTE

Q303

XL301

4MHz

19 20 11

6 7 31,32 42 37

13,14 5 34 17 33 3635,38–41

Microprocessor

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

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14

AX-497

■PIN CONNECTION DIAGRAM/半導体外形図

LM61CIZ

1: +Vs

2: Vout

3: GND

● ICs

NJU7312AM

NJU7313AM

30 15

1

16

84

1

5

NJM2068MD-TE2 M38503G4A-101FP

42

21

1

22

LB1641

1

10

1SS133

1SS139

1SS140

1SS176

1SS270A

HZS12B2TD

HZS162TD

● Diodes

1SS355

MA8039-L

MA8047-L

MA8051-M

MA8062-M

MA8068-L

2SA933AS (R, S)

2SD1915F (S, T)

2SC1704S (Q, R, S)

● Transistors

EB

C

B

CE

2SC4488 (S, T) 2SB1274 (Q, R, S)

2SD1913 (R, S)

Anode

Cathode

2SA2168 (S, T)

2SC5291 (S, T)

B

C

E

2SA970 (GR, BL)

2SA1015 (Y)

2SA1145 (O, Y)

2SC1815 (Y)

2SC2705 (O, Y)

2SC2N5551C-AT

2SA2N5401C-AT

C

E

B

2SA1037K (Q, R, S)

DTC114EKA

DTC144EKA

S5VB20

2SA2151 (O, P, Y)

2SC6011 (O, P, Y)

2SC4466 (O, P, Y)

BCE

ECB

BCE

Anode

Cathode

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

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ABCDEFGH

1

2

3

4

5

6

AX-497

15

■PRINTED CIRCUIT BOARD (Foil side)

FUNCTION (1) P.C.B. (Side A) FUNCTION (1) P.C.B. (Side B) Lead Free Solder Used

PURE DIRECTCD/DVD DIRECT AMP

FUNCTION (11)

CB641

MAIN (3)

CB201

FUNCTION (8)

CB601

FUNCTION (4)

W451

MAIN (5)

CB221

MAIN (6)

CB226

FUNCTION (6)

CB531

14

58

1

21

42

22

12CH1

2CH2

110

VOLUME

FUNCTION (2) P.C.B.

(Side A)

FUNCTION (3) P.C.B.

(Side A)

FUNCTION (3) P.C.B.

(Side B) Lead Free Solder Used

Point w

CH 1 : Emitter of Q309

CH 2 : Collector of Q304

↑

AC POWER ON

(Connect the power cable)

↑

AC POWER OFF

(Disconnect the power cable)

↑

AC POWER ON

(Connect the power cable)

Point q(Pin 20 of IC301)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

ABCDEFGH

1

2

3

4

5

6

AX-497

16

■PRINTED CIRCUIT BOARD (Foil side)

TUNER

IN

OUT

IN

OUT

AUX

MD

TAPE

FUNCTION (1)

CB302

1

4

8

5

1

4

8

5

1

4

8

5

1

4

8

5

115

30 16

115

30 16

PHONO

CD/DVD

1

4

8

5

1

4

8

5

FUNCTION (5) P.C.B.

(Side A) FUNCTION (5) P.C.B.

(Side B) Lead Free Solder Used

FUNCTION (4) P.C.B.

(Side A) FUNCTION (4) P.C.B.

(Side B) Lead Free Solder Used

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

ABCDEFGH

1

2

3

4

5

6

AX-497

17

■PRINTED CIRCUIT BOARD (Foil side)

FUNCTION (6) P.C.B.

(Side A)

FUNCTION (7) P.C.B.

(Side A)

BALANCE REC OUTLOUDNESSTREBLEBASS

MAIN (1)

W2

FUNCTION (1) CB304

1

4

8

5

14

85

FUNCTION (6) P.C.B.

(Side B) Lead Free Solder Used

PHONES

SPEAKERS

AB

MAIN (1)

CB1

PHONO TUNER CD/DVD TAPE MD AUX

FUNCTION (1)

CB305

FUNCTION (10)

CB631

FUNCTION (8) P.C.B.

(Side A)

FUNCTION (8) P.C.B.

(Side B) Lead Free Solder Used

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

ABCDEFGH

1

2

3

4

5

6

AX-497

18

■PRINTED CIRCUIT BOARD (Foil side)

FUNCTION (10) P.C.B.

(Side A)

FUNCTION (10) P.C.B.

(Side B) Lead Free Solder Used

FUNCTION (11) P.C.B.

(Side A)

CD/DVD DIRECT AMPPURE DIRECT

FUNCTION (1)

CB303

POWER

MAIN (2)

W151

FUNCTION (12) P.C.B.

(Side A)

FUNCTION (9) P.C.B.

(Side A)

FUNCTION (9) P.C.B.

(Side B) Lead Free Solder Used

INPUT

STANDBY

/ON

STANDBY

FUNCTION (8)

CB603

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

ABCDEFGH

1

2

3

4

5

6

AX-497

19

■PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder Used

Q23A Q23C

Q24A Q24C

SPEAKERS

IMPEDANCE

SELECTOR

R

B

A

L

FUNCTION (1)

CB306

FUNCTION (6)

CB532

FUNCTION (7)

CB581

POWER TRANSFORMER

MAIN (2)

CB151

MAIN (3) P.C.B.

(Side A)

MAIN (1) P.C.B.

(Side A)

Circuit No.

C48–55

R98, 99

R,T, K, A, B, G, E, L

O

U, C, J

X

X: NOT USED

O: USED/APPLICABLE

MAIN (1)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

ABCDEFGH

1

2

3

4

5

6

AX-497

20

■PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder Used

MAIN (2) P.C.B.

(Side A) MAIN (4) P.C.B. (Side A)

R, L models

Circuit No.

F151

R152, 153

C151, 152

Q152, 153

D152

CB152, 153

J151

J152

J

X

O

X: NOT USED

O: USED/APPLICABLE

U, C

O

X

O

X

R

X

O

X

O

T

X

O

K

X

O

A

X

O

B

X

O

G, E

O

X

O

X

L

X

O

MAIN (2)

POWER TRANSFORMER (U, C, T, K, A, B, G, E, J)

or MAIN (4)

W211

(R, L)

POWER CABLE

MAIN (1)

CB2

AC OUTLETS

FUNCTION (12)

CB681

POWER TRANSFORMER

MAIN (2)CB154

VOLTAGE SELECTOR

240V

220V

110V

120V

1−2/5−6

2−3/6−7

3−4/7−8

4−5/8−1

SW211

MAIN (5) P.C.B.

(Side A) MAIN (6) P.C.B.

(Side A)

FUNCTION (1)

W301

FUNCTION (1)

W301

Circuit No.

F211

CB213, 214

J211–213

J214

X: NOT USED

O: USED/APPLICABLE

L

X

O

R

O

X

MAIN (4)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

Yamaha AX-497 Building instructions

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