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STEREO AMPLIFIER

AX-497 SERVICE MANUAL




DPX-1200
IMPORTANT NOTICE




AX-497
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.




s CONTENTS
TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . 2­3 ADJUSTMENT / 11
IMPEDANCE SELECTOR . . . . . . . . . . . . . . . . . . . . . . 3 IC DATA / 12
REMOTE CONTROL PANEL . . . . . . . . . . . . . . . . . . . 3 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 PIN CONNECTION DIAGRAM / 14
REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4­6 PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 15­20
SPECIFICATIONS / 7­8 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . 21­22
INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23­33
DISASSEMBLY PROCEDURES / 9­10 REMOTE CONTROL RAX15 . . . . . . . . . . . . . . . . . . 34




© 2005 YAMAHA CORPORATION. All rights reseved.
100974 This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.

'05.09
AX-497




s TO SERVICE PERSONNEL
AC LEAKAGE
1. Critical Components Information WALL EQUIPMENT TESTER OR
Components having special characteristics are marked Z OUTLET UNDER TEST EQUIVALENT
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 INSULATING
from supply circuits. TABLE

q Meter impedance should be equivalent to 1500 ohms shunted q Leakage current must not exceed 0.5mA.
by 0.15µF.
q Be sure to test for leakage with the AC plug in both
polarities.
"CAUTION"
"F151, F152 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A, 125V FUSE."
A V
CAUTION
F151, F152 : REPLACE WITH SAME TYPE 8A, 125V FUSE.
AX-497




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



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




Side A SMT REFLOW Process



Solder Dip
Side B
MI FLOW Process


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)


2
AX-497



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.




s IMPEDANCE SELECTOR s REMOTE CONTROL PANEL




DPX-1200
AX-497
IMPEDANCE SELECTOR


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.




s FRONT PANEL




3
AX-497




s REAR PANELS
w U, C models
AX-497




w R model




w T model




4
AX-497




w K model




DPX-1200
AX-497
w A model




w B model




5
AX-497




w G, E models
AX-497




w L model




w J model




6
AX-497




s SPECIFICATIONS
AUDIO SECTION / GENERAL /
Minimum RMS Output Power (Power Amp. Section) / Power Supply /
L/R, 20 Hz to 20 kHz U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . AC 120 V, 60 Hz
U, C, R, T, K, A, B, G, E, L, J models (0.019% THD, 8 ohms) . . 85 W + 85 W R model . . . . . . . . . . . . . AC 110/120/220/230-240 V, 50/60 Hz
U, C, R, T, K, A, B, G, E, J models (0.038% THD, 6 ohms) . . 100 W + 100 W T model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 220 V, 50 Hz
Dynamic Power Per Channel (IHF) / K model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 220 V, 60 Hz
8/6/4/2 ohms . . . . . . . . . . . . . . . . . . . . . . . 130/150/185/220 W A model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 240 V, 50 Hz
Maximum Power Per Channel (B, G, E models) B, G, E models . . . . . . . . . . . . . . . . . . . . . . . . AC 230 V, 50 Hz
1 kHz, 0.7 % THD, 4 ohms . . . . . . . . . . . . . . . . . . . . . . . . 120 W L model . . . . . . . . . . . . . . . . . . . . AC 220/230-240 V, 50/60 Hz
IEC Power (B, G, E models) J model . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 100 V, 50/60 Hz
1 kHz, 0.019% THD, 8 ohms . . . . . . . . . . . . . . . . . . . . . . 100 W Power Consumption /
Power Band Width / U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 W/300VA
L/R, 0.04% THD, 42.5 W, 8 ohms . . . . . . . . . . 10 Hz to 50 kHz R, T, K, A, B, G, E, L, J models . . . . . . . . . . . . . . . . . . . 220 W
Damping Factor / L model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 W
20 Hz to 20 kHz, SPEAKER-A, 8 ohms . . . . . . . . . 240 or more Standby Power Consumption /




DPX-1200
Maximum Power (EIAJ) / U, C, T, K, A, B, G, E, J models . . . . . . . . . . . . . . . . . . . . 1.1 W




AX-497
1 kHz, 10 % THD R model (AC 110/120 V) . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 W
R, T, K, L, J models (8 ohms) . . . . . . . . . . . . . . . . . . . . . . 130 W R, L models (AC 220/230-240 V) . . . . . . . . . . . . . . . . . . . 2.7 W
R, T, K, J models (6 ohms) . . . . . . . . . . . . . . . . . . . . . . . . 150 W Maximum Power Consumption
Input Sensitivity/Input Impedance / R model (1 kHz, 6 ohms, 10% THD) . . . . . . . . . . . . . . . 490 W
PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 mV/47 k-ohms AC Outlet /
CD, etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 mV/47 k-ohms 3 Switched Outlet
Maximum Input Signal / R, J models . . . . . . . . . . . . . . . . . . . . . . . . . . 50 W Max. total
PHONO MM, 1kHz, 0.003 % THD . . . . . . . . . . . . . . . . . 115 mV U, C, T, G, E, L models . . . . . . . . . . . . . . . . 100 W Max. total
CD, etc., 1kHz, 0.5 % THD . . . . . . . . . . . . . . . . . . . . . . . . 2.2 V 1 Switched Outlet
Output Level/Output Impedance / A, B models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 W Max.
REC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . 195 mV/1.6 k-ohms Dimensions (W x H x D) /
Headphone Jack Rated Output/Output Impedance / . . . . . . . . . . . . . . . . . . . . . . . . . 435 x 151 x 390 mm
(17-1/8" x 5-15/16" x 15-3/8")
CD, etc. 1 kHz, 150 mV, 8 ohms, 0.019% THD . . . . . . . . 300 mV/680 ohms Weight / . . . . . . . . . . . . . . . . . . . . . . . . . 9.1 kg (20 lbs 1 oz)
Frequency Response / Finish / . . . . . Black color (U, C, R, A, B, G, E, L models)
CD, etc. 20 Hz to 20 kHz . . . . . . . . . . . . . . . . . . . . . . 0 ± 0.5 dB Titanium color (R, B, G, E, L models)
CD/DVD DIRECT AMP ON, 10 Hz to 100 kHz . . . . . 0 ± 1.0 dB Gold color (J, R, T, K, L models)
RIAA Equalization Deviation / Accessories / . . . . . . . . . . . . . . . . . Remote Control x 1
PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 ± 0.3 dB Battery (Manganese Dry) x 2
Total Harmonic Distortion (20 Hz to 20 kHz) / * Specifications subject to change without notice.
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) /
U ........ USA model B ........ British model
PHONO MM (Input shorted, 5 mV) . . . . . . . . . . 88 dB or more C ........ Canadian model G ........ European model
CD (CD DIRECT AMP ON, Input shorted, 195mV) . . . . . . 110 dB or more R ........ General model E ........ South European model
Residual Noise (IHF-A Network) / T ........ Chinese model L ........ Singapore model
CD DIRECT AMP ON . . . . . . . . . . . . . . . . . . . . . 35 µV or less K ........ Korean model J ........ Japanese model
A ........ Australian model
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
Gain Tracking Error /
0 to -60 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 dB or less




7
AX-497




(7/8")
DIMENSIONS




21.5

390 (15-3/8")
350 (13-3/4")
18.5
(3/4")
130 (5-1/8")
AX-497




151 (5-15/16")




435 (17-1/8")
21
(13/16")




Unit : mm (inch)




s INTERNAL VIEW
q w e r t y u i
q MAIN (2) P.C.B.
w MAIN (4) P.C.B. (R, L models)
e MAIN (5) P.C.B.
r MAIN (1) P.C.B.
t MAIN (6) P.C.B.
y MAIN (3) P.C.B.
u FUNCTION (4) P.C.B.
i FUNCTION (5) P.C.B.
o FUNCTION (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.

o !0 !1 !2
!5 FUNCTION (11) P.C.B.
!6 FUNCTION (2) P.C.B.
!7 FUNCTION (9) P.C.B.
o !3 !4 !5 !2 !6
!8 FUNCTION (3) P.C.B.




!7 !0 !1 !8
8
AX-497




s DISASSEMBLY PROCEDURES
· Remove parts in disassembly order as numbered.
· Disconnect the power cable from the AC outlet.

1. Removal of Top Cover
a. Remove 4 screws ( q ), 1 screw ( w ) and 4 screws ( q w e
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) r
c. Remove 7 screws ( t ) and then remove the Front
Panel Unit. (Fig. 1) t




DPX-1200
AX-497
3. Removal of Plate Side
Remove 2 push rivets ( y ) and then remove the Plate
Side L/R. (Fig. 1) y
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 u
Unit forward. (Fig. 1) i
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)


e
Top Cover
q

e
Sub Chassis Unit
w



CB681

CB581 u
t CB532 CB302

i r CB306 q
Support Top CB221
Plate Side L CB226
y
Knob
t i




Front Panel Unit
Plate Side R


y
Fig. 1


9
AX-497



5. Removal of Amp Unit
a. Remove 1 screw ( o ) attaching the Impedance o
Selector. (Fig. 2)
b. Remove 2 screws ( !0 ) attaching the Speaker Termnal. !0
(Fig. 2)
c. Remove 2 screws ( !1 ) and then remove the MAIN (4) !1
P.C.B. (Fig. 2) (R, L models only)
d. Remove 2 screws ( !2 ) and 2 screws ( !3 ). (Fig. 2) !2 !3
e. Remove connectors CB3 and CB151. (Fig. 2)
f. Remove the Amp Unit. (Fig. 2)




Impedance Selector
Amp Unit !3
!3
AX-497




CB3

!2 Speaker Terminal




CB151
MAIN (4) P.C.B.

!1
o
!0




Fig. 2




10
AX-497




s ADJUSTMENT

q CONFIRMATION OF IDLING CURRENT q
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.




DPX-1200
AX-497
R64 (L ch) Cut
R65 (R ch)




0.1mV­10mV R51 (L ch)
R52 (R ch)




R64 R65



R51 R52




11
AX-397




s IC DATA
IC301 : M38503G4A-101FP (FUNCTION (1) P.C.B.)
8-bit Microprocessor
VCC 1 42 P30/AN0
VREF 2 41 P31/AN1
AVSS 3 40 P32/AN2
P44/INT3/PWM 4 39 P33/AN3
P43/INT2/SCMP2 5 38 P34/AN4
P42/INT1 6 37 P00/SIN2
P41/INT0 7 36 P01/SOUT2
P40/CNTR1 8 35 P02/SCLK2
P27/CNTR0/SRDY1 9 34 P03/SRDY2
P26/SCLK1 10 33 P04/(AN5)
P25/TXD 11 32 P05/(AN6)
P24/RXD 12 31 P06/(AN7)
P23 13 30 P07/(AN8)
P22 14 29 P10/(LED0)
CNVSS 15 28 P11/(LED1)
P21/XCIN 16 27 P12/(LED2)
P20/XCOUT 17 26 P13/(LED3)
RESET 18 25 P14/(LED4)
XIN 19 24 P15/(LED5)
XOUT 20 23 P16/(LED6)
VSS 21 22 P17/(LED7)




No. Port Name I/O Function
1 VCC MCU Power Supply, +5V
2 VREF MCU AD Reference
3 AVSS MCU AD Ground
4 P44/INT3/PWM PD I Power Down Detect
5 P43/INT2/SCMP2 TPM/PD I Tape Monitor /Pure Direct SW
6 P42/INT1 PS I SYSTEM Power SW
7 P41/INT0 REM I Remote Control (Wake up)
8 P40/CNTR1 PRINH I Release the Protection
AX-397




9 P27/CNTR0//SRDY1 CEI O Chip Enable (INPUT SEL)
10 P26/SCLK1 CK O Clock
11 P25/TXD DATA O Data
12 P24/RXD TMO/DEST O/I Tape Monitor (397)/Destination Distinction (497)
13 P23 VRUP O Motor Volume (UP)
14 P22 VRDN O Motor Volume (DOWN)
15 CNVSS CNVSS MCU Vss: when single chip mode is used, Vcc: when flash writing is used
16 P21/XCIN D43 I AX-497/397 Detect
17 P20/XCOUT CDM O CD Direct Mute
18 /RESET MCU Reset
19 XIN MCU Oscillator In
20 XOUT MCU Oscillator Out
21 VSS MCU Ground
22 P17/(LED7) LEDA O LED (AUX)
23 P16/(LED6) LEDTP O LED (TAPE)
24 P15/(LED5) LEDM O LED (MD)
25 P14/(LED4) LEDC O LED (CD)
26 P13/(LED3) LEDT O LED (TUNER)
27 P12/(LED2) LEDP O LED (PHONO)
28 P11/(LED1) LSBY O LED (POWER)
29 P10/(LED0) LEDCDD O LED (CD DIRECT)
30 P07(AN8) LEDTM/PD O LED (TAPE MONITOR/PURE DIRECT)
31 P06(AN7) ENL I Rotary Encoder (Left)
32 P05(AN6) ENR I Rotary Encoder (Right)
33 P04(AN5) MUTE O Mute
34 P03//SRDY2 CDD I CD Direct SW
35 P02/SCLK2 PRI I Protection (Overload)
36 P01/SOUT2 RYSP O Speaker Relay
37 P00/SIN2 RYPS O Power Relay
38 P34/AN4 PRDC I Protection (DC)
39 P33/AN3 PRPS I Protection (Power Supply)
40 P32/AN2 THMR I Protection (Temperature Detection)
41 P31/AN1 THML I Protection (Temperature Detection)
42 P30/AN0 REC I Rec Out Selector Detect


12
CD/DVD DIRECT AMP
CD/DVD DIRECT AMP
SW301
IC502 Q451,452 POWER AMP
ON VR421 Q5--30
CD/DVD 10dB IC531,532 ON RY2
IC302 Q1,2
OFF
LOUDNESS SP A
OFF 10dB BALANCE
­10dB RY3
TONE CONTROL OFF 33.5dB
ON
VR531­534 SP B
PHONO EQ AMP PURE DIRECT RY1
M SW302
IC501 CD-D
MUTE PHONES
PHONO MOTOR IC421 MAIN
INPUT DRIVER MUTE
SELECTOR
Main VR
s BLOCK DIAGRAM




IC451
IC454 A LB
PD RYSP
TUNER B

IC457 SW581

AUX CDD
Q26
IC455 Q27
TAPE D15­18
IN + Q25
15 Q3
TAPE
+
OUT ­15 Q4
IC456
REC OUT SW4
MD B RY151
SELECTOR + D20
IN IC452

MD
OUT CD-D MAIN +
MUTE MUTE
­B
XL301 D19
4MHz LB
Q303 Q305 +

T151 SW681




Protection
PD
CDD
D153­156




Main VR




SERIAL DATA
(Input & Rec Out)
12S
+ POWER
19 20 11 13,14 35,38­41 5 34 17 33 36 RYSP
Microprocessor IC301
37 RYPS
6 7 31,32 42 Q151
(Power ON/OFF)


STANDBY Remote Control Input Select Rec Out Selector RYPS
/ON U631 SW622 SW531
SW621
AX-497




13
DPX-1200
AX-497
AX-497




s PIN CONNECTION DIAGRAM

q ICs

LM61CIZ NJM2068MD-TE2 NJU7312AM M38503G4A-101FP
NJU7313AM LB1641

22
16

21
5 10
15
42
8 30
3: GND 4
2: Vout 1 1
1: +Vs 1 1




q Transistors

2SA933AS (R, S) 2SA970 (GR, BL) 2SA2168 (S, T)
2SD1915F (S, T) 2SA1015 (Y) 2SC5291 (S, T)
2SC1704S (Q, R, S) 2SA1145 (O, Y)
AX-497




2SC1815 (Y)
2SC2705 (O, Y)
2SC2N5551C-AT
2SA2N5401C-AT
B
E
C C
E B EC
B


2SA2151 (O, P, Y)
2SC4488 (S, T) 2SB1274 (Q, R, S) 2SC6011 (O, P, Y)
2SA1037K (Q, R, S) 2SD1913 (R, S) 2SC4466 (O, P, Y)
DTC114EKA
DTC144EKA


C

E B B
C B C
B E CE E




q Diodes
1SS133 1SS355 S5VB20
1SS139 MA8039-L
1SS140 MA8047-L
1SS176 MA8051-M
1SS270A Anode MA8062-M
HZS12B2TD MA8068-L Anode
HZS162TD


Cathode Cathode




14
A B C D E F G H
AX-497


s PRINTED CIRCUIT BOARD (Foil side)
1

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


FUNCTION (8) FUNCTION (4) 1
FUNCTION (3) P.C.B. CB601 W451 2 CH1

(Side B) Lead Free Solder Used


MAIN (3)
CB201 2 CH2
21 1



2
22 42




3
FUNCTION (11) MAIN (5) CB221
FUNCTION (3) P.C.B. CB641
MAIN (6) CB226
(Side A)
FUNCTION (2) P.C.B. 8 5


(Side A)
1 4
1 10

FUNCTION (6) CB531




4




CD/DVD DIRECT AMP PURE DIRECT




VOLUME
Point w
Point q (Pin 20 of IC301)
CH 1 : Emitter of Q309
5 CH 2 : Collector of Q304





AC POWER ON AC POWER OFF AC POWER ON
(Connect the power cable) (Disconnect the power cable) (Connect the power cable)



15
6
A B C D E F G H
AX-497


s PRINTED CIRCUIT BOARD (Foil side)
1

FUNCTION (5) P.C.B. FUNCTION (5) P.C.B.
(Side A) (Side B) Lead Free Solder Used



CD/DVD




8
1
4



5
2




1


8
5
4
PHONO




3

FUNCTION (4) P.C.B. FUNCTION (4) P.C.B.
(Side A) (Side B) Lead Free Solder Used




1




8
TUNER




4




5
1


8
IN




15
16




5
4
4
TAPE

OUT




30




1
FUNCTION (1)




IN




1



8
CB302




4



5
MD




15
16
OUT




30




1




1




8
AUX




4




5
5




16
6
A B C D E F G H
AX-497


s PRINTED CIRCUIT BOARD (Foil side)
1

FUNCTION (6) P.C.B. FUNCTION (6) P.C.B.
(Side A) (Side B) Lead Free Solder Used
MAIN (1)
W2




4 1




FUNCTION (1) CB304 8 5
5 8



2
1 4




BASS TREBLE BALANCE LOUDNESS REC OUT
3



FUNCTION (8) P.C.B.
(Side A)
FUNCTION (1)
CB305

FUNCTION (7) P.C.B.
(Side A)
MAIN (1) FUNCTION (10)
CB1 CB631

4

PHONO TUNER CD/DVD TAPE MD AUX




FUNCTION (8) P.C.B.
(Side B) Lead Free Solder Used
B A
5
SPEAKERS
PHONES




17
6
A B C D E F G H
AX-497


s PRINTED CIRCUIT BOARD (Foil side)
1

FUNCTION (9) P.C.B. FUNCTION (10) P.C.B. FUNCTION (11) P.C.B.
(Side A) (Side A) (Side A)
PURE DIRECT CD/DVD DIRECT AMP



STANDBY FUNCTION (1)
CB303

FUNC