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AV AMPLIFIER

DSP-A5
SERVICE MANUAL




IMPORTANT NOTICE
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 of 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 ........................................... 1 AMP ADJUSTMENT ..................................................... 19
REMOTE CONTROL PANELS ....................................... 1 IC DATA .................................................................. 20~28
REAR PANELS ............................................................... 2 DISPLAY DATA ........................................................... 29
SPECIFICATIONS ....................................................... 3~4 BLOCK DIAGRAM .................................................. 30~31
INTERNAL VIEW ............................................................ 5 PRINTED CIRCUIT BOARD ................................... 32~47
DISASSEMBLY PROCEDURES .................................... 5 SCHEMATIC DIAGRAM ......................................... 48~53
SELF DIAGNOSIS FUNCTION ................................ 6~17 PARTS LIST ............................................................ 54~69
FACTORY PRESET ...................................................... 18 REMOTE CONTROL TRANSMITTER ......................... 70




100712
DSP-A5


s BLOCK DIAGRAM
· See page E-49/J-47 SCHEMATIC DIAGRAM [INPUT (2/2)] · See page E-51/J-49 SCHEMATIC DIAGRAM [DSP] · See page E-53/J-51 · See page E-50/J-48 · See page E-52/J-50 SCHEMATIC DIAGRAM
INPUT SELECTOR INPUT SELECTOR
CONTROL CONTROL SCHEMATIC SCHEMATIC [MAIN (1/2)]
MAIN MAIN
COAXIAL SIGNAL DIAGRAM DIAGRAM POWER AMP POWER AMP
DETECTOR
IC371 [MAIN (2/2), [OPERATION]
6-CH PHONES
DIA DIB SELECTOR POWER] BASS TREBLE
VR581 VR582
MAIN Q506
Q511
Q521
Q526,Q529
IC10A IC102 VR401 VR583 LEVEL
32 33 IC103 Q512 Q527A/C
L+ 1 IC103 4 3
IC371 IC2 19 5 IC108B IC401A IC582A
24 7 L- 7 MAIN
COAXIAL 11 8 COAXIAL/OPTICAL 5 DIGITAL 2 4




SELECTOR SWITCH
8 18 6
DVD/LD SELECTOR 4 INPUT 7 13 5 DIR5 3 84 DAC 10 H.P.F 3 1 3 1 5 7 5 7 Q106 Q119 A
SELECTOR 9 11 5
OPTICAL IC373 3 L




SPEAKER
BALANCE
IC395 8 B
DIGITAL IC103 TONE Q507 Q522




-10dB
D/A
9 FORMAT CONVERTER IC10B IC103 CONTROL Q513 Q530,Q533 RY501
XL1 INTERFACE IC7 17
R+
3 30 IC103 27 26 IC581 Q514 Q531A/C
RECEIVER IC109B IC401B IC582B A
DIGITAL SIGNAL




COAXIAL SIGNAL 10 1
IC3 AC3D2av R- 29 27 R
DETECTOR 16 2
(24.576MHz) 21 H.P.F 3 1 5 7 3 1 3 1 Q107 Q120 B
IC372 20 26
DSP




SPEAKER RELAY
+ 23
IC103 SW711
DIGITAL/ IC108A
IC11A
IC372 PRO-LOGIC/ IC103




6 GANG MOTOR VOLUME
DTS FL SUB IC402A IC113 IC114A
27 5 7 6 7 26 CENTER




MUTING
COAXIAL 11 8 COAXIAL/OPTICAL DECODER WOOFER CENTER CENTER
CBL/SAT SELECTOR IC4 25 5 7 14 15 5 7 POWER AMP POWER AMP +




LEVEL CONTROL
OPTICAL IC374 1M SRAM YSS918D-F 45 6 27 Q508 Q523
Q515 Q534,Q537 ­




~

~
STATIC IC11B IC109A Q516 Q531A/C
D-TV OPTICAL 47 8
RAM




SPEAKERS
IC5 FR IC402B IC114B
28 3 1 6 7 5 CENTER
IC103 6 3 1 3 2 3 1 Q110 RY502
4

REAR REAR
INPUT SELECTOR IC8,9 29 CODEC IC110A POWER AMP POWER AMP REAR
L CONTROL CODEC DAC LFE IC403A IC112A (SURROUND)
20
2 TUNER ADC 9 85 24 5 7 8
31
R 9 3 1 2 5 7 Q114 +




LEVEL CONTROL
32 3
IC104A/B A/D 7 L
L 3 1 CONVERTER D/A
IC6(1/2) Q510 Q524 ­
PHONO CONVERTER IC110B Q538,Q541
IC6(2/2) Q519 RY503
R 5 7 Q520 Q539A/C
C IC403B IC112B ­
23 3 1 23
R
L 22 5 7 14 15 3 1 Q112 +
1 CD 24
R IC106A
IC13A IC111 L
1 3 4 2 Q509 Q525
TAPE MONITOR




MAIN
VIDEO L 25
RL
3 1
Q517 Q542,Q545
R
AUX 2 VR401 M Q518 Q543A/C
INPUT SELECTOR




IC106B
IC102




R
CENTER




OUTPUT
30 28
22 6 8
CEAC2
IC101




L
SCKD CLKAC CLKAC IC13B IC404
DVD/LD Q102
29 SI