XM-ZR4A (serv.man2) - Sony Car Audio Service Manual (repair manual). Page 2

•  A : B+ Line.
•  B : B– Line.
•  H : adjustment for repair.
•  Power voltage is dc 14.4V and fed with regulated dc 
  power supply from +12V and REM terminals.
•  Voltages is dc with respect to ground under no-signal 
 conditions.
  no mark : POWER ON
       

*

  : Impossible to measure

•  Voltages are taken with a VOM (Input impedance 10M

Ω) .

  Voltage variations may be noted due to normal production 

tolerances

•  Waveforms are taken with a oscilloscope.
  Voltage variations may be noted due to normal production 

tolerances.

•  Circled number refer to waveforms.

• Signal path.
  F : 

AUDIO

•  X : Parts extracted from the component side.
• 

 : Pattern from the side which enables seeing.

•  All capacitors are in 

μF unless otherwise noted. (p: pF) 

50 WV or less are not indicated except for electrolytics 
and tantalums.

•  All resistors are in 

Ω and 

1

/

4

 W or less unless otherwise 

specifi ed.

• 

The transistors Q110, 111, 210, 211, 310, 311, 316, 317, 410, 411, 
416 and 417 have two different ranks: P rank and Y rank.
The rank of these transistors need to be selected properly
according to each channel. When replacing any one of these 
transistors, check its rank and replace with the appropriate 
transistor of the same rank.

Rank

Q110, 210, 310,

  316, 410, 416

Q111, 211, 311,

  317, 411, 417

P

2SC5100-P

(8-729-024-79)

2SA1908-P

(8-872-024-76)

Y

2SC5100-Y

(8-729-024-80)

2SA1908-Y

(8-872-024-77)

Note: 
The components identi-
fi ed by mark 0 or dotted 
line with mark 0 are criti-
cal for safety. 
Replace only with part 
number specifi ed.

Note: 
Les composants identifi és 
par une marque 0 sont 
critiques pour la sécurité. 
Ne les remplacer que par 
une piéce portant le nu-
méro spécifi é.