XM-GTX6040, XM-GTX6042 (serv.man2) - Sony Car Audio Service Manual (repair manual). Page 2

Note:
• 

X : Parts extracted from the component side.

• 

 : Pattern from the side which enables seeing.

•  Indication of transistor.

 

Note:
•  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.

• 

A : B+ Line.

• 

B : B– Line.

• 

H : Adjustment for repair.

•  Power voltage is dc 14.4 V and fed with regulated dc 

power supply from +12 V and REM terminals.

•  Voltages are dc with respect to ground under no-signal  

conditions.

•  Voltages are taken with VOM (Input impedance 10 M

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 numbers refer to waveforms.

•  Signal path.
 

F 

: AUDIO

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 pièce portant le nu-
méro spécifi é.

•  Note for Replacement of the Transistors
The transistors Q110, 111, 210, 211, 310, 311, 410 and 411 have 
two different ranks: P rank and Y rank.
The rank of these transistors need to be selected properly accord-
ing 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, 410

Q111, 211, 311, 411

P

2SC5100-P

(Part No. 8-729-024-79)

2SA1908-P

(Part No. 8-729-024-76)

Y

2SC5100-Y

(Part No. 8-729-024-80)

2SA1908-Y

(Part No. 8-729-024-77)

•  Note for Replacement of the IC903
Two different types of parts are used for the IC903 of this set.
Check the product code printed on the top face of the IC when 
replacing the IC903.

Ref. No.

TYPE A

TYPE B

IC903

TL594INSR

μPC494GS-E2-A

R911

24 k

Ω

22 k

Ω

UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution:  Some printed circuit boards may not come printed with 

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.
•  Unleaded solder melts at a temperature about 40 °C higher 

than ordinary solder.

 

Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.

 

Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if 

the heated tip is applied for too long, so be careful!

• 

Strong viscosity

 

Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.

• 

Usable with ordinary solder

 

It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.