XM-GTX6020, XM-GTX6022 - Sony Car Audio Service Manual (repair manual). Page 10

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XM-GTX6020/GTX6022
XM-GTX6020/GTX6022
10
10
THIS  NOTE  IS  COMMON  FOR  PRINTED  WIRING  
BOARDS  AND  SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed 
in each block.)
For Printed Wiring Boards.
Note:
•  X : Parts extracted from the component side.
• 
 : Pattern from the side which enables seeing.
For Schematic Diagrams.
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 for Replacement of the Transistors
The transistors Q110, 111, 210 and 211 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
Q111, 211
P
2SC5100-P
(Part No. 8-729-024-79)
2SA1908-P
(Part No. 8-872-024-76)
Y
2SC5100-Y
(Part No. 8-729-024-80)
2SA1908-Y
(Part No. 8-872-024-77)
DISCRIMINATION:
• Waveform
Note: The components identifi ed by mark 0 or dotted 
line with mark 0 are critical for safety. 
 
Replace only with part number specifi ed.
A1908: 2SA1908
C5100: 2SC5100
P: RANK P
Y: RANK Y
1
 IC901 
5 (CT)
1 V/DIV, 10 
Psec/DIV
3 Vp-p
20 
Psec
OSC
REF 5V
ERROR
ERROR
0.1V
Q1
Q2
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7 8
NON
INV
VREF
VCC
C2
E1
E2
OUT
+IN
-IN
COMPEN
CT
RT
C1
GND
TIME
•  Note for Replacement of the IC901
Two different types of parts are used for the IC901 of this set.
Check the product code printed on the top face of the IC when 
replacing the IC901.
TYPE A : TL594I
TYPE B : C494GS
Ref. No.
TYPE A
TYPE B
IC901
TL594INSR
μPC494GS-E2-A
R913
24 k
Ω
22 k
Ω
•  IC Block Diagram
IC901  TL594INSR (TYPE A)
IC901  
μPC494GS-E2-A (TYPE B)
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