Read Sony XM-GTX1852 Service Manual online
XM-GTX1852
8
SECTION 3
DIAGRAMS
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• Power voltage is dc 14.4V fed with regulated dc
power supply from +12V and REM terminals
• Voltages is dc respect to ground under no-signal
conditions.
• Voltages are taken dc with a VOM (Input impedance
• B : B– Line.
• H : adjustment for repair.
• Power voltage is dc 14.4V fed with regulated dc
power supply from +12V and REM terminals
• Voltages is dc respect to ground under no-signal
conditions.
• Voltages are taken dc 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
Voltage variations may be noted due to normal production
tolerances.
• Circled number refer to waveforms.
• Signal path.
F :
F :
AUDIO
for printed wiring boards:
• X : Parts extracted from the component side.
•
•
: Pattern from the side which enables seeing.
THIS NOTE IS COMMON FOR PRINTED WIR-
ING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
ING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
for schematic diagrams:
• All capacitors are in μF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω and
1
/
4
W or less unless otherwise
specifi ed.
Note:
The components identi-
fi
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.
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.
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 Q113, 114, 116, 117, 119, 120, 213, 214, 216, 217,
219 and 220 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.
219 and 220 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
Q113,116,119,
213,216,219
Q114,117,120,
214,217,220
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)
DISCRIMINATION:
A1908: 2SA1908
C5100: 2SC5100
C5100: 2SC5100
P: RANK P
Y: RANK Y
Y: RANK Y
• Waveform
• IC Block Diagram
IC902 TL594INSR
1
IC902
5 (CT)
1 V/DIV, 10 ȝsec/DIV
3.1 Vp-p
20 ȝVHF
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
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