Read Sony XM-7547 Service Manual online
XM-7547
10
10
5-4. PRINTED WIRING BOARD – LED/FILTER SECTION –
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
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
specified.
•
C
: panel designation.
•
U
: B+ Line.
• Powr voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REMOTE terminals.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark: POWER ON
no mark: POWER ON
*
: Impossible to mersure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: AUDIO
For printed wiring boards.
Note:
• X
: parts extracted from the component side.
5-3. IC BLOCK DIAGRAM
• POWER section
IC902, 904
µ
PC494G2
4
1
2
3
5
6
7 8
9
10
16 15
14
13
12 11
ERROR
0.1V
REG.
REF.
OSC
ERROR
• Semiconductor
Location
Ref. No.
Location
IC803
C-3
IC804
B-3
IC805
B-2
IC809
C-5
IC810
B-6
IC811
B-6
• Semiconductor
Location
Ref. No.
Location
D801
A-4
D802
A-4
D803
A-2
D804
A-3
D805
A-1
Q801
A-2
Q802
A-3
Q803
A-1
A
B
C
1
2
3
4
5
6
7
R489
R289
R387
R487
C354
JW102
R486
R383
R183
R187
R287
R286
R484
R483
R481
R482
R485
C451
R284 R282
R285
C251
R490
R382
R384
R385
C351
R389
R386
R182
R184
R185
C151
R290
R283
R281
R390
R381
R181
R186
R190
R189
IC811
IC810
IC809
IC804
IC803
IC805
JW117
1-675-246-
11
09
FILTER BOARD
JW104
JW103
JW105
JW106
JW107
C452
C454
JW101
S802
JW1
1
8
CNJ809
C453
C455
JW1
1
9
JW120
JW111
JW1
1
0
JW109
JW116
JW115
C352
C753
C754
C357
C356
JW121
JW122
C457
C456
JW114
JW113
JW112
C355
C353
S804
VR806
JW108
JW125
JW137
C254
C154
JW138
JW129
JW130
JW123
JW124
JW128
JW131
JW139
JW140
JW141
JW142
C751
C752
JW126
JW127
JW143
JW136
JW135
JW134
JW133
JW132
C252
C157
C256
C257
C156
C153
C253
C255
C155
C152
CNJ808
VR805
S803
S801
1
9
1
9
C
(Page 12)
S801
FILTER
(X1 X10)
VR805
FILTER
(50Hz — 400Hz)
S803
FILTER
(LPF OFF HPF)
S804
FILTER
(X1 X10)
VR806
FILTER
(50Hz — 400Hz)
S802
FILTER
(LPF OFF HPF)
AMPLIFIER BOARD
CNP808
B
(Page 12)
AMPLIFIER BOARD
CNP809
1
A
2
3
4
09
1-675-245-
LED BOARD
11
CNB804
G
G
R
G
G
R
G
E
E
E
R
G
D802
D801
D803
D804
D805
1
7
D
(Page 16)
HI-CURRENT
POWER BOARD
CNP804
BLK +B
BLU GND
BLU
TH
BLU CFFS
BLU O-C
BLU H-V
BLU H-C
R815
R812
R81
1
Q803
R814
R808
R807
R806
R805
Q802
R813
R804
R803
R802
R810
R809
R801
Q801
D804
D803
D805
THERMAL
OFFSET
OVER CURRENT
D801
HI-VOLTAGE
POWER/PROTECTOR
MODE
D802
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