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Ic Block Diagram; Printed Wiring Board - Led/Filter Section - Sony XM-7547 Service Manual

Stereo power amplifer
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XM-7547
THIS NOTE IS COMMON FOR PRINTED WIRING
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
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1
/
W or less unless otherwise
4
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
: Impossible to mersure
*
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• 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 µPC494G2
16 15
14
13
12 11
10
9
REG.
REF.
ERROR
ERROR
0.1V
OSC
1
2
3
4
5
6
7 8
5-4. PRINTED WIRING BOARD – LED/FILTER SECTION –
FILTER BOARD
S801
A
VR805
R187
C254
C154
R286
JW137
C
AMPLIFIER BOARD
1
CNP808
JW138
(Page 12)
C155
B
R287
JW139
JW131
JW140
JW141
IC805
C253
9
CNJ808
C
1
2
09
S801
VR805
FILTER
FILTER
(X1
X10)
(50Hz — 400Hz)
• Semiconductor
Location
Ref. No.
Location
IC803
C-3
IC804
B-3
IC805
B-2
IC809
C-5
IC810
B-6
IC811
B-6
A
09
10
10
JW125
JW108
S803
S804
R289
R489
JW123
JW111
C153
R182
R382
R184
JW129
C156
R384
C356
R185
R385
JW130
C151
JW115
R183
C351
R383
IC804
JW124
JW116
IC809
IC803
JW128
JW117
C255
R290
R490
R481
C251
C451
R285
R485
R483
R284 R282
R482
R484
3
4
5
S803
S804
FILTER
FILTER
(LPF
OFF
HPF)
(LPF
OFF
LED BOARD
E
R810
R809
D804
R802
R
G
R
G
D803
R
G G
E
E
D805
1
2
3
D804
D805
D803
OVER CURRENT
HI-VOLTAGE
THERMAL
OFFSET
POWER/PROTECTOR
S802
VR806
R387
C452
C354
R487
JW103
B
1
AMPLIFIER BOARD
CNP809
JW104
C353
(Page 12)
C355
JW113
R486
JW114
JW105
JW112
JW106
IC810
IC811
JW107
C455
C453
9
CNJ809
11
1-675-246-
6
7
VR806
S802
FILTER
FILTER
HPF)
(50Hz — 400Hz)
(X1
X10)
D
POWER BOARD
• Semiconductor
CNP804
(Page 16)
Location
1
7
Ref. No.
CNB804
D801
D802
G
G
D802
D803
11
D801
D804
1-675-245-
4
D805
D801
D802
Q801
HI-CURRENT
Q802
MODE
Q803
Location
A-4
A-4
A-2
A-3
A-1
A-2
A-3
A-1

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