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

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