Sony XM-754SX Service Manual ▷ View online
9
9
XM-754SX
3
2
1
5
6
7
3
2
1
3
2
1
3
1
6
7
2
1
PRE AMP
IC801 (1/2)
PRE AMP
IC802 (1/2)
5
6
7
3
2
1
LOW BOOST
IC806 (2/2)
GAIN AMP
IC806 (1/2)
H.P.F
IC803 (1/2)
L.P.F
IC804 (2/2)
L.P.F
IC804 (1/2)
DIFFERENTIAL
AMP
Q103
POWER
AMP
Q109
DRIVE
AMP
Q107
DIFFERENTIAL
AMP
Q104
POWER
AMP
Q110
DRIVE
AMP
Q108
BIAS
Q111
LEVEL
SHIFT
Q101
LEVEL
FILTER
S801-1
LPF
OFF
HPF
LEVEL
RV802-1
LOW
BOOST
B+
(+14.2V)
B–
(–14.2V)
B+
(+14.2V)
B–
(–14.2V)
CNJ100-1
CNJ100-2
CN101
RV801-1
FILTER
RV801-3
FILTER
RV803-1
LINE
SWITCH
Q102
+12V
GND
10
7
5
6
7
5
7
2
1
6
7
PRE AMP
IC801 (2/2)
PRE AMP
IC802 (2/2)
5
6
7
3
2
1
LOW BOOST
IC807 (2/2)
GAIN AMP
IC807 (1/2)
H.P.F
IC803 (2/2)
L.P.F
IC805 (1/2)
L.P.F
IC805 (2/2)
DIFFERENTIAL
AMP
Q203
POWER
AMP
Q209
DRIVE
AMP
Q207
DIFFERENTIAL
AMP
Q204
SWITCH
CONTROL
Q801,802
POWER
AMP
Q210
DRIVE
AMP
Q208
BIAS
Q211
LEVEL
SHIFT
Q201
RV802-2
LOW
BOOST
RV801-2
FILTER
RV801-4
FILTER
L
HIGH
LEVEL
INPUT
(FRONT)
R
L
(BTL)
(FRONT)
INPUT
(REAR)
INPUT
R
CN810
L
BTL
R
RV803-2
LINE
SWITCH
Q202
RV204
BIAS
RV104
BIAS
15
16
1
2
14
12
TEMP.DET
THN801,804-807,
THP802,803
REF.
REG
REG
CN800
F901
40A
INVERTER
Q904,905
INVERTER
Q906,907
DRIVER
Q908
DRIVER
Q909
11
9
8
3
D811
THERMAL
D810
OFFSET
(PROTECTOR)
FRONT
SPEAKER
OUT
D808
POWER
D809
OVER
CURRENT
SW805
TEST
TONE
DC-DC
CONVERTER
TRANSFORMER
T801
DC-DC CONVERTER
IC901
SWITCH
Q808
• Signal path
: AUDIO
• Front-ch : same as Rear-ch
: AUDIO
• Front-ch : same as Rear-ch
2
1
REG
Q901,902
FILTER
S801-2
LPF
OFF
HPF
(40Hz)
(40Hz)
OVER LOAD
DET
Q112
OVER LOAD
DET
Q212
CN811
L
BTL
R
REAR
SPEAKER
OUT
6
5
CNJ100-3
CNJ100-4
CN201
L
(BTL)
R
REM
CN803
B+
REG
Q910
B–
REG
Q911
B+
(+23.5V)
B+
(+42V)
B+
(+36V)
B+
(+36V)
(–35V)
(–35V)
(–42V)
(–14.2V)
B –
B –
B –
B –
B+
(+14.2V)
LED DRIVE
Q812,813
D823
D822
D828
D829
LED DRIVE
Q810,811
OFFSET
DET
Q803-805
LED DRIVE
Q809
POWER
ON/OFF
Q903
DC DET
IC902
D903
D905
D906
D904
D917
D911
D912
D918
D905,906
RECT
D911,912
RECT
D903,904
RECT
D917,918
RECT
D909
D907
D908
D910
D907-910
RECT
TEST TONE
GENERATOR
IC815
(FRONT)
(REAR)
L
HIGH
LEVEL
INPUT
(REAR)
R
(PROTECTOR)
(PROTECTOR)
4-1. BLOCK DIAGRAM
SECTION 4
DIAGRAMS
10
10
XM-754SX
• IC Block Diagram
IC901 µPC494GS-T1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
OSC
REF. REG.
ERROR
ERROR
0.1V
Q111
F-11
Q112
E-12
Q201
G-7
Q202
D-7
Q203
D-10
Q204
D-9
Q207
D-10
Q208
D-10
Q209
C-11
Q210
D-11
Q211
D-11
Q212
C-12
Q301
G-4
Q302
F-3
Q303
D-3
Q304
D-4
Q307
D-3
Q308
D-3
Q309
C-1
Q310
D-1
Q311
D-1
Q312
C-1
Q401
G-4
Q402
F-3
Q403
E-3
Q404
E-4
Q407
E-3
Q408
E-3
Q409
E-1
Q410
F-1
Q411
F-1
Q412
F-1
Q801
E-7
Q802
E-7
Q803
B-12
Q804
B-12
Q805
C-12
Q809
G-10
Q810
G-12
Q811
G-12
Q812
G-12
Q813
G-12
Q901
F-9
Q902
F-9
Q903
G-9
Q904
A-8
Q905
A-7
Q906
A-6
Q907
A-5
Q908
A-7
Q909
A-6
Q910
E-6
Q911
E-5
D801
E-7
D802
E-7
D805
F-10
D812
E-7
D813
F-7
D822
F-12
D823
F-12
D824
F-12
D825
D-12
D826
D-1
D827
F-1
D828
G-11
D829
G-11
D901
G-9
D902
G-9
D903
D-6
D904
D-5
D905
D-7
D906
D-7
D907
A-9
D908
A-8
D909
A-4
D910
A-4
D911
D-7
D912
D-7
D913
E-6
D914
E-5
D917
D-5
D918
D-5
R141
F-12
R241
D-11
R341
D-1
R441
F-1
IC801
F-6
IC806
G-7
IC807
G-7
IC808
F-5
IC813
G-3
IC814
G-4
IC815
E-7
IC901
F-10
IC902
E-9
Q101
G-8
Q102
D-8
Q103
E-9
Q104
E-9
Q107
E-10
Q108
E-10
Q109
E-11
Q110
F-11
• Semiconductor Location (MAIN SECTION)
Ref. No.
Location
Ref. No.
Location
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
Note:
• 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.
•
%
: indicates tolerance.
• 2 : nonflammable resistor.
Note:
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specified.
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
• A : B+ Line.
• B : B– Line.
• Power voltage is dc 14.4V and fed with regulated dc power
• B : B– Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REM terminals.
• Voltage is dc with respect to ground under no-signal
condition.
• 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.
F
: AUDIO
for printed wiring boards:
Note:
• X : parts extracted from the component side.
•
Note:
• X : parts extracted from the component side.
•
: Pattern from the side which enables seeing.
11
11
XM-754SX
4-2. PRINTED WIRING BOARD — MAIN SECTION — • Refer to page 10 for Semiconductor Location and Common Note on Printed Wiring Boards.
(Page 15)
(Page 15)
(Page 15)
12
12
XM-754SX
17
18
GAIN
GAIN
GAIN
GAIN
4-3. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — • Refer to page 10 for Common Note on Schematic Diagrams.
(Page 13)
(Page 14)
(Page 14)
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