Read Sony XM-4S Service Manual online
11
11
XM-4S
XM-4S
3-1. BLOCK DIAGRAM
5
6
7
PRE AMP
IC801 (2/2)
GAIN CONTROL AMP
IC805 (2/2)
HPF
IC803 (2/2)
DIFFERENTIAL
AMP
Q103
POWER
AMP
Q110
DRIVE
AMP
Q104
DIFFERENTIAL
AMP
Q102
POWER
AMP
Q111
DRIVE
AMP
Q105
BIAS
Q106,107
BIAS
Q206,207
CN902 (1/2)
CN901
MUTE
SWITCH
Q101
+12V
GND
9
PRE AMP
IC801 (1/2)
DIFFERENTIAL
AMP
Q203
POWER
AMP
Q210
DRIVE
AMP
Q204
DIFFERENTIAL
AMP
Q202
MUTE
CONTROL
Q802
POWER
AMP
Q211
DRIVE
AMP
Q205
-3
-2
-4
L
R
L
R
-1
L
(FRONT)
INPUT
(FRONT)
D907
D906
(REAR)
R
CN903
L
R
MUTE
SWITCH
Q201
1
2
14
12
REF.
REG
REG
CN904 (1/2)
F901
40A
SWITCHING
DRIVER
Q910,911
SWITCHING
DRIVER
Q912,913
DRIVER
Q908,909
8
10
11
3
FRONT
SPEAKER
OUT
DC-DC
CONVERTER
TRANSFORMER
T901
DC-DC CONVERTER
IC903
B+
SWITCH
Q905
OVERLOAD
DET
Q112
OVERLOAD
DET
Q212
CN904 (2/2)
L
(L+R)
R
REAR
SPEAKER
OUT
2
3
CN902 (2/2)
L
RL
REM
+15V REG
Q807
–15V REG
Q808
PROTECTOR
DRIVE
Q901,902
OVERLOAD
PROTECT
(REAR)
Q805,806
OVERLOAD
PROTECT
(FRONT)
Q803,804
POWER
ON/OFF
Q906
MUTE CONTROL
IC902
+27V
+15V
–27V
+30V
–30V
–15V
RECT
D803
D803
VR803-2
(FRONT)
(REAR)
SENSING
POWER ON
HIGH
LEVEL
INPUT
INPUT
PRE AMP
IC802 (2/2)
7
LPF
IC804 (2/2)
GAIN CONTROL AMP
IC806 (2/2)
DIFFERENTIAL
AMP
Q303
POWER
AMP
Q310
DRIVE
AMP
Q304
DIFFERENTIAL
AMP
Q302
POWER
AMP
Q311
DRIVE
AMP
Q305
MUTE
SWITCH
Q301
PRE AMP
IC802 (1/2)
3
1
LPF
IC804 (1/2)
DIFFERENTIAL
AMP
Q403
POWER
AMP
Q410
DRIVE
AMP
Q404
DIFFERENTIAL
AMP
Q402
POWER
AMP
Q411
DRIVE
AMP
Q108
DRIVE
AMP
Q109
DRIVE
AMP
Q208
DRIVE
AMP
Q209
DRIVE
AMP
Q308
DRIVE
AMP
Q309
DRIVE
AMP
Q408
DRIVE
AMP
Q409
DRIVE
AMP
Q405
MUTE
SWITCH
Q401
OVERLOAD
DET
Q412
2
OVERLOAD
DET
Q312
5
6
3
TEMP.DET
TH901,904,905
THERMAL DET
Q914,915
VCC
REF
D905
D901
OFF
ON
LED800,801
(BLUE ILLUMINATION)
LED803,804
(ILLUMINATION)
LED802
(PROTECTOR)
SW803
BLUE ILLUMINATION (REAR)
D902
OVER
VOLTAGE
DETECT
Q907
6
HPF
5
6
1
1
GAIN CONTROL AMP
IC805 (1/2)
HPF
IC803 (1/2)
2
HPF
LPF
3
2
LPF
6
5
2
1
GAIN CONTROL AMP
IC806 (1/2)
BOOSTER AMP
IC807 (2/2)
BOOSTER AMP
IC807 (1/2)
6
7
2
3
MUTE
CONTROL
Q810
MUTE
CONTROL
Q809
MUTE
CONTROL
Q811
MUTE
CONTROL
Q812
15
16
7
1
7
1
BIAS
Q306,307
BIAS
Q406,407
VR801-1
VR801-2
VR802-1
VR802-2
SW801-1
SW801-2
VR801
LEVEL
(FRONT)
ON
OFF
VR802
LEVEL
(REAR)
VR803
LOW BOOST (40Hz)
(REAR)
SW801
HPF
(80Hz)
(FRONT)
OFF
ON
SW802
SW802-1
SW802-2
LPF
(80Hz)
(REAR)
3
1
2
• Signal path
: AUDIO
: AUDIO
BOOSTER
CONTROL
CONTROL
Q400
VR803-1
5
7
6
BOOSTER
CONTROL
CONTROL
Q300
LED DRIVER
Q903
FAN901
DC FAN
DC FAN
DC FAN
CONTROL
Q917,919
THERMAL DET
Q916,920
DC FAN
ON/OFF
ON/OFF
Q918
(REAR)
(L+R)
RECT
D808
D808
RECT
D809
D809
RECT
D804
D804
7
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