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Block Diagram - Sony XM-4S Service Manual

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3-1. BLOCK DIAGRAM

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

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