Read Sony XM-ZR1852 Service Manual online
9
9
XM-ZR1852
XM-ZR1852
3-1. BLOCK DIAGRAM
2
3
PRE AMP
IC301 (1/2)
2
3
GAIN CONTROL AMP
IC302 (1/2)
DIFFERENTIAL
AMP
Q104
PROTECTOR
Q105
POWER
AMP
Q113,116,119
OVERLOAD
DET
Q115,118,121
DRIVE
AMP
Q107
DRIVE
AMP
Q111
DIFFERENTIAL
AMP
Q103
POWER
AMP
Q114,117,120
DRIVE
AMP
Q108
DRIVE
AMP
Q112
BIAS
Q209,
210
MUTE
Q102
MUTE
Q202
CN902
D901
INPUT
L
(BTL)
SPEAKER OUT
L
R
SWITCH
Q101
REM
+12V
GND
9
DIFFERENTIAL
AMP
Q204
POWER
AMP
Q213,216,219
OVERLOAD
DET
Q215,218,221
DRIVE
AMP
Q207
DRIVE
AMP
Q211
DIFFERENTIAL
AMP
Q203
POWER
ON/OFF
Q903
POWER
AMP
Q214,217,220
DRIVE
AMP
Q208
DRIVE
AMP
Q212
CN901
L
HIGH LEVEL
INPUT/
SENSING POWER ON
R
SWITCH
Q201
OVERLOAD
PROTECT
Q309,310
Q309,310
15
1
2
14
12
B+
SWITCH
Q901
OVER VOLTAGE
DETECT
Q902
REF.
REG
REG
CN903 (2/2)
F901
DC DET
Q311
DC DET
IC903
DC DET
IC901
16
RECT
D302
D302
RECT
D303
D303
+15V
+50V
SWITCHING
DRIVER
Q909,911,913
SWITCHING
DRIVER
Q910,912,914
DRIVER
Q908
PROTECTOR
DETECT
Q904,905
DRIVER
Q907
8
10
11
LED901
POWER/
PROTECTOR
DC-DC
CONVERTER
TRANSFORMER
T901
DC-DC CONVERTER
IC902
• Signal path
: AUDIO
: AUDIO
CN903 (1/2)
BTL
-1
-2
LED DRIVER
Q906
R
(PROTECTOR)
LED902
(ILLUMINATION)
G
(POWER)
R
1
1
OFF
ON
SW301-1
VR301-1
SW301
LPF(80Hz)
30A
F902
30A
VR301
LEVEL
GAIN CONTROL AMP
IC303 (2/2)
PRE AMP
IC301 (2/2)
2
3
GAIN CONTROL AMP
IC303 (1/2)
1
2
3
THERMAL DET
IC304 (1/2)
1
7
CR
FILTER
TEMP.DET
TH302,303
TEMP.DET
TH301
DC DET
Q301
SW301-2
VR301-2
6
7
THERMAL DET
IC304 (2/2)
5
7
5
LPF
IC302 (2/2)
+15V REG
Q307
–15V
–50V
–15V REG
Q308
BIAS
Q109,
110
3
+50V
D903
6
7
+50V
PROTECTOR
Q106
–50V
PROTECTOR
Q205
+50V
PROTECTOR
Q206
–50V
5
6
SECTION 3
DIAGRAMS
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