Diagrams; Block Diagram - Sony XM-554ZR Service Manual

3-1. BLOCK DIAGRAM

CN902 (1/2)
-1
L
FRONT
-2
R
D906
FL
INPUT
CN901
HIGH FR
LEVEL D907
INPUT/
SENSING
RL
POWER ON
RR
CN902 (2/2)
-3
L
(L+R)
REAR
-4
R
(L+R)
F901
CN905
25A
B+
+12V
SWITCH
Q905
F902
25A
OVER
VOLTAGE
DETECT
Q907
GND
POWER
REM ON/OFF
Q906
XM-554ZR
SECTION 3

DIAGRAMS

PRE AMP
IC801 (1/2)
HPF
3
1
IC803 (1/2)
2
2
1
HPF
3
PRE AMP
IC801 (2/2)
HPF
6
7
IC803 (2/2)
5
6
7
HPF
5
PRE AMP
IC802 (1/2)
3 IC804 (1/2)
1 LPF
2
2
3
SW802-1
SW802
LPF
(80Hz)
PRE AMP
IC802 (2/2) (REAR)
OFF ON
6
IC804 (2/2)
7 LPF
5
3 6
5
SW802-2
PROTECTOR
DETECT
Q901,902
DC DET
IC902
TEMP.DET
BUFFER
TH901-903
Q904
D901
D905
THERMAL DET
Q914,915
D902
LED DRIVER
Q903
G R
(POWER) (PROTECTOR)
LED901
POWER/
PROTECTOR
(FRONT)
GAIN CONTROL AMP
IC805 (1/2)
VR801-1
2 1
SW801-1
VR801
LEVEL
SW801
ON (FRONT)
HPF
GAIN CONTROL AMP
(80Hz)
IC805 (2/2)
OFF
(FRONT)
VR801-2
6 7
SW801-2
(REAR)
LPF
GAIN CONTROL AMP
IC806 (1/2)
VR802-1
1 2 1
VR802
LEVEL
(REAR)
LPF
GAIN CONTROL AMP
IC806 (2/2)
VR802-2
7 6 7
MUTE
CONTROL
Q802
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
9 9
MUTE
SWITCH
Q101
DIFFERENTIAL DRIVE DRIVE POWER
AMP AMP AMP AMP
Q103 Q104 Q108 Q110
MUTE BIAS
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 POWER
DRIVE
AMP AMP AMP
AMP
Q403 Q408 Q410
Q404
MUTE
CONTROL BIAS
Q812 Q406,407
DIFFERENTIAL DRIVE DRIVE POWER
AMP AMP AMP AMP
Q402 Q405 Q409 Q411
OVERLOAD
PROTECT
(REAR)
Q805,806
D803
RECT
+30V
• Signal path
+15V REG
+15V
Q807
D804
RECT
–30V
–15V REG
–15V
Q808
XM-554ZR
CN903
OVERLOAD
DET FRONT
SPEAKER
Q112
OUT
L
OVERLOAD
DET
Q212
R
CN904
OVERLOAD
DET REAR
SPEAKER
Q312
OUT
L
(L+R)
OVERLOAD
DET
Q412
R
OVERLOAD
PROTECT
(FRONT)
Q803,804
: AUDIO