Block Diagram - Amplifier Section - Sony XM-7557 Service Manual

XM-7557
5-1. BLOCK DIAGRAM – AMPLIFIER SECTION –
PRE AMP
IC703
CNJ701
FL 5 7
MONO-L
FR
L-CH
INPUT
PRE AMP
IC704
RL
5 7
MONO-R
RR
R-CH
CNJ710
9
TO
SUB 1
7
BOARD
CNB710 8
6
2
3
B+
5
B-
4
CNP805
8
TO
POWER
2
BOARD
CNB805
4
9
3
1
10
6
7
5
09
SECTION 5
DIAGRAMS
H.P.F H.P.F
LEVEL
IC702 IC709
FILTER
VR701
VR702
2 2
6 7 5 7 6
CNP702
CNJ702
FILTER BOARD
H.P.F H.P.F
IC702 IC710
LEVEL FILTER
CNP703
VR704 VR705
2 2
6 7 5 7 6
CNJ703
FAN CTL FAN DRIVER
Q702 Q701
CNP803 CNB803
POWER
CONTROL
POWER
Q703
DRIVE
Q704
TR BOARD
THERMAL
DET
TH701
AMPLIFIER BOARD
LINE SWITCH
LOWBOOST
LINE SWITCH
L.P.F L.P.F HPF CNJ702
IC701
IC708 IC707
FILTER 3 3
FLAT
5
VR702
7
7 6 7 6
LPF CNP702
FILTER
B+
S702
LEVEL SHIFT
Q101
X10,X1
S701
FILTER B-
LINE SWITCH
LOWBOOST
Q302
VR703
LOWBOOST
LINE SWITCH
CNJ703
L.P.F L.P.F HPF
IC706
IC711 IC712
FILTER 3 3
FLAT
5
VR705
7
7 6 7 6
LPF CNP703
FILTER
B+
S705
LEVEL SHIFT
X10,X1 Q301
S704 FILTER
B-
LOWBOOST
VR708
CNP708 CNJ708
B+
FN801
M
DC FAN MOTOR
D708
T701 +42V
+14V
INVERTER
D709
Q705
-14V
D710
INVERTER
Q706
-42V
D711
8 8
DIRECT
Q102
SW703
ON OFF DIFFERENTIAL POWER AMP
AMP (VOLTAGE STAGE)
Q104-105 Q108
Q103
POWER AMP
(FINAL STAGE)
BIAS
VR101,Q110
DIFFERENTIAL
POWER AMP
AMP (VOLTAGE STAGE) NFB ON
Q106-107 Q109
NFB OFF
RY701
DIRECT
SW706
ON OFF
DIFFERENTIAL POWER AMP
AMP (VOLTAGE STAGE)
Q304-305 Q308
POWER AMP
(FINAL STAGE)
BIAS
Q303
VR301,Q310
DIFFERENTIAL POWER AMP
AMP (VOLTAGE STAGE)
NFB ON
Q306-307 Q309
NFB OFF
RY702
DIFFERENTIAL POWER AMP
AMP (VOLTAGE STAGE)
Q504-505 Q507
POWER AMP
(FINAL STAGE)
BIAS
VR501,Q509
POWER AMP
DIFFERENTIAL
NFB ON
AMP (VOLTAGE STAGE)
Q505-506 Q508
NFB OFF
RY703(1/2)
DIFFERENTIAL POWER AMP
AMP (VOLTAGE STAGE)
Q512-513 Q516
POWER AMP
(FINAL STAGE)
BIAS
VR502,Q518
DIFFERENTIAL
POWER AMP
AMP
NFB ON
(VOLTAGE STAGE)
Q514-515
Q517
NFB OFF
RY703(2/2)
OFFSET
SET
Q707-713
SPEAKER OUT
CN704
Q111-112
L
MONO-L
OVERLOAD
R-CH
Q113-114
R
CN705
Q311-312
L
MONO-R
R-CH
OVERLOAD
Q313-314
R
CN707
Q510-511
SUB WOOFER
SPEAKER OUT
Q519-512
OVERLOAD
Q521-Q524
• Signal path
: Audio