Sony XM-S400D Service Manual page 7

4-1. BLOCK DIAGRAM
CN101
SIGNAL
INPUT
5
FL+
DIFFERENTIAL
6
IC101 (1/2)
FL–
7
FR+
R-CH
8
FR–
1
RL+
DIFFERENTIAL
2
IC101 (2/2)
RL–
3
RR+
R-CH
4
RR–
D101
AUDIO DETECT
Q101
SYSTEM CONTROLLER
IC508
SP_IN 4
INTP3 13
AMP_SDA 12
AMP_SCL 11
AMP_FAULT 10
Q526
AMP_MUTE 9
AMP_STBY 8
REM_IN 3
TEMP_AMP 21 TH501
TEMP 20 TH502
TEMP_POW2 19 TH503
DCDC_ON 23
D514
LED DRIVE
LED_ON 7
POWER
Q525
PROTECT
BU_IN 2
XM-S400D
SECTION 4
DIAGRAMS
BUFFER
AMP
IC104 (1/2)
BUFFER S101-1
AMP
IC104 (2/2)
INPUT
SELECT
2CH
4CH
MUTING MUTING
Q103 Q104
MUTING CONTROL
Q102
+3.3V
+18V
RECT
ANALOG_+18V REGULATOR
D516 – 519
IC507
CENTER VOLTAGE
TO
GENERATOR
AUDIO CIRCUIT
IC103
VCC
S103-1
FRONT
HPF
ON POWER AMP
HIGH-PASS
IC301
FILTER
OFF
IC107 (1/2)
OUT2_P
15 IN2_P
OUT2_M
LOW-PASS
FILTER
IC107 (2/2)
OUT1_P
13 IN1_P
OUT1_M
S102-1
REAR
LPF
ON
63 64 1 2 4
OFF
T502
DC/DC
CONVERTER
TRANSFORMER
SWITCHING BUFFER
DRIVER Q507
Q509, 513
DC/DC
CONVERTER
IC503
SWITCHING
DRIVER BUFFER
Q510, 514
Q508
D504
BACK UP BATTERY
VOLTAGE DETECT CHECK
Q501, 503 Q502
7 7
CN501
6
44 FL+
8
45 FL–
5
FR+
R-CH
7
FR–
2
47 RL+
4
48 RL–
1
RR+
R-CH
2
RR–
9
REMOTE DETECT
AMP_REM
Q504
+3.3V 15
REGULATOR VCC
IC502
B+ SWITCH
Q527, 528
D505
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: AUDIO
XM-S400D