Diagrams; Block Diagram - Sony xm-752eqx Service Manual

SECTION 3

DIAGRAMS

3-1. BLOCK DIAGRAM

CNJ801
OUTPUT –1
(THROUGH)
L
(MONO)
LINE AMP
IC101
–3
INPUT
+ –
2
–
L 6
7 3 +
(MONO) +
+
5
EQ
IC102
CN803
L
HIGH
LEVEL
INPUT
R
CNJ801
–2
OUTPUT
(THROUGH)
R
–4
+
INPUT
R-CH
R
+
R-CH
Q902 , 903
CN801
F901
B+
+B
SWITCH
Q901
POWER
REM
ON/OFF
Q806 Q806
LED LED
DRIVE DRIVE
SWITCH SWITCH
B+
LD825
OVER
CURRENT
POWER/PROTECTOR
– 9 –
FILTER FILTER
IC103 (1/2) IC103 (2/2)
VR101-1 VR101-2
1 2 1 6 7
VR101
FILTER EQ BUFFER
LPF
OFF
5
HPF
VR102 50Hz
6
S101
VR103 200Hz
FILTER
EQ AMP VR104 800Hz
IC106-109
VR105 3.2kHz
VR106 12.8kHz
EQUALIZER
DC DET
IC901
2 4
B+ 1 3
Q809, 812
PROTECT
LATCH
(CURRENT CHECK)
Q808, 811
PROTECT
CHECH
(CURRENT CHECK)
D801
Q810
DC-DC CONVERTER
CONTROL
IC901
16 1 10 9
Q807
LED
ON/OFF
DRIVE 3 OSC
CONTROL
SWITCH
B+ B+
LD826 LD827
OFFSET THERMAL
IC105
+
7
LINE
– BUFFER
SWITCH
IC111
Q112
OFF
S102
5 7
DIRECT
ON
VR107
LEVEL
Q813, 814
LINE
CONTROL
B– (AMP) B+(AMP)
T901
Q905, 907 Q904
DC-DC CONVERTER
D912
TRANSFORMER
ON/OFF +6V
DRIVE REG
Q906, 908
ON/OFF
DRIVE
D903
D904
VCC 12
B+
D901
D902
LD801 – 824
Q801 – 804
LEVEL
LED
METER
DRIVE
LED
SIGNAL METER AMP
CONTROL
12 – 15 16 – 21
IC801
IC802
D4–D1 O6–O1
5 7 1
AC1 IN
Q101 – 106 Q107 – 110 CN802
POWER
DRIVER
AMP
Q111 Q815-817
OVER LOAD VOLTAGE
DET CHECK
R-CH
R
+6V
B+ (AMP)
Q911, 913
+15V
+15V
REG
Q912, 914
–15V
–15V
REG
B– (AMP)
B+ (PRE)
Signal path
: AUDIO
B– (PRE)
– 10 –
XM-752EQX
SPEAKER OUT
L
L+R MONO