Sony XM-752EQX Service Manual ▷ View online
– 6 –
1
BTP 3x5
2
BTP 3x4
3
BTP 3x4
4
bottom plate
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. BOTTOM PLATE
2-2. PANEL (A)
1
BTP 3x8
2
BTP 3x8
3
panel (A)
– 7 –
1
BTP 3x12
2
BTP 3x12
4
BVTP 3x12
5
screw (3x8) (CZN-N)
3
fuse
(30A)
6
AMP board
2-3. PANEL (B)
2-4. AMP BOARD
2
BTP 3x8
1
BTP 3x8
3
panel (B)
– 8 –
1
claw
2
claw
3
CNP804
4
CNP803
5
CNJ805
6
CNJ802
7
control panel block
2-5. CONTROL PANEL BLOCK
3-1. BLOCK DIAGRAM
– 9 –
– 10 –
XM-752EQX
SECTION 3
DIAGRAMS
CNJ801
OUTPUT
(THROUGH)
L
(MONO)
INPUT
L
(MONO)
+
+
CNJ801
+
+
CN803
L
CN801
+B
REM
LINE AMP
IC101
R-CH
R-CH
FILTER
IC103 (2/2)
1
2
FILTER
IC103 (1/2)
7
6
VR101-1
LPF
OFF
HPF
S101
FILTER
EQ AMP
VR101
FILTER
S102
DIRECT
BUFFER
IC111
LINE
SWITCH
Q112
7
5
LINE
CONTROL
B– (AMP)
B+(AMP)
Q813, 814
POWER
ON/OFF
Q901
B+
SWITCH
Q902 , 903
LED
DRIVE
SWITCH
Q807
F901
3
16
1
10
9
ON/OFF
CONTROL
OSC
12
DC-DC CONVERTER
CONTROL
IC901
TH802
TH801
PROTECT
LATCH
Q809, 812
ON/OFF
DRIVE
ON/OFF
DRIVE
Q905, 907
+6V
REG
Q904
Q906, 908
(CURRENT CHECK)
PROTECT
CHECH
Q808, 811
(CURRENT CHECK)
T901
DC-DC CONVERTER
TRANSFORMER
D912
+6V
+15V
REG
Q911, 913
–15V
REG
Q912, 914
B+ (AMP)
+15V
–15V
B– (AMP)
B+ (PRE)
B– (PRE)
D901
D902
D902
D903
D904
D904
DRIVER
Q101 – 106
POWER
AMP
Q107 – 110
OVER LOAD
DET
Q111
VOLTAGE
CHECK
Q815-817
SIGNAL METER AMP
IC801
7
5
1
12 – 15
16 – 21
LED
DRIVE
Q801 – 804
LD801 – 824
LED
CONTROL
IC802
L
R
MONO
L+R
CN802
R-CH
VR107
LEVEL
–1
–3
OUTPUT
(THROUGH)
R
INPUT
R
–2
–4
HIGH
LEVEL
INPUT
INPUT
VCC
LEVEL
METER
POWER/PROTECTOR
THERMAL
Signal path
: AUDIO
: AUDIO
+
–
6
7
5
+
–
2
1
3
EQ
IC102
VR101-2
+
–
6
7
5
IC106-109
VR102 50Hz
VR103 200Hz
VR104 800Hz
VR105 3.2kHz
VR106 12.8kHz
EQUALIZER
EQ BUFFER
IC105
OFF
ON
DC DET
IC901
4
2
3
1
B+
AC1 IN
D4–D1
O6–O1
Q810
B+
LD827
LED
DRIVE
SWITCH
Q806
OFFSET
B+
LD826
LED
DRIVE
SWITCH
Q806
OVER
CURRENT
B+
LD825
B+
D801
R
SPEAKER OUT
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