Sony XM-752EQX Service Manual ▷ View online
– 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
– 11 –
– 12 –
XM-752EQX
3-2. PRINTED WIRING BOARD — AMP SECTION —
Note:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
Ref. No.
Location
D101
C-2
D102
D-3
D201
C-4
D202
D-5
D801
E-9
D802
F-9
D803
F-2
D806
E-1
D901
C-9
D902
D-9
D903
A-8
D904
A-9
D905
C-8
D906
D-8
D907
A-6
D908
A-6
D909
D-5
D910
G-9
D911
G-9
D912
D-9
IC101
H-3
IC801
D-3
IC901
F-9
IC902
G-8
Q101
D-2
Q102
C-2
Q103
C-2
Q104
C-3
Q105
A-3
Q106
A-2
Q107
B-1
Q108
B-1
Q109
A-3
Q110
A-2
Q111
A-2
Q112
D-2
Q201
C-4
Q202
C-4
Q203
C-4
Q204
C-4
Q205
A-5
Q206
A-5
Q207
A-4
Q208
A-4
Q209
A-6
Q210
A-4
Q211
A-5
Q212
D-4
Q808
E-9
Q809
E-9
Q810
E-8
Q811
D-9
Q812
E-8
Q813
F-1
Q814
E-2
Q815
H-4
Q816
G-4
Q817
H-4
Q901
I-9
Q902
F-10
Q903
G-9
Q904
E-5
Q905
C-9
Q906
C-10
Q907
A-9
Q908
A-10
Q911
A-6
Q912
A-6
• Semiconductor
Location
(Page 19)
(Page 16)
(Page 21)
(Page 17)
XM-752EQX
– 13 –
– 14 –
3-3. SCHEMATIC DIAGRAM — AMP SECTION — • Refer to page 23 for IC Block Diagrams.
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
2
: nonflammable resistor.
•
U
: B+ Line.
•
V
: B– Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REMOTE terminals.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: AUDIO
(Page 20)
(Page 22)
(Page 15)
(Page 16)
(Page 17)
(Page 18)
(Page 16)
(Page 16)
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