Sony XR-3750 / XR-3758 / XR-3759 / XR-7750 / XRS-888 Service Manual ▷ View online
XR-3750
– 29 –
– 30 –
6-7.
SCHEMATIC DIAGRAM – PANEL Section –
(Page 26)
– 31 –
– 32 –
• IC Block Diagrams
– MAIN Section –
– MAIN Section –
IC301
CXA2509AQ-T4
IC331
LC75373ED
+
–
–
+
–
+
–
+
–
+ –
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
21
22
23
26
27
28
29
30
31
32
33
34
37
38
39
40
24
25
PBFB1
PBRIN1
PBREF1
PBFIN1
35
36
PBGND
VCT
PBFIN2
PBREF2
PBRIN2
PBFB2
PBEQ1
PBOUT1
VCC
TAPEIN1
AUXIN1
MSLPF
LINEOUT1
NC
NC
G2FB
G1FB
MSTC
DGND
MSOUT
NC
NC
INSW
TAPESW
MSMODE
DRSW
MSSW
NC
NC
LINEOUT2
DIREF
AUXIN2
TAPEIN2
PBEQ2
PBOUT2
GND
F2
120
µ
/70
µ
X1
X1
VCT
+
F1
120
µ
/70
µ
24dB
F3
LPF
VCC
DETECT
MS ON/
OFF
FWD/RVS
TAPE EQ
TAPE/AUX
NR BIAS
24dB
MS
MODE
T2
T1
+
–
–
+
–
–
+
–
–
+
–
+
–
+
–
+
–
–
+
–
–
+
–
+
–
+
–
+
–
–
+
–
–
+
–
–
+
–
+
–
DECODER
LATCH
SHIFT
REGISTER
CONTROL
–
+
+
–
–
1
2
3 4
5
6 7 8
9 10
20
19
18
17
16
15
14
13
12
11
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
43
44
LSELO
L4
L3
L3
L2
L1
VDD
R1
R2
R3
R4
R4
RSELO
RVRIN
RCOM
RT1
RT2
RT3
RTOUT
RSIN
RS1
RS2
RS3
RSOUT
RFIN
RFOUT
RROUT
VSS
CL
DI
CE
VREF
LROUT
LFOUT
LFIN
LSOUT
LS3
LS2
LS1
LSIN
LTOUT
LT3
LT2
LT1
LCOM
LVRIN
IC351
MM1322XFBE
1
2
3
4
5
6
7
8 OUT2
VS
OUT1
GND
IN1
VCC
IN2
GND
CONTROL CIRCUIT
IC611
BA3918-V2
+
–
+
–
+
–
+
–
OVER VOLTAGE
PROTECT
REGULATOR
1
2 3 4
5
6
7
8
9
10
12
11
NC
MODE2
MODE1
STB
VDD
AMP
VCC
ANT
COM
AM
FM
GND
• Waveform
– MAIN Section –
– MAIN Section –
1
IC501
&¶
(X-IN)
3.2 Vp-p
222 ns
– 33 –
(1)
CHASSIS SECTION
SECTION 7
EXPLODED VIEWS
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference num-
ber in the exploded views are not supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of the
electrical parts list.
electrical parts list.
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
14
8
7
6
5
4
3
2
1
13
12
11
10
9
15
#3
#8
#2
#8
#2
#2
#2
#1
Front panel ass’y
#4
F781
MG-25F-136
1
3-009-294-01 PANEL, SUB
2
3-935-003-01 SPRING, TORSION
3
3-932-205-41 DOOR, CASSETTE
4
X-3370-437-4 LOCK ASSY
* 5
3-010-377-01 INSULATOR
* 6
A-3317-303-A MAIN BOARD, COMPLETE
7
3-915-923-01 SCREW, GROUND POINT
* 8
X-3373-270-1 COVER ASSY
9
1-776-207-11 CORD (WITH CONNECTOR) (POWER)
* 10
3-009-809-01 BRACKET (IC)
* 11
3-009-815-01 HEAT SINK (BUS NON)
12
3-935-014-01 CUSHION (U)
* 13
3-009-813-01 CHASSIS
14
3-012-859-01 CAP (25), RUBBER
15
3-937-650-01 PLATE (C), GROUND
F781
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A)
– 34 –
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
(2)
FRONT PANEL SECTION
101
3-009-301-01 BUTTON (BASS)
102
3-015-036-01 CUSHION (BACK PANEL)
103
3-016-924-01 BUTTON (L) (2) (+. –)
104
3-009-304-01 BUTTON (RELEASE)
105
3-932-475-01 SPRING (RELEASE)
107
X-3373-660-1 PANEL SUB ASSY
108
3-009-300-01 BUTTON (SOURCE)
109
3-016-925-01 BUTTON (L) (3)
(+
+ ). SEEK AMS. =0 –. r. OFF. SEL. MUTE)
111
3-016-927-01 BUTTON (1-3) (
6. 1. 2. 3)
112
3-016-928-11 BUTTON (4-6) (4. 5. 6)
113
3-016-930-01 BUTTON (R) (3) (BTM. LCL.
r)
* 114
3-010-282-01 PLATE (LCD), GROUND
* 115
3-009-305-01 SHEET (REFLECTOR)
* 116
3-009-302-01 PLATE (LCD), LIGHT GUIDE
* 117
3-009-303-02 HOLDER (LCD)
118
3-010-519-01 PANEL, FRONT BACK
119
3-014-602-11 SPACER (A)
LCD901 1-801-588-11 DISPLAY PANEL, LIQUID CRYSTAL
102
118
117
116
115
114
112
113
101
119
103
104
105
107
108
109
111
not supplied
(KEY board)
(KEY board)
#5
#5
LCD901
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