Sony XR-4890 Service Manual ▷ View online
– 31 –
SECTION 7
EXPLODED VIEWS
(1) CHASSIS SECTION
NOTE:
• -XX, -X mean standardized parts, so they may have
some difference from the original one.
• Items marked “*” are not stocked since they are
seldom required for routine service. Some delay
should be anticipated when ordering these items.
should be anticipated when ordering these items.
• Color Indication of Appearance Parts Example:
KNOB, BALANCE (WHITE) . . . . (RED)
Â
Â
Parts color Cabinets color
• The mechanical parts with no reference number in
the exploded views are not supplied.
• Hardware (# mark) list and accessories and pack-
ing materials are given in the last of this parts list.
The components identified by
mark
mark
! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
Replace only with part number
specified.
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
* 10
3-018-390-01 BRACKET (IC)
* 11
3-031-026-11 HEAT SINK
12
3-935-014-01 CUSHION (U)
* 13
3-009-813-41 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)
1
3-030-828-01 PANEL, SUB
2
3-935-003-01 SPRING, TORSION
3
3-027-437-41 DOOR, CASSETTE
4
X-3370-437-1 LOCK ASSY
* 5
3-033-846-01 INSULATED PLATE
* 6
A-3317-391-A MAIN BOARD, COMPLETE
7
3-915-923-01 SCREW, GROUND POINT
* 8
X-3373-270-1 COVER ASSY
9
1-776-527-81 CORD (WITH CONNECTOR)(ISO)(POWER)
14
8
7
6
5
4
3
2
1
13
12
11
10
9
15
#3
#2
#2
#2
#2
#2
#2
#1
Front panel ass’y
#4
F781
MG-25F-136
– 32 –
(2) FRONT PANEL SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
* 61
3-030-839-01 SHEET (REFLECTOR)
* 62
3-030-824-01 PLATE, LIGHT GUIDE
63
1-694-508-11 CONDUCTIVE BOARD, CONNECTION
* 64
3-030-825-01 HOLDER (LCD)
65
3-030-827-01 PANEL, FRONT BACK
66
X-3377-055-1 FRONT PANEL ASSY
* 67
3-030-840-01 PLATE (B), GROUND
LCD901 1-803-497-11 DISPLAY PANEL, LIQUID CRYSTAL
51
3-030-838-01 BUTTON (RELEASE)
52
3-030-832-01 LEVER (S/A)
53
3-932-475-01 SPRING (RELEASE)
54
3-030-834-01 BUTTON (M/S)
55
3-030-835-01 BUTTON (1-6)
56
3-031-027-11 BUTTON (P/P/A)
57
3-030-831-01 BUTTON (SOURCE)
58
3-030-830-01 KNOB (VOL)
60
3-030-837-01 BUTTON (D-BASS)
57
58
60
65
54
66
53
51
52
56
#5
#5
#5
C
B
C
B
A
A
67
55
not supplied
(KEY board)
(KEY board)
64
62
61
67
63
LCD901
– 33 –
(3) MECHANISM DECK SECTION (MG-25F-136)
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
161
3-933-346-01 CATCHER
162
3-933-344-01 GUIDE (C)
163
3-014-798-01 SCREW (HEAD), SPECIAL
164
3-364-151-01 WASHER
165
A-3301-267-A CHASSIS ASSY (G)
166
3-017-302-01 BELT (25)
167
3-936-853-01 FLYWHEEL (F)
168
3-701-437-21 WASHER
HP901
1-500-157-21 HEAD, MAGNETIC (PLAYBACK)
M901
A-3291-665-A MOTOR ASSY, MAIN (CAPSTAN/REEL)
151
A-3291-667-A CLUTCH (FR) ASSY
152
3-019-130-01 LEVER (LDG-A)
153
3-019-131-01 LEVER (LDG-B)
154
3-020-539-01 SPRING (LD-1), TENSION
155
3-020-540-01 SPRING (LD-2), TENSION
156
3-020-542-01 GEAR (LOADING FT)
157
3-341-753-11 WASHER, POLYETHYLENE
158
3-020-533-01 HOUSING
159
3-020-532-01 ARM (SUCTION)
160
3-020-534-01 HANGER
160
161
162
164
165
166
167
151
168
168
159
158
155
156
157
154
153
152
163
HP901
M901
#7
#6
A
A
– 34 –
SECTION 8
ELECTRICAL PARTS LIST
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
KEY
• SEMICONDUCTORS
In each case, u: µ , for example:
uA...: µ A..., uPA...: µ PA..., uPB...: µ PB...,
uPC...: µ PC..., uPD...: µ PD...
uA...: µ A..., uPA...: µ PA..., uPB...: µ PB...,
uPC...: µ PC..., uPD...: µ PD...
• CAPACITORS
uF : µ F
• COILS
uH : µ H
• Abbreviation
• Due to standardization, replacements in the parts list
may be different from the parts specified in the
diagrams or the components used on the set.
diagrams or the components used on the set.
• -XX, -X mean standardized parts, so they may have
some difference from the original one.
• Items marked “*” are not stocked since they are
seldom required for routine service. Some delay
should be anticipated when ordering these items.
should be anticipated when ordering these items.
• RESISTORS
All resistors are in ohms
METAL: Metal-film resistor
METAL OXIDE: Metal Oxide-film resistor
F : nonflammable
METAL: Metal-film resistor
METAL OXIDE: Metal Oxide-film resistor
F : nonflammable
Note:
When indicating parts by reference
number, please include the board
name.
number, please include the board
name.
The components identified by
mark
mark
! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
Replace only with part number
specified.
KEY BOARD, COMPLETE
*******************
*******************
1-694-508-11 CONDUCTIVE BOARD, CONNECTION
*
3-030-824-01 PLATE, LIGHT GUIDE
*
3-030-825-01 HOLDER (LCD)
*
3-030-839-01 SHEET (REFLECTOR)
*
3-030-840-01 PLATE (B), GROUND
< CAPACITOR >
C952
1-163-033-00 CERAMIC CHIP
0.022uF
50V
C953
1-163-251-11 CERAMIC CHIP
100PF
5%
50V
C954
1-165-319-11 CERAMIC CHIP
0.1uF
50V
C955
1-165-319-11 CERAMIC CHIP
0.1uF
50V
C956
1-164-222-11 CERAMIC CHIP
0.22uF
25V
< CONNECTOR >
CNP901 1-785-775-11 PIN, CONNECTOR 15P
< DIODE >
D902
8-719-105-99 DIODE RD6.2M-B1
D903
8-719-105-99 DIODE RD6.2M-B1
D904
8-719-105-99 DIODE RD6.2M-B1
D951
8-719-976-99 DIODE DTZ5.1B
< IC >
IC901
8-759-366-34 IC LC75824E
< LIQUID CRYSTAL DISPLAY >
LCD901 1-803-497-11 DISPLAY PANEL, LIQUID CRYSTAL
< SWITCH >
LSW901 1-771-610-11 SWITCH, TACTILE (WITH LED)(OFF)
LSW902 1-762-620-21 SWITCH, KEY BOARD (WITH LED)(SOURCE)
LSW903 1-762-620-21 SWITCH, KEY BOARD (WITH LED)(MODE *)
LSW905 1-762-620-21 SWITCH, KEY BOARD (WITH LED)(SOUND)
LSW906 1-771-610-11 SWITCH, KEY BOARD (WITH LED)(SHIFT)
LSW902 1-762-620-21 SWITCH, KEY BOARD (WITH LED)(SOURCE)
LSW903 1-762-620-21 SWITCH, KEY BOARD (WITH LED)(MODE *)
LSW905 1-762-620-21 SWITCH, KEY BOARD (WITH LED)(SOUND)
LSW906 1-771-610-11 SWITCH, KEY BOARD (WITH LED)(SHIFT)
LSW921 1-762-620-21 SWITCH, KEY BOARD (WITH LED)(EJECT 6)
LSW922 1-762-620-21 SWITCH, KEY BOARD (WITH LED)
LSW922 1-762-620-21 SWITCH, KEY BOARD (WITH LED)
(PRESET/DISC -)
LSW923 1-762-620-21 SWITCH, KEY BOARD (WITH LED)
(PRESET/DISC +)
LSW927 1-762-620-21 SWITCH, KEY BOARD (WITH LED)(DSPL)
LSW928 1-771-610-11 SWITCH, TACTILE (WITH LED)(6)
LSW928 1-771-610-11 SWITCH, TACTILE (WITH LED)(6)
LSW929 1-771-610-11 SWITCH, TACTILE (WITH LED)(5/ENTER)
LSW930 1-771-610-11 SWITCH, TACTILE (WITH LED)(4/n)
LSW931 1-771-610-11 SWITCH, TACTILE (WITH LED)(3/PLAY MODE)
LSW930 1-771-610-11 SWITCH, TACTILE (WITH LED)(4/n)
LSW931 1-771-610-11 SWITCH, TACTILE (WITH LED)(3/PLAY MODE)
LSW932 1-771-610-11 SWITCH, TACTILE (WITH LED)(2/SET UP)
LSW933 1-771-610-11 SWITCH, TACTILE (WITH LED)(1/N)
LSW933 1-771-610-11 SWITCH, TACTILE (WITH LED)(1/N)
< PILOT LAMP >
PL901
1-517-633-21 LAMP, PILOT
PL902
1-517-633-21 LAMP, PILOT
< TRANSISTOR >
Q941
8-729-106-60 TRANSISTOR 2SB1115A
Q942
8-729-900-53 TRANSISTOR DTC114EK
Q943
8-729-106-60 TRANSISTOR 2SB1115A
Q944
8-729-900-53 TRANSISTOR DTC114EK
Q945
8-729-900-53 TRANSISTOR DTC114EK
< RESISTOR >
R901
1-216-647-11 METAL CHIP
680
0.5%
1/10W
R902
1-216-647-11 METAL CHIP
680
0.5%
1/10W
R903
1-216-647-11 METAL CHIP
680
0.5%
1/10W
R904
1-216-651-11 METAL CHIP
1K
0.5%
1/10W
R905
1-216-655-11 METAL CHIP
1.5K
0.5%
1/10W
R906
1-216-655-11 METAL CHIP
1.5K
0.5%
1/10W
R907
1-216-659-11 METAL CHIP
2.2K
0.5%
1/10W
R916
1-216-037-00 METAL CHIP
330
5%
1/10W
R917
1-216-033-00 METAL CHIP
220
5%
1/10W
R921
1-216-647-11 METAL CHIP
680
0.5%
1/10W
R922
1-216-647-11 METAL CHIP
680
0.5%
1/10W
R923
1-216-647-11 METAL CHIP
680
0.5%
1/10W
R924
1-216-651-11 METAL CHIP
1K
0.5%
1/10W
R925
1-216-655-11 METAL CHIP
1.5K
0.5%
1/10W
R926
1-216-655-11 METAL CHIP
1.5K
0.5%
1/10W
R927
1-216-659-11 METAL CHIP
2.2K
0.5%
1/10W
R928
1-216-663-11 METAL CHIP
3.3K
0.5%
1/10W
R929
1-216-667-11 METAL CHIP
4.7K
0.5%
1/10W
R930
1-216-671-11 METAL CHIP
6.8K
0.5%
1/10W
R931
1-208-806-11 RES,CHIP
10K
2%
1/10W
R932
1-208-810-11 RES,CHIP
15K
2%
1/10W
R941
1-216-073-00 METAL CHIP
10K
5%
1/10W
R942
1-216-065-00 RES,CHIP
4.7K
5%
1/10W
R943
1-216-073-00 METAL CHIP
10K
5%
1/10W
R944
1-216-065-91 RES,CHIP
4.7K
5%
1/10W
R951
1-216-041-00 METAL CHIP
470
5%
1/10W
R953
1-216-121-00 RES,CHIP
1M
5%
1/10W
R954
1-216-049-11 RES,CHIP
1K
5%
1/10W
R955
1-216-049-11 RES,CHIP
1K
5%
1/10W
R956
1-216-049-11 RES,CHIP
1K
5%
1/10W
R957
1-216-109-00 METAL CHIP
330K
5%
1/10W
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