Sony GDM-20E03T5 Service Manual ▷ View online
– 22 –
GDM-20E03T5
D
A
M
G
DA
H
J
L
5-3. CIRCUIT BOARDS LOCATION
5-4. SCHEMATIC DIAGRAMS AND
PRINTED WIRING BOARDS
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 V or less are not indicated except for electrolytic.
• Indication of resistance, which does not have one for rating
electrical power, is as follows.
Pitch: 5 mm
Rating electrical power 1/4 W (CHIP : 1/10 W)
• All resistors are in ohms.
•
f
: nonflammable resistor.
•
F
: fusible resistor.
•
¢
: internal component.
•
p
: panel designation, and adjustment for repair.
• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
•
e
: earth-ground.
•
E
: earth-chassis.
• All voltages are in V.
• Readings are taken with a 10 M
Ω
digital multimeter.
• Readings are taken with a color-bar signal input.
• Voltage variations may be noted due to normal production
tolerances.
•
*
: Can not be measured.
• Circled numbers are waveform references.
•
s
: B + bus.
•
S
: B – bus.
• When replacing components identified by
]
, make the
necessary adjustments indicated. (See page 14)
• When replacing the part in below table, be sure to perfome the
related adjustment.
HV Regulator
Circuit Check
Circuit Check
HV Hold-Down
Circuit Check
Circuit Check
Beam Current
Protector Circuit
Check-1
Protector Circuit
Check-1
Beam Current
Protector Circuit
Check-2
Protector Circuit
Check-2
Voltage of 3rd
winding of FBT
winding of FBT
Part replaced (
]
)
G board
IC901
• Mounted G board
• Mounted G board
G board
D935
• Mounted G board
• Mounted G board
G board
IC901, D933, D934, R907, R908,
R909, R910
• Mounted G board
R909, R910
• Mounted G board
G board
R973, R974
• Mounted G board
• Mounted G board
G board
T902 (FBT)
• Mounted G board
• Mounted G board
Reference information
RESISTOR
: RN
METAL FILM
: RC
SOLID
: FPRD
NONFLAMMABLE CARBON
: FUSE
NONFLAMMABLE FUSIBLE
: RW
NONFLAMMABLE WIREWOUND
: RS
NONFLAMMABLE METAL OXIDE
: RB
NONFLAMMABLE CEMENT
COIL
: LF-8L
MICRO INDUCTOR
CAPACITOR
: TA
TANTALUM
: PS
STYROL
: PP
POLYPROPYLENE
: PT
MYLAR
: MPS
METALIZED POLYESTER
: MPP
METALIZED POLYPROPYLENE
: ALB
BIPOLAR
: ALT
HIGH TEMPERATURE
: ALR
HIGH RIPPLE
Note: The components identified by shading and mark
¡
are critical for safety. Replace only with part
number specified.
GDM-20E03T5
– 45 –
SECTION 6
EXPLODED VIEWS
REF.NO. PART NO.
DESCRIPTION
REMARK
REF.NO. PART NO.
DESCRIPTION
REMARK
• Items marked " * " are not stocked since
they are seldom required for routine
service. Some delay should be
anticipated when ordering these items.
6-1. CHASSIS
p
7-685-663-79
+–BV TAPPING SCREW (4X16)
4
7-685-647-79
+BVTP 3X10
®
7-685-646-79
+–BV TAPPING SCREW (3X8)
NOTE:
• Items with no part number and no
description are not stocked because they
are seldom required for routine service.
• The construction parts of an assembled
part are indicated with a collation number
in the remark column.
The components identified by shading
and mark are critical for safety.
Replace only with part number specified.
and mark are critical for safety.
Replace only with part number specified.
I
1
* X-4034-313-1 BEZEL ASSY
2-5
2
* 4-051-947-51 BUTTON, POWER
3
4-042-593-01 SPRING, CCMPRESSION
4
* 4-051-949-51 DOOR
5
4-392-036-01 CATCHER, PUSH
6
* 8-933-161-00 M BOARD, COMPLETE
7
4-389-025-01 SCREW (M4) (EXT TOOTH WASHER)
8
1-694-108-11 TERMINAL BOARD ASSY, I/O
9
¡
1-251-382-12 INLET, AC 3P (WITH NOISE FILTE)
10
4-052-345-01 SCREW, (3X8) (+K), TAPPING
11
4-053-310-01 SHEET, CONNECTOR
12
* 8-933-158-00 A BOARD, COMPLETE
14
* 8-933-160-00 H BOARD, COMPLETE
15
4-029-432-01 SCREW (3X12), (+) B VWHTP
16
* 4-051-566-01 HOOK (20)
17
4-365-808-01 SCREW (5), TAPPING
18
4-381-962-11 SCREW (M4X8), TAPPING, (+–) (BV)
19
* 8-933-202-00 D BLOCK ASSY (D BOARD)
20-22
20
* 8-933-127-00 DA BOARD, COMPLETE
21
* 3-701-903-11 HOLDER, PC BOARD
22
* 4-382-848-01 HOLDER, PCB
23
¡
X-4033-383-1 TRANSFORMER ASSY, FLYBACK
(NX-4200//J1D4)
24
* 3-703-141-00 HOLDER, PCB
25
4-382-854-11 SCREW (M3X10), P SW (+)
26
*
¡
8-933-159-00 G BLOCK ASSY (G BOARD)
21-25
27
* 4-051-441-71 CABINET
28
* 4-051-442-71 COVER, SCREW
29
* 4-057-692-02 LABEL, INFORMATION
10
11
1
12
14
6
7
8
9
21
22
23
24
15
25
16
26
17
27
18
28
29
20
16
19
18
18
18
18
22
21
2
3
GDM-20E03T5
– 46 –
The components identified by shading
and mark are critical for safety.
Replace only with part number specified.
and mark are critical for safety.
Replace only with part number specified.
I
REF.NO. PART NO.
DESCRIPTION
REMARK
REF.NO. PART NO.
DESCRIPTION
REMARK
66
4-046-901-01 SPRING, TENSION
67
4-050-692-01 STOPPER (A)
68
4-041-621-01 STOPPER (B)
69
* 4-041-625-01 RING, TILT SWIVEL
70
4-047-474-01 FOOT, RUBBER
71
* 4-051-443-81 COVER, BOTTOM
72
4-308-870-00 CLIP, LEAD WIRE
73
1-452-032-00 MAGNET, DISC ; 10mm
φ
74
1-452-094-00 MAGNET, ROTATABLE DISK ; 15mm
φ
75
X-4030-584-1 PERMALLOY ASSY, CORRECTION
76
* 4-057-193-01 BAND, DEGAUSE COIL
77
* 8-933-244-00 L BOARD, COMPLETE
78
* 4-046-829-01 CUSHION
6-2. PICTURE TUBE
7-685-664-79
+BVTP 4X20
¢
7-682-563-04
+–BV TAPPING SCREW (M4X12)
4
7-685-647-79
+BVTP 3X10
π
51
¡
8-736-369-94 ITC ASSY (20SH8-R3)
52~54
52
¡
8-736-389-05 PICTURE TUBE (20SH8)
53
¡
8-451-476-12 DEFLECTION YOKE (Y20SHK-M)
54
¡
8-453-003-41 NECK ASSY (NA3012-M4)
55
4-040-897-01 SPACER, DY
56
¡
1-416-140-11 COIL, LANDING CORRECTION
57
¡
1-416-139-11 COIL, DEMAGNETIC
58
¡
1-416-159-11 COIL, LANDING CORRECTION
59
* 4-047-316-01 SPRING, TENSION
60
4-381-962-11 SCREW (M4X8), TAPPING, (+–) (BV)
61
* 8-933-162-00 J BOARD, COMPLETE
62
* 4-394-972-21 CAP, POWER
63
* 4-051-945-11 BOTTOM ATTACHMENT (L)
64
* 4-051-944-11 BOTTOM ATTACHMENT (R)
65
* X-4034-295-1 STAND ASSY
66~71
60
70
51
61
52
62
72
53
63
73
54
64
75
55
65
56
66
57
67
68
69
71
74
58
76
77
76
56
59
78
78
GDM-20E03T5
– 47 –
101
102
103
104
105
106
107
105
109
6-3. PACKING MATERIALS
The components identified by shading
and mark are critical for safety.
Replace only with part number specified.
and mark are critical for safety.
Replace only with part number specified.
I
REF.NO. PART NO.
DESCRIPTION
REMARK
REF.NO. PART NO.
DESCRIPTION
REMARK
101
* 3-859-337-11 MANUAL, INSTRUCTION
102
* 4-051-452-01 CUSHION (UPPER) (ASSY)
103
* 4-058-008-01 INDIVIDUAL CARTON
104
* 4-041-927-31 BAG, POLY ETHYLENE
105
* 4-396-077-01 JOINT
106
* 4-051-453-01 CUSHION (LOWER) (ASSY)
107
* 4-051-450-01 TRAY
109
¡
1-765-717-11 CORD SET, POWER 10A/250V
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