DOWNLOAD Sony KV-XG29N90 Service Manual ↓ Size: 2.74 MB | Pages: 53 in PDF or view online for FREE

Model
KV-XG29N90
Pages
53
Size
2.74 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-xg29n90.pdf
Date

Sony KV-XG29N90 Service Manual ▷ View online

– 7 –
KV-XG29N90
RM-915
6.
SELF-DIAGNOSTIC CIRCUIT
[+B overcurrent ªOCPº]
Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to ON
and the voltage to pin 18 of IC301 should go down when V.SYNC is more than seven
verticals in a period, the unit will automatically turn off.
[Vertical deflection stopped]
Occurs when an absence of the vertical deflection pulse is detected by Q509 and IC001
shut down the power supply.
[Vertical deflection overcurrent]
Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be
shut down when detect this by IC001.
[White balance failure]
If the RGB levels* do not balance or become low level within 5 seconds, this error will be
detected by IC301. TV will stay on, but there will be no picture.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)
IC301
Y/CHROMA JUNGLE
FROM
CRT
FROM
[+B] Q604 C6
[V] Q509/507
IC001
SYSTEM
IC003
MEMORY
B-DAT
IO-SDAT
IK-IN
MP/
PROTECT
IO-8DAT
O-LED
SDA
5
45
21
18
51
46
35
 19 
KV
-XG29N90
RM-915
2-4. SERVICE POSITION
(Note: Remove F Bracket first.)
SECTION 2
DISASSEMBLY
2-3. CHASSIS ASSY REMOVAL
2-2. SPEAKER REMOVAL
2-1. REAR COVER REMOVAL
2 Eight screws
     (+BVTP 4 
× 16)
3 Three screws
     (+BVTP 4 
× 16)
1 Rear cover
1 Eight screws
  (+BVTP 4 
× 16)
3 Four screws
  (+BVTP 3 
× 16)
2 Bracket, speaker
1 Chassis assy
 20 
KV
-XG29N90
RM-915
2-7. TERMINAL BRACKET REMOVAL
2-5-2. REPLACEMENT OF LIGHT GUIDE
2-5. REPLACEMENT OF PARTS
For replacement of the Control Button and Light Guide, unscrew them, exchange
with the new parts, and fix them with screws (+BVTP) respectively.
2-5-1. REPLACEMENT OF CONTROL BUTTON
2-6. D3 BOARD REMOVAL
Control button
Two screws
(+BVTP 3 
× 12)
One screw
(+BVTP 3 
× 12)
1 Three connectors
2 One claw
3 D3 board
3 Two claws
4 Terminal bracket
1 Two screws
     (+ BVTP 3 
× 12)
2 One screw
     (+ BVTP 4 
× 16)
 21 
KV
-XG29N90
RM-915
2-9. A AND B6 BOARDS REMOVAL
2-8. H2 BOARD REMOVAL
3 Two connectors
4 One screw (+BVTAP 3 
× 12)
1 Two connectors
4 Four claws
5 H2 Board
2 Two connectors
4 B6 Board  
5 A Board
1 Two screws
     (+BVTAP 3 
× 12)
2 Two screws
     (+BVTAP 3 
× 12)
2-10 PICTURE TUBE  REMOVAL
Note: The picture tube for New Zealand model is upside down,
and the position for anode cap and tension spring are changed
accordingly.
! Four DGC clips
!ª Degaussing coil
0 Four claws
1 Four screws 
(+BVTP 3 
× 16)
2 Speaker Bracket
assy (L)
5 Speaker Bracket
assy (R)
!¢ Two screws
(Tapping)
6 Chassis assy
9 Deflection
yoke
8 Neck assy
7 C6 board
5 Anode cap
! Picture tube
Cushion
!¢ Two screws
(Tapping)
!£ Tension
spring
3 Eight screws 
(+BVTP 4 
× 16)
4 Eight screws 
(+BVTP 4 
× 16)
6 Four screws 
(+BVTP 3 
× 16)
DGC holder
DGC holder
Cushion (50 
× 550) 
DGC
Cushion (50 
× 550) 
DGC
Page of 53
Display

Click on the first or last page to see other KV-XG29N90 service manuals if exist.