No Picture - Sony KDL-22EX420 Service Manual

Trouble Shooting

3-4. No Picture

3-4-1. Except HFR Model
No Picture
Press HOME Key.
XMB（Menu）
displayed?
Yes
B* Board
Note: B* and G* Board
Segment Size
P-1 22
P-1 26
P-1 32
P-1 40
P-1 46
about 5V ： 22"(WXGA)Model
about 12V : ex ： 22"(WXGA)Model
Check
No
PANEL_VCC
at JL6004
on the B* Board
No
G* Board
B* Board Type G* Board Type
BAT-S G1A
BAT-S G1B
BAT-V GE2A
BAT-V GE3A
BAT-V GE3A
BL_ON：H
Check
Yes
BL_ON at JL6018
on the B* Board
BL_ON：L
Replace Harness
(Between G* Board
to B* Board)
NG
NG
Change B* Board)
Symptom
improvement
B* Board
28
KDL- 22, 26 EX420, 32,40,46 EX520
KDL- 22 EX423, 26 EX423, 32 EX420, 32, 40, 46 EX523
NG
Replace
the LVDS Harness
Symptom
improvement
Harness
(LVDS)
Symptom
improvement
Harness
（G* to B*)
G* Board
RM-GD020, CD013
RM-GD020
LCD Panel
(T-con)