Troubleshooting; Power Problem; Standby Led Blinking - Sony KDL-22EX420 Service Manual

3-1. Power Problem

No Power
SW OFF
Check
*Power Saving Switch
SW ON
Check STBY 3.3V
NG
at 10 pin of CN6001
on the B* Board
OK
B* Board
*Power Saving Switch：Only for BAT-L model
(2b-1,2b-2,3a-1)

TROUBLESHOOTING

Turn on the Switch
Replace the Harness
NG
Between G* Board and
B* Board
Symptom
improvement
Harness
Note: B* and G* Board
Segment
P-1
SECTION 3
KDL- 22 EX423, 26 EX423, 32 EX420, 32, 40, 46 EX523

3-2. Standby LED Blinking

3-2-1. 2-times blinking (Main Power Error)
2-times blinking
Check REG12V at
pins 2/3 of CN6001 on
the B* Board
12V OK
G* Board
B* Board
Size B* Board Type G* Board Type
22 BAT-S
26 BAT-S
32 BAT-V
40 BAT-V
46 BAT-V
19
KDL- 22, 26 EX420, 32,40,46 EX520
Replace the Harness
NO 12V
Between G* Board and
B* Board
Symptom
improvement
Harness
G1A
G1B
GE2A
GE3A
GE3A
RM-GD020, CD013
RM-GD020
NG
G* Board