Keypad Back Light Trouble - LG KC560 Service Manual

5.9 Keypad back light trouble

Check Points
-Signal path is connected well
MLED
LD505
LD507
START
Check All of LEDs solder
Check TP1,TP2
is 0 V?
Yes
Check TP3 is
2.62V?
Yes
CN302 / CN303 is
correct ?
Replace KEY FPCB
/ SLIDE PCB
Assemble
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Only for training and service purposes
TP2
TP1
MULTIK EY_BL 1
MULTIK EY_BL 2
VA514
VA515
No Check
No
Check
No
Replace conn.
(CN302 / 303)
VB AT
LD100
LEWWS44- E
LEWWS44- E LD101
U501 of
SLIDE PCB
U201 of main
PCB
TP1
- 75 -
5. TROUBLE SHOOTING
TP3
R103
NUMK EY_B L
10
R105
10
TP3
TP2
LGE Internal Use Only