LG KP500 Service Manual page 85

5. Trouble shooting
Check All of LEDs solder
Replace KEY FPCB
LGE Internal Use Only
START
Check TP500 is
2.62V?
Yes
20pin connector
(Main CN501, KEY
FPCBCN101) is
good?
Yes
Assemble
No Check Q300 of main
board
No
Replace 20pin
conn.
(CN501, CN101)
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TP1
Only for training and service purposes