LG L705ix Service Manual page 77

4. TROUBLE SHOOTING
Chec k 1SEG_LOCK
TP5 Signal exist?
Chec k TSIF_CLK
TP6 Signal exist?
Check C 601.C602 so ld erin g
Check U 601 sold erin g
Chan ge th e Main board
LGE Internal Use Only
Run 1 -SEG
Chec k TP1
Level 2.8V?
YES
Chec k TP2
Level 1.5V?
YES
Chec k TP3
Level 1.2V?
YES
TP4 Level 2.8V?
YES
Chec k TSIF_EN
YES
YES
conditi on
YES
conditi on
YES
- 78 -
NO
Chec k the U600
NO
Chec k the U602
NO
Chec k the U603
NO
Chec k R600 soldering
NO
Chec k R603 soldering
NO
Chec k R605 soldering
NO
Re-solder C601, C602
NO
Re-solder or Replace U601
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