LG -600 Series Repair Manual page 88

Appendix.
LCD Flow Chart & Solution
16-A) Check Placement of U305
16-B) Check U305 Pin 3 Using Osciolloscope
Yes
16-C) Check U305 Pin 5 Using Osciolloscope
Yes
Goto Block 17!
GSM Handsets Lab.
>
Pin 3 3V ?
>
Pin 3 3V ?
No
No
88
Check LCD_EN
Line Path
16-B) Test!!
Yes
Replace
U500
Check Soldering
U305
16-C) Test!!
Yes
Replace
U305