Step 3 - LG U8120 Service Manual

4. TROUBLE SHOOTING

4.16.3 Step 3

Step 3
Check VBATI (R1326)
in GSM PAM Block 2
to Check if main power
source input or not
Check L1300 to
check if power
source input or not
Check L1300 & R1326
inner Line connection
Check (L1300 & R2215)
in Block 2, 5 to check
inner line connection
From L1300 to R2215
GSM PAM
Figure 4-6. GSM PAM Block 2 2
Yes
3.7V OK ?
No
No
3.7V OK ?
Yes
No
Short?
Yes
Change L1300
- 132 -
VBATI
(R1326)
L1300
See The Step 4
Short?
Yes
Check Soldering
(R2215 & R2216)
In Power Source Block
Change the Board
Change the Board
No