LG KT520 Service Manual page 123

4. TROUBLE SHOOTING
4.15.2 Step 2
C103
C104
Step 2
Check VBATI (C103, C104)
in GSM PAM Block
to Check if main power
source input or not
Check Point (C617)
in Power Source Block
To Check Power source
Check (C617 & C103, C104)
in Block
to check inner line connection
From C617 to C103, C104
LGE Internal Use Only
(Bottom)
Figure 4-6. Step 2 : GSM PAM Block
No
3.7V
OK?
Yes
Proceed to the Step 3
3.7V OK?
Yes
Short?
Yes
Soldering Check Component
(CN600)
In Power Source Block
- 124 -
GSM PAM
No
Check the Power Supply
No
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