LG KT520 Service Manual page 124

4.15.3 Step 3
C213
DC/DC
Converter
Step 3 :WCDMA PAM Block
Step 3
Check VBAT (C213)
in WCDMA PAM Block
Check Point (C617)
in Power Source Block
To Check Power source
Check (C213 & C617)
in Block
to check inner line connection
From C213 to C617
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Only for training and service purposes
WCDMA
PAM
3.7V
OK?
See the Next Page
,
Short ?
Soldering Check Component
(CN600)
In Power Source Block
- 125 -
4. TROUBLE SHOOTING
Check point
(C617)
Check point
(CN600)
Main Board (bottom side)
- PAM Power Source
No
Yes
No
3.7V
Check the Power Supply
OK?
Yes
No
Yes
Change Board
LGE Internal Use Only