LG GD580 Service Manual page 125

4. Trouble Shooting
4.14.3 Step 3
TP3
TP5
Step 3 :WCDMA PAM Block
Step 3
Check VBAT (TP3)
in WCDMA PAM Block
Check Point (TP1)
in Power Source Block
To Check Power source
Check (TP1 & TP3)
in Block
to check inner line connection
From TP3 to TP1
LGE Internal Use Only
See the Next Page
,
Soldering Check Component
In Power Source Block
Main Board (bottom side)
- Power Source Block
No
3.7V
OK?
Yes
No
3.7V
OK?
Yes
No
Short ?
Yes
(CN300)
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TP1
TP2
Check the Power Supply
Change Board
Only for training and service purposes