LG KU580 Service Manual - Page 120
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4. TROUBLE SHOOTING 4.15.2 Step 2 C103 C102 GGSSMMPPAAMM (Bottom) Figure 4-6. Step 2 : GSM PAM Block ➁ Step 2 Check VBATI (C102, C103) in GSM PAM Block ➁ to Check if main power 3.7V No OK? source input or not Yes Proceed to the Step 3 Check Point (C618) in Power Source Block ➄ To Check Power source 3.7V OK? No Yes Check (C618 & C102, C103) in Block ➀➄ to check inner line connection From C618 to C102, C103 No Short? Yes Soldering Check Component (CN600) In Power Source Block ➄ Check The PowerSupply Change Board Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 121 - LGE Internal Use Only
- 121 -
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
4.15.2 Step 2
GSM PAM
(Bottom)
C103
C102
Figure 4-6. Step 2 : GSM PAM Block
➁
Step 2
Check VBATI
(C102, C103)
in GSM PAM Block
to Check if main power
source input or not
Check (C618 & C102, C103)
in Block
to check inner line connection
From C618 to C102, C103
Check Point
(C618)
in Power Source Block
To Check Power source
3.7V
OK?
Yes
No
Proceed to the
Step 3
3.7V OK?
No
Yes
Check The PowerSupply
Short?
No
Yes
Soldering Check Component
(CN600)
In Power Source Block
Change Board
➁
➀➄
➄
➄
GSM PAM