LG KU580 Service Manual - Page 119
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4. TROUBLE SHOOTING 4.15.1 Step 1 Check point (C618) C103 C102 C117 Figure 4-4. Step 1 : VBAT Block ➀ Check point (CN600) Figure 4-5. Power Source Block ➄ Step 1 3.7V No Check Point (C618) in OK? Power Source Block ➄ Yes To Check Power source to Check if main power source Proceed to the Step 2 input or not Check Point (CN600) in Power Source Block ➄ To Check Power source Check (C618 & CN600) in Block ➀ ➄ to check inner line connection From C618 to D601 3.7V No OK? Yes No Short? Yes Soldering Check Component (CN600) In Power Source Block ➄ Check The PowerSupply Change Board LGE Internal Use Only - 120 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 120 -
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
4.15.1 Step 1
Figure 4-4. Step 1 : VBAT Block
➀
Figure 4-5. Power Source Block
➄
Check point
(C618)
Check point
(CN600)
C103
C102
C117
3.7V
OK?
Step 1
Check Point (C618) in
Power Source Block
To Check Power
source to Check if
main power source
input or not
Yes
No
Proceed to the
Step 2
3.7V
OK?
No
Yes
Check The PowerSupply
Short?
No
Yes
Soldering Check Component
(CN600)
In Power Source Block
Check Point
(CN600)
in Power Source Block
To Check Power source
Change Board
Check (C618 & CN600)
in Block
to check inner line
connection
From C618 to D601
➄
➄
➀➄
➄