Trouble Shooting; Power Supply Failure - LG -200 Service Manual

3. TROUBLE SHOOTING

3-1. Power Supply Failure

a) Failure:
- Problem with turning on Mobile phone.
➜ Solution:
1. Test the set's current by using battery
simulator; observe the value of current
used.
2. Case1:
If the current is higher 300mA, please
C333
check C333. Or replace C333 if its
resistance between 2Ω and 150Ω.
3. Case 2:
- In case the current is between 35 and
45mA, the cause could be FLASH
ROM (U12) defect. Please reinstall
software.
- If the software can't be reinstalled,
please replace U12.
b) Failure:
- Problem with charging the battery
U12
- Charge connector damage
➜ Solution:
- J5 may be broken, replace the connector,
J5.
- Control the temperature and air flow
carefully.
- J5 may be a cold soldering. Please re-
solder again.
J5
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3. TROUBLE SHOOTING