Trouble Shooting; Trouble Shooting Test Setup; Power On Trouble - LG KE820 Service Manual

5. Trouble shooting

5. Trouble shooting

5.1 Trouble shooting test setup

Power on all of test equipment
- Connect PIF-UNION JIG or dummy battery to the DUT for power up.
- Connect mobile switch cable between Communication test set and DUT when you need to make a
phone call.
- Follow trouble shooting procedure

5.2 Power on Trouble

Check Points
-Battery Voltage( Need to over 3.35V)
-Power-On Key detection (PWRON signal)
-Outputs of LDOs from PMIC
Figure 51 Equipment setup
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4.000V 0.0000A