Power On Trouble - LG G5500 Manual

4.5 Power On Trouble

4.5.1 Power On Sequence
Connecting Battery
• Power-On Key Detection
• PWON signal goes to ABB and then ABB reset DBB by ON_OFF signal
• ON_OFF turn low(1.5V) to HIGH(2.8V) and it resets Calypso
4.5.2 Check Points
• Battery Voltage
• Power-On Key Detection (PWON signal)
• Outputs of LDOs
4.5.3 Trouble Shooting Setup
• Connect PIF-UNION to the phone
• Set the TI-remote switch PIF-UNION off
4.5.4 Trouble Shooting Procedure
• Check Battery voltage
• END_KEY Dome Switch condition
• Check the output voltages of all LDOs
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