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4. Troubleshooting
BaseBand Part Troubleshooting
4.1 Power On Trouble (1)
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Power On Sequence
- Connecting Battery
- Power-On Key Detection
- END_ON_OFF signal goes to ABB and then ABB reset DBB by ON_OFF signal
- ON_OFF turn low(0V) to HIGH(2.8V) and it resets Calypso(DBB).
- All LDOs are turned on.
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Check Points
- Battery Voltage
- Power-On Key Detection(END_ON_OFF signal)
- Outputs of LDOs
Power On Trouble (2)
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Trouble Shooting Setup
- Connect PIF-UNION to the phone.
-Set the TI-remote switch at PIF-UNION off.
•
Trouble Shooting Procedure
- Check Battery Voltage
- END_KEY Dome Switch condition
- Check the output voltages of all LDOs.
POWER ON KEY
KB801
PWON
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Summary of Contents for LG9200
Page 3: ... 4 Z 3 X B O X C O M ...
Page 107: ... 120 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 108: ... 121 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 109: ...8 PCB LAYOUT 122 Z 3 X B O X C O M ...
Page 110: ... 123 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 111: ... 124 Z 3 X B O X C O M ...
Page 116: ...9 Calibration 129 E Calibration Equipment Setup Z 3 X B O X C O M ...
Page 123: ... 136 Z 3 X B O X C O M ...
Page 142: ...Note Z 3 X B O X C O M ...