RM-583
Baseband Description and Troubleshooting
Keypad faults (refer to Keypad circuitry)
Keypad is a separate FPCA connected with main board through a keypad connecter, so when there is
any keypad defect, follow the instruction below:
1.
check keypad FPCA;
2.
if FPCA is ok, check the connector in case any soldering issue;
3.
if the connector is ok, turn to check and analyze main board.
Keypad faults troubleshooting
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