Check the Solder state and pin of Connector JP10
Check the Solder state in Key Board.
Check the I2C between Micom and EEPROM.
Check the Flash Memory or SDRAM.
13. Key
Key switch is OK but the key does not function
Preliminary Checkpoints
Check the key1,key2
(Pin 124,125)
of IC SDA6001(U29)
Control key is O.K. but
the Function does not
operate.
Check IR processor
(UP1)
Exchange the Digital Board
Waveform 26
Check Control Key Board
and Power in LED Board
Exchange the IC(UP1)
NG
OK
OK
Check the Micom part
(IIC Comunication, other
Control line)
Exchange the IC(U29)
NG
OK
OK
NG
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