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Only for training and service purposes
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4. TROUBLE SHOOTING
4.8 LCD Troubleshooting
LCD control signals are generated by QSC6270.
The signal path is : QSC6270 Æ CN102 Æ LCD Module
LCD Troubleshooting
Press END key
Key LED is on?
Yes
Change the Main Board
Move to KEY LED Troubleshooting
No
LCD display OK?
END
START
Disconnect and reconnect
The LCD connector
(Slide PCB CN102,CN101)
LCD display OK?
Yes
Yes
END
No
No
Change the FPCB
Change SUB PCB
LCD display OK?
Yes
END
No