27
KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B
8.3.
LCD Does Not Operate
Check the soldering.
Resolder or replace parts as needed.
Related parts: CN460,D460,C460-462,C464
NO
YES
Confirm the voltage at Pin7 of CN460.
Is it about 3.3V?
Related parts:C465,C466,C467
Related parts: L460,R435
NO
NO
Confirm the voltage between Pin 12 and Pin 13 of
CN460.
Is it about following voltage?
Note)
"LCD contrast" must be default setting (Level 3).
YES
Related parts:CN460,R430-432,R434,R436,R437
NO
YES
Confirm the waveform SCLK at TP:SPI_CLK.
Refer to the waveform (13).
Related parts:LCD module,CN460
NO
YES
Confirm the waveform at Pin 3, 4, 5 and 6 of CN460.
Refer to the waveform (14),(15).
YES
END
Confirm the LCD display.
Is it working?
[DT546]:13.8V / [DT543]:10.0V