Read Panasonic KX-DT521RU Service Manual Supplement online
13
2.3.
LCD Does Not Operate
Check the soldering.
Resolder or replace parts as needed.
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?
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?
CN460.
Is it about following voltage?
[DT521] : 6.5V
Note)
"LCD contrast" must be default setting (Level 3).
"LCD contrast" must be default setting (Level 3).
YES
Related parts:CN460,R434,R436
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?
Is it working?
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