Read Panasonic KX-HDV20RU Service Manual online
14
KX-HDV20 Series
8.2.
LCD Does Not Operate
Note:
Refer to waveform(4) in Waveform (P.22)
Yes
END
Yes
Related parts: CN101,L106,C146
Measure the voltage at Pin8 of CN101.
Is it 3.3V?
Is it 3.3V?
Related parts: R158,C147,C148,C149,C150
Measure the voltage at Pin15 of CN101.
Is it about 16V?
Is it about 16V?
Related parts: C128,C163,C164,C166,C167
L110,L204,R162,R161
L110,L204,R162,R161
No
No
No
No
No
No
Confim the LCD display.
Is it working?
Is it working?
Yes
Yes
Related parts: CN101,LCD Module.
No
Yes
Confim the LCD backlight.
Is it working?
Is it working?
Related parts: IC101,R137,C165,R138,Q101
C112,L114
(Self-Backlight PCB)
D625-D628,R625-R628
C112,L114
(Self-Backlight PCB)
D625-D628,R625-R628
No
Confirm the waveform Pin 1,2,4,5 of CN102.
See the communication waveform(4)*.
See the communication waveform(4)*.
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
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