
3-9
Re
m
ote
reception
is
insensitive
or
fails.
No
Remote reception is
insensitive or fails.
Check if the remote
control works properly.
Check battery
Check R315.
Use an oscilloscope to check if there is
output waveform from the first pin IR of the
remote censor after pressing button on the
remote control.
Check the PIN 11 RC waveform
of IC1 on the remote PCB
Check if there is IR
signal on pin 109 of U1
Check if the power supply
voltage to the remote censor
is normal are normal.
Go
No
No
No
Yes
Yes
Yes
Correct connection
Yes
Change U1
IR waveform
Trouble shooting chart
Содержание DVP3980KX/77
Страница 28: ...Front Board Print layout Bottom side 5 11 5 11 ...
Страница 29: ...5 12 5 12 Power Board Print layout Bottom Side ...
Страница 30: ...5 13 5 13 Switch Board Print layout Bottom Side ...
Страница 31: ...5 14 5 14 OK USB Board Print layout Bottom side ...
Страница 32: ...5 15 5 15 Main Board Print layout Top side ...
Страница 33: ...6 14 6 14 Main Board Print layout Bottom side 5 16 5 16 ...
Страница 36: ...REVISION LIST Version 1 0 Initial release Version 1 1 Adding DVP3980KX 77 IM OPU 7 1 ...