Toshiba BDX2500KU Service Manual page 49

Remote reception is insensitive or fails.
Remote reception is
insensitive or fails.
Check if the remote control
works properly.
Check if the power supply
voltage to the remote sensor
is normal.
Use an oscilloscope to check if there
is output waveform from the first pin
IR of the remote sensor after pressing
button on the remote control.
Check if there is IR signal
on pin G5 of IC4001.
Correct connection.
Go
Yes
Yes
Yes
No
11-9
No
Check battery.
No
Check R103 or replace Front PCB.
No
IC100 (PIN1 - RC waveform)
Yes
Change IC4001 or replace Main PCB.
IR waveform
Trouble shooting chart