Philips HTD3510/12 Service Manual page 24

Remote control does not work
Remote
does not work
Check whether the remote
controller's
exhausted or not.
In the
board,check
Waveform
YES
In the main board U20
pin 16 waveform
YES
Replace main board
control
Go
battery is
NO
front control
IR601 pin1
Yes
5-5
Yes
Replace the battery for remote controller
NO
Replace IR601
NO
Check the pcb layout
Trouble shooting Chart