[TechAssist] Re: Zenith B27A20ZC 9-2071 no remote functions
- From: "C&W Electronics" <c_w_electronics@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 13 Jul 2003 12:48:37 -0500
Scope the leads on the IR rcvr. All should be DC, clean. One will be ground,
one 5v dc and the output. If you see any p-p waveform on any of the leads,
then you have either defective solder connections or corrupted tac switches in
the control ckt.
When receiving a signal from the remote, you will have apx 5v p-p (clean
pulses) on the data line. If you have a lot of 'trash', along with the remote
signal, then you MAY have defective connections (h-v ckt), (key-board ckt) or
corrupted tac switches on the key-board.
One 'strange' item that will STOP remote operation, is the 'earth' lamps, some
flourescent lights and most ALL flourescent screw-in lamps. But, all of these
will show up as trash on the rmt rcvr data line.
Good luck,
Paul W
C&W Electronics
Azle Texas
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