RCA CT187CH3 problem with remote control
 

I have a 32 inch RCA with a CT187CH3 chassis. I got it 2nd hand so I
don't know any of it's service history. Had no picture or sound got,
Resoldered multiple spots on board and then got an hourglass shaped
raster. Resoldered a diode CR4403 I think and got picture back.
Picture looks great tunes and adjusts fine with manual
buttons on front of set.

But when I use a working RCA remote on the set..doesn't matter if I hit
volume up/down or channel up/down I get the same result. Picture
breaks up and sound cuts out..sometimes picture/screen blacks out..as
soon as I let off the button picture returns on the same station and
volume setting as before. I get the same result regardless what key on
the remote I hit.

I think I may have caused a solder bridge somewhere...Anybody have an
idea where? or any other ideas. Like what pins on an IC might control
the remote? and be a problem? I did some soldering around the outside
of the tuner grounds? could I have screwed something up there?

I tried to clear up some potential solder bridges with some solder
wick...and the remote did work for about 5 minutes then went right back
to same behavior.

I am a novice so give me advice in detail.

Thanks

Spit

I would guess that the input on the microprocessor ic from the remote
receiver is soldered bridged to another leg of the IC.
Another possibility is the B+ is dropping on the IC with the remote
receiver in operation maybe due to a weak regulator.
Other than that either the remote receiver or microprocessor
Never come accross that problem before
Doug.

Thanks for the reply I am looking for a solder bridge but not having
any luck..would you have any idea which IC i should be looking at and
which leg? I kknow I'm asking for a lot but I'm really bumping around
in the dark. Everything (manual controls on front of set work fine)
volume up/down channelup/down & menu. But when I try any of these
functions on the remote the picture flashes white horizontal lines and
then blacks out for a second and then comes right back in on the same
channel and volume settings it was prior to pressing any buttons.