DIYbanter - View Single Post - Old Tube TV Keeps Changing Channel to Channel 2: Hitachi CT-1955NP85XA Chassis / 19" Color-1984 Purchase

rickman

wrote on 6/29/2017 5:02 PM:
Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before?

A friend had one of those big console TVs that would work, but there was
something wrong with the controls, I don't recall just what exactly. I
suggested he unplug the set for a while to let the caps drain off and the
processor reset. It worked sure enough! I expect a power spike of some
sort glitched the processor and it was working, but some variable was hosed
messing up the operation. A clean reset got everything working right again.

I guess that's not your problem.

--

Rick C