On Mon, 05 Mar 2007 04:30:25 GMT, NeverExpectPowerAlways
put finger to keyboard and composed:

Franc Zabkar wrote:
On Sat, 03 Mar 2007 03:38:22 GMT, NeverExpectPowerAlways
put finger to keyboard and composed:

I hope I've come to the right place to get some helpful hints.

I am working on a Mitsubishi TV, model CS-2056R, made in 1988,
specifically, the IR remote receiver circuitry.

The remote function for this unit began failing some time ago.

I have (had?) an intermittent IR fault with a Mitsubishi set of
slightly earlier vintage. The problem has not recurred since I
replaced the caps in the IR module.

Anyway, I just wanted to ask whether your picture tube is still good
after all these years. The contrast in mine seems sharper than many
new sets.

- Franc Zabkar

The picture is still fantastic.

That's been my experience with the majority of AWA/Mitsubishi sets.
IMO CRT technology seems to have taken a retrograde step.

It's seems as good as new. That is why I
tried to resurrect the remote control function rather than junk the set.

I, too, thought that it may be the electrolytic caps and I replaced the
three that I saw in the IR module plus about 10 or 12 on the main board.
Past experience and the post linked below led me to try that first:

http://groups.google.com/group/sci.e...a8b6d332f0380f

In my case, though, a $4 Radio Shack IR receiver module finally did the
trick.

My set uses a "discrete" sensor based on an M51014L IR
receiver/demodulator. To use a modern sensor, I would have to redesign
the PCB. Fortunately the IC is still available for around AU$4.

- Franc Zabkar
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