19" Sanyo from 1992 that isn't worth fixing

[radiotvnut]

Back in the '90's and very early 2000's, I was seeing a good many Sanyo sets from the 1990's and they were usually easy to fix. They produced a good picture and were better than many of the other bargain-basement TVs.

A few years ago, an older guy that I know brought me this 19" Sanyo for repair. The set worked well, after replacing some bad capacitors, touching up some bad connections, and touching up the greyscale.

A few weeks ago, the owner called and said the TV would not turn on and would I look at it. When he brough it, there was no activity (not even a relay click). The 12V for energizing the relay was down to about 9V and the 5V stand-by was at about 3.7V. Before digging further, I jumped the contacts on the relay, to see if the HV would come up. When I did that, one of the rectifier diodes shorted and blew the fuse. I replaced all 4 diodes, just to be on the safe side, and the fuse. Now, with the relay still jumped, I had HV and snow on the screen.

The stand-by voltages were still low and after doing some digging, I found the problem to be a defective remote receiver. After removing the remote receiver, the stand-by voltages came up to normal and the set powered on and off as it should have.

I dug around in my junk and found a remote sensor, but something told me to turn it on one more time before installing it. When I pressed the power button, the relay clicked, no HV, and then the relay let go. These sets have a protection circuit that will de-energize the relay, if horizontal drive is not detected.

After doing some checking, there was no drive at the base of the horizontal driver transistor and even though I'm not 100% certain, I suspect the jungle IC (I have no schematic for this set).

I feel like lightning hit this set and even though it might not have fully blown out parts, it might have weakened them to the point of blowing out the next time voltage hit them.

Assuming the jungle IC could be found and assuming that it fixed the drive problem, the tuner could have been fried, or it could have played for 5 minutes and something else would have failed.

In the past, it's been my experience that sets that experience one failure after another before my very eyes are going to be nothing but trouble and there is no need in spending time on them.

This was going to be a free repair, but the owner is the type who'd insist on giving me something. Whatever he gave me would be too much, especially considering that his set might not hold up and considering that sets like this often turn up for free or very cheap.

This guy really does not want to replace this set with a flat screen and I can understand that, but there comes a time when you have to let something go. I watch a 38 year old 19" Zenith TV and if it takes a dump, I'll fix it as long as it's quick and cheap. However, if it looks like something that is going to require a lot of money and/or time on my part, it will go bye-bye and be replaced with something else.

As far as his Sanyo, If I had a 19" BPC or SPC set, I'd give it to him, but I normally don't even take them because they are too hard to get rid of.