Re: Telefunken CH815 - Too much width

Can I damage the set if I replace C712 with a 57nf cap instead of 33nf? I've got a polyester film cap that was removed from the horz. circuit of a PC monitor. It seemed to serve the same purpose as C712 in this circuit.

I checked the transistors, all the big ones, including T710, are untouched. The smaller ones seem to have been replaced before (I can tell from the burnt flux and bad solder job), but I already tested all of them a while ago, checked if they were the proper ones and resoldered.

I'll try checking the...

Re: Telefunken CH815 - Too much width

Thanks for replying. I'm attaching the full schematics.

On a side note, I replaced all electrolytics when I first got this set trying to fix some weird picture problems.

They were high quality Siemens caps that probably still worked fine after all these years, but I didn't have the schematics back then so I was trying anything I could think of.

In the end I found out that someone had messed with R711, making the "U2" voltage lower than 32v. Probably a cheap attempt to fix the width problem...

This is a solid state black and white tv. The picture is too wide. Someone mentioned to me that the capacitor responsible for the width may have gone bad. I have the schematics for this set and believe the capacitor in question is C606. It's near the "0.5" voltage rating in the attached picture of the horizontal circuit.

So, two questions:

1. Is this the probable cause for too much width, and in this circuit, is C606 the cap responsible for the picture's width?

2. This is a polypropylene capacitor. Those are expensive and hard to find. Can...

Re: New Members - please post your introductions here

Hey everyone. I love old electronics but most of the stuff you buy or scavenge needs some fixing. Hope I can get some help and maybe help others here. Have a nice day!