[TinCanAlley]

Originally Posted by Findm-Keepm

'taint the flyback - most likely a filter cap in the B+, particularly the cap(s) feeding the horizontal driver/output and boost filter. Those Zenith flys usually arced internally when they fail, causing snivets and tearing in the picture.

What signal source are you using? RF Modulators in VCRs can cause this, as well as your humble cross-hatch generator.

I've also seen bad IF cables cause jailbars - usually the result of someone jerking too hard when removing them. Really bad on lowband VHF, which is what we use with most modulated signals now (Channels 3 or 4). It could be an IF cable isn't plugged in all the way , leaving a ground loop.

Check the caps first, then the IF Cables.


Cheers,

Would the caps for the B+ be in the large canister? I've changed all other electrolytic caps except for the canister. I can't find a replacement and the replacement 400uf caps are 23 dollars each and requires two of them. The two 500uf caps are cheaper.

I was using the RF in the VCR as well as an RCA external modulator for my DVD and Roku players. The effect is still there no matter which one I use. I'll open the back tomorrow and check the IF lead.