JVC D Series Horizontal Smearing on the Composite Input

[vol.2]

Originally Posted by BenM86

If it was an issue with the output or with the tube wouldn't it be the same across all the inputs?

Yes, it would, assuming the brightness/contrast is tracking correctly on the other inputs, and you would probably notice it if there was that big a difference.

Sorry, I didn't read your post carefully enough.

As tvnut pointed out:

Originally Posted by old_tv_nut

Whatever it is, it must be something that is in the composite input circuit and not in anything common with the component signal.

So that should actually make things a little easier, assuming you have a schematic to reference.

The first thing I would check is to see if there is a video signal level in the composite video section. If that pot exists and it's set too high, I think it could cause the smearing you see to the right. Like I said, I don't know JVC, but I've seen that on other Japanese sets for sure. The service manual should have a voltage level to set it at (if it exists).

If not, then focus on the parts in the composite input circuit. Check voltages everywhere and compare against the service manual. If anything looks fishy, pull caps and check them.