[TinCanAlley]

Originally Posted by BeamT

I'm assuming you have the set back up and running, and the jail bars are visible.

Try this:

1) Gently disconnect the IF Input cable from the tuner to the chassis. At the chassis it is very similar to an RCA connector. Power up, jail bars still visible? Power down.

2) Remove the IF Module. Power up, jail bars still visible? Power down. Leave the IF Module out.

3) Drive the video stages with one of your generators. Most generators will block a small amount of DC but to be safe, connect the 50 Ohm video output through a .1 uf or so capacitor to block the DC. Connect to the C1 test point you have identified. Shield to a nearby chassis ground. Power up, adjust video level from the generator, try different patterns, what do you see?

Safety-- This is a transformer based set, so you should be reasonably safe using grounded test equipment, unless something is seriously wrong.

I appreciate my Sencore PR57 everytime I use it

Set isn't together yet. I'm waiting for the C202 and 204 replacements. Am also going over everything under the chassis to make sure I didn't disturb something and create a short. Once that is done, it goes back together on Monday or Tuesday, depending on delivery of parts.

The instructions with the Hickok says to ground the generator by connecting black lead to chassis. I wish it had more details on that since I had assumed the black lead went with the red lead which is the trigger out for my scope. That and I'm sure it needs another adapter of sorts as my scope's trigger input is a 1Mohm 20pf BNC. But that's another day's battle.