Technical > Electronics > Tektronix 485 - no power up

reply to neonhomer

Re: Tektronix 485 - no power up

You mean unplug the high voltage lead, or all the wiring to the CRT?

all wiring to the CRT (leave the HV in)

Oi vey.. that's going to be a bitch.......

I had the power inverter board and the sweep board out last night, and it was a bitch to get apart.

It says I can pull certain combs to isolate certain areas. I do know if I pull the "R" comb, the "clicking" goes from slow to fast.
--
"F is for Fire that burns down the whole town...
U is for Uranium...... Bombs...
N is for NO SURVIVORS!!!!!" Sheldon Plankton

I'll look it up. How fast is fast?

reply to neonhomer

You pull the rear cover, and there are three connectors..... one has 3 wires, and two that have one wire each....

Pull them all off. The big HV lead goes to the tube anode, you can leave that in.

Haven't forgotten. Just don't feel like opening this thing back up right now. Will probably open back up after the kids go to bed in about 45 min or so.

Oooookay... Pulled the three connectors that go from the xfmr board to the crt. Nothing. Same thing.

Walked through some of the tests on 4-7. Nothing to note.

I think I have reached the limit of my equipment. I hate to have to send this to a shop, as I know it will be a few hundred $$$ to get it fixed.
--
"F is for Fire that burns down the whole town...
U is for Uranium...... Bombs...
N is for NO SURVIVORS!!!!!" Sheldon Plankton

Try and find a local ham radio club. Most of the old guys there (like me!) probably have an oscilloscope, and might be willing to help you track down the problem.
--
One man's Magic is another man's Engineering.

reply to neonhomer

I found a working Hitachi V1100A on Craigslist for $100.....

drjim - I could always ship this thing to you and let you play with it... LOL....