T1 Question

[Gym]

Ment to post this sooner, but......

6700 Elco Chassis. Omega board.

Here's my shop tag notes.

- T1 out of E-7 (Chassis No.)

Not Coming on line when switched on either up front or down back.

Comes on line if reset with white CB on Master Control Panel. -

I replaced the T1 and the chassis has been running fine, but I can't seem to figure out what would keep this chassis from turning on fully. It's acting like term 3 on the M is bad. Pit light on and nothing else.

Don't have the heart to toss it. I mean heck, in a pinch I'll use it.

Any thoughts? Am I looking at the answer and not seeing it, as usual?

Thanks, Jim

[wb8yjf]

Not really following what your question is.

[Gym]

LOL! I guess I could have been a bit more clear. Note to self post before beers.

I can't figure out why the machine would not come on when switched on from either the front or the back, but if you flipped off the CB on the control panel then back on when switched on from front or rear the machine would come on. Every time.

Jim

[wb8yjf]

LOL - That doesn't really make sense! How are they being turned on from the front? LIU/frameter, something else?

[Toby]

That's a weird situation. Just taking a wild, wild guess here, but could that be misbehavior from a capacitor of some kind? Seeing as those are the only components that hold a charge. If you turn off the main circuit breaker and allow all of the capacitors to drain, and then it works... Eh?

Toby

[rivmike]

Something tripping the breaker? Maybe low voltage.

[PinCup]

If the T1 got switched out and problem solved (if I read you right), did the old T1 pass voltage tests? ei, correct voltage on all leads?

PinCup

[wb8yjf]

If the T1 got switched out and problem solved (if I read you right), did the old T1 pass voltage tests? ei, correct voltage on all leads?

PinCup

It might not be as simple as a simple voltage test - the transformer may need to be tested under a load (each winding) - this is where it gets iffy if you want to keep one of these transformers vs. just replacing it or cashing it in for the copper scrap.

I'm just gonna say, it's really not worth the effort - replace it and toss it in the recycle pile & fill up your tank after the next scrap run.

[Gym]

LOL - That doesn't really make sense! How are they being turned on from the front? LIU/frameter, something else?

Managers control, scoring or the Mechanics switch. Barry White and wine would be listed under "something else"

[Gym]

That's a weird situation. Just taking a wild, wild guess here, but could that be misbehavior from a capacitor of some kind? Seeing as those are the only components that hold a charge. If you turn off the main circuit breaker and allow all of the capacitors to drain, and then it works... Eh?

Toby

Hey Toby! Nice thought, but the old Caps have been removed from these chassis.

[Gym]

Something tripping the breaker? Maybe low voltage.

Funny you should mention this. This T-1 is one that had a problem kicking the CB a few years back before I got back to Rocky. Turned out that the yellow trans lead going to the CB had gotten cut just enough to ground out at the T-1 body. I did a little cosmetic bending and a dab or 2 of RTV solved that. Hmmmmmm. That's got me to thinking.

[Gym]

If the T1 got switched out and problem solved (if I read you right), did the old T1 pass voltage tests? ei, correct voltage on all leads?

PinCup

I do not know how to do this, but would love to learn.

[Gym]

It might not be as simple as a simple voltage test - the transformer may need to be tested under a load (each winding) - this is where it gets iffy if you want to keep one of these transformers vs. just replacing it or cashing it in for the copper scrap.

I'm just gonna say, it's really not worth the effort - replace it and toss it in the recycle pile & fill up your tank after the next scrap run.

LOL! Sometimes I get the dirt at Rocky for trying to bring stuff back to life.

[Toby]

These printed circuit boards are nothing but trouble. Get some steppers and put your feet up, buddy!

Toby

[Toby]

Come to think of it, I'll run this question past my father when I see him on Tuesday. He restores antique radios, and in dire situations he's been known to disassemble transformers and rewind them by hand. Might have some insight into these unusual behaviors.

Toby