Z-4000

Depends on what the actual problem is.

Example, being stuck in program- that indicates a control board issue in theory.

You said bad throttle potentiometer, however my concern would be a power board failure on that channel.

Provided they are the same series, either both early or both late, you could swap boards.

what are the serial numbers on the back of the transformers 0398 etc or 1204 etc the 0398 are the oldest ones! Alan

ps send me an email in my profile to don't have any email on file! hard to help without that!

@MGA2307 posted:

Anybody here ever take 2 faulty Z-4000's and make 1 that did work?  One is locked into the program mode, and the other has a bad potentiometer.  Thoughts???

TYIA.

Ray - Black Diamond Society of Model Engineers

I think the pot is a fairly garden variety 10K pot if I recall.  I bought a few to replace one years ago, I probably still have the rest somewhere.

GRJ... both Z's I am referring to are 25 years old.  Just fyi.  Are they worth fixing?  🤔

Ray

They're still a nice transformer, I'd fix them if they were mine.

yes there definitely worth fixing, I repaired 4 Z4000 for clients last year for York tca meet in October!

Alan

There is a capacitor across the control buttons on the control board.  A common failure is the capacitor shorts and the button basically stays depressed.  Worth checking.

Thanks, GRJ...

I will send a separate email to Jon G about these 2 Z's.

What I found in the last hour are the two serial numbers:

Korea mfg:  039814141

Thailand mfg:  090538288

After your recommendation of Jon G, I did a search of his prior posts to see if he had already posted any clues on the Z's.  As a matter of fact he was one of several people discussing the potentiometers of the main throttles on a couple of Z's.  Within that thread was a post from Alan Mancus that mentioned Z4000 serial numbers, stating that 0398 was the of the earliest series.  Bingo!...Korea preceded Thailand in production sequence.

It's a start.

Thanks, again!

KD