EEVblog Electronics Community Forum

Electronics => Repair => Topic started by: Deni on March 30, 2019, 08:31:56 pm

Title: Chroma 6404 issue
Post by: Deni on March 30, 2019, 08:31:56 pm

I have Chroma 6404 programmable AC source whose output slowly (over several seconds period) changes output voltage for ca. 1-2V.
I have service manual, but there's no schematics - only component layout. I would be VERY grateful if somebody has schematics and is
willing to share it...

Title: Re: Chroma 6404 issue
Post by: coromonadalix on March 31, 2019, 12:24:04 pm

Did you ask Chroma directly ??   maybe they would share it or provide it to you under a non disclosure agreement ?

Title: Re: Chroma 6404 issue
Post by: PTR_1275 on March 31, 2019, 12:34:26 pm

I’ve asked chroma for documentation before. Got the usual runaround of “we can’t provide it to non authorized service centers”, then got a email from the Australian service center with some absurd cost just for me to send it back and look at it.

If they’ve changed and you can get a service manual, I might try again

Title: Re: Chroma 6404 issue
Post by: harrimansat on January 02, 2020, 10:16:20 pm

I need it too, mine has short protection, but when I disconnect the current transformer it works.