401A signal generator not powering on

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inspectweld
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Joined: Tue Dec 26, 2017 10:11 pm

401A signal generator not powering on

Post by inspectweld » Wed May 26, 2021 1:45 pm

I have the old 401A signal generator and it will not power on. I have used it 3 years and no issues, Any suggestions on how to troubleshoot it? Thanks

robertspark
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Re: 401A signal generator not powering on

Post by robertspark » Wed May 26, 2021 4:25 pm

http://m.cncmanual.com/flashcut-cnc-sig ... are-guide/

just looks like a breakout board interface to me, nothing fancy

inspectweld
Posts: 56
Joined: Tue Dec 26, 2017 10:11 pm

Re: 401A signal generator not powering on

Post by inspectweld » Wed May 26, 2021 4:50 pm

robertspark wrote:
Wed May 26, 2021 4:25 pm
http://m.cncmanual.com/flashcut-cnc-sig ... are-guide/

just looks like a breakout board interface to me, nothing fancy
Sorry, It`s not the 401A Signal generator, I can`t remember the name of this box I have a pic of the box but can not figure out how to post it. its the box with the fan and on off switch on the front and where the x y and z wires plug in the back and it has the 3 circuit boards in it that I replaced about 3 years ago, thanks

inspectweld
Posts: 56
Joined: Tue Dec 26, 2017 10:11 pm

Re: 401A signal generator not powering on

Post by inspectweld » Wed May 26, 2021 4:52 pm

i already checked the power cord and replaced the small glass fuse at the power plug in on the back no luck

inspectweld
Posts: 56
Joined: Tue Dec 26, 2017 10:11 pm

Re: 401A signal generator not powering on

Post by inspectweld » Thu May 27, 2021 8:18 am

Found out it is called the Drive Box and Flashcut will not help me troubleshoot it

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WyoGreen
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Re: 401A signal generator not powering on

Post by WyoGreen » Thu May 27, 2021 6:12 pm

It sounds like the controller box, which would have a control board, 3 motor driver boards, a DC power supply, and probably some kind of breakout board. Trouble shooting would just take following the power. Get a voltmeter out, and start checking leads. I'd start at the AC in, making sure 120AC is making it to the power supply. If it does, then I'd make sure the DC (probably somewhere between 24 and 48 volts DC) is leaving the power supply going to the Driver boards. Everything should be somewhat labeled as to what the leads are.
Without some pictures, circuit diagrams and a little more system information, that's about the best I can suggest.

Steve
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