Author Topic: 87V schematics!  (Read 3027 times)

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Offline TiN

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Re: 87V schematics!
« Reply #25 on: December 07, 2018, 11:08:05 am »
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Offline retiredcaps

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Re: 87V schematics!
« Reply #26 on: December 07, 2018, 08:08:23 pm »
Thanks Chris.

In a time of crappy unboxing youtube videos, 99.9% of the people would look at the CD and think it was a digital copy of the user manual, legalese, etc and just chuck it aside.

So thanking for actually looking and posting the information.  It will make fixing 87V in the future easier for us.
 

Offline mzacharias

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Re: 87V schematics!
« Reply #27 on: December 08, 2018, 11:51:50 am »
Thanks Chris.

In a time of crappy unboxing youtube videos, 99.9% of the people would look at the CD and think it was a digital copy of the user manual, legalese, etc and just chuck it aside.

So thanking for actually looking and posting the information.  It will make fixing 87V in the future easier for us.

The 87V service manual did not come from the CD packed with new units. It was on a burned CD I picked up somewhere.
 

Offline 001

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Re: 87V schematics!
« Reply #28 on: December 08, 2018, 03:31:26 pm »
Can anybody tell me how input protection works?

I see 910V varistor  (?) rated at too high voltage isnt it?
 

Offline tsman

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Re: 87V schematics!
« Reply #29 on: December 08, 2018, 04:27:12 pm »
Can anybody tell me how input protection works?
Fluke explains how it works on page 11+ (actual PDF page 19+)

I see 910V varistor  (?) rated at too high voltage isnt it?
The MOVs are only there to prevent arcing across the switch.
 
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