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Author Topic: Restoration glory of Keithley 2001 DMM  (Read 154089 times)

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Offline connor

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Re: Restoration glory of Keithley 2001 DMM
« Reply #700 on: April 12, 2017, 08:25:23 PM »
My 2001 have a  power problem ,when the power on, the R100(470?) is very hot, there have no voltage output? anyone know the reasons and how to fix it ?
 

Offline TiN

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Re: Restoration glory of Keithley 2001 DMM
« Reply #701 on: April 12, 2017, 09:13:43 PM »
MOSFET is likely dead, perhaps because of capacitors went poo and leaked stuff around, causing disasters.
Replace all capacitors, clean all goo very carefully, check every component in affected areas, then try again :-BROKE.
I'd suggest first not connecting secondary power to analog board to prevent more disasters, before you sure power supplies are good.
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Offline kazik70

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Re: Restoration glory of Keithley 2001 DMM
« Reply #702 on: September 02, 2017, 06:12:30 PM »
Hi, I need to know the resistance between GND and +15v, will you help?
 

Offline plesa

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Re: Restoration glory of Keithley 2001 DMM
« Reply #703 on: September 03, 2017, 01:32:55 AM »
Hi, I need to know the resistance between GND and +15v, will you help?

What is idea behind? 1st check the transformer output voltage disconnected and check the +15V regulator and rectifier, all are close to each other.
 

Offline kazik70

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Re: Restoration glory of Keithley 2001 DMM
« Reply #704 on: September 03, 2017, 02:15:06 AM »
I do not have to check, because all power supply are ok.
There was a crash on the + 15v line and I do not know if I've caught all the broken chips.
I have 74ohm on this line. Not too much. Will you check it for me, please?
I would like to make an order for parts, but I do not know if it's all over.
 


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