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Old 12th Apr 2018, 9:25 pm   #11
Silicon
Nonode
 
Join Date: Jun 2007
Location: Coulsdon, London, UK.
Posts: 2,152
Default Re: Telequipment/Tektronix D75 No trace on Power Up.

If you know the current taken by the circuit running off the 105V PSU, you could connect a Dummy Load to the 105V power supply to see if it is working correctly.

You will obviously check the 105V rail for short circuits and low resistances.
Your test meter output voltage will probably be 9V or less when you do that.

However, you may not find a problem that way if the faulty device only breaks down when it sees 60V or more.

If it really is 'sparking' you may get some results by turning off the light and working in the dark.

Have a torch ready.
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