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cakerack · 3rd Mar 2021, 5:30 pm

OK I have another update! I was running the scope on its side so I could meter some signals and I left it running on its side (left side down). After about half an hour I noticed the square wave signal had sync'd perfectly (although it was still dim at the right hand side and I am beginning to think that is a different problem)! So - I turned it back the right way around and it continued to work. 10 mins later it lost its sync so I was wondering if the heat rising from the rest of the scope was warming up the S2A module. Long story short - hair dryer on the S2A PCB - I can now reproduce proper syncing at will, whenever I warm up the S2A board. Next chapter - I have a can of freezer on order and I will do some more digging.

I still have the dim side of the display when running any timebase slower than 50uS though...

Cheers

Sean

3rd Mar 2021, 5:30 pm	#13
cakerack Diode Join Date: Mar 2021 Location: Richmond, North Yorkshire, UK. Posts: 8	Re: Telequipment D75 Scope OK I have another update! I was running the scope on its side so I could meter some signals and I left it running on its side (left side down). After about half an hour I noticed the square wave signal had sync'd perfectly (although it was still dim at the right hand side and I am beginning to think that is a different problem)! So - I turned it back the right way around and it continued to work. 10 mins later it lost its sync so I was wondering if the heat rising from the rest of the scope was warming up the S2A module. Long story short - hair dryer on the S2A PCB - I can now reproduce proper syncing at will, whenever I warm up the S2A board. Next chapter - I have a can of freezer on order and I will do some more digging. I still have the dim side of the display when running any timebase slower than 50uS though... Cheers Sean