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Old 26th Jan 2021, 4:55 pm   #5
MikeCross
Tetrode
 
Join Date: Sep 2016
Location: Tring, Hertfordshire, UK.
Posts: 64
Default Re: Telequipment D67 Fault

I have managed to see that the collectors of TR251,TR252 and TR259 produce the correct pulse signals but the signals on the base of TR254,TR256 and TR258 are uncontrolled distorted square wave signals.
I have now lost the green trace on switch off.
I would like to be able to re-solder the thro links as my poking about may have made these worse.
What is the easiest way to get to the back side of the pcb.
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