Analogue scope not triggering
I have a 1970s Telequipment D61a which will not trigger. Altering the trigger level control or setting it on auto has no effect. I can sometimes get a stable trace by adjusting the time base. It is then only stable on one particular setting. I have a service manual and have attempted two adjustments, ‘trigger sensitivity’ and ‘sweep stability’ but no effect. It is the same on both channels.
As this seems a relatively simple scope, with no chips and the transistors are all in sockets, I thought I might be able to repair it. Apart from the triggering it works fine!
Could you point me in the right direction?
Thanks
Andrew
I have a 1970s Telequipment D61a which will not trigger. Altering the trigger level control or setting it on auto has no effect. I can sometimes get a stable trace by adjusting the time base. It is then only stable on one particular setting. I have a service manual and have attempted two adjustments, ‘trigger sensitivity’ and ‘sweep stability’ but no effect. It is the same on both channels.
As this seems a relatively simple scope, with no chips and the transistors are all in sockets, I thought I might be able to repair it. Apart from the triggering it works fine!
Could you point me in the right direction?
Thanks
Andrew