On Jun 14, 12:31*am, "N_Cook" wrote:
Todd wrote in message

...

Anyone have a source for a service manual for a Tenma 72-905 O'scope?
I have one that the horizontal trace stays on the left side of the
tube only. Figure it's a problem with the sweep circuit. Anyone seen
this?

Todd

With the power off check cold, initially, for differences between the 2
final X-drive transistors, usually long-tail paired.

Ok, thanks that will give me a idea where to look on the board.


Todd