Tenma 72-905 O'scope
On Jun 14, 7:31*am, "Phil Allison" wrote:
"Todd"
*"Phil Allison"
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.
** So you cannot centre the trace with the position control - OR - is
there
no trace, just a dot ?
Are both traces so affected ?
There is a trace not a dot and yes both traces are affected.
** Think it is something very simple.
Maybe an open resistor or a bad zener diode.
Check everything you can around that position pot.
.... * Phil
Ok thanks will look at it today
Todd
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