Tek2215a maximum intensity problem
Hi,
got a Tek 2215a to repair. At start, caps on +5V was dead, making a
direct link between +5 and ground.
now I can see lines or signals on crt but wit maximum intensity, which
is not good.
Z-Axis logic is ok, if I turn either A or B intensity channel I can see
signal amplitude changing.
So problem comes from DC restorer, but even with service manual, I
can't see what's going wrong.
At the DC restorer's output (control grid) I only have the DC
component (which is -2 kv ??!!) and AC component from Z-Axis logic is
not here anymore. So I thought somes diodes where out but I checked
caps resistors and diodes all components seems to be ok. Also I checked
connection between DC restorer and CRT wires are's ok too. What can be
the problem ???
thanks and sorry for english level
Laurent
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