WG6100 jitters

Hello Crew,

I am having a small problem with my WG6100 Tempest monitor: the screen jitters
in the X direction (mounted in the cabinet this becomes the y direction).

The trusty o'scope shows a DC negative offset of about 2 volts at the output of
the X amplifier. On this level a high frequency noise is added which shows up as
jerky vectors like this:

_____/\__/\____ (should be _____________ )

This effect shows op on both negative and positive side of the amplifier. (the
screen jitters both at the most upper as lower side, but it is always positive
going as in the example (ie. it is really DC offset noise, the amplitude is
always constant).

-I have resoldered the whole X amp (actually the whole defl. board)
-I have made sure the power supply outputs are nice and flat
-I think there are no wirewound resistors because they are the same at the Y amp
(and shouldn't that cause amplitude noise?)

Can anybody give me a clue here, like which parts can cause the DC offset of the
amplifier to behave like this?

any help is greatly appreciated because my analog knowledge seizes here... :(

Cya !
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Received on Sat May 13 16:28:45 2000