HP 9872T Trouble Shooting

[husmann]

Thanks for your reply.

(06-09-2018 08:56 PM)Paul Berger (Canada) Wrote:  There is a service guide for the 9872C/T at hpmuseum.net along with user manuals.

I have found no mention of my plotters behaviour neither in the “Operating and Programming Manual” nor in the “Service Manual”.

The “Confidence Test” cannot be started: the plotter simply ignores flipping the test switch on the rear panel to 1.

The internal red push button (reset) sometimes stops the noise (at least as long as the red button is pushed) but the self test cannot be continued because the green push button (continue) is ignored.

Help! ;-)

Wolfgang