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Main => Monitor/Video Forum => Topic started by: aqibi2000 on December 13, 2019, 08:51:08 am

Title: Need help from CRT repair boys. Polar T3000 Curve Tracer
Post by: aqibi2000 on December 13, 2019, 08:51:08 am
Hi

Iím after some help to improve the brightness of my Polar Instruments T3000 (same as T2500/T4000/T6000)

The trace is very dim and Iím thinking I need to either increase the heater voltage or (hope not) rejuvenate the tube.

Can anyone help, no schematics on this unfortunately.

Photos attached
Title: Re: Need help from CRT repair boys. Polar T3000 Curve Tracer
Post by: opt2not on December 13, 2019, 05:41:48 pm
(hope not) rejuvenate the tube.
Why do you hope not, to rejuvenate the tube?  I've just rejuv'd the tube in my Donkey Kong Jr., and was successful and now displays fantastically bright.

If rejuvenation scares you, there's also a clean and balance option that most rejuvenators have, and is low impact and won't affect the life of your tube. You could try.

But, first thing is to probably do the standard check for cold solder joints (https://www.quora.com/What-is-a-cold-solder-joint), especially around connection headers and the neck board. Then perhaps new electrolytic capacitors could be a good stab at getting your brightness up.
Title: Re: Need help from CRT repair boys. Polar T3000 Curve Tracer
Post by: Ken Layton on December 14, 2019, 10:28:05 am
How about a picture of what this thing looks like fully assembled from the outside? As a person would use it.
Title: Re: Need help from CRT repair boys. Polar T3000 Curve Tracer
Post by: jennifer on December 14, 2019, 04:52:10 pm
That is not entry level repair, and will most likely require calibration after any work... The monitor (guessing) would not have seen enough on time to require rejuvenation, and a brightener (more heater voltage) will shorten the life of the tube substantially with little if any short term benifits...Opt2 has sound advice with the caps however, Jenn would start there, with a quality  tester, even with new replacements.