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I am not an expert in service monitors. But I repair a lot of old electronics, and not only in them, but also in my own E8285A, the problem is mostly the same - old tantalum capacitors. I'd begin

I meant to add that Amtronix sells a rebuilt supply with your exchange for about $ 350.? I got one of them about 10 years ago for about $ 250 I think.? ? I later repaired 2 of the supplies in other

Guaranteed to be bad capacitors. Attached is a repair guide for the 8924C from the old groups I downloaded and a list of caps I replaced in a couple of 8924 power supplies a while back. In your

It is probably some bad?electrolytes capacitors in the power supply.? That is a well documented cause of the 8924c and others of the series not coming on.? Many old switching supplies are like

My unit has stayed unused for several years as I have dealt with cancer. I went to check deviation of a a repeater last night and found that it would not turn on. I turned it around to see if there

anyone have the CLIP for the A2 card used in the 8920B/8924C ? This has the variable notch filter option. The one for the 8920A is close but have an issue surrounding the variable filter. The variable

Follow up: well I finally go to test it and it worked OK except I noticed after about 30 minutes it was dimmer. If I kill power and restart it it come back on bright. It never went away totally so

Don't forget to post your results here =) Em 19/04/2021 19:54, William Verstelle escreveu: -- ---8<---Corte Aqui---8<--- https://www.tabalabs.com.br https://tabajara-labs.blogspot.com

Ok thanks I’ll try none first then add if needed. Got chip already mounted on a board today so will try is soon. thanks Guys!

I didn't use them, and it worked... Em 18/04/2021 22:02, William Verstelle escreveu: -- ---8<---Corte Aqui---8<--- https://www.tabalabs.com.br https://tabajara-labs.blogspot.com

either will work.

The 50k resistors, how critical is that value, I have 47k and 56k will either of these work? I guess I could use 2x100k if needed. Bill N7OQ

Wow again, great information, I get my lm-1881 Thursday or wed. Will let you know how it works out, thanks everyone, Bill N7OQ

To use the GBS-8200 converter with the hp-8924c service monitor to use with an external VGA monitor. Obtain: 50 K ohm SMD resistors 4 required LM1881N IC sync seperator.1 UF capacitor--2 required680

My guide: https://tabajara-labs.blogspot.com/2021/01/como-ligar-um-monitor-vga-no-hp-e8285a.html ---8<---Corte aqui---8<--- http://www.tabajara-labs.blogspot.com http://www.tabalabs.com.br

Bill Here are a couple of old things i saved re getting the GBS-8200 workings with 8924 from the old Yahoo groups. There is also one on power supply repair plus some notes on power supply caps I

Hi group, I want to replace the CRT monitor in my 8924 and bought a GBS-8200 board. Well I saw a picture where they plugged it into the green (Y) rca jack on the 8200 board and this worked to a degree

Thank you everyone, I’ll order 105 degree caps and do a recap. So far everything else seems to be working. This is a great forum. Bill N7OQ

As others said, it is most likely the capacitors.? About 90% or more switching supply problems are the capacitors. I had an 8924c that acted similar.? I took a hot air gun from a SMD rework station

there is a write up in the files section ...or at least there used to be from the old hosting service. usually you are missing the green led on the rear of the unit which is the 15 volt standby