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Hi, the problem is on the control board of the input module. We had several do that and just replaced the board. Rick

I have never seen that issue but I suspect the usual? parts going bad ...input detection diodes and op amps. It would be good to verify the power detect output as the power in scales ...I would

Hi all... This is a weird one...? ?I have been servicing HP8920's / 8922's for years for a radio shop but this one is above all...? ? ?HP8920, option 011... When connected to a 25W or less

Skip, Thanks for your followup post.? The picture did not attain the quality that could have been achieved. A few of the new members are close to posting correctly on Groups.io, but not getting it

Yes, valid point,? image attached (I hope).? It looks a LOT worse "in real life". Additionally I had it on while doing other things and it eventually turned completely white.? I guess I need to add

Skip and the whole gang, ?I guess?I can't say this enough:? Pictures! Help potential responders (like A.S., but he's not the only one) be able to help you.

Hi Alexandre, I followed your build and it kind of works, but my display is nowhere near as sharp as yours. I can't get my display centered vertically and there's lots of garbage below the image and

Hi Dean, I would check R3 that goes open a lot. It's a 470K and is near the 120 or 240v fuse holder. Rick

Thanks John, I'll check it. Thanks for your response Regards Bill M.

Sold.

These are duplicates that I don't need. I haven't tried every one of the programs in my HP8920B, but the ones that I did seem to work fine. It looks like the EDACS tools also does conventional

Yes, well no.? Not ON, plugged in!? If nothing else the fan noise would have driven me (more) insane by now! 73's Skip WB6YMH

Normally the A24 attenuator is easily verified.? If it's the standard 60 Watt input than you should see 14 dB. But if brings the measurement back in line than you should see something different.?

With the 8924C, leaving it on is quite different to leaving it plugged in. I can understand not leaving it on. Besides the wear and tear, it consumes a fair amount of power, and more importantly to

Good idea to not leave it on.? 14 years of solid ON is really extreme and probably a "personal best" for all of us gathered here. ______________________________________________________________

Confirming the usual, replacing the 47 uF fixed it. That capacitor had been replaced in 2009. I don't use my 8924C regularly, but it's been plugged in 24/7 since 2009 "just in case". I really don't

Thanks.? I have replaced the load resistor in the A24 assy., so It is a lot better than it was before. It looked like the user had left the TX on while he went for lunch! I think I will believe the

Hi Bill, I have an 8920 and the power supply is also dead. A fellow ham said he could fix it - but that is now 2 years ago. I know nothing about switchmode power supplies so am not prepared to touch

On the 8924, which is like 8920's, there is a PERCAL or periodic Calibration internal routine. You need well calibrated 6 digit voltmeter & one of the steps is to enter reading of + & - rails on the

Tru Dat! I have found as much disagreement among a handful of Bird slugs and/or cables.? There is actually a closed loop test for the 8920 to verify your cables first.