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From the same E3680A manual, here's the memory board location diagram attached. I just noticed the manual was mistitled upon upload making it hard to find so that's fixed now. E6380A Assembly Level

Rick, Thanks for the very helpful advice based on the actual experience of replacing that internal coin cell.? I'll eventually have to do this. For those that might be already planning a Digi-Key

Guys: I own an HP 6381A with the on-board back up battery on the memory board. Since these batteries are becoming increasingly difficult to find with the leads welded to the battery body, I recommend

Shane, Please take at least one picture of that board when you pull it out.? We don't have any picture of it now. Hank

Just found out the E6380A (electroluminescent version of 8935) has a coin cell for the internal backup battery, not a cylindrical like the 892X series. It's a beefy one rated 1 amp hour: CR2477.

Hi Shane, I am working on reviving a HP 8921A, that has the memory battery of 3V that is PCB mounted LIPO type. These batteries will supply quite a bit of current. The AAA Battery may be too much

Hello all, Just obtained an HP 8935 test set that has been sitting unused for several years. Upon power up the display indicated "AA memory battery low. See HELP menu" I removed the rear cover and

What is the Hi-Stab option module in the 8924C?? Does it power only the oven in stby or the osc. too? I was hoping to provide the capability in my 8920a with a 08920-61035. I haven't found a CLIP for

I tried a second A16 board. This one gives the same "Calibration checksum incorrect. Writing to default values" message, but continues to boot. At the completion of booting, it says something about

Not to Hijack, but what is the module in the 8924C?? Does it power the oven only or the osc. too? Actually, I have also kept an old IFR with analog meters and TCXO calibrated at room temp after 5

ERROR 223 error is not caused by the power supply PSU, it should b

thanks for the info but unfortunately my power supply put on another 8920 works correctly (at least when I tested it a while ago) now I also have other problems and, perhaps because of me. I am angry

On Tue, Aug 9, 2022 at 06:00 PM, @DonBox wrote: > > On Tue, Aug 9, 2022 at 05:34 PM, zl1cvd wrote: > >> I have seen 2 causes for this type of fault. >> * Faulty power supply - check all power rails

*Thank you for your reply and suggestions.* *Power supply on the electrolytic capacitors I have replaced all, A19 on the J1 detection point +5v and -5v are normal, currently suspected of A19 data

I have seen 2 causes for this type of fault. * Faulty power supply - check all power rails are the correct voltages. These units all suffer from dry / cracked caps in power supply. The cure is to

ok thank you i hope you can solve it as soon as possible i can't do anything about it now, as soon as i have the .bin file i'll upload it to the new eepromm and test it unfortunately i have to do it

This phenomenon, which I have also encountered, seems to be that certain motherboards are not plugged in properly. -- Regards, Box

-- Regards, Box

Now I can't operate anything except I can move the cursor when I turn on the computer. So after I fix ERROR 223 (A19 board), if I can operate normally, I can try to download the BIN file of A7 board

ok it doesn't matter to me, I've bought a new 28c and would like to try programming it with a definitely working .bin file to see what happens if it's not a problem for you it would be appreciated