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Often times it is the capacitors on the power supply board.? Not familiar with the 8285 boards, but on the 8924 there is a vertical board on which the capacitors often go bad and the unit will not

I was reading through a thread in the archives about capacitor problems in power supplies. Other than not turning on, can anyone shed some light on symptoms? Specifically state of the internal power

I must have a controller card from a 8922x But they will be in the storage unit.....

Yes, I have seen the clip for 8920A, but I'm looking for info about the 8920B. /Magnus

Thanks Robert. I have a large number of user setups that I have made over the years. Even POWERON is custom.? Is there a way to save those to PCMIA and then restore them? Or should I temporarily

Boot ROM is U65 on at least one version of the controller card. There is no 8924C CLIP available that I've ever found. Unusually for someone in the UK I've actually owned and repaired a 8924C (more

A "8920" CLIP is in our files section inside the "HP-8920A and HP8920B related" folder which is a big one and a real goldmine holding 14 files which comprise about 60 megabytes of material:?

there should be a set of CLIP's for the 8924 ...look in that package since the processor board is the same. Good point on the boot message ...I think the Boot PROM is socketed so I would try to

By the way, I have found the component level information package for HP8920A. Is there any CLIP for the 8920B available? /Magnus

As I understand, the 8920B has two sets of "ROM", one boot ROM and a set of flash memory for firmware. Correct me if I'm wrong! If my unit doesn't show anything one the screen when I turn it on, it

The CMOS NVRAM which is backed up by the Lithium cell is only used for user set-ups and loaded programs like RF TOOLS. It does not retain any calibration data. Unless you have loaded a program from a

Robert; can you comment on exactly what the lithium battery that is soldered onto the controller backs up? I have an HP8920B that is pretty old and have a new battery to install but the thought of

The following files have been uploaded to the Files area of the [email protected] group. * /Agilent 8935 Series%0ABase Station Test Solutions.pdf.pdf (

The following photos have been uploaded to the Some Images of HP 8935 GSM Version ( /g/HP8924-Family-Spectrum-Analyzers/album?id=272081 ) album of the

The following photos have been uploaded to the Some Images of HP 8935 GSM Version ( /g/HP8924-Family-Spectrum-Analyzers/album?id=272080 ) album of the

Larry McElhiney <lmcelhiney@...> added the album Some Images of HP 8935 GSM Version: Image from the archive of HP Scotland documents.

Thanks for info Juha! Yes, I have seen that thread at EEVblog. /Magnus

The typical repair requires replacement of one or two of the small capacitors on the small vertical boards. ?I believe that this is documented in the files section of this and the old group. If I

What? All of it ? . (Although that said, I'm pretty sure there is a repair/maintenance manual on line)

@Magnus Petersson Have you read this interesting thread at EEVblog about Steve (VE7FM) that repairs a 8920B with boot problem? https://www.eevblog.com/forum/repair/hp-8920b-service-monitor-repair/ You