开云体育

Hi Rick, I'm late to this, but to answer your question, the Gonbes GBS-8200 or 8220 converters are a low cost option if you don't mind making a sync separator circuit and putting it in a box. The

Any chance you could copy/paste that list of components you ended up using here? Thanks for the info. Rik WA4BAN

Thanks will try that first!

That is how my E8285A was acting just before it got to the point that nothing at all happened when I pushed the power switch. Replacing all of the electrolytic capacitors and one tantalum capacitor on

Right, ? I would check the 47uF on the "daughter " board first. See attached picture. Rick

I reprogrammed the original factory firmware (rev 6.11) eproms with 14.14. They are all 150us parts. No difference. Also checked for bent pins at the CPU , signal and memory? board connectors. None

Appears to be a switching power supply, with a regulator board mounted above it. It seems the switching power supply is not starting up. Not even the fan runs. _____________ Rik Rasmussen

Hi Rik, I guess the problem will be on the rear most power supply board. Not sure what it is. Rick

My 8935 was working fine. Passes all tests. It was powered up on my bench and suddenly shut down. It will not power up. The GFI is not tripped. If I turn on the power switch the unlock led blinks and

I posed a while back about the 8924C my friend owned who died unexpectedly and I inherited. I fixed the PS but he had several screws and the PS cover missing, handles, trim, etc... I contacted

My 8594E failed the CAL AMP at the 1 kHz step. I aligned using the instructions in the manual, including making up a set of of shorting plugs. I also referred to a great posting at EEVblog Forum with

My programmer verifies the same way. Never got a FW checksum error,? always a non-recoverable fw error. I'll check for bent pins.

Swapping the -120 for a -150 is certainly something I can try. The signaling eprom is the latest I believe 08920-87167 from the HP/Agilent groups io file section

Re: [HP8920/8935 Family] HP 8920A Firmware Upgrade Issue Hello, Wednesday, May 10, 2023, 17:11:31, wgwl wrote: Actually one of the new firmware eproms is a -120 (faster), but I don't think that should

normally the verify process on your programmer should catch that.? The one I usually use does three passes at varying voltages? ...from 4.75 to 5.25 The 8920A had the slower processor so it would be

Actually one of the new firmware eproms is a -120 (faster), but I don't think that should matter. The current FW 9.15 (original HP parts) runs fine and is a mix of AM27C040, TMS27C040 and TCS574000.

The original factory firmware (rev. 6.11) eproms are Toshiba TC574000D-150. I used the same part number eprom to program the newer firmware so that shouldn't be the issue. Thanks for the suggestion,

Just couple of things to check is if you can is to try another brand of eproms and also the speed of the eprom. I’ve failures in equipment if another brand other than the original eprom is used or a

You are probably correct in that the processor board is the issue.? ?The new firmware is hitting? something unused on early versions that is broken. I have never seen a firmware compatibility issue

Sounds irritating. Possibly the eeprom on the controller board is corrupt?