Вставка
- Опубліковано 18 жов 2024
- episode 277
complete repair
1 10 1189-1745-ND
35PX1000MEFC10X20 CAP ALUM 1000UF 20% 35V RADIAL 0 0.54500 $5.45
2 1 1189-2323-ND
50YXJ33M5X11 CAP ALUM 33UF 20% 50V RADIAL 0 0.31000 $0.31
3 3 493-13472-1-ND
UVZ1H470MED1TD CAP ALUM 47UF 20% 50V RADIAL 0 0.31000 $0.93
4 4 493-1911-ND
UPW1H471MHD CAP ALUM 470UF 20% 50V RADIAL 0 0.79000 $3.16
5 1 1189-1964-ND
400HXG220MEFCSN25X35 CAP ALUM 220UF 20% 400V SNAP 0 4.10000 $4.10
6 1 1189-2852-ND
400HXG100MEFCSN22X25 CAP ALUM 100UF 20% 400V SNAP 0 3.36000 $3.36
Nice Job ! I just did the same fixing but mine HP8920A was still working well... just that electrolitic bad smell, I imediately recognized there was a problem. Technician Nose is one of the most usefull "instrument" that cannot miss in a good Laboratory :)
Now i'm waiting for the spare parts.
Good repair I have a Marconi 2955 and a stabilock test set.
Marconi stuff is great
Glad it worked out...my IFR is giving me signal generator issues...sigh, hope it's an easy fix like yours was.
which IFR do you have 1200? Signal generator trouble shooting should be ok. better than a bad spectrum analyzer.
I have a 1500 that I got back in the mid-90's. Long story about the analog attenuator that I had IFR replace with the digital one ($$$$); had some strange goings on recently doing VHF/UHF SINAD tests that I think are heat related...just too lazy to dig into it (I do have the complete service manual) since I can do the same thing with a SINNADER 3 and the RS RF generators I have.
that's a fancy one. I take back what I said about a easy fix......
I see this repair in the future for my HP8920B. Do you have any suggestions for getting those parts out without tearing up the foil?
Get a good solder sucker like a Hakko FR300
I wonder what the life expectancy of the smaller capacitors are. I mean, the smaller size must mean they made a compromise with some other factor...
the display on mine started flickering and flashing. all it was was the internal intensity control needed cleaning.
Nice video! Do you know where can I find the schematics for the HP8920A power supply? It looks a lot alike HP8921A. Mine has some resistors and transistors blown and I can't see the markings on them. Thanks!
www.keysight.com/en/pd-1000002342%3Aepsg%3Apro-pn-8920A/rf-communications-test-set?pm=PL&nid=-536900808.536880153&cc=US&lc=eng
you want the component level document
@@IMSAIGuy Thank you for your quick reply. I've downloaded the Component level document, but it's missing the A9 Power supply chapter, which is exactly what I need. It has the A10 Power supply regulator, but my burn is on A9 power supply. Is there another place where I can find someting about power supply components? Thanks!
I did some looking. The power supply was desingned and bought from a 3rd party so HP did not include any component level info on the A9.
@@davidwwjd The power supply part number is 08920-61815
I've seen them on eBay before but not now. don't remember the price.
@@IMSAIGuy I've searched for this part number a lot but I couldn't find a single schematic about it. I found some pictures and I hoped I will be able to read the color bars from the pictures but they were to blurry and while searching for pictures or diagrams I reached your video. Thank you.
it had missing traces?
What was wrong with the power supply? I mine won't turn on.
ua-cam.com/video/YadG-NTCy_c/v-deo.html
My HP8921A at RF Geneator....weak signal ini output tha doesn't strong to trigger spectrum analyzer do you know which module is fail ? if module RF Gererator synthesizer fail, must be replace new module or it can be repaired ? Thank's
try to output on the RF in/out connector (N-type) then the duplexer output (BNC). if both are dead then the RF module is probably bad. you cannot find schematics for the 8921 but you can find component level documentation for the 8920 which should be the same. It might me hard to work on without an extender card though.
oh, and make sure you don't have any AM FM modulation being applied. you need full modulation to get power out
Muito bom seus vídeos faz um vídeo de ajuste de duplex com Hp 8921a
HP8920A Spectrum Analyzer Self Cal Failed. Error=242 ?
yo tengo un error parecido, Voltmeter calibration failure error = 242...