| Electronics > Repair |
| HP 3458A - Fails Slave Test - Convergence |
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| Ade911:
Hi Frank, Thanks for this advice, baby steps moving forward. Ill order the parts , refresh the software and then see what happens next. Updates to continue :) |
| Dr. Frank:
for completeness, here's a picture of my board with upgraded SRAM and updated nVRAMs. EPROM in this picture is still V8 |
| Ade911:
Hello Frank, So sorry for the delayed response, you will not believe it but out phone line was hit by lightning, yes really did blow up a powerline and router, sparks, exploded chips the works but the house didn't catch fire thank goodness. Anyhow, EPROM purchased from a company in the UK on E-Bay , they were new so I have a few spare, tried down loading ver 9 from TiNs website but the link is dead. Fortunately martinr33 had a copy that I managed to download which seems to work fine [thank you martinr33] - output_rev9.bin - CORRECTED 03FCB1D6.bin. REV now states 9.2 so I believe this is correct. I have also purchased a NI GPIB to USB convertor so can interrogate the unit via GPIB if required. I didn't add the extra memory yet just in case the unit is really dead so I want to get it going first. Error codes 202 Hardware - Slave test convergence 101 Calibration Required - SCAL Upon power up I did also get the A/D can not read error but after trying a reset command it disappeared. Will now return to the A/D paper you recommended I read, slowly going through it but its hard going. Not sure if there is anything else I can check at present. Many thanks, Ade. |
| Ade911:
Hello Frank, Not sure if you can answer ; if i have access to another unit , would board swapping cause issues with the other unit, not ideal but run out of ideas before asking for a quote from the OEM. Im stuck, I don't seem to be able to find out anywhere where it states the system will still sample even if U180 is dead. It will sample if TRAM is activated , no input and DCV dropped to mV but im not sure why this happens but not in volt range. OVLD signal on U228 is working fine. |
| Kleinstein:
Board swaps allways come with some danger. At least swapping the digital boad should be relatively safe - with mainly the ESD and similar handling risk. One may even get away with just crossing the fiber optic links and still keep the boards in place. Before other swaps one should really make sure the supply is stable and safe - a bad supply would be a stupid mistake to damage a good board. |
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