| Electronics > Repair |
| [SOLVED] HP 34401a - Error 612, 613, 615, 617, 618, 619, 621 |
| << < (7/22) > >> |
| robjpiel:
The two upper Ohm ranges are working now too, with me holding that substitute decade resistor in place of R122 it is surprisingly stable even with my shaky connection. Thank you for the info. If it does not stabilize and pass calibration I will definitely look into that. You guys have been a big help |
| Samogon:
R122 made my day. Another 34401A is back to work. |
| robjpiel:
Just be sure to run through all the performance verification steps after. Mine was out of tolerance across several ranges. I just recalibrated all of them and this thing is working great. |
| Samogon:
Sure it will be calibrated. |
| Satbeginner:
Hi all, This thread now seems to be a 34401A repair source, so sorry for me joining as well: I acquired a 34401A that has the following errors: 612,613,615,617,618,619 and 621. Both DCV and ACV readings seem to be OK. Based on the information here, I did some checks and it seems that the second half of u201 (b) has died. The 7V on r201 and/or r202 when changing ranges is still there, so I ordered some ad706's. Will keep you posted, in saludo, Satbeginner (Leo) |
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