| Electronics > Repair |
| Agilent 34401A Bubble on PCB ... can it be saved ? (SOLVED) |
| << < (20/24) > >> |
| The_Spectrum.A_idiot:
--- Quote from: Dr. Frank on September 24, 2024, 05:04:47 pm ---and the other currents, 5µA and 10µA? Does it now pass the test? That means, DIP 8 is obsolete, and you have used an SOIC / DIP adapter? Or was it an SO package initially? I don't remember.. --- End quote --- Let me solder everything back except the cap and see how it goes. |
| Dr. Frank:
Great! I have to leave for basketball in 20min., so maybe I can't answer your questions later. |
| The_Spectrum.A_idiot:
still Failed. ( I soldered everything back as they were. ) I managed to find on ebay original OP amps. Let's hope this is the case.(changing to an original part) Thank you for your time ! |
| The_Spectrum.A_idiot:
--- Quote from: Dr. Frank on September 24, 2024, 05:04:47 pm ---and the other currents, 5µA and 10µA? Does it now pass the test? That means, DIP 8 is obsolete, and you have used an SOIC / DIP adapter? Or was it an SO package initially? I don't remember.. This type is correct, anyhow --- End quote --- Well I managed to solder it on .. regardless if it was a different package ... pinout was the same so I just made due. |
| Kleinstein:
A damaged capacitor C210 is possible, e.g. due to PCB stress from the bubble. For a test one could try without or with a different low leakage type, possibly also through hole and a slight larger values like 330 pF. C0G capacitors should be reasonable low leakage, also for more normal types. With the flux it is also possible that just re-soldering effects leakage on the PCB. The flux linked should be easy to clean and at least for a first test should even be OK without extra cleaning. Excessive flux that did not got hot may however be a problem and likely needs cleaning. The AD706 should still be available and the photo shows a SO8 foot-print, not a dip. For the wide / narrow version one often can bridge the gap, though this can make PCB cleaning a bit more tricky. |
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