Hi List, Sven Schnelle <[email protected]> writes:
> recently i acquired an old Advantest R6581 Multimeter. When i received > the unit, it didn't show anything on the display. It turned out that > the backup battery leaked, and some traces on the PCB where > interrupted. After fixing them, > it showed the R6581 welcome banner, and after that "RUNNING SELF > TEST". Now the self test fails with 'Internal Zero error'. > > I'm not sure whether that's because it lost all of its calibration > data, or if that's a real error on the Analog PCB. Does anyone on this > list have some experience with those units, or a User > Manual/Schematic? > > It would be really sad to have such a nice 8 1/2 digit multimeter in a > non-working state... After spending some hours following traces and swapping parts, it turned out that a OP07D(U107) and a JFET (2N4393, Q201) was the culprit. Now it looks like i have a fine 8 1/2 Digit Multimeter. I just need to find a lab which can calibrate it. :-) Regards Sven _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
