I recently purchased a defective 9578 and have been able to get it working (so far). Everything appears to be responding now through the front panel and the serial port. I wanted to let the meter run for several days to settle in but with the recent postings of Schaffner input filters failing shorted, I went ahead and ordered new replacements for this unit and my other 7061.
The new model is the FN372-2-22 and all pinouts appear to match based on manufacturers datasheets. The only snag that I have run into is a 1Meg resistor soldered across the output of the filter. I looked in the service manual and there is no mention of this part. I know others here have replaced the Schaffner filters and I would like to know if there is any benefit to adding this resistor? Once I get this burned in I will want to go through the calibration procedure as soon as I order some Fischer connectors. I just need to know if I need two of the S104A053 connectors for shorting the front and rear , or can I get away with just one? I have a complete set of cables that came with my 7061, but I will have to make a separate cable for the ratio reference input. Also, I would like to thank Dave Partridge and Mickle T for their detailed repairs that were helpful in diagnosing the several problems I found with this meter. Todd _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.