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Electronics => Repair => Topic started by: g8bnr on May 05, 2015, 08:13:04 am

Title: MY-64 Digital Multimeter fault
Post by: g8bnr on May 05, 2015, 08:13:04 am

My MY-64 doesn't zero. It reads around 2.3 on all ranges. I suspect that the ICL7106 has been damaged, it is not a packaged chip but is a plastic blob on the board.

Am I correct in my analysis, if so, is there anything that can be done? Or is it a bin job?

Dick G8BNR

Title: Re: MY-64 Digital Multimeter fault
Post by: wraper on May 05, 2015, 08:24:55 am

Are there pads for the IC in package? If yes, you could just remove that blob and solder packaged IC.

Title: Re: MY-64 Digital Multimeter fault
Post by: g8bnr on May 05, 2015, 04:59:21 pm

The answer is, sadly, no, unless the IC package is about 0.5" square!! The only ICL 7106 chip that I have seen is a large DIL package!

Dick G8BNR

Title: Re: MY-64 Digital Multimeter fault
Post by: wraper on May 05, 2015, 05:01:51 pm

Quote from: g8bnr on May 05, 2015, 04:59:21 pm

The answer is, sadly, no, unless the IC package is about 0.5" square!! The only ICL 7106 chip that I have seen is a large DIL package!

Dick G8BNR

(http://i.ebayimg.com/00/s/NTE1WDU5MA==/z/2GcAAOSw7PBTnaDt/$_35.JPG)

Title: Re: MY-64 Digital Multimeter fault
Post by: retiredcaps on May 06, 2015, 05:57:02 am

Quote from: g8bnr on May 05, 2015, 08:13:04 am

My MY-64 doesn't zero. It reads around 2.3 on all ranges.

Do other functions like measuring a 9V battery work?