Aneng dt 9205a dvm

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  • barry wilkins
    Senior Member
    • Aug 2009
    • 172

    #1

    Aneng dt 9205a dvm

    Has anybody got the circuit for this meter ?

    Thanks

    Barry
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30978
    • Albion

    #2
    Re: Aneng dt 9205a dvm

    what chip does it use?
    dtm0660?
    dm1106?

    Comment

    • barry wilkins
      Senior Member
      • Aug 2009
      • 172

      #3
      Re: Aneng dt 9205a dvm

      Hi cant tell what the chip is attached a picture .
      I know this was quite cheap ,bought it from Amazon because I had blown workshop one on some Ferrus power supplies, in fact its not bad just a bit low on all readings,when I compare it with my best meter which is accurate.
      Just would like to increase the counts which will make it bit better.

      If you see my other post ,I found a resistor O/C on the Maxcom ,so got lots of meters now 8 or 9 .
      3 scopes.
      Barry

      Comment

      • barry wilkins
        Senior Member
        • Aug 2009
        • 172

        #4
        Re: Aneng dt 9205a dvm

        dont know what happened with the picture
        Attached Files

        Comment

        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 30978
          • Albion

          #5
          Re: Aneng dt 9205a dvm

          i dont think you can increase the count if it doesnt use one of the chips i listed,
          are either of the 8pin chips a 24c02 eeprom?

          Comment

          • barry wilkins
            Senior Member
            • Aug 2009
            • 172

            #6
            Re: Aneng dt 9205a dvm

            Hi I did find some info on line ,which I did not think was correct . It showed a circuit with 7106 IC.
            I wiil take a look next week.

            Barry

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30978
              • Albion

              #7
              Re: Aneng dt 9205a dvm

              it's not the old icl chip - the tracks dont fit the schematic.
              Attached Files

              Comment

              • barry wilkins
                Senior Member
                • Aug 2009
                • 172

                #8
                Re: Aneng dt 9205a dvm

                It might be the new chip which has 44 pins
                R34 is connected to pin 39 (100K) reducing by padding this with 10M has brought up the reading .Its slightly high now .
                One of those tiny pots would be nice ,but have never found them anywhere.
                I have got some SM 10M resistors left over from a scope repair ,so I will fit one of them.

                Barry

                Comment

                • stj
                  Great Sage 齊天大聖
                  • Dec 2009
                  • 30978
                  • Albion

                  #9
                  Re: Aneng dt 9205a dvm

                  i have those pots - they come from ali express.
                  https://www.aliexpress.com/item/32843902104.html

                  if your in a pinch, you can find them on cd/dvd laser assembly's

                  Comment

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