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Upgraded from analog to a DMM for 1988 Data East Secret Service

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Cenk

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Nov 17, 2012, 10:55:01 PM11/17/12
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My question is: The new Craftsman DMM I purchased is giving me odd diode
reading using the pinout diagrams for my particular diodes and
transistors. Do I have to desolder these diodes and transistors I've
isolated as a likely cause for blowing a fuse on my power board and test
them, or should I be able to test while they are in circuit and on coils
underneath the playfield? Thank you.

Cenk


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Cenk
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railbender

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Nov 17, 2012, 11:42:12 PM11/17/12
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On Saturday, November 17, 2012 8:56:03 PM UTC-7, Cenk wrote:
> My question is: The new Craftsman DMM I purchased is giving me odd diode
>
> reading using the pinout diagrams for my particular diodes and
>
> transistors. Do I have to desolder these diodes and transistors I've
>
> isolated as a likely cause for blowing a fuse on my power board and test
>
> them, or should I be able to test while they are in circuit and on coils
>
> underneath the playfield? Thank you.

I find a lot of these components will fool you when you test in circuit. I usually just clip out the diode, test it to see if I found the problem and then replace either way.

If I don't have a spare, I unsolder 1 side and test it.

That is my $.02

Kenny
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