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 Post subject: Snap-on auto volt meter reads low. Model MT406.
PostPosted: Jan Tue 13, 2009 2:40 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1046
Location: Pinellas Park Fl. U.S.A.
Would anyone have the schematic showing the values of the resistors in a Snap-on MT406 analog auto volt/ohm meter.They sent me a drawing showing the wiring and parts list but said values were not available. Meter reads 10 volts on a charged 12 volt battery. The resistors That are suspect are not coded.

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 Post subject: Re: Snap-on auto volt meter reads low. Model MT406.
PostPosted: Aug Sat 27, 2011 4:21 pm 
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Joined: Aug Sat 27, 2011 4:16 pm
Posts: 1
Do you still need info on the MT406 meter... Also do you have a image of the circuit board or wiring diagram.. I have this meter and had to replace a 10 ohm resistor but the wires for the 9 volt batteries ar missing. Thanks


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 Post subject: Re: Snap-on auto volt meter reads low. Model MT406.
PostPosted: Aug Mon 29, 2011 2:27 am 
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Joined: Apr Tue 12, 2011 3:15 am
Posts: 460
I have schematics for most Snap-On electronic equipment. If either of you need the MT-406 let me know but give me a few days to scare them up.


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 Post subject: Re: Snap-on auto volt meter reads low. Model MT406.
PostPosted: Aug Wed 31, 2011 2:23 am 
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Joined: Oct Sun 18, 2009 5:38 am
Posts: 3289
Location: Tyler, Texas 75707-4212
I have a functioning MT-406 if more detail than a schematic is needed.

Curmudgeon, if either of them need it, and you spend the time to hunt it up, I'd like a copy for files. Only of they need it.

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 Post subject: Re: Snap-on auto volt meter reads low. Model MT406.
PostPosted: Sep Thu 01, 2011 1:25 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1046
Location: Pinellas Park Fl. U.S.A.
Thanks for your offers, but this spring I subbed a pot for the suspect resistor and was able to get it reading accurate, thanks again and a schematic sure would be helpful if this meter ever needs service again.

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