I know this is an old thread but might someone be able to help? I have a Mastech ms8229 and for some reason it is acting up so weird. I have no idea what I did to get this but it want to measure ohms in the volts position. It won't measure the ohm or even notice any volts(testing with a aaa to not damage it). I opened it and looked carefully around and didn't see any broken parts or anything missing. I don't care about the meter but just want to know what it up with it. I died little over a year ago and I got much nicer ones after it did.
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Mastech ms8229
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Re: Protek 6300 "5 in 1" DMM
Originally posted by Kawooa View PostI have no idea what I did to get this but it want to measure ohms in the volts position.
You will have to take it apart and post some clear focused pictures.
edit: If the rotary switch were on resistance, it should display overload instead of 0.000 with no probes attached. If the rotary switch were on volts, it should show 0.000 with no probes attached, but with V instead of the ohm symbol.Last edited by retiredcaps; 04-14-2015, 05:55 PM.--- begin sig file ---
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Re: Mastech ms8229
I found a picture of the MS8229 front pcb at
http://fisch.suroot.com/mastechms822...ms8229_004.jpg
I circled what I believe is dirt/debris that may interfere with the proper operation of the multimeter? You can clean it with isopropyl alcohol.--- begin sig file ---
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Re: Mastech ms8229
I opened it for only the 20th time today and cleaned the rotor switch with a old tooth brush and some rubbing alcohol and it still want to measure ohms in the volts position. I don't know what is causing it only that it is annoying. It wants to when I hit the select button switch between all the ohms functions such as ohms, diode, continuity, caps(nf). Only problem is that it doesn't measure only displays it as though it was trying.Make sense? What fun is there in making sense?- Discord
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Re: Mastech ms8229
Originally posted by retiredcaps View PostI found a picture of the MS8229 front pcb at
http://fisch.suroot.com/mastechms822...ms8229_004.jpg
I circled what I believe is dirt/debris that may interfere with the proper operation of the multimeter? You can clean it with isopropyl alcohol.Make sense? What fun is there in making sense?- Discord
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Re: Mastech ms8229
I grabbed my extremely bright flashlight and looked at most solder joints if not all and didn't see anything that looked off. I grabbed my tooth brush again and cleaned the entire board. Going to try in a couple minutes after it dries.Make sense? What fun is there in making sense?- Discord
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Re: Mastech ms8229
Closer! But I think some of those little contacts in the rotor switch are off. I now have volts on volts but all the other ranges are not the right things. Volts now is the only correct position but before and amps were the only ones off. I need a picture of someone's switch that isn't messed up so I can't see why mine if off and fix it.Make sense? What fun is there in making sense?- Discord
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Re: Mastech ms8229
Originally posted by Kawooa View PostI need a picture of someone's switch that isn't messed up so I can't see why mine if off and fix it.Last edited by retiredcaps; 04-15-2015, 12:03 AM.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
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Re: Mastech ms8229
I adjusted the little contacts but now it is back to how it was before. I must have moved one by mistake which gave me volts but no other range. I still don't have volts and amps as it wants to measure amps from the volts terminal. This is so weird.Make sense? What fun is there in making sense?- Discord
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Re: Mastech ms8229
Originally posted by Kawooa View PostI still don't have volts and amps as it wants to measure amps from the volts terminal.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
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Please do not post inline and offsite as they slow down the loading of pages.
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Re: Mastech ms8229
Try interchaning the bottom 4 contacts with the top 4 and see if the volts and amps functionality work? The reason for moving them around is perhaps one of the contacts is bad or malformed? If moving them around results in different behavior that tells us something too.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
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