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Thread: MEP-802A and MEP-803A Wire diagrams

  1. #1
    4 Star General Guyfang's Avatar
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    Default MEP-802A and MEP-803A Wire diagrams

    Morning sleepy heads!

    I am working on, (if I don't go insane first) improving the wire diagrams for the MEP-802A and Mep-803A generators. Sadly, I don't have one, to run out to and look at, when I have a stupid question. I have already found one mistake. The manuals have crappy wire diagrams. The form is good, but the quality is crappy. Soooooooooo, I figured I might be able to improve things.

    I need someone to look, the next time they stick their nose into the control panel, at the ground points. The is a ground point on the control panel door, with a couple wires on it. I need to know the wire numbers.

    I also need the wire numbers on the Control Panel Ground Point. It's in the back of the control panel box. There may also be another ground point there. I KNOW there is one for the A1, volt regulator, where the coax shields for two wires 156A and 157B are grounded. I THINK there are several other wires grounded there, but am not sure.

    So would one of you big strong men take a gander for me? I may have other requests, but am on the verge of losing my mind doing this. So we will take it a step at a time.

    Take care and have a wonderful day!! In any case better then the rain and snow we have had of late. I hate winter!

    Guy

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    If my unit ever had numbers they are all gone except a #3 band on the signal terminal of the temperature gauge (M6).

    MEP-803A

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    4 Star General Guyfang's Avatar
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    I have seen that before! For some reason, the wire number faded away. I was looking for a short, and about went crazy. This was in 2004? I was using an old, old, old schematic. There were a number of mistakes. I went in search of another set, and then copied wire positions and wire numbers. It worked, but I was grumpy forever.

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    These are not faded away. The number bands are just not there except that one.
    MEP-803A

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    4 Star General Guyfang's Avatar
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    Now that's something I haven't ever seen. Makes for fun, if you need to chase wires.

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    On my 802 there two wires on the ground post on the control panel door.
    They appear to be labelled: 100AW20 & 100L20

    The ground port to the right of the A1 Regulator has two wires on it.
    The one that is the ground for the shield does not appear to be marked. It's a small white wire with a black stripe on it.
    The second wire on the post appears to be marked: 100AF20
    Last edited by kloppk; 11-16-2017 at 12:44.

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    Guyfang (11-16-2017)

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    MEP-803A reset 2012: Cover 100L20, 100AW20. Back panel:100AF20 and another unnumbered wire that appears to be tied into VR terminals 1 and 2. Cover 100L20.jpgPanel 100AF20.jpgPanel Crimped to VR1,2.jpg100AW20 Cover.jpg

    MEP-802A reset 2008: Cover 100L20, could not read # on companion wire. Panel 100AF20 and unnumbered as above.
    Last edited by Zed254; 11-16-2017 at 12:45.

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    Guyfang (11-16-2017)

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    If you have any remaining gaps I'll be happy to look over the units I have when I get home in December.
    Chris Medico
    MEP-003a (sold), MEP-803a, MEP-802a, & MEP-831a

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    Guyfang (11-16-2017)

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    Guy perhaps I can help. I have the wiring diagrams on 11x17 and 17x24 printed size paper, very easy to read. In my case i grew tired of playing with the screened ones riveted onto the sets respective doors [802a/803a/and 804b i speak of.. I drilled out the rivets then went to a photo shop and had the door mounted ones reversed negatives made and onto paper so i didn't have to keep lugging around the sharp edged door mounted schematics. this effort was not terribly expensive but did and does save me a lot of time bending over or sitting on the ground trying to read what i want, then getting up and tracing or finding the wire path, where with the schematic in hand i just use the point to point location to verify wiring and continuity for whatever i am searching for.. my point ? i will be pleased to go back down to the local Kinkos and have a copy made and send to you of whatever ones you want if at all.. as best i recall it averaged out near $5.00 a sheet and i forget the price i paid for the photo shop to reverse the drawings.. Also if you want i will go and review the GROUND points on my units and confirm or as you might want .. thanx mac/mc Oh and certainly this applies to any of who might need or want the schematic in paper form.. mm

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    What Guy and myself are doing is to make readable electronic copies of the wiring diagrams and wire lists for maintenance and repair purposes. Having a printed copy is absolutely handy. What we want to end up with is a nice clean set of electronic files to go with the TMs.
    Chris Medico
    MEP-003a (sold), MEP-803a, MEP-802a, & MEP-831a

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    Guyfang (11-16-2017), SCSG-G4 (11-28-2017)

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