Mep806a where is the mpu?

[kloppk]

2.0 V is in spec. Seems the set is flashing which would indicate the MPU is working.
Sounds like the set is trying to flash the head but I'd expect the voltmeter to read closer to 208 volts. Meter may be wonkey.
Check the AC voltage at the convenience outlet with S1 in START and see if you get something close to 120 VAC.

 

[SandBar]

Checking...

 

[SandBar]

Well that was interesting. 0 volts but had generator running for about 3 minutes and got white smoke from this electronics compartment. Waiting for whatever got hot to cool so I can see what happened

 

[SandBar]

I think the popping unhappy sound and smoke came from this guy

 

[SandBar]

What on earth would cause that fun smoke ?

 

[kloppk]

What you have circled is the contactor. Basically a big relay used to control power to the lugs.
I wouldn't expect any smoke from it.

 

[SandBar]

Hmm, there is a transformer to the right

 

[SandBar]

This transformer looks crispy and it also looks like someone rewired or replaced before I got it (likely hooked up incorrectly). What is his function and how can I find a replacement?

 

[SandBar]

Looking at the schematic , it says Potential Transformer. Why would he die? Can't find a part number

 

[SandBar]

Per whoever made these labels I can see 1 and 2 are reversed, the cause ?

 

[kloppk]

That's the transformer that powers the AC voltage regulator.
Can you post a picture of the A1 Voltage Regulator?

 

[SandBar]

Yes sir

 

[kloppk]

TY for the picture. Just wanted to verify if the right transformer and VR were in the set.
My money is on the VR is bad which in turn caused the T1 transformer to burn up.
Transformer is probably shot as well as the VR.

Luckily I make a replacement VR for your set. Click link in my signature.
If you choose to go with my VR you'll want to disconnect T1. No need to replace T1.

 

[Guyfang]

Kurt,

This could be a case of not all parts being from the same manufacturer.

 

[kloppk]

Kurt,

This could be a case of not all parts being from the same manufacturer.

T1 and VR both look to be TRC

 

[Guyfang]

Dont forget R1 and R16 have to match also.

 

[Guyfang]

Here is the parts list

 

[SandBar]

I feel like someone wired it back up wrong seeing those hand numbered tags on the transformer. Would lead 1 and 2 reversed do that (smoke)?

 

[Guyfang]

No, would not matter. But a bad VR would cause things to happen. Also, if all the parts on that list I posted are not from the same manufacturer, that would cause the problem.