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Forums13
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Most Online117 Jan 16th, 2020
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#1678 - 08/18/11 11:57 PM
Re: Strange Epoch II Problem
[Re: Scott Davidson]
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Joined: May 2011
Posts: 487
E-man
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addict
Joined: May 2011
Posts: 487
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Thanks Scott,
No, we're over here on the east coast. I've been up there with him and he's changed all of the power supplies in the controller. I don't think he's actually pulled on the wires, that's worth trying.
Last edited by E-man; 08/18/11 11:57 PM.
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#1679 - 08/19/11 03:32 AM
Re: Strange Epoch II Problem
[Re: E-man]
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Joined: Oct 2009
Posts: 404
Scott Davidson
troubleshooter1
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troubleshooter1
Joined: Oct 2009
Posts: 404
california
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if all the power supplies have been changed, then it probably a stretch, but better then no idea at all, maybe some wiring is loose. I was thinking about this today, Is he sure the mpt is rebooting, or is the dpower output that picks the PWR relay just dropping out? I dont work on these very often, but i believe that when the one i was working on failed, it would reboot the mpt and go back into service with no other interaction from us. if the mpt is actually rebooting, then it has to be something with the power supply, did he replace the power supply feeding mpt with a unit that has the same amperage rating? I have seen power supplies that have been replaced with lower amp rating that could not handle the load and be on the hairy edge which could cause trouble. any way something to think about. tell your buddy good luck, i feel for him, i have been on a couple of these jobs for more then a few days at a time, what a pain.
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#1704 - 08/24/11 10:43 PM
Re: Strange Epoch II Problem
[Re: fateinc2005]
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Joined: May 2011
Posts: 487
E-man
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Joined: May 2011
Posts: 487
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Are the power supplies getting replaced like for like? The oem ones I think are 28 amps The cheap replacements come at like 7 or 8 amps We found this too be a problem when a car would go down and switch dispatching roles .The car with generic power supply would reset similar to your issue. The current output just wasn't enough to handle the load . Is the car using fiber optics on the pulse wheel ? Yes, it's using fiber optics on the pulse wheel. He replaced the fiber and the heads not all that long ago for a different problem.
Last edited by E-man; 08/24/11 10:43 PM.
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#1705 - 08/24/11 10:47 PM
Re: Strange Epoch II Problem
[Re: itsallgood]
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Joined: May 2011
Posts: 487
E-man
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Joined: May 2011
Posts: 487
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MPT board monitors two separate 5v supplies (and 24v as well) . Check them at the board, not at the power supply. Set to 5.05 at board. Check the first one at TP1 and TP2 , and check the second one across the red varistor located near the top right corner of MPT board. Second one comes in via ribbon cable , so there is no other test point at the board. Also keep in mind voltage monitoring circuit sometimes goes bad on board itself resulting in unjustified shutdowns of microprocessor. All voltages were checked at the board and set with Fluke 87s, I'm not sure of the exact voltage he set it at, but he had a very seasoned Westinghouse Adjuster spend about 3 days on it up there with him and they replaced all the boards again. It's been running (we think), For some reason I think it's a wiring and/or connection problem.
Last edited by E-man; 08/24/11 10:48 PM.
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