Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
i soldered the components back on the board and tested it, and the treadmill now works. i just wish i would've realized that the (+) and (-) signs on the U15A60 are labeled backwards. then i could have ordered locally instead of from china and had this thing fixed weeks ago. (on my original diode, the (+) is actually the cathode and the (-) is actually the cathode)
i hope this thread helps someone fix their treadmill circuit board. my advice would be to start by testing/replacing the components screwed to...
theflyingaj
Member
Last Activity: 12-09-2018, 08:34 AM
Joined: 11-04-2018
Location: st cloud mn
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
stuff was so confusing when i started, now it's seeming stupid simple. thanks for posting pete. the old diode obviously was soldered with it's (+) pin to the 'K' and it's (-) pin to the 'A'. i already got refunded from ebay in china because i thought they sent me the wrong part. now i wish i would have just ordered locally weeks ago. ugh. i'm not going to solder it tonight, but i'll post an update when i get it soldered and all back together and give it the next live test to see if the treadmill belt motor...Leave a comment:
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
ok, i admit i am a newbie to troubleshooting circuits. i did not realize that 'K' is the standard symbol for cathode as 'C' is reserved for the collector of a transistor. now at least that makes sense.
i'm not certain what you're asking, but i'm guessing you're asking for the part number of the underlying circuit board. that is included below:
JHT.CO.
2003.06.05
PCB230D003H
if you're asking for something else, let me know what it is and i'll post the information....Leave a comment:
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
here is a picture of the back of the circuit board:
[url]http://oi68.tinypic.com/28i5cns.jpg[/url]
it looks like the "A" is connected to "MTR1 RED" and "K" is connected to "MTR2 BLACK" which are the two power leads to the treadmill belt motor that is not working. which one should be the anode and which one should be the cathode?
is it standard for "K" to stand for cathode?
here are the two pieces next to the circuit board....Leave a comment:
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
both the old and new rectifiers have continuity between the left pin and the tab. using a diode tester, the old one tests open circuit between the pins in both directions. the new one tests 0.438v with the red lead on the right pin and black on the left pin.
this is the current condition of my board:
[url]http://oi67.tinypic.com/igxj5v.jpg[/url]
(i had to make a modification to the diode rectifier bridge on the far left as it had a different mounting style.)Re: Sourcing Diode/Equivalent:...Leave a comment:
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
on the new part, there is continuity between the left pin and the tab.Leave a comment:
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
yes, that is my board, only my board has one large cap instead of two.Leave a comment:
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
so i purchased this item on ebay as earlier suggested:
[url]https://www.ebay.com/itm/5pcs-New-U15A60-Fast-RECTIFIERS-Mospec-/182164953269?[/url]
turns out that the item that arrived was reverse polarity than the one pictured. all that time waiting for the shipping from china and they sent me the wrong one.
[url]http://oi64.tinypic.com/f50tvr.jpg[/url]Re: Sourcing Diode/Equivalent: MOSPE...4953269?[/url]...Leave a comment:
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
i've looked at that data sheet already and saw that china listing on ebay, trouble is that i don't want to wait a month to get one from china. i was hoping to buy an equivalent one from the united states, but can't verify one with the right polarity so i can install it directly to the heat sink plate without modifications.
i assume the suffix on my piece would be U15A60-R
(it seems odd that in the data sheet the anode connects to the heat sink screw which...Last edited by theflyingaj; 11-04-2018, 11:28 PM.Leave a comment:
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Re: Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
the + and - are labeled on the picture, problem is that the ones i find online are backwards, (- on left, + on right) and i cannot flip the diode around due to the heat sink plate on the back. i am trying to order one from the united states instead of waiting a month to get one from china....Leave a comment:
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Sourcing Diode/Equivalent: MOSPEC U15A60 (anode on left)
i am a newbie troubleshooting a motor control circuit board (PCB230D002F) for a treadmill. symptom was that the treadmill belt would not run. i have been replacing components that tested bad on the heat sink panel.
(the 90v/4 hp dc motor that runs the treadmill belt tested good.)
items tested bad and replaced:
bridge rectifier:
original: MP3510L (failed/short circuit between pins)
replaced with: MP3510 (with modified heat sync mount and jumper wires, i couldn't find a compatible one in the same configuration)
mosfet:
original:... -
Re: New Members - please post your introductions here
Hello from the chilly midwest. I found this forum recommended from another forum. I'm new to troubleshooting icb's and am glad to have found you guys!Leave a comment:
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