Re: troubleshooting this board
HI budm,
Just took pictures of the tags on the motor....
MarkM
Member
Last Activity: 12-03-2014, 12:52 AM
Joined: 08-04-2013
Location: NJ
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Re: troubleshooting this board
Hi budm,
I can't find much info on these motors, they're 120vac. I attached images of what they look like, the motors are for boilers.
In hindsight what I thought was a relay appears to be a capacitor (image attached)....Leave a comment:
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troubleshooting this board
Hello everyone,
First off, sorry if this is the wrong section to post this.
I'm trying to troubleshoot these boards that control blower motors.
Two of them power the motor fine, but doesn't kick it into high speed; the other one I found a thermistor (SCK 203) blown and arc against a relay and a fuse blown. Replaced all three components with used ones and the fuse blown again. Looking for help trying to figure out what's wrong. Images attached of the board with bad fuse.
Thanks,
Mark... -
Re: LG 42PC1D Faulty YSUS Diode
Hi Nipz
I just got done working on a board very similar to yours last week. (Also replaced 9 3300uf 10v capacitors on the power supply)
Check positive lead on pin 1 negative lead on pin 3 (my reading was .392)
Check positive lead on pin 2 negative lead on pin 3 (my reading was .392)
Readings should be higher if taken off the board
Check positive lead on pin 3 negative lead on pin 1 (should be OL)
Check positive lead on pin 3 negative lead on pin 1 (should be OL)
Diode D21 (the...Leave a comment:
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Re: mosfet or transistor?
Thanks budm,
Just so I understand, where is the ground label on the board? Is it the dark green mask?Leave a comment:
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Re: mosfet or transistor?
Hey guys,
cashkennedy,
Both sides of the anodes traces are continuous to ground. Ohm reading 000.0
The diode is off the board
budm,
I attached two images, one marked up and one not. Yup diode1 and diode2 are the same shown in the picture.
I'm just trying to rule out there's not any other problems before I install the new diode and ipm
thanks guys...Leave a comment:
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Re: mosfet or transistor?
Thanks, I went ahead and ordered the diode (and one spare
)
Please correct me if I'm wrong.. Voltage flows into the anodes and out of the cathode and blocks it from flowing back(like a check valve)? The two anode spots on the board have continuity to ground. Could something else be bad as well, that trace to the anode spots causing it to ground? Or does it sound right to have anodes as ground?
ThanksLeave a comment:
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Re: mosfet or transistor?
sorry capkid,
for diode 2
where i have
Pin 2 (or the tab) - Pos lead, Pin 3 - Neg lead. Expected Result: Open or "OL" 0.000
it is
Pin 2 (or the tab) - Pos lead, Pin 3 - Neg lead. Expected Result: Open or "OL"
reading is OL
would you still consider this diode bad? (since I'm getting .392)Leave a comment:
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Re: mosfet or transistor?
Thanks capkid,
Here's my results of my test, there are two of these diodes on the board..
Test 1: doide1
Pin 1 - Pos lead, Pin 2 (or the tab) - Neg lead. Expected Result: Reading of around 0.5V .046
Pin 1 - Neg lead, Pin 2 (or the tab) - Pos lead. Expected Result: Open or "OL" .OL
Test 2:
Pin 2 (or the tab) - Pos lead, Pin 3 - Neg lead. Expected Result: Open or "OL" 0.000
Pin 2 (or the tab) - Neg lead, Pin 3 - Pos lead. Expected Result: Reading of around 0.5V 0.000
...Leave a comment:
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mosfet or transistor?
Hi guys,
I'm wondering if this is a mosfet or transistor, and the proper way to test it.
Thanks,
Mark... -
Re: 42pc3dv ysus question
Thanks for the reply capkid,
The clip is completely off, not sure if I can just place the ribbon back in then sit the clip on it then hot glue it down, thinking that route if I cant get this connector.Leave a comment:
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42pc3dv ysus question
Hi everyone,
I'm working on a 42pc3dv - no picture has sound. Bad fuse on ysus board( short to ground). I did the test on the ipm that I found online and it tested as bad. I have a few questions hopefully someone can help me out with.
After removing the ipm, I tested at the rings on the board where the ipm sits, a lot of the rings have continuity to ground( I attached an image). Is this right?
There's a resistor on the board R36, one of the leads has continuity to ground, does this sound right?
The sideways cap has a slight mark on top of it... -
Re: lg 42pc3d has sound no picture and no backlight
Hi Cadillacman,
When you were testing the fuses, was one shorted to ground? That's what I ran into on the ysus board, just ordered the hybrid.Leave a comment:
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