Re: Help with Motor Control Board
So do I need to replace TC1410 now?
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Re: Help with Motor Control Board
The Gate drive stuck high so the MOSFET is fully on when you shorted out the Gate drive IC TC1410, do not run it or you burn out the motor.
So it proves that the drive circuit is OK, you just do not have the drive signal to drive the MOSFET.Last edited by budm; 01-12-2015, 05:08 PM.Leave a comment:
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Re: Help with Motor Control Board
Selldoor in post #145 said it was so that's what I got. However I have a new problem now. I was testing to make sure I still had the voltage from that small 8 pin mosfet and I must have shorted it or something because all of a sudden the treadmill motor just started at full speed. Now it won't shut off except by turning power off, even when pulling out the safety switch.Leave a comment:
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Re: Help with Motor Control Board
So the old two black resistors are both 1000 Ohms for sure?
"Ok I just got the 2 large resistors, got 10w 1000ohm ceramic. Maybe not large enough cause they measure .831 and the original measure 1.442 in diode mode" You are measuring the resistors in Diode mode?Leave a comment:
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Re: Help with Motor Control Board
Ok I just got the 2 large resistors, got 10w 1000ohm ceramic. Maybe not large enough cause they measure .831 and the original measure 1.442 in diode mode. I also replaced D10 and now it measures .609 but if I reverse the leads it measures 1.031. Motor still won't turn on.Leave a comment:
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Re: Help with Motor Control Board
On my way to store to get that diode and the 2 large wound resistors.Leave a comment:
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Re: Help with Motor Control Board
I removed D10 and it still shows continuity and reads .5 ohms.Leave a comment:
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Re: Help with Motor Control Board
Here is another picture of where D10 goes. Not that great but I don't have color printer.Attached FilesLeave a comment:
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Re: Help with Motor Control Board
By looking at the board the only thing it is connected to is the zener in DZ1 and the one leg of the relay switch.Leave a comment:
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Re: Help with Motor Control Board
So we do have power to run this MOSFET driver IC.
D10: There may be another component connected in parallel with D10, you need to lift one leg or remove it off the board for proper test. Pictures and location on the board?Leave a comment:
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Re: Help with Motor Control Board
I also just tested the diodes D9 D10 D14 D15 D16 which all look like they are identical. I get 0 reading in all but D10 which gives me an .5 ohm reading and it has continuity where the others don't. Does that sound right?
It looks like D10 connect to DZ1 and then to the relay.Last edited by Crrose; 01-12-2015, 11:45 AM.Leave a comment:
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Re: Help with Motor Control Board
Ok the zener and that mossfet both tested at 12.1VDCLeave a comment:
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Re: Help with Motor Control Board
No that is maybe a little shadowing but more of one of the solder joints to that resistor. I'll reassemble the board again and test that Zener.Leave a comment:
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Re: Help with Motor Control Board
There is Zener diode connected to VDD pin and Ground of that MOSFET driver IC, check to see what DC Voltage you get, again this hot circuit so do not touch anything with your hands or body.Leave a comment:
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I have a motor control board I am trying to repair. I've been told the motor is fine, but the control board will only make the motor go one direction but not the other. Power comes in through a linear transformer and then a rectifier bridge and then filter caps. No schematics for the board. Relays on the board are 24V so I started by setting my bench PSU to 24V and injecting voltage. There are several LEDs. All but one LED lights up. There are test points labelled +15V, 0V and -15V. When checking voltage potential between +15V and 0V, I get a perfect 15V. For -15V to 0V, my meter shows approximately... -
Hi,
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I hope someone can help!
Thanks.
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