This is the reverse-engineered copy of the MC2100, not sure if it will help.
Max.

The attached photo is an APS354B treadmill motor controler board that looks similar to the mc2100. Was wondering if the wire colors are the same and if it can be used with the signal generator like the mc2100?

 

The attached photo is an APS354B treadmill motor controler board that looks similar to the mc2100. Was wondering if the wire colors are the same and if it can be used with the signal generator like the mc2100?

Yes, IIRC it uses the same type of signal, into the same colours in to HD6.

 

Yes, IIRC it uses the same type of signal, into the same colours in to HD6.

Thanks Max-HeadRoom appreciate your response. I am sure I will have more questions once I purchase a signal generator. Since I am not a tech person I reaily appreciate a site like this with lots of great reading and very valuable information. Thanks again.

 

Yes, IIRC it uses the same type of signal, into the same colours in to HD6.

The connector on this board in the picture has only 7 connections but there are 3 behind it that connects to the selector board that controls the speed and the incline motor and five to the left that connect to the computer board. Using the black, red and blue in the 7 connections do not work with the signal generator that I was using with my mc2100 as a matter of fact I will need to replace my signal generator. I think I may have fried it. (Nothing ventured nothing gained) lol. Would you have a hookup for this board?

 

I do not have it now for that board, but trace the pin that goes to the 4 pin of one of the opto inputs and that will be the PWM and the ground or common usually the BLK wire.

 

I do not have it now for that board, but trace the pin that goes to the 4 pin of one of the opto inputs and that will be the PWM and the ground or common usually the BLK wire.

Thanks MaxHeadRoom but your suggestion is beyond my abitity. I'm a Woodworker with limited electronics skills. I was hoping someone here may have a pinout for this board to allow the use of a signal generator.

 

Do you have a meter and the ability to use it to trace the input to the 4 pin 817 Opto isolator IC ?

 

Do you have a meter and the ability to use it to trace the input to the 4 pin 817 Opto isolator IC ?

Yes I do have a meter and can manage. Identifying these components on the board would be the greatest darw back

 

You just need to identify the connector input pin and the input of the 817 opto using the resistance scale of the meter.
There might be a low value resistor in between so it may just read a low (~100Ω) value.

 

You just need to identify the connector input pin and the input of the 817 opto using the resistance scale of the meter.
There might be a low value resistor in between so it may just read a low (~100Ω) value.

Pin 1 I assume is the one with the dot? and Pin 4 the one counting c-clockwise 2,3,4? There are 5 of those 817 just infront of the header and two to the right. If pin 4 is just above pin 1 counting c-clockwise I am not getting any reading from that pin on any of those 817? Please forgive my lack of knowledge.

 

The input is usually pin 1 (has the Dot) with 2 at GND.

 

The input is usually pin 1 (has the Dot) with 2 at GND.

View attachment 359969

So I should be using pin 1 not pin 4??

 

Yes, the input is to pin 1.

 

The input is not always at pin-1.
1) You can have a driver that supplies current at pin-1.
2) You can also have a driver that sinks current at pin-2.

If you have 0 volts at both pins 1 and 2 when at idle, then you have case (1)
If you have non-zero volts at both pins 1 and 2 when at idle, then you likely have case (2). It could mean something else.

 

The input is not always at pin-1.

Yes, I did not want to confuse the issue, as these TM's invariably use the pin1 anode input and GND the cathode, oin 2.

 

If your controller is anything looking like this, then yes, positive voltage signal comes in at pin-1 at opto-coupler F817, U1 and U2

 

That is for one of the MC2100 versions,
The thing to watch for when using any kind of 20hz PWM into HD2 pin4, is some may require a series resitor in the input lead as they only have an on-board low resistance, e,g, R2 = 22Ω as shown.

 

Yes, the input is to pin 1.

Ok the board has U4A, U5A, U7, U6 and U2 and P4 Header with 7 pins. Pin 1 on U6 & 7 to pin 6 (green) on P4 header reads 220 Kohms. Pin 1 of U2 to pin1 (black) on P4 reads 150 Ohms. Have no idea what all this means

 

Can you show a close up of the two headers that are close to each other on the left hand bottom end?

 

Can you show a close up of the two headers that are close to each other on the left hand bottom end?

Hope this helps