I have added more information on post #444.
You should find this useful.

Thanks MrChips looks like good stuff. An opportuniy to sharpem my skills and learn the language but first i need to varify that my 7 pin header is the same pinout and to do that I need to do a lot more reading.

 

Thanks MrChips looks like good stuff. An opportuniy to sharpem my skills and learn the language but first i need to varify that my 7 pin header is the same pinout and to do that I need to do a lot more reading.

First step is to check for +12 VDC on pin-1.

 

First step is to check for +12 VDC on pin-1.

I have 12V on the black to brown wire therefore I assume #1 on my header is on the left (black) #2 (brown) and reading 5V on #6 green. The voltage on #6 started at around 9v and bleed down to around 5V. So would this 7 pin header be the same?

 

I have 12V on the black to brown wire therefore I assume #1 on my header is on the left (black) #2 (brown) and reading 5V on #6 green. The voltage on #6 started at around 9v and bleed down to around 5V. So would this 7 pin header be the same?

I am quite certain that the pinout on the 7-pin connector is the same. Note that your 7-pin header is rotated 180° based on the two notches on the connector.

Connect ST (pin-5) to GND and you should hear a relay click.

 

I am quite certain that the pinout on the 7-pin connector is the same. Note that your 7-pin header is rotated 180° based on the two notches on the connector.

Connect ST (pin-5) to GND and you should hear a relay click.

Tried pin-5 to ground don't here any relay click

 

Tried pin-5 to ground don't here any relay click

This guy is using a 17805 transister where does that come into play? What is the purpose

 

When you apply AC power to the board, does a green LED turn on?.

The 7805 voltage regulator is to create a +5 VDC supply for the +12 VDC on pin-1. We don't know as yet if this is required.

With the power ON, measure the voltages at pin-1 and pin-2 with respect to GND of some of the 817 opto-couplers.

 

When you apply AC power to the board, does a green LED turn on?.

The 7805 voltage regulator is to create a +5 VDC supply for the +12 VDC on pin-1. We don't know as yet if this is required.

With the power ON, measure the voltages at pin-1 and pin-2 with respect to GND of some of the 817 opto-couplers.

Yes the green light comes on. When you say with respect to GNG of some of the 817 opto-couplers, are you talking pin 1 & 2 of the opto coupler to pin 2 of the header? Not sure I follow

 

Yes the green light comes on. When you say with respect to GNG of some of the 817 opto-couplers, are you talking pin 1 & 2 of the opto coupler to pin 2 of the header? Not sure I follow

Pin 1 of U2 (817) to GNG has reading of 11.66V, pin 2 of U2 to GNG has a reading of 10.55V. No readings on any of the other 817.

 

Can you post a closeup, well focused photo of this section of the board?
We want to see which 817 opto is connected to S+, S-, and ST pins of P4.



Edit: Sorry, I see that you already did that. The lightning and the angle at which the photo is taken can be improved.

Can you trace which opto pin-2 is connected to which pins of P4?
It looks like pin-2 is connected to an LED before reaching a P4 pin?
Ideally, it would be nice to draw out this part of the circuit.

 

Can you post a closeup, well focused photo of this section of the board?
We want to see which 817 opto is connected to S+, S-, and ST pins of P4.

View attachment 360244

Edit: Sorry, I see that you already did that. The lightning and the angle at which the photo is taken can be improved.

Can you trace which opto pin-2 is connected to which pins of P4?
It looks like pin-2 is connected to an LED before reaching a P4 pin?
Ideally, it would be nice to draw out this part of the circuit.

View attachment 360245

u6 pin 2 to pin4 (orange), u7 pin 2 to pin 3 (Red) and u3A pin 2 to pin5 (yellow)

 

Going from left to right on the 7-pin connector, this is what I see:

1 - BLACK = +12V
2 - BROWN = GND
3 - RED = S+
4 - ORANGE = S-
5 - YELLOW = ST
6 - GREEN = GD
7 - BL = CGQ

Is there any voltage at pin-6 ? If not, can you supply +5 VDC to pin-6?
Then check the voltage at pin-1 and pin-2 of the 817 optos.
If you get close to +5 VDC, then grounding pin-5 YELLOW should activate a relay.
Then intermittently touching pin-3 RED to GND should increase the motor speed (power output to a test lamp).

 

Going from left to right on the 7-pin connector, this is what I see:

1 - BLACK = +12V
2 - BROWN = GND
3 - RED = S+
4 - ORANGE = S-
5 - YELLOW = ST
6 - GREEN = GD
7 - BL = CGQ

Is there any voltage at pin-6 ? If not, can you supply +5 VDC to pin-6?
Then check the voltage at pin-1 and pin-2 of the 817 optos.
If you get close to +5 VDC, then grounding pin-5 YELLOW should activate a relay.
Then intermittently touching pin-3 RED to GND should increase the motor speed (power output to a test lamp).

There is no voltage on pin #6. Applying 5V to pin #6 I get the following readings from GND; u7 pin #2 - 4.39Volts, u6 Pin #1 - 5.1 volts and u2 Pin # 1 - 11.6 and u2 pin 2 - 10.5v. Following the steps you outlined I get the relay startup and red to ground will light the bulb The motor will spin up and down. Soft start still exist

 

So the controller is working as expected?

 

So the controller is working as expected?

Thanks MrChips it do work and I had no doubt the controler was working because I have the main computer board that came with it but my aim is to operate the control board without the main computer board. The method we have just varified will do that, although a little cumbersome, and that is absouletly great. Still hoping to find a way to use that board and use a potentimeter to control the speed similar to the MC2100?? Looks as though that may not be possible.

 

Thanks MrChips it do work and I had no doubt the controler was working because I have the main computer board that came with it but my aim is to operate the control board without the main computer board. The method we have just varified will do that, although a little cumbersome, and that is absouletly great. Still hoping to find a way to use that board and use a potentimeter to control the speed similar to the MC2100?? Looks as though that may not be possible.

I am using an external source to apply 5v to pin #6 is there some where on the board I could use to get the 5v? Could pin #1 be used to supply the required voltages?

 

I am using an external source to apply 5v to pin #6 is there some where on the board I could use to get the 5v? Could pin #1 be used to supply the required voltages?

In the video, he uses an LM7805 voltage regulator to get +5 VDC from the +12 VDC on pin-1.

 

In the video, he uses an LM7805 voltage regulator to get +5 VDC from the +12 VDC on pin-1.

Ok, now it's clear what the regulator in the video was for Thanks again MrChips appreciate it