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BOP New issues - Head motor/switch error

OK then the 12vdc is missing.

Do you have the Red/white and the Blck wires connected on J1 of that pcb as thats the gnd and 20v DC input.

So do you have 20vdc on pins 1 and 2 of J1?
 
Yes, in j1-1 is red/ white
J1-2&3 is black.

Between j1-1 and j1-2 I have 0.9.
 

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Then there is no 20vdc.

You need to trace that back. I dont have any drawings . Probably a fuse or bad wiring?

Is the black wire looping through? as nothing is shown connected on pin 3 on the drawings I do have for the reg circuit
 
Hmm,
Yes 20v light is out on the board,
I have fixed this once before I had to change the br4 bridge
 
Seeing as your testing whislt powered you could be blowing the fuse.
Be careful as you can damage other IC's.

Change the fuse without the motor reg connected and test the 20vdc.
If ok then connect and see if it pops.
 
Last edited:
You have your test leads in the wrong place in the meter. The black lead should be on the centre hole marked com, and the red where it is.

The left hole is a second option for the red lead if you are measuring current through the device.
 
Motor reg board back in and 20v light on board is still there.
I'll repeat the tests now vimto
 
"Measure across pins 1 and pins 3 of J2 of the regulator board A-13892-2. It should be 12vdc"

Can't do that now, it smokes and sparks!
 
Sorry. To be clear. Your red lead should be on the right hand side. Black in the middle.
 
I didn’t clock that you had them reversed initially. If you have red in left then you’re putting a short across the circuit v
 
Perfect ,no sparks now :rofl: :rofl:

Between pin 1 and 3 on j2 I now have 12.9v

Between j1-1 and j1-2 I have 23.4v
 
Motor/switch test.
Homing head does nothing.
Calibration error

Head manual test
Relay clicks but no movement.
 
OK then the relay is working .

You need to test that you have 12vdc at J2 pin 4/7 on the relay board.
Use J2 pin 2 on the regulator board as your gnd reference. So place your black probe from your meter on here.

Red probe on relay J2 pin 4 or 7
 
Thanks,

I use Gnd on j2-2 as suggest
And place red on pin 7 of the relay board and get 0.

When I look at the relay board.
I am working right to left.
So furthest right pin 1, furthest left is pin 7.

Then the two separate pins start again as pin1 and pin2 ? Again pin one being on the right
 

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Edit to the above.
When I use pin2 as the gnd I get 0
When I use a braided wire I get 13v
 
Reread my previous message as the connections are for the two boards.

Use J2 pin 2 on the regulator board as your gnd reference. So place your black probe from your meter on here.

Red probe on relay board J2 pin 4 or 7
 
Hi,
Yes that is what I am doing.
The two separate boards, red is on relay board, black is on the motor reg board

I think you may mean j1-2 on the reg board as the gnd? If so that gives 12.9v
 
I am putting the black on the orange marks.

The middle orange with the black wire gives me 13v

The one opposite with no wire gives me 0


I am putting the red on the green marks
 

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Must be an error on the drawing as Gnd should be there.
So 12dc is OK.

I dont have the complete drawings but guess that the driver board pulls down relay J2 pins 5&6 down to gnd to turn on motor.

Can someone check to see if it's oK to pull them hard down to gnd please.
 
I think when I removed 5&6 and put them to braided wire last time that is what blew the fuse, as last night I had 20v
 
cr5000462 said:
I think when I removed 5&6 and put them to braided wire last time that is what blew the fuse, as last night I had 20v
Click to expand...

To test it out its best to remove that connection at the drive board. Not sure what that is as no drawings

That way we can pull the relay board J2 pins 5&6 to gnd and the motor should spin
 
Just remove the wire out of the drive board or the full socket with the other wires on it?
 
If you pull just that wire off and connect J2 pins 5&6 on relay board to gnd then the motor should spin

Blue/yellow
 
I chased the blue yellow back to the board.
It goes to j122-4

I tugged it and it came off in a huge strand! It must have been broke off already!

I chased it back to the join,
Put it to gnd (braided wire, in the backbox)
Still nothing.

It's still connected on the relay board when I'm doing this, should it be?

I've tested this out of all settings tests and again with it on manual head test motor on
 
No I think you just stripped the outer off.

Check the connector going to the motor when that wire is connected to gnd you should have 12vdc on the output to the motor.
Pins 1&2.

and test the motor on 12v.

Also check that there are no dry joint on the relay board as @Spandangler mentioned.

Also check continuity of all wiring thats involved.

I dont think I can suggest anything else.

Maybe @pinballmania has any idea's
 
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