Dr Who mini pf not working

[Homepin]

Rob, I'm certain this board is the same as one I make as a replacement here:

http://www.homepin.com/A15680.html

If so it needs 12 volts as it is a simple transistor bridge circuit and doesn't have any smarts.

That could be your issue - low 12V ?

[robm]

At pin 6 of J107 (power for motor driver board), i have 22V, HOWEVER, at pin5 of motor driver board i only have 9 volts.... by the diagram in the manual p3-15 this wire should be a direct link. Even when i unplug from the motor board, it still reads 9V (ie: to check there is not something on the motor board pulling down voltage).  I also see in the manual, that Flasher 17 joins the power wire connection between J107 on power driver board and the motor driver board - maybe this is part f the issue?

[Marty Machine]

Burnt out motor perhaps/stuck gearbox?? or dead driver transistor?

[robm]

Gearbox/motor works fine with a battery and i am using a power driver board out of another machine that was working 100%

[robm]

Finally sorted this one but I can't take credit for it.  Another member (pocketmoney) dropped in and we hsd a look. Turned out when testing voltages that the connection at the motor connector was intermittent. ... such a painful thing to find yet so simple to fix!

[Strangeways]

Finally sorted this one but I can't take credit for it.  Another member (pocketmoney) dropped in and we hsd a look. Turned out when testing voltages that the connection at the motor connector was intermittent. ... such a painful thing to find yet so simple to fix!

IDC connector ?

[robm]

No the small 2 wire one about 20cm after the motor