So I'm stumped on this one,
Picked up a roadshow and reds mouth would not stay up.
Thought a stripped gear was the problem but on closer investigation I found that the motor is stuck always on in the down direction.
It does change direction when its supposed too but when it should be off its moving down,

Ted is fine,
I've compared all the components on teds side (in circuit) to reds and they seem ok.
driver board.jpg

With the driver board connected (game in attract)I get +12v at pins 10,11
+12v at both 4 (red on) and 8 (red direction)
0v at both 2(ted on ) and 6 (ted direction)

But with the board disconnected I have only 12v at 10,11

To me this points to the Dual H-Dive motor board and not back at the power driver board.
Could the IC (ba10339) be the problem?

2015-03-09 19.57.59.jpg

Any ideas or advice welcome!
Thanks

No the wires are not reversed,
It looks to me like one of the transistors is stuck on.All looks good on the tests tho.

I've ordered new transistors for the red side of the board.
and a new IC,just in case.

thanks zaza,
I'll spend a bit more time at it later and report back,

No its getting power all the time in the down direction.
soon as the game comes on the mouth shoots down and stays there,
I've a few suggestions from this thread I'll try later.
I do plan on getting new gears etc when I have it sorted.

yep thats the first thing I'll do later,
Swap pins 4,2 and 8,6

If the problem moves its the Duel driver board,
If the problem stays with red its the Q42 transistor

Simples!
Thanks

OK,
Update.
Switched the sides and the problem stayed on the red side.
Looks like Q42, red motor on is the culprit!
Will Update again once I have it switched out for a new one.
Thanks!

Update.
New tip 102 transistor at Q42 and all is good!
Next up the eyes!
Thanks for the help