Bally S5500 Reel problem

[satelliteman]

Looking for some direction with this.  My brother-in-law's machine had a low battery (81) code, so I replaced it for him.  I did a complete ram clear and thought all was well.  After moving the jumper & re-installing the board, I powered it up.  It accepted the coins, but when I began the play cycle, only reels 1 & 3 spun. Reel 2 just goes into a jerking motion, forward & back, and the machine tilts out after the first reel locks in.  I swapped reels 2 & 3, the problem stays in the reel 2 position.  I put his board in my machine with the same result, jerky #2 reel.  Obviously the problem is in the main board, but where?  I tried re-seating the chips with no change.  In the manual it tells you to go to test 5, & hold the change button while do this to initialize the reels.  It had no effect, same problem.  Does anyone have any ideas what I can do next, short of replacing the board?

[Sunrise Side]

Not sure which chip and resistor controls the reels? Get another board or send it to K-Larry , Larry  Weber for repair.

[satelliteman]

I've been searching for a working replacement board.  Haven't located anything yet.  I am aware of Larry Weber's services.  Thanks for your response though.

[mr-monoxide]

I've had that happen on two seperate occasions. The 1st time the problem was solved just by unplugging the offending reels wire harness and then simply plugging it back in, re-seating the connection. The 2nd time the problem turned out to be a bent "prong" where the cpu plugs into the back plane board. Those little brass prongs are real easy to bend, I would definitely check to make sure. A bent one will cause all kinds of mayhem...

[satelliteman]

It's not the wire harness.  The reason being that the problem follows the board.  I tried my brother-in-law's board in my machine & got the same reaction.  Conversely, when I put my board in his machine, his machine plays fine.
I checked the connectors.  All the "prongs" are straight, none bent.
Thanks for responding though.  Apparently, this isn't a common problem, since I've gotten so few replies.

[mr-monoxide]

On the cpu board find the bank of dip switches located at position JW3 move SW.7 back and forth a couple times making sure that it is fully on or off and not resting in between on/off. SW.7 controls reel spin, on = normal reel spin, off = crazy reel spin (reels randomly spin in different directions). Also be sure that SW.8 is on. Do that then do a ram clear and see what happens.

[satelliteman]

Tried it........same result.  Actually had a glimmer of hope for a second.....Reel #2 spun in the correct direction momentarily, then went back to shuddering as before.  Thanks again.

[satelliteman]

Well.......apparently this problem has all the experts out there stumped.  Lots of views.........but no good news!

[mr-monoxide]

Either the mpu got damaged in some fashion during the battery swap or the required chips removed to perform a safe ram clear are not re-installed properly.

[satelliteman]

Ram clear doesn't require chips.  Just use the jumper to clear.  I've never had a problem changing batteries before.  I've done quite a few.  Oh well, replacement board is on its way.  I guess I've got another "parts" board.  Thanks for your response.