Twilight Zone
Bally, 1993Hi,
Since I replaced my MPU board with a new Rottendog one, I get the message at the machine start up, clock is broken. But the clock test works perfect regarding quarters indicators and hours, in fasr, slow, forward and reverse mode.
I do not know if this a feature, but in the middle of the game the clock hands spin loosely for a while, then stop on midnight.
Does anyone have an idea of the problem ?
thanks in advance
Quoted from jimy_speedt:I do not know if this a feature, but in the middle of the game the clock hands spin loosely for a while, then stop on midnight.
That's not a feature. It means that the MPU isn't able to decode the location of the hands from the 8 optos on the clock board.
Make sure that J103 is connected. The 4-pin plug provides ground for the clock.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info
J103 looks good.
Now it's a matter of probing around to find the failure.
Could be the clock opto's, the clock minute hand, the special 10-opto board, connectors, etc, etc.
Lot's of things to investigate.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info
Check the wires found inside the clock itself.
They are bent at such a severe angle where they go in the bottom of the clock they commonly break inside the grey shielding on them. It could be as simple as a bad ground to the clock optos inside those wires.
DMM on buzz tone one side of the clock plugs to the other.
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Étalle
Hillsboro, OR
that's a smart support. No I ordered a new assembly in Germany. Hope it will solve the issue
Grimsby, ON