Craziest Deck lite problem

[Running2]

O.K. guys bear with me on this one. on 82/70 w/solid state chassie w/xop board and accuscore plus and advantage system, heres the problem. The deck light cuts in and out, but only during the spotting cycle and only when the machine is turned on from the front desk! When cycled for respot everything is fine. When spotting, the M-relay in the chassis hums and the fuse blows in the deck light. Troubleshooting has been, Changed light,(problem does not move) changed chassis,checked all wires and grounds,checked wires from old front desk switches that are still connected through advantage,ran new wire from desk switch to machine, changed cwc, now it gets weird, we have the box mounted below the cwc that is the junction for foul light wires,manager control and 10th frame. When i swapped plugs from the problem machine to the mach next to it the problem moved, however,all the wires in that plug checked out ok and theres nothing in that plug that isnt low voltage. It appears to be a voltage problem since it only does it when the machine is in spotting and drawing the most power. But why is it only happening when the machine is turned on up front. If its turned on from the back it runs fine. Is something else tied in from the front desk that adds additional pwr to the machine. By the way i also changed lane a boards in the liu and moved plugs in the home run box. Running out of hair to scratch off my head! HELP!! THANKS

[8270king]

Re: Craziest Deck lite problem

I think your problem is under the Managers contol upfront.....there is a diode/resistor under the frame counters....look there.

JK

[Keep them running]

Re: Craziest Deck lite problem

No, I B-mechanic here. I work with gw407. I cut all wire going to insruct-o-mat. All thats left is 4 wires. 2 going to the pinspotters and 2 going to the LIU. We have been on this problem for 3 weeks now.

[TheGMan143]

Re: Craziest Deck lite problem

I would disagree with a voltage problem... if you said the M relay hums when spotting, it could be possible... but if it's blowing a fuse, voltage drop is kind of taken out of the picture.

As it was said, take a look at your manager's control circuit up front first.

I've seen something similar to this... a bad time delay module in the chassis was causing the M relays to act up... after it was replaced, the problem disappeared.

[Rep]

Re: Craziest Deck lite problem

Weird problem to say the least... We get some problems with contact chatter and lanes flickering when the managers control toggle switches are used but nothing this bad. I would have to agree with "G" here, if ya moved the wire in the A&MC box and the problem moved it's gotta be in that circuit somewhere. Good luck!

[Keep them running]

Re: Craziest Deck lite problem

it's not the the m-relay humming, but the spotting relay.

[TheGMan143]

Re: Craziest Deck lite problem

Just to be silly, take the bottom plate off your chassis and have a look at the relay sockets. AMF used sockets with long 'wiretails', and occasionally, one can get bent over and will touch the ones next to it... it's a longshot, but we may as well rule out everything.

[Ar Rar]

Re: Craziest Deck lite problem

It sounds to me like a low voltage on the managers circuit is causing fits for chassis relays. This is why the problem moves when you changed the plugs from the a&mc box, why the problem doesn't happen when you turn the machine on in the back (you eliminate the front loop), and why changing chassis doesn't help. I would do a voltage reading on the managers control circuit and compare it with a reading from another machine and from the same machine when it is turned on in the back. That may tell you where to look next.

Roger

[uncle phil]

Re: Craziest Deck lite problem

Sounds like a voltsge problem in the 110 volt line. wHEN YOU spot pins you are also energizing the counter up front. If the voltage is low you dont get a full 24volts to the M relays and they drop in and out,this is where the buzzing comes from while spotting. You can try unhooking the counter up front and it should work.

[Keep them running]

Re: Craziest Deck lite problem

The counters was disconnected.

[Running2]

Re: Craziest Deck lite problem

Well guys this was wierd, I disconnected all wires to the A&MC box for the problem lane, (it was a real rats nest) shortened some wires and replaced all the connectors. Put it all back together and it WORKED!! Now we had done continuity and voltage on everything and even bypassed a&mc with new wire on others and could not find a problem wire. GO FIGURE? We shall see if it lasts. Thanks for your inputs.