(Topic ID: 310638)

Spirit of 76 Gottlieb Score Reels and Bonus Value

By mikiemike1

2 years ago


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  • Latest reply 2 years ago by mikiemike1
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#16 2 years ago

If you are receiving double bonus and neither J nor LB are actuated, check out these two switches on the attached schematic. If either one is misadjusted and open, I'd think that would result in "double bonus-like" behavior. You'd get 2 bonus subtracts and 5000 points per motor cycle.
S76 double bonus error (resized).jpgS76 double bonus error (resized).jpg

As MarkG and Garrett stated above - the torque applied to the relay bank, if it is not firmly seated and the wing nuts tightened securely, might be the cause of the switch on LB being out of adjustment.

#18 2 years ago

LB is a relay, see MarkG post above, are your relays in that bank labelled?

#20 2 years ago

Mounted to the underside of the playfield itself, not on the motor board.

#22 2 years ago

Should be able to identify it from the wire colors.

LB relay (resized).jpgLB relay (resized).jpg

Actually, it looks like it's the first relay on the right (on the sample game), but verify with wire colors

https://www.ipdb.org/showpic.pl?id=2293&picno=74931&zoom=1

#24 2 years ago

Is the relay bank rotated fully back into its operating position and wing nuts tight?

Have you checked the Ball 5 bulb?

Does the "Double Bonus" light come on for the fifth ball?

Did you clean and adjust the switch on J?

#27 2 years ago

Ball 5 and Double Bonus light are the same wire... and Ball 5 is closest to the source (the Player Unit), trace the wire (blue) and check the ball 5 lamp socket.

Use a DMM on the blue wire on the socket, what voltage is it at?

#29 2 years ago

Could you do an experiment for the bonus issue? On ball 1, drop 3 targets (one at a time), scoring 3000 bonus (on the "Bonus Value" playfield lights) then let the ball drain... exactly how much does the score increase as a result of the 3000 bonus?

#31 2 years ago

Great, that is consistent with the error in the bonus path (5000 on first motor turn with 2 bonus subtracts and 2000 on the second with the last bonus subtract). Do you have jumpers? Can you short from point "A" to point "B" on the attached schematic (ignore the red arrows) and repeat the test?

S76 double bonus error (resized).jpgS76 double bonus error (resized).jpg
#33 2 years ago

Short one of the switches, do the test again, then short the other one and retest - that will tell you which of the two needs adjustment.

#35 2 years ago

Consider the wire between the two switches (BL-YEL) as point "C". For the first test jumper between A and C and for the second test jumper between C and B.

#37 2 years ago

The last test you ran determined that either the LB switch *or* J switch is not closed and, as a result, is causing your double bonus problem. Now, we're trying to determine *exactly* which switch is causing the problem, so we'll conduct two more tests. The first test will be to jumper (short) from Point A to Point C to determine if LB is causing the problem. Then run a second test with the jumper from Point C to Point B to see if J is the issue.

Report the results back and then we'll determine the next step.

Subtract bonus jumpers (resized).jpgSubtract bonus jumpers (resized).jpg
#40 2 years ago

According to the schematic, that BL-YEL is connected to both the LB switch and the J switch. You can connect it to either place.

The other end of the J switch has a GR+RED wire - to find a color of a wire, you need to follow that wire on the schematic until you see a color.

You should also start reading some background material that might answer many of your questions (reading schematics, wire colors, types of switches, cleaning and adjusting switches, etc.). Here's a good reference:
http://www.pinrepair.com/em/index1.htm

#42 2 years ago

Are you saying that your J switch does not have that color wire, or you don’t see it on the schematic?

#44 2 years ago

What color wires are on that J switch on your machine?

#46 2 years ago

Can you mark up the schematic, or send a picture of what you are jumpering? I'm not understanding statements like "But if I do the yellow blue switch on 3c on the score motor" - that is not on the schematic that I've included.

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