(Topic ID: 289057)

Gulfstream project

By vipertblck

4 months ago


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  • 14 posts
  • 6 Pinsiders participating
  • Latest reply 4 months ago by vipertblck
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#1 4 months ago

just picked up a gulfstream. need some help/guidance. upon flipping the switch, it's dead; front reset button is dead, but left flipper triggers on the lock relay. that's as far as it'll go. if i manually trigger the reset relay, the score motor just spins and spins, but the score reels won't zero. i've tampered here and there with it, and i can get some score reels to move when i hit the corresponding relays to fire them. for now, my goal is to get the score reels to zero and have it react when the front reset button is pushed.

#2 4 months ago

Welcome to the EM Hangout. There are many people here to help you, but we also need you to understand a little bit about EM repair. Two great websites to read up on are:

https://www.pinwiki.com/wiki/index.php?title=EM_Repair

and the one mentioned below.

Roll the credit wheel and add some credits to the machine.

#3 4 months ago

Look at the schematic. In the lower left you’ll see the score motor diagram. On the impulse cam, you’ll see a switch labelled PULSES SCORE RESET RELAY. Make sure that switch is closing as the score motor turns. Then make sure that relay is actually energizing. That is what resets the score reels.

If you haven’t already, start reading http://www.pinrepair.com/em/

#4 4 months ago

Remove Head from machine sans backglass.
Lay it on a table flat with easy access to score units.
Clean each score unit.
Clean 10/100/1000 Point Relays.
Replace Head.
Clean Jones Plugs and push in.

#5 4 months ago

.

#6 4 months ago
Quoted from dr_nybble:

Look at the schematic. In the lower left you’ll see the score motor diagram. On the impulse cam, you’ll see a switch labelled PULSES SCORE RESET RELAY. Make sure that switch is closing as the score motor turns. Then make sure that relay is actually energizing. That is what resets the score reels.
If you haven’t already, start reading http://www.pinrepair.com/em/

switch is open until the tip of that cam comes and rises it, then it closes those contact giving it continuity as shown by my meter. when i manually trigger the reset relay and the score motor begins to spin, it is not energizing the score reset relay. if i manually trigger the score reset relay, it moves the score reels. based on this, it seems the connection between the impulse b switch and the score reset relay is bad. have to trace down this circuit and make sure we have continuity/clean contacts i suppose

#7 4 months ago

The circuit also passes through a normally open switch on the reset relay so check it as well.

#8 4 months ago
Quoted from vipertblck:

and have it react when the front reset button is pushed

If the Replay button doesn't activate the Coin relay, Inspect and diagnose this circuit with Alligator clip jumper wires
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features
Example of a pinsider actually doing this https://pinside.com/pinball/forum/topic/red-baron-tech-question#post-5858156

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#9 4 months ago
Quoted from HowardR:

If the Replay button doesn't activate the Coin relay, Inspect and diagnose this circuit with Alligator clip jumper wires
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features
Example of a pinsider actually doing this https://pinside.com/pinball/forum/topic/red-baron-tech-question#post-5858156
[quoted image]

i was going to look into the score motor reset relay as one stated above. traced that out in the schematic (yellow to impul. cam b, brown-red to reset relay, white brown to score reset relay coil. you mention to check the coin relay, should that red button on the front of the machine always cycle the coin relay, as long as there's credits present?

#10 4 months ago

went through the reset relay circuit today and cleaned those contacts. it's better but still same issues. learned some new updates though! if i manually trigger the coin relay, it will zero out and start a game, most targets score, but ball drain doesn't acknowledge on outhole switch. as i stated before, my goal right now is to get the game to reset when you hit the front button. my game does nothing, and just clicks the lock relay when you hit the right flipper. to get it to reset, i need to manually trigger the coin relay.

seeing as im trying to get it to reset by pushing the button on front, what is this button called in the schematic. i figured to try and look at the wiring for this button to see if it's somehow tied into the coin relay anywhere.

EDIT, this is exactly what howard in post 8 recommended. i just went through and played with it before reading all the posts...

#11 4 months ago
Quoted from vipertblck:

went through the reset relay circuit today and cleaned those contacts.

Quoted from vipertblck:

this is exactly what howard in post 8 recommended.

Sorry but cleaning contacts is not what I recommended.

#12 4 months ago
Quoted from vipertblck:

seeing as im trying to get it to reset by pushing the button on front, what is this button called in the schematic.

The button at the front of the cabinet you push to start a game is called the Replay button.

#13 4 months ago
Quoted from HowardR:

Sorry but cleaning contacts is not what I recommended.

thanks again to howard here! followed his suggestion on the coin relay path; did continuity checks, cleaned contacts along the way, and used jumper wires as stated; and it's working now. must have wiggled something clean because i found no faults during my checks. now when you push the replay button, it resets the game and zeros the reels. moving along nicely!

now were just left with some targets not scoring, back box has no lights, and the outhole switch isn't acknowledging the drained ball.

#14 4 months ago

narrowing down the outhole switch issue. when ball is drained, it doesn't acknowledge and shoot back out into the lane. im looking at the ball release coil, this looks like it's powered by the outhole relay and cam 4a. when i manually trigger the outhole relay it spins the cams and fires the ball release coil, this tells me that circuit is good, we just have the problem from the outhole switch to the outhole relay.
at about e10 on the schematic it shows the outhole relay. i've backtraced this but not sure to where exactly. the ball count unit switch IS closed when checking things.

am i on the right track?

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