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Stargate - Lower left ball gate problem

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Evil777

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May 29, 2022, 4:50:56 AM5/29/22
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Hi, i have a Stargate and the lower left ball gate does not work, I checked the switches, fuse and the coils and they are all ok, I hope someone can help me.
https://photos.app.goo.gl/bEkadKPBvgS5BVkG7

John Robertson

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May 29, 2022, 7:40:05 PM5/29/22
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On 2022/05/29 1:50 a.m., Evil777 wrote:
> Hi, i have a Stargate and the lower left ball gate does not work, I checked the switches, fuse and the coils and they are all ok, I hope someone can help me.
> https://photos.app.goo.gl/bEkadKPBvgS5BVkG7

Put the game into self test and run the Ball Gate Test and see what
happens...

John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
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MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
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Evil777

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May 30, 2022, 4:50:51 PM5/30/22
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In self test work fine, in game not.

John Robertson

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May 31, 2022, 10:47:59 AM5/31/22
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On 2022/05/30 1:50 p.m., Evil777 wrote:
> Il giorno lunedì 30 maggio 2022 alle 01:40:05 UTC+2 John Robertson ha scritto:
>> On 2022/05/29 1:50 a.m., Evil777 wrote:
>>> Hi, i have a Stargate and the lower left ball gate does not work, I checked the switches, fuse and the coils and they are all ok, I hope someone can help me.
>>> https://photos.app.goo.gl/bEkadKPBvgS5BVkG7
>> Put the game into self test and run the Ball Gate Test and see what
>> happens...
>>
>> John :-#)#
>>
> In self test work fine, in game not.

If the gate works in self test then it is OK. You have to figure out
which switches activate it (or release it) and check those in Switch
Test. It pretty much has to be a badly adjusted, noisy, or defective
switch as the computer can control the gate as you proved in the gate test.

Evil777

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May 31, 2022, 12:22:27 PM5/31/22
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the strange thing is that the defect occurs only when the ball touches the switches that should activate the coil of the left ball gate, normally the defect does not manifest itself, for example it does it as in the video when the ball goes into the sensor of the Skill shoot, i have check all switch and all ok.

John Robertson

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May 31, 2022, 7:11:42 PM5/31/22
to
On 2022/05/31 9:22 a.m., Evil777 wrote:
> Il giorno martedì 31 maggio 2022 alle 16:47:59 UTC+2 John Robertson ha scritto:
>> On 2022/05/30 1:50 p.m., Evil777 wrote:
>>> Il giorno lunedì 30 maggio 2022 alle 01:40:05 UTC+2 John Robertson ha scritto:
>>>> On 2022/05/29 1:50 a.m., Evil777 wrote:
>>>>> Hi, i have a Stargate and the lower left ball gate does not work, I checked the switches, fuse and the coils and they are all ok, I hope someone can help me.
>>>>> https://photos.app.goo.gl/bEkadKPBvgS5BVkG7
>>>> Put the game into self test and run the Ball Gate Test and see what
>>>> happens...
>>>>
>>>> John :-#)#
>>>>
>>> In self test work fine, in game not.
>> If the gate works in self test then it is OK. You have to figure out
>> which switches activate it (or release it) and check those in Switch
>> Test. It pretty much has to be a badly adjusted, noisy, or defective
>> switch as the computer can control the gate as you proved in the gate test.
>> John :-#)#
>>
> the strange thing is that the defect occurs only when the ball touches the switches that should activate the coil of the left ball gate, normally the defect does not manifest itself, for example it does it as in the video when the ball goes into the sensor of the Skill shoot, i have check all switch and all ok.

Is this a blade styule switch or a microswitch? If a blade style. make
sure there is an insulator between the actuator wire and the blades of
the switch - stray grounding through the ball to other metal items can
cause weird issues.

Test the Switches using the pinball and move it exacly as it would
during game play. Not fast, but the path the ball would take. Switch
Test may show something then...

Evil777

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Jun 2, 2022, 2:02:07 PM6/2/22
to
when the ball touches the sensor of the Skill Shoot or the blade that defect happens, under the top I took a look but there don't seem to be any cables out of place, where could I check?
https://photos.app.goo.gl/Z6jmKnoFHUJf9UUL9
https://photos.app.goo.gl/1ZRmX4rzWN32arGaA

Evil777

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Jun 2, 2022, 2:49:03 PM6/2/22
to
initially the problem was the pyramid that rose only 1 cm, then the pyramid settled on its own and the problem moved on to the "lower left ball gate"
https://photos.app.goo.gl/7dRxN8LYZk6ByDTH6

John Robertson

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Jun 2, 2022, 8:06:10 PM6/2/22
to
On 2022/06/02 11:02 a.m., Evil777 wrote:
> Il giorno mercoledì 1 giugno 2022 alle 01:11:42 UTC+2 John Robertson ha scritto:
>> On 2022/05/31 9:22 a.m., Evil777 wrote:
>>> Il giorno martedì 31 maggio 2022 alle 16:47:59 UTC+2 John Robertson ha scritto:
>>>> On 2022/05/30 1:50 p.m., Evil777 wrote:
>>>>> Il giorno lunedì 30 maggio 2022 alle 01:40:05 UTC+2 John Robertson ha scritto:
>>>>>> On 2022/05/29 1:50 a.m., Evil777 wrote:
>>>>>>> Hi, i have a Stargate and the lower left ball gate does not work, I checked the switches, fuse and the coils and they are all ok, I hope someone can help me.
>>>>>>> https://photos.app.goo.gl/bEkadKPBvgS5BVkG7
>>>>>> Put the game into self test and run the Ball Gate Test and see what
>>>>>> happens...
>>>>>>
>>>>>> John :-#)#
>>>>>>
>>>>> In self test work fine, in game not.
>>>> If the gate works in self test then it is OK. You have to figure out
>>>> which switches activate it (or release it) and check those in Switch
>>>> Test. It pretty much has to be a badly adjusted, noisy, or defective
>>>> switch as the computer can control the gate as you proved in the gate test.
>>>> John :-#)#
>>>>
>>> the strange thing is that the defect occurs only when the ball touches the switches that should activate the coil of the left ball gate, normally the defect does not manifest itself, for example it does it as in the video when the ball goes into the sensor of the Skill shoot, i have check all switch and all ok.
>> Is this a blade style switch or a microswitch? If a blade style. make
>> sure there is an insulator between the actuator wire and the blades of
>> the switch - stray grounding through the ball to other metal items can
>> cause weird issues.
>>
>> Test the Switches using the pinball and move it exacly as it would
>> during game play. Not fast, but the path the ball would take. Switch
>> Test may show something then...
>> John :-#)#
> when the ball touches the sensor of the Skill Shoot or the blade that defect happens, under the top I took a look but there don't seem to be any cables out of place, where could I check?
> https://photos.app.goo.gl/Z6jmKnoFHUJf9UUL9
> https://photos.app.goo.gl/1ZRmX4rzWN32arGaA

The second photo seems to show a Molex plug wedged under the wire ramp.
Any chance there is an electrical connection between the plug wiring and
the wire ramp?

Evil777

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Jun 3, 2022, 12:01:44 PM6/3/22
to
yes there is a molex plug underneath but I checked and everything is ok, I also tried to disconnect it and the problem remains.

John Robertson

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Jun 3, 2022, 1:43:06 PM6/3/22
to
> yes there is a molex plug underneath but I checked and everything is ok, I also tried to disconnect it and the problem remains.

All I can suggest at this point is to use the game's Switch Tests and
check all switches related to the gate. And others around it.

Evil777

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Jun 3, 2022, 2:26:47 PM6/3/22
to
https://photos.app.goo.gl/XeggDpXM8BnEREcr8
https://photos.app.goo.gl/u7WhGg6uC3P2u7rP6
https://photos.app.goo.gl/8QZPYCWZ3qnonaak8

Evil777

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Jun 3, 2022, 2:36:26 PM6/3/22
to
In switch test switch 41 "Ball Gate Sensor" is inoperative.

John Robertson

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Jun 3, 2022, 3:00:08 PM6/3/22
to
> https://photos.app.goo.gl/XeggDpXM8BnEREcr8
> https://photos.app.goo.gl/u7WhGg6uC3P2u7rP6
> https://photos.app.goo.gl/8QZPYCWZ3qnonaak8

You are not using the Switch Test - you are activating switches while
the game is in Play mode.

Do you have the operators manual? If so read up on how to do the built
in Switch Test. Then activate all the switches, one at a time while in
Switch Test and see if only that switch shows as activated on the
display screen.

If you don't have the manual, then get a copy from eBay or The Pinball
Resource. You will need it.

John Robertson

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Jun 3, 2022, 5:39:46 PM6/3/22
to
>> https://photos.app.goo.gl/XeggDpXM8BnEREcr8
>> https://photos.app.goo.gl/u7WhGg6uC3P2u7rP6
>> https://photos.app.goo.gl/8QZPYCWZ3qnonaak8
> In switch test switch 41 "Ball Gate Sensor" is inoperative.

Then concentrate on #41. Check the wiring, does the switch register if
you move the wire and try manually moving the gate and see if the switch
responds then.

Do all other switches work properly in Switch Test?

Evil777

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Aug 25, 2022, 7:27:20 AM8/25/22
to
I John it seems that the problem is not the "A1" switch but an integrated component, could you tell me on which board the A1 switch is connected?

John Robertson

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Aug 31, 2022, 10:08:06 PM8/31/22
to
> I John it seems that the problem is not the "A1" switch but an integrated component, could you tell me on which board the A1 switch is connected?

Sorry, stuck home with Covid, no manual handy. Will try to get an answer
next week for you when I am better. Not feeling bad, just testing
positive still.

John :-#(#
Message has been deleted

John Robertson

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Sep 1, 2022, 1:14:24 PM9/1/22
to
On 2022/09/01 2:12 a.m., Evil777 wrote:
> i'm so sorry, i hope you get negative, i have the manual online: https://drive.google.com/file/d/1u5ROWlTO6zq-i1toZwOx6cf5yxb-LT49/view

Please take the manual down as it violates international copyright law
to have it posted. Don't want you getting in trouble!

John :-#)#

Evil777

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Sep 2, 2022, 5:19:56 AM9/2/22
to
Ok i have delete my post with link.

Evil777

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Jan 4, 2023, 7:28:06 AM1/4/23
to
I John Robertson, do you know the ic (integrated circuit) that manages to raise the pyramid?
Thanks

John Robertson

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Jan 4, 2023, 2:46:47 PM1/4/23
to
On 2023/01/04 4:28 a.m., Evil777 wrote:
> I John Robertson, do you know the ic (integrated circuit) that manages to raise the pyramid?
> Thanks

Hi!

I don't have a Stargate in the shop so I can't trace the wiring. Looking
at my manual I can't find where the Motor Interface Board (A28 - see
page 56) is connected to anything in the cabinet! I assume this is for
the motor for the Pyramid...

At this point I would ask you to trace the control lines from A28-P1
back to the control boards to figure out what the control logic is. If
you can find the wire colours and where they go that will help!

Looks like Gottlieb simply forgot to document that in the Instruction
Manual...and rummaging through my 1995 Service Bulletins doesn't give
any help other than the following 2 notes for Stargate:
---------------------------
Changed page 25 and 56
"F26" should be 2-1/2 Amp Slo-Blo Fuse, EL-21

Changed Page 76
Spaceship and Bracket Assembly 31308 (Corrected Part Number)
---------------------------



John :-#(#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.

Evil777

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Jan 5, 2023, 8:17:21 AM1/5/23
to
Thanks i try it

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