Need help troubleshooting Gorgar


By millionpoints

2 weeks ago


Stats

  • 13 posts
  • 4 Pinsiders participating
  • Latest reply 2 days ago by zacaj
  • Topic is favorited by 1 Pinsider

Find

Search this topic for posts matching certain words or written by a specific Pinsider. Or both!




Linked Games



Topic Gallery

One image has been uploaded to this topic. (View topic image gallery).

IMG_0394 (resized).jpg


#1 15 days ago

I picked up a non-working Gorgar through craigslist about 5 years ago.
I worked on it quite a bit and got it running when I first got it. The restoration/repairs took a back seat to some life events after about a year into it. I recently got the bug again and I'm looking for help to properly troubleshoot and get this machine back to 100%.

For reference, I'm running a rottendog MPU and an X-pin power supply, both purchased new. I have reseated all connectors, but haven’t replaced any yet.

The game currently plays OK start to finish, except for these switches (with switch matrix numbers):
-'4' stand up target (33)
-right out lane (34)
-'E' rollover (35)
-Right kicker (36)
-all jet bumpers pop but do not score points (37, 38, 39)
-stand up targets behind both drop target banks (22, 40)
-Magnet switch works but intermittently sticks for several seconds before releasing the ball (23)

The switch matrix diagram shows the affected switches fall on:
column 5 green-black (33-40)
row 6 white-blue (22)
row 7 white-violet (23)

switch test shows '08' in ball in play display. Will not cycle through any switches and skips to test 4.

During solenoid test,
-14 credit knocker
-16 coin lockout
-21 right kicker
Do not respond.

Upon further inspection, 14 and 16 both have cut wires and the coils look fried. Right kicker seems to have a broken diode, and has a different type of coil (sg-23 850 dc) than the left side (a2-23 750 dc).

I’m guessing it’s the one that currently works, but which is the correct coil to use for the kickers? Also, would 14 and 16 be related to the switch issue?

During test 3,
Shows '08' in ball in play display. Will not cycle through any switches and skips to 'test' 4. What is causing this?

I’m building a parts list and clearly there are coils needing replacement, and I’m sure switches as well. But I’m sure there might be something I’m missing. Any help is greatly appreciated.

#2 15 days ago
Quoted from millionpoints:

Shows '08' in ball in play display. Will not cycle through any switches and skips to 'test' 4. What is causing this?

What do you mean it skips?

It'll always show the lowest number closed switch, so see if switch number 8 is stuck closed

Quoted from millionpoints:

Also, would 14 and 16 be related to the switch issue?

No. Coin lockout isn't really necessary, I'd just leave it clipped. It's supposed to be on most of the time so they cook often

Quoted from millionpoints:

I’m guessing it’s the one that currently works, but which is the correct coil to use for the kickers?

According to the parts manual it's a SG1-23-850DC http://www.planetarypinball.com/reference/partsmanuals/WMS_Parts_1980/files/mobile/index.html#94

It's possible your broken diode has damaged the driver for it on the board, fyi.

Quoted from millionpoints:

column 5 green-black (33-40)

Check if you have continuity from that column on the playfield back to the driver board.

#3 15 days ago

Link schematics in your first post as a courtesy -- put up a snipet of the switch matrix map... get more help that way.
-mof

1 week later
#4 8 days ago

Hey @zacaj and @mof, thanks so much for your input. I finally had some time to work on this...

I have attached a photo of the switch matrix. My apologies. I checked from all switches on column 5 back to the board for continuity and they all registered. Also, all the switches on that column were open. I must apologize again for misspeaking. The broken diode on the right kicker is on the coil, not the switch. all the diodes on the switches are in working order. I didn't realize that the switch test was different from the solenoid test in that it doesn't cycle through each switch rather than just showing the first switch showing closed. This also interests me, since from the switch matrix diagram, it looks like the first switch is 09? Also, I only checked the green/black wires for continuity, but should I also be looking for continuity on the return wires as well?

IMG_0394 (resized).jpg

#5 8 days ago
Quoted from millionpoints:

The broken diode on the right kicker is on the coil,

Did you test that diode with a multimeter?Is it the switches that are acting up or is it the coils?

#6 8 days ago
Quoted from millionpoints:

This also interests me, since from the switch matrix diagram, it looks like the first switch is 09?

Maybe it's one of the cabinet switches

#7 8 days ago
Quoted from zacaj:

Maybe it's one of the cabinet switches

Yeah could very well be...To the OP,What is the game doing now?Any update??

#8 6 days ago
Quoted from pinmike:

Yeah could very well be...To the OP,What is the game doing now?Any update??

As of right now, the game is playing the same way as described in my original post.

Quoted from pinmike:

Did you test that diode with a multimeter?Is it the switches that are acting up or is it the coils?

@pinmike So far, I have checked all of the diodes on all switches in question with a multimeter. They all seem to be in working order.

To answer your second question, I think it could be a combination? I want to believe its just the switches, since all the pop bumper coils are firing, but not scoring points. However, the right kicker is not firing OR scoring points.

Quoted from zacaj:

Maybe it's one of the cabinet switches

You are the man, @zacaj! I checked the cabinet switch diagram and switch 8 was the hi score reset. I switched it off and now test 3 shows '22', which is the GOR drop target standup. The diode on the switch works, and the switch is open. I wonder if the wiring on that drop target bank is the suspect? all three drop targets drop and reset well enough.

#9 6 days ago
Quoted from millionpoints:

the switch is open

Did you test it with your DMM?

#10 5 days ago
Quoted from zacaj:

Did you test it with your DMM?

I did, and when I went to inspect it after lifting the playfield, a wire from one of the leads came off! The switch tested good, so I re-soldered the wire, and it’s good to go. Switch test is blank now, but the magnet still sticks and all of column 5 is still out.

#11 5 days ago

Does the magnet switch stick in the switch test?

I would assume a board issue for the column 5 problem. Do you have any others you could swap?

Alternately, try removing the pins in the connectors for columns 5+6 and swap them. See if the switches in column 5 register correctly in column 6.

#12 2 days ago

@zacaj the magnet does still stick in test mode. Unfortunately I don’t have any extra boards to switch out. I have a Time warp with original boards, but gorgar has a rottendog 327 mpu. I’ll try swapping column 5+6 pin connectors this afternoon and report back. Really appreciate the help!

#13 2 days ago

If it sticks in switch test then I'd assume it's an actual physical problem with the switch. Take it apart and clean it.

If you still have the original gorgar roms you could swap your time warp boards in. Actually even with the time warp roms, you could still use the switch test without a problem. It's fine to have the time warp roms/boards in gorgar as long as you don't start a game. (even the it'd just get very confused)

Promoted items from the Pinside Marketplace
From: $ 9.00
$ 69.99
Playfield - Toys/Add-ons
Lighted Pinball Mods
$ 99.99
Playfield - Toys/Add-ons
Lighted Pinball Mods
$ 27.99
Eproms
Matt's Basement Arcade
$ 7.95
Apparel - Unisex
Pinball Wheezer
$ 40.99
Lighting - Interactive
Lee's Parts
$ 96.95
Cabinet - Shooter Rods
Super Skill Shot Shop
From: $ 100.00
Lighting - Interactive
Professor Pinball
$ 68.00
Playfield - Toys/Add-ons
ModFather Pinball Mods
$ 18.99
Eproms
Matt's Basement Arcade
From: $ 129.95
Lighting - Interactive
Hookedonpinball.com
From: $ 12.00
Cabinet - Other
Docquest Pinball Mods
$ 18.99
Eproms
Matt's Basement Arcade
$ 189.00
Displays
Boston Pinball Company
$ 9.99
Eproms
Matt's Basement Arcade
$ 29.99
Cabinet - Sound/Speakers
Lighted Pinball Mods
$ 100.00
Lighting - Interactive
Professor Pinball
$ 65.00
Cabinet - Decals
Flip N Out Pinball
$ 69.99
Playfield - Toys/Add-ons
Lighted Pinball Mods
$ 159.99
Lighting - Other
Lighted Pinball Mods
$ 45.99
Lighting - Interactive
Lee's Parts
$ 63.00

Reply

Wanna join the discussion? Sign up for a Pinside account, or log in if you already have an account.


Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside