(Topic ID: 246938)

Gorgar Sound issues


By Nihonmasa

1 year ago



Topic Stats

  • 33 posts
  • 6 Pinsiders participating
  • Latest reply 1 year ago by pincoder
  • Topic is favorited by 1 Pinsider

You

Linked Games

Topic Gallery

There have been 8 images uploaded to this topic. (View topic image gallery).

37fc94f8fc8a7522557375ee4ac8e1d6696199da (resized).jpg
4ac6893e8e99d650fc4bdbb6d7e10b8d1c7f2d34 (resized).jpg
Screenshot_20190726-232833_Drive (resized).jpg
snd 1 (resized).jpg
20190723_212259 (resized).jpg
20190723_212256 (resized).jpg
20190723_185041 (resized).jpg
20190710_133829 (resized).jpg

#1 1 year ago

Hi guys,

Trying to revive a Gorgar I got sometime ago.
It is having the 1496 boot issue. not going past this.

Tried the power force boot, no change. No corrosion on the boards.
Sound board works fine through the test switch.

Recapped the Power supply, same issue.

here are the value I get on the test points:
TP1 9.58 VDC
TP2 3.97 VDC
TP3 3.88 VDC
TP4 4.8 VDC
TP5 4.84 VDC
TP6 2.36 VDC
TP7 4.84 VDC
TP8 4.91 VDC
TP9 5.03 VDC

Any idea?
Dead ram for sure?

#2 1 year ago

I also spotted this below the playfield which does not look factory made...
Anyone knows what are the correct values for those resistances?

20190710_133829 (resized).jpg
#3 1 year ago

have you checked the header connector between cpu and driver board?

#4 1 year ago
Quoted from Nihonmasa:

I also spotted this below the playfield which does not look factory made...
Anyone knows what are the correct values for those resistances?

https://pinside.com/pinball/forum/topic/gorgar-snake-put-flashers-stay-on#post-5055144

#5 1 year ago

Bscokid: ok so the left one is 330 ohms, thx!

Bax1: yep, pulled it out to reflow everything but no luck.

#6 1 year ago

So when you say it give boot error 1496, you mean it is booting into audit mode, and will not go into game over mode? I know it is a dumb question, but have you tried cycling the power several times with the coin door open?

Otherwise you may be correct, bad ram will prevent the machine from booting into game over mode.

#7 1 year ago

Yep, not going to game over, and yep I tried the cycling, and the factory restore, same stuff.

Ok will order the ram and report afterwards

1 week later
#8 1 year ago

Hi guys,

So I got the part, and it was a dead CMOS ram indeed!
Gorgar is now booting

Have sound issues though; no heartbeat during play and no Gorgar speech. Sound effects are ok.
When I push the test button on the sound board => I hear Gorgar speaking just fine, but nothing in play.
I don't have any heartbeat as well during play, but in the menu (#35) it is clearly ON (01).

Anyone knows what I should check?

#10 1 year ago

So, I made some troubleshooting.
Checked all roms, all connections on the Sound Board, reflowed all pins => still the same.

Still all sounds and speech good with the sound board test button.

When I tried through the test mode, on tests 02, I got the following with nothing reacting at all:
Tests 6,7,8,13,14,15,16,22

I reckon there might be an issue with the driver board?

#11 1 year ago

Changed the caps on the sound board, no change.
Checked the bottom left connector on driver board, all contacts and continuity are good.
All associated transistors seem ok, same with resistors.

20190723_212259 (resized).jpg20190723_185041 (resized).jpg20190723_212256 (resized).jpg
#12 1 year ago

Stuck at this point. Don't know what else to look at, don't have another system 6 for swap testing.

#13 1 year ago
Quoted from Nihonmasa:

Stuck at this point. Don't know what else to look at, don't have another system 6 for swap testing.

Signal input circuitry locked up on sound board.

#14 1 year ago

Thanks.
How can I check it/solve it?

#15 1 year ago
Quoted from Nihonmasa:

Thanks.
How can I check it/solve it?

Momentarily ground pins where there is a wire connection (outlined in blue) a working sound board will produce sounds.
only one input that's shorted will cancel other inputs - no sounds

snd 1 (resized).jpg
#16 1 year ago

Thanks, just tried.
Though I did not get any voice, each pin triggered a different sound FX

#17 1 year ago
Quoted from Nihonmasa:

Thanks, just tried.
Though I did not get any voice, each pin triggered a different sound FX

The pins need to be grounded in a combination for speech call.
Getting sounds is good. driverboard fault suspect
connect it back up and in game over mode ground the bottom row transistors one at a time 9 to 12 to confirm sounds again.

#18 1 year ago
Quoted from PINTEC:

The pins need to be grounded in a combination for speech call.
Getting sounds is good. driverboard fault suspect
connect it back up and in game over mode ground the bottom row transistors on the driver board one at a time 9 to 12 to confirm sounds again.

#19 1 year ago

Ok, right leg is it?

You are referring to Q9 to Q12 in the attached schematic, right?

In any case, thanks a lot for your help and hints
Screenshot_20190726-232833_Drive (resized).jpg

#20 1 year ago

9-13 sound transistors

4ac6893e8e99d650fc4bdbb6d7e10b8d1c7f2d34 (resized).jpg
#21 1 year ago

Done, each one of them started a sound FX when triggered (middle pin to ground)

#22 1 year ago
Quoted from Nihonmasa:

Done, each one of them started a sound FX when triggered (middle pin to ground)

driverboard isn't able to trigger the sounds in solenoid test. fault on driverboard

#23 1 year ago

Think we have a misunderstanding

My post above said "When I tried through the test mode, on tests 02, I got the following with nothing reacting at all:
Tests 6,7,8,13,14,15,16,22"

=> 9 to 12 are working in test mode and triggering the sounds

#24 1 year ago
Quoted from Nihonmasa:

Think we have a misunderstanding
My post above said "When I tried through the test mode, on tests 02, I got the following with nothing reacting at all:
Tests 6,7,8,13,14,15,16,22"
=> 9 to 12 are working in test mode and triggering the sounds

You mentioned the sound and speech worked when the test button pressed on sound board.
so no solenoids fire but the sounds work?

#25 1 year ago
Quoted from PINTEC:

You mentioned the sound and speech worked when the test button pressed on sound board.
so no solenoids fire but the sounds work?

Test button on sound board=> all sounds are ok, including voices
When going on solenoid test => 9 to 12 do trigger sounds. Did not get any voice.

When in play: no heartbeat, no voice, only sound FX

#26 1 year ago
Quoted from Nihonmasa:

Test button on sound board=> all sounds are ok, including voices
When going on solenoid test => 9 to 12 do trigger sounds. Did not get any voice.
When in play: no heartbeat, no voice, only sound FX

1 transistor isn't functioning even if all sounds are heard in test the cpu tells the 9-13 outputs to turn more than one of the 5 transistors on in a combination to call up speech so next is pause each position 9-13 and check that there is a pulse for all five outputs, at least one is definitely missing

#27 1 year ago

Yep, 13 is not doing anything. So I need to replace both Q38 and Q39 I guess.
Will check of I have some in my stock.

edit: retested, and indeed Nr 13 is not triggering in test mode, but does activate a sound when I ground the center plug.
Don't have a TIP120 to change it; you think it is related to the TIP 120?
Is it also causing the absenc eof heartbeats?

#28 1 year ago

Sound output trigger at 13 must produce a signal so normal heartbeat/speech will return.

Quoted from Nihonmasa:

Yep, 13 is not doing anything. So I need to replace both Q38 and Q39 I guess.
Will check of I have some in my stock.
edit: retested, and indeed Nr 13 is not triggering in test mode, but does activate a sound when I ground the center plug.
Don't have a TIP120 to change it; you think it is related to the TIP 120?
Is it also causing the absenc eof heartbeats?

#29 1 year ago

Awesome, thanks for the feedback! Have ordered a TIP120 to repair this

1 week later
#30 1 year ago

So, TIP120 has been changed.
13 is now activating when I test manually but still nothing in test mode.

Still no voice nor heartbeat :'-(

#31 1 year ago
Quoted from Nihonmasa:

So, TIP120 has been changed.
13 is now activating when I test manually but still nothing in test mode.
Still no voice nor heartbeat :'-(

Diver fault continues:
Follow the signals blue arrows with logic probe in test for pulses at the locations.
Change 2n4401 circled.

37fc94f8fc8a7522557375ee4ac8e1d6696199da (resized).jpg
#32 1 year ago

Changed with a brand new 4401 and I had strange behaviours happening.
Put back the old one: back to normal (except voices of course).

For the other stuff, I have ordered a logic probe and will resume when it arrives.

1 month later
#33 1 year ago

Is this still an issue? You might want to try these test ROMs: http://pincoder.ca specifically, the 11-sounds ROM will help you diagnose problems..

Promoted items from the Pinside Marketplace
From: $ 20.00
Cabinet - Other
Rock Custom Pinball
1,850 (OBO)
Sale Pending!
Kingston, NY
$ 100.00
Gameroom - Decorations
The Flipper Room
$ 12.00
Cabinet - Other
Siegecraft Electronics
From: $ 9.00
From: $ 40.00
Cabinet - Other
Rock Custom Pinball
From: $ 1.00
Playfield - Other
Rocket City Pinball
$ 10.00
Playfield - Protection
UpKick Pinball
$ 799.00
Flipper Parts
Mircoplayfields
From: $ 18.00
Apparel - Men
Pinside Shop
$ 40.00
Gameroom - Decorations
The Flipper Room
$ 14.00
Electronics
Yorktown Arcade Supply
$ 50.00
$ 11.00
2,450 (OBO)
Machine - For Sale
Hampshire, IL

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