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?

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

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

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

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

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?

Up

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?

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).jpg

20190723_185041 (resized).jpg

20190723_212256 (resized).jpg

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

Thanks.
How can I check it/solve it?

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

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

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

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

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

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?

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

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

Still no voice nor heartbeat :'-(

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.