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(Topic ID: 90759)

Gottlieb Countdown


By conserx

6 years ago



Topic Stats

  • 34 posts
  • 11 Pinsiders participating
  • Latest reply 6 years ago by newmantjn
  • Topic is favorited by 3 Pinsiders

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#15 6 years ago

For me.. first video is (probably) regular boot up, if you have "click-click" on a playfield G.I. (&relay) possibility is better.
(in this solution, I suspect on DIP switches problems for credit display, and maybe some others functions)

The second video indicates (expected ? ) problems with (only display's ?!?? ) connectors

Question...after boot-up (first one is there any "high score to date" numbers on displays ?

Starting a game... are you 100% shure in additionally wiring ?
(BTW, did you check "test mode" ? )

Greetings from Croatia

#18 6 years ago

Did you checked diodes on bottom of cabinet ?

(did you have "click-click" (relay) on boot-on, and playfield G.I. off-on?

Have you a logic probe ? (I guess you have DMM )

And, what's about soldering skills, for removing some integrated circuits ?

(are you DOUBLE-checked connector pins on J6 ?!? )

#23 6 years ago
Quoted from conserx:

I do hear the click-click of the relays on boot

Great,it is VERY important ( confirms proper boot-up )

Quoted from conserx:

Soldering skills aren't a problem

OK, if you have experience, just replace Z9 (7405 ) and Z8 (7404)

( Z9 is at left lower corner,above connector J7,and Z8 is another )

edit:
Z9 is "first on list"..so you can try after replacing Z9 only

#26 6 years ago
Quoted from woz:

Please post a closeup of the lower left corner where the chips were replaced.

+1

(both sides...component & solder side)

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