(Topic ID: 300208)

System 80B Display Board Capacitor Question

By BleacherBum

36 days ago


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  • 14 posts
  • 6 Pinsiders participating
  • Latest reply 36 days ago by YeOldPinPlayer
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    #1 36 days ago

    I am hoping someone can share some knowledge.

    I recently obtained an unpopulated Gottlieb display board from The Pinball Resource (PBR). It is listed on PBR as a Gottlieb System 80B board. When I Compare it to the board in my System 80B pin it appears the same with the exception of a capacitor added at C7 (see attached photo).

    I followed the circuit from it where it enters at A4J1 to it’s end at the display glass . The circuit, as far as I can tell, is the same as the circuit from in the Gottlieb manual (Chicago Cubs Triple Play, CCTP). There in one exception that I see. That is a capacitor added between the incoming input from A4J1/#10) and Z2/pin 9.

    I highlighted the circuit on the board from PBR (see attached picture). The outgoing path on the PBR board from Z2/pin 8 to U2/pin 5 is the same as the the schematics for board CCTP A4 board.

    Since the CCTP schematics does not include C7, I am unsure of what capacitor could be used. If the board is populated with components per the CCTP manual, can C7 be left unpopulated? If not, can someone suggest a suitable capacitor?

    Thanks,
    Phil

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    #2 36 days ago

    ChrisHibler would be the man to ask about that. Might be good to add it to the Pinwiki, looks like an early revision photo is already there: https://www.pinwiki.com/wiki/index.php?title=Gottlieb_System_80#System_80B_2

    #4 36 days ago

    Thank you very much!

    #5 36 days ago

    BleacherBum Where did you obtain the 10941 and two 10939s for the panel?
    --
    Chris Hibler - CARGPB #31
    http://ChrisHiblerPinball.com/Contact ... for board repairs
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    #6 36 days ago
    Quoted from ChrisHibler:

    BleacherBum Where did you obtain the 10941 and two 10939s for the panel?
    --
    Chris Hibler - CARGPB #31
    http://ChrisHiblerPinball.com/Contact ... for board repairs
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    Looks like a few pinball suppliers have them in stock. Just google gottlieb and the chip numbers.

    #7 36 days ago

    Whoa! The 10941 is installed backwards!!!

    #8 36 days ago
    Quoted from G-P-E:

    Whoa! The 10941 is installed backwards!!!

    Good eye Ed. Hope the OP sees this before they power it up.

    #9 36 days ago

    where did you find the bottom nipple futobas?

    #10 36 days ago
    Quoted from ChrisHibler:

    BleacherBum Where did you obtain the 10941 and two 10939s for the panel?
    --
    Chris Hibler - CARGPB #31
    http://ChrisHiblerPinball.com/Contact ... for board repairs
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    marco have them

    #11 36 days ago

    Thanks Ed and YeOldPinPkayer for catching my mistake I guess I shouldn’t work late into and into the early morning hours.

    #12 36 days ago
    Quoted from ChrisHibler:

    BleacherBum Where did you obtain the 10941 and two 10939s for the panel?
    --
    Chris Hibler - CARGPB #31
    http://ChrisHiblerPinball.com/Contact ... for board repairs
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    Hi Chris,
    I don’t remember where I got the 10939 chips but, I got the 10941 from Ed (a couple years ago) he is out of them now. I did a quick search and found these vendors: ( there maybe more)
    flippers.com. List both the 10939 and 10941. https://flippers.com/catalog_oc/index.php?route=product/search&search=10941

    Marcospecalties lists both just search on the IC number: https://www.marcospecialties.com/control/main

    Arcade Chips only lists the 10941, https://arcadechips.com/advanced_search_result.php?search_in_description=1&keywords=10941&pfrom=&pto=&categories_id=&x=0&y=0

    #13 36 days ago
    Quoted from pinostalgia:

    where did you find the bottom nipple futobas?

    I do not remember where I got mine. I have had the stored away for awhile. These two vendors show them in stock.

    Action pinball lists them: http://www.actionpinball.com/parts.php?item=XO-840

    Marcospecialties also has them: https://www.marcospecialties.com/pinball-parts/GTBDIS20-T

    #14 36 days ago
    Quoted from BleacherBum:

    Thanks Ed and YeOldPinPkayer for catching my mistake I guess I shouldn’t work late into and into the early morning hours.

    Ed G-P-E caught it, I just sent a PM hoping it might reach you before you powered it up.

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