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Author Topic: Universal Games  (Read 4704 times)

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Offline channelmaniac

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  • Few things are better than fixing an old game...
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Universal Games
« on: May 04, 2014, 07:57:37 PM »
Model: Mr. Do's Castle
Symptom: Upgrade to NVRAM

Removed and reprogrammed ROMs 1 through 4 with the JROK code for adding the High Save Score feature. Removed 1 SRAM and replaced it with a socket and a customer supplied DS1220 NVRAM chip.

Board would not boot with the DS1220 in the socket. Installed a 9 pin 470 ohm resistor pack to tie the first 8 address lines high and tested successfully with the DS1220 in the socket.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

  • Surface mount soldering geek
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  • NLG Member 501 to 10,000 Posts
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  • Posts: 2472
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  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Universal Games
« Reply #1 on: May 04, 2014, 07:57:48 PM »
Model: Mr. Do
Symptom: No sync

Board had been modified to put separate H and V sync out. Removed 2 jumper wires and resoldered two cut chip pins to remove mod. Tested. board.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

  • Surface mount soldering geek
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  • NLG Member 501 to 10,000 Posts
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  • Posts: 2472
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  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Universal Games
« Reply #2 on: May 04, 2014, 07:58:01 PM »
Model: Cosmic Avenger
Symptom: Will not coin up

Boardset requires +5v on the coin inputs when idle and is detailed in the owner's manual wiring diagram. Either wire +5v straight to the switches or simply use a 1K ohm resistor on each coin switch input on the PC board to tie the inputs to +5v.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

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  • NLG Member 501 to 10,000 Posts
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  • Posts: 2472
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  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Universal Games
« Reply #3 on: November 21, 2015, 11:45:28 PM »
Model: Snapjack
Symptom: Dead

Board had physical damage - scraped traces and a missing crystal.

Replaced the 9.828MHz crystal and tested. Game was dead. Replaced 1 bad Program ROM and game booted, but the game played upside down and player graphics were garbled. Patched 4 gouged traces to fix upside down image and most of the player graphic issues. The player sprites were split and placed on wrong sections of the screen. Replaced a bad 2114 RAM to fix the player sprites and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

  • Surface mount soldering geek
  • Global NLG Site Moderator
  • NLG Member 501 to 10,000 Posts
  • *
  • Posts: 2472
  • Reputation Power: 174
  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Universal Games
« Reply #4 on: November 22, 2015, 02:04:27 PM »
Model: Space Panic
Symptom: Dead, missing parts

Board was parted out for the EPROMs.

Replaced 12 missing EPROMs and 9 electrolytic capacitors. Tested. Replaced missing board mounting hardware and standoffs. Retested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

  • Surface mount soldering geek
  • Global NLG Site Moderator
  • NLG Member 501 to 10,000 Posts
  • *
  • Posts: 2472
  • Reputation Power: 174
  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Universal Games
« Reply #5 on: November 27, 2015, 03:31:14 PM »
Model: Ladybug
Symptom: Dead.

Replaced 2 caps to fix the Power-on-Reset circuit. Board booted but had no sound and corrupt graphics. Replaced defective 74LS393 at R5 to fix the graphics corruption. Replaced LM324 op-amp, 10 capacitors, and the HA1388 amplifier IC to fix the audio amp circuit. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

  • Surface mount soldering geek
  • Global NLG Site Moderator
  • NLG Member 501 to 10,000 Posts
  • *
  • Posts: 2472
  • Reputation Power: 174
  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Universal Games
« Reply #6 on: January 24, 2018, 09:29:50 PM »
Model: Ladybug
Symptom: Maze (background) graphics corrupt

Checked the 2114 RAMs and found one with a dead data output. When shorted to the data pin next to it the display cleared up dramatically. Replaced bad RAM and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

  • Surface mount soldering geek
  • Global NLG Site Moderator
  • NLG Member 501 to 10,000 Posts
  • *
  • Posts: 2472
  • Reputation Power: 174
  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Universal Games
« Reply #7 on: December 12, 2020, 08:43:42 PM »
Model: Ladybug
Symptom: Dead. Nothing on screen.

Replaced a bad 74LS161 in the clock dividing circuit. One output pin plus the carry pin were stuck low. Replaced 2x 470uf and 4x 220uf capacitors on the CPU board to fix missing sound. Replaced a physically damaged 220uf cap on the video board. Tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

Offline channelmaniac

  • Surface mount soldering geek
  • Global NLG Site Moderator
  • NLG Member 501 to 10,000 Posts
  • *
  • Posts: 2472
  • Reputation Power: 174
  • channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!channelmaniac Is an-NLG GOD!
  • Few things are better than fixing an old game...
    • Arcadecomponents.com - Looking for hard to find chips?
Re: Universal Games
« Reply #8 on: August 19, 2021, 10:22:40 PM »
Model: Mr. Do
Symptom: Sparkling graphics

Replaced a bad graphics ROM and tested.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

 

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