New Life Games LLC
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length

News:

Welcome to the NewLifeGames.com message forum! 

 


NLG Site Navigation Menu


Archives of old posts can be found at...... Newlifegames.net/nlg/

Author Topic: Stern Games  (Read 4961 times)

0 Members and 1 Guest are viewing this topic.

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?
Stern Games
« on: May 04, 2014, 08:23:27 PM »
Model: The End
Sympom: Slows down then dies. No sound.

Odd symptom! Checked the clock signal and found it did slow down before the game died. Replaced the bad MB420P IC dividing the clock with a 7474. Clock signal was good yet the CPU clock was still bad. Replaced the 74LS367 buffering the CPU clock to fix slowness issue. Replaced a 1k resistor tying BUSREQ* high to fix the dying issue. Replaced the AY-3-8910 IC and 2 electrolytic capacitors in the sound section to fix the audio issues. 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: Stern Games
« Reply #1 on: May 04, 2014, 08:23:43 PM »
Model: Super Cobra
Symptom: Digital noise in audio output

Installed missing .1uf, .01uf, and 47uf capacitors on the audio output section of the 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: Stern Games
« Reply #2 on: April 07, 2015, 08:00:59 PM »
Model: Anteater
Symptom: Sounds like a helicopter

Boardset made no sounds other than helicopter like noise.

Replaced bad ROM at 5C on the sound board and reattached loose patch wire on the bottom 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: Stern Games
« Reply #3 on: February 09, 2016, 06:15:32 PM »
Model: Star Jacker
Symptom: Dead

Game is Stern licensed, hardware is Sega

Cleaned corrosion from every socketed chip's pins. Replaced bad Fujitsu 74LS86 buffering the video sync output. Replaced a Fujitsu 74LS139 in the address decoding circuit and 2 Fujitsu 74LS244 chips buffering the CPU address bus, and the CPU socket. Board was still dead.

Replaced a 74S04 in the clock circuit and a 74LS157 to get IC101 and IC102 to test properly with a Fluke 9010A. Board was still dead but came to life when all DIP switches were turned off. Replaced 2 74LS125 ICs gating the DIP switches and board would boot, but had improper sprites, no sound, and would crash. Replaced the other 2 74LS125 ICs gating the DIP switches to fix the crashing. Replaced a bad 74LS04 to fix the missing sound.

Replaced a bad 74S175, 2 corroded EPROM sockets, and 2 2016-10 SRAMs in the Object RAM section to fix the scrambled sprites. Game plays but sprites are pulsing in brightness. Replaced the 4016 SRAM in the video output section to fix the pulsing issue, but the game has red objects and garbage showing outside the playfield.

Replaced bad 74S175 in the video output section to fix the objects and garbage showing outside the playfield.

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: Stern Games
« Reply #4 on: September 22, 2018, 10:51:24 AM »
Model: Scramble
Symptom: Buzzing from speaker

Sound CPU was dead, but had /RESET and clock. Tested the ROMs OK and found one bad 2114 RAM Chip. Replaced the bad RAM and the other RAM chip that was too slow. Powered up the game board and heard some sputtering sounds while playing. Checked the AY-3-8910 chips and found one that was dead and the other had no 5v. Replaced 2 40-pin sockets and the bad AY-3-8910 IC 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: Stern Games
« Reply #5 on: April 22, 2020, 09:19:44 PM »
Model: Tutankham
Symptom: Dead

Cleaned the edge connector and replaced a bad 082 custom to allow the game to boot to the game, but with garbage on the screen and lockups. Replaced a chattering 4116 DRAM at 12B to fix the garbage and a 4116 DRAM with stuck outputs at 13A to fix lines on the screen. Cleaned the legs on the Program ROMs and replaced their sockets to fix the lockups. Replaced 2 1000uf caps on the top board and tested.
« Last Edit: April 22, 2020, 11:18:11 PM by channelmaniac »
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: Stern Games
« Reply #6 on: January 02, 2022, 10:38:15 PM »
Model: Lost Tomb
Symptom: Dead. Garbage on screen.

Reprogrammed 2 ROMs and replaced 5 defective ROMs and an 8216 bus transceiver on the CPU/Video board. Reprogrammed 2 ROMs and replaced a bad Z80, 8255, and an AY-3-8910 chip on the sound PCB. The sound CPU was dead, one 8255 wouldn't read/write to the ports properly, and one of the sound chips had a dead I/O port and wouldn't receive commands from the main CPU for the sound CPU.

Note: This PCB looks like it can use the standard Konami to JAMMA adapter, but the controls are mapped differently. It requires its own adapter.

Note: If you have a conversion PCB with all the jumper wires, that version takes -5v for the audio section, contrary to what the manual and wiring diagram show. The schematic does not show the 741 op-amp present on the converted game board version that requires the -5v.
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com

 

Cell Phone and Pad Mode

imode wap wap2

NLG Archives

Archives @ newlifegames.net Wayback Machine

Contact Us

NLG Shop 928 754-4147 Email Us 1788 Highway 95 30 BHC City AZ 86442
If you find this site helpful, please consider becoming a Contributing NLG Member with a monthly subscription to help cover the cost of pizza, coffee, aspirin, hosting, and bandwidth.
Contributing Members: get unlimited personal messages, can save topics and replies as drafts,
can post to the Classified ads, get unlimited access to the downloads, and also get this minty badge:



**Subscription Link** (Click Here) **Subscription Link**



           
If you would rather remain anonymous Thank You or just want to help support the site, please use this "make a donation" button:




From your entire NLG staff, thank you for supporting NLG.


New Life Games LLC 1788 HIGHWAY 95 UNIT 30 BULLHEAD CITY AZ 86442




Newlifegames.com     Newlifegames.net     Newlifegames.org

Newlifegame.com     Newlifegame.net     Newlifegame.org    Newlifegames.us

   New Life Games     NewLifeGames  NLG

 We Bring new Life to old Games    1-888-NLG-SLOTS

Are all Copyright and Trademarks of New Life Games LLC 1992 - 2022


FAIR USE NOTICE:



This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner.
We make such material available in an effort to advance awareness and understanding of the issues involved.
We believe this constitutes a fair use of any such copyrighted material as provided for in section 107 of the US Copyright Law.
In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those
who have expressed a prior interest in receiving the included information for research and educational purposes.

For more information please visit: http://www.law.cornell.edu/uscode/17/107.shtml
If you wish to use copyrighted material from this site for purposes of your own that go beyond fair use,
you must obtain permission directly from the copyright owner.




The NewLifeGames.com website is optimized for use with Firefox and a minimum screen resolution of 1600 x 900 pixels.

SimplePortal 2.3.5 © 2008-2012, SimplePortal