Welcome, Guest. Please login or register.
November 21, 2024, 08:00:58 AM

Login with username, password and session length
* Home Help Arcade Login Register
.
+  Forum
|-+  NLG Members who host their own Repair Logs of Various Games.
| |-+  Channelmaniac's Arcadecomponents' Old School Repair Logs (Moderator: channelmaniac)
| | |-+  Techmo Games		 0 Members and 2 Guests are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: Techmo Games  (Read 12268 times)
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« on: September 16, 2008, 02:45:48 AM »
Model: Rygar
Symptom: Horrible audio quality

This is a non-JAMMA game and the owner supplied a homebrew JAMMA adapter to use with it.

Fixed a connection on the JAMMA adapter. It was using "Speaker +" and "Audio Ground" for the speaker connections instead of "Speaker +" and "Speaker -". The game's audio came up quite a bit but it was VERY noisy with lots of digital interference in the background.

Recapped the audio section of the board. One of the caps had leaked and the others were in horrible operating and physical shape. Replaced the 2 filter caps on the +5 lines on the top board. One had its solder pad lifted so it wasn't even in the circuit. Swapped out the 220uf @16v filter cap on the +12v line connecting to the final amplifier IC with a 470uf @16v cap.

The game still has some noise in the audio, but this is from the Yamaha ICs in the circuit and is also present on the MAME version of the game. The digital artifiact noise that was in the background is now fixed.
Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« Reply #1 on: August 07, 2011, 08:59:06 PM »
Model: Silkworm
Symptom: Dead

Board had a short between +5v and ground, causing the power supply to shut down. Removed incorrect mounting hardware that was causing the short and replaced it. Tested game.
« Last Edit: August 17, 2011, 12:27:02 AM by channelmaniac » Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« Reply #2 on: August 12, 2012, 03:07:13 PM »
Model: Final Star Force
Symptom: Dead

Game was stuck in watchdog and would flash garbage on the screen before rebooting. Replaced bad Work RAM and tested.
Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« Reply #3 on: September 03, 2013, 02:04:46 AM »
Model: Silkworm
Symptom: Single vertical line on screen

Board had a vertical line going from top to bottom of the screen, slightly left of center. Replaced bad DRAM chip at location B5 and tested.

Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
Pages: [1] Go Up Print 
« previous next »
Jump to:  

SimplePortal Classic 2.0.5

If you find this site helpful, Please Consider Making a small donation to help defray the cost of hosting and bandwidth.



Newlifegames.com ™    Newlifegames.net ™    Newlifegames.org ™
   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 - 2021


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.

NewLifeGames.net Web-Site is optimized for use with Fire-Fox and a minimum screen resolution of 1280x768 pixels.


Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
Loon Designed by Mystica
Updated by Runic Warrior
Page created in 0.072 seconds with 20 queries.