https://wiki.arcadeotaku.com/index.php?action=history&feed=atom&title=Gunforce_Repair_Logs 2026-05-19T06:34:45Z Revision history for this page on the wiki MediaWiki 1.42.1 https://wiki.arcadeotaku.com/index.php?title=Gunforce_Repair_Logs&diff=7891&oldid=prev 2012-09-23T03:33:24Z

<p>Created page with &quot;&#039;&#039;&#039;Repairer:&#039;&#039;&#039; [http://www.aussiearcade.com.au/member.php/3136-VectorGlow VectorGlow]&lt;br&gt; &#039;&#039;&#039;Forum Thread:&#039;&#039;&#039; [http://www.aussiearcade.com.au/showthread.php/23428-GunForce-Re...&quot;</p> <p><b>New page</b></p><div>&#039;&#039;&#039;Repairer:&#039;&#039;&#039; [http://www.aussiearcade.com.au/member.php/3136-VectorGlow VectorGlow]&lt;br&gt;<br /> &#039;&#039;&#039;Forum Thread:&#039;&#039;&#039; [http://www.aussiearcade.com.au/showthread.php/23428-GunForce-Repair-Log Gunforce PCB Repair]&lt;br&gt;<br /> &lt;br&gt;<br /> &#039;&#039;&#039;Symptom:&#039;&#039;&#039; On power up, board displays RAM NG 23 and during the game no sprites are visible&lt;br&gt;<br /> &#039;&#039;&#039;Diagnosis:&#039;&#039;&#039; Found that twiddling the jumper JP3 on the top board caused the sprites to briefly appear and disappear, this was caused by corrosion on the jumper. However, the sprites were then corrupted and the wrong colours – piggy-backing a good 6116 on the RAM at IC43 on the top board (this is obviously the ‘23’ as referred to by the self test) caused the sprites to appear whole but the wrong colours.&lt;br&gt;<br /> &#039;&#039;&#039;Cure:&#039;&#039;&#039; Removed corrosion from JP3, replaced 6116 RAM at IC43. Colour problem caused by some mashed and shorted pins on custom at GA22 – pins 160 and down about 4 or 5&lt;br&gt;<br /> &lt;br&gt;<br /> &#039;&#039;&#039;Symptom:&#039;&#039;&#039; RAM NG 2 3 4 5 6 and some flickering garbage&lt;br&gt;<br /> &#039;&#039;&#039;Cure:&#039;&#039;&#039; Bad connection on pin 109 on the custom GA23 on the lower board&lt;br&gt;<br /> &lt;br&gt;<br /> &#039;&#039;&#039;Repair Logs converted to wiki format by Brad from [http://www.aussiearcade.com.au Aussie Arcade]&#039;&#039;&#039;.<br /> <br /> [[Category:Repair Logs]]</div>

Davewellington