Quoted from TheCnyPinGuy:Hello All
Game is a LAH
I am getting 4.9 / 4.8 on the 5vdc
And 14.8 on the 12vdc
This board was just fully recalled and a new BR 1 installed
Now I have read through the pages and disconnected the sound board and cpu
No Change in my under 5vdc rating
This game does play well but will reset at random and I assume due to the voltage shutting down the cpu and resetting it
Any idea what else I can check/replace to bring up my 5vdc ?
Thanks
James
Where are you taking your measurement? Measure AC into bridge, DC directly out of bridge, and DC at connector for the logic power. This will give us more of a picture of the logic voltage supply.
It's not terribly low, and other things can cause resets...make sure you've checked this from the tech pages:
Random Game Resets On JP, LAH and TftC.
During game play, the games Jurassic Park, Last Action Hero and Tales from the Crypt randomly reset. This occurs because the +5 volt line is shorting against the ground backbox metal plate. This grounding plate lies behind all of the printed circuit boards mounted inside the backbox. The metal plate can bow, causing it to intermittently short against one of the backbox circuit boards. This will cause the game to reset. To fix this problem, remove all the circuit boards (label the connectors!), and remount the metal backbox grounding plate to remove the bow. Another solution is to remove the sound board and affix an insulting material to the metal plate directly behind the sound board at connector CN2. This will insulate the metal grounding plate from the sound board (which is the board most affected by this bowing metal plate). Make sure the insulating material is non-conductive, and thick enough so it cannot be perforated. This problem was discussed in service bulletin number 55.