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A two-legged, big-nosed, orange creature jumps diagonally around on a pyramid, changing the color of the blocks he lands on. Avoid most moving objects and characters while luring Coily, the snake, to his demise by jumping off the edge of the pyramid onto one of the flying disks. The game has nine levels of four r

I got this from a trade with a local collector. The cabinet was solid, artwork had its shares of cuts and scratches and the game was semi-working. The game displayed the graphics upside-down and a verticle split in the screen. It produced the "I'm turned on" voice upon power up and made a tone when the test button was pushed on the sound board.

I noticed that the game would reset if the power cord was wiggled so I replaced that with a new one. I also found out that the game would reset when the back door was closed. While the door was open I wiggled all the connections one at a time and was able to recreate the problem. Closer inspection of the filter board revealed several cracked solder joints.

I reflowed and added solder to all the header pins on the filter board. I also inspected the header pin solder joints on power supply board which looked good as well as reseating all socketed chips on the CPU board. I replaced the board and powered the game on and it seemed more stable but still had the video issues. I was able to wiggle the connections and close the door without it reseting.

Next I inspected the power supply board. All power LEDs were on so that was a plus. I checked the voltages on P3 (using pin 5 as ground) and had the following results:

  • Pin1 13.7v (should be 20v)
  • Pin3 -11.7v (should be -12v)
  • Pin4 12.2v (should be 12v)
  • Pin6 32.0v (should be 30v)

Voltages at P4 (using pin 1 as ground):

  • Pin16 5.3v (should be 5v)

Voltages at P1 (using pin 4 as ground):

  • Pin1 11.65vv (should be 11.5v)
  • Pin1 11.65vv (should be 11.5v)

I also tested the resistors with the following results:

  • R12 102 ohm (should be 100 ohm)
  • R13 13.6 ohm (should be 12 ohm) ***burnt***
  • R14 14.3 ohm (should be 12 ohm)

I pulled the CPU board to inspect it closer and noticed that the 3 74LS377 chips at A8, A9 and A10 where missing. I checked the schematics and seems that they control veritcle flip and horizontal flop. I posting to KLOV repair forums confirmed that this could be the root of my video issues.

A parts order to Mouser was put in for the 74LS377s and some other parts.

Update 16MAY09...

Well I put sockets and 74LS377's on the CPU and the screen is now right-side-up but still split..

I recapped the monitor to no avail. There is an arcade party at a fellow collector's this coming weekend and he offered to take a look at the boards and monitor.

More to follow!!!!!!!


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