Rom tested fine in burner, but didn’t work in the board. Board had a fresh set of roms, swapping them into a working board, found rom at 7D to be bad. Also a small horizontal line was on the title screen near the middle left hand-side. Sprites had horizontal lines (2/3/17) – Board looked close, but the sprites had horizontal lines running through them. Used some freeze spray to hit the chips and after spraying 2148 ram at 6R the picture would clear up again. Replaced LM724 at 8K and that fixed the problem.īoard had Mario Heads and Bottom on Screen (2/6/17) - Kind of an odd problem, it would boot up fine, after a couple minutes Mario's head and bottom would appear on the screen in the four corners (see picture). One background sound during intro sequence out of pitch (after DK thumps) – recapped entire sound section, but no change. Used Fluke 9010a to test roms and found program roms at 5C and 5F where bad. Garbage on Screen (1/31/17) – Fairly clean CPU boardset, complete, but boots to garbage. Removed the socket, cleaned up the area as best I could and installed a new socket, board now works. Original Z-80 socket was replaced and the replacement socket didn’t look very high quality and poorly installed. Garbage on Screen (1/31/17) – CPU boardset booted to garbage, went to pull Z-80 and test roms with Fluke 9010a. Pulled Q1 and it tested bad, replacing C1815 at Q1 fixed the problem. Noticed R1 was burnt, replaced it, no change. Replaced 74LS04 at 6J to fix the problem.Īll Low Sounds (2/7/17) – Sounds were present, but very low. Grabbed the logic probe and starting probing around before the 8035 and found pin 10 at 74LS04 at 6J was stuck low (it should have been high). Recapped the sound section just in case, but no change. All sound transistors tested good, swapped out the 8035 and sound rom, no change. Initially thought this was a bad transistor as that seems to be common issue when sounds are stuck “on”. Thump Sound Constantly On, No Music (2/7/17) – The “thump” sound from Donkey Kong jumping at the beginning of stage was constantly playing, no music was present. Was able to remove solder from hole, run a small metal lead through the hole and solder it to the leg to fix the problem. Looked like this was from the factory, the jump sound probably never worked properly. The leg was bent and didn’t make it through the solder hole. Closer inspection showed pin 9 of 8L was never soldered properly through the board. Jump Sound Off Pitch (2/7/17) – Jump sound was out of pitch, just not right. Replacing 4020 IC at 6L fixed the problem, thanks to Scott Brasington for documenting this repair online. Replaced caps in jump section as well as some other caps in sound section, but no change. Didn’t notice it had another sound issue until further play testing. Jump Sound off Pitch, No Walk Sound (2/8/17) – This was a board I just fixed with the constantly thumping sound. Also check the pots on the video boards as they tend to crack if the board has been banged around, the board will look out of sync if the pots are bad. Boards with bad roms and/or a bad socket are fairly common in my experience and the first thing you should look at. Not included in these repairs are a few boards that had bad roms and/or bad rom sockets. NOTE: This Kit requires a monitor with either a VGA or CGA Connection, otherwise a VGA to HDMI Adapter can be purchased separately.Spent a bit of time going through some Donkey Kong and DK Jr. It is recommended to use a switching joystick to enhance game play. Uses standard arcade power supply or AT PC power supply (with standard 4-pin molex connector, the same used for hard & cd drives).Ability to save 'High Score', even after the power is turned off!.Supports 2 Trackball and/or Joystick Controls.Each game is fully customizable (Difficulty, Game Speed, Number of Lives, etc).Plug it and play on any vertically mounted JAMMA.Supports 2 player cocktail or upright cabinets with vertically mounted monitors.This will save the top score even after the power is turned off! The newest and best improvement of the 60-in-1 PCB is the ability to now use a trackball and play Millipede/Centipede as they were meant to be played! Another great feature is the all-new High Score saver.
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