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(Updated 30-jan-2005)

This machine we have bought from a collector in Belgium in the Spring of 2003 (from; Pascal), thanks!

JarJar bought it not-working (error RAM 6) and I'm still trying to fix it (sounds).
I had no experience in repairing game-PCB's, but with the help of my little oscilloscope (15Mhz), service manual, schematics and two great guys (Thomas Rahbar , Jack Richards) I was able to get it to function enough to play it!

Best modification I did was to disable the sense-lines that (I think) has fried the boards in the first place!

See pictures + repair-log below.

The coin-door is missing. Perhaps somebody on the net can help me find one?
! ANY HELP in repairing this arcade-unit is VERY welcome !

before: After:

Repaired log:
February 2003: Ram 6 is a high speed 1kx4 SRAM (2149H-3) and I quickly found out that these are hard to find. So I made a little PCB with a 32kx8 high speed SRAM from a old 486 main board to replace the 2149H-3. But to be sure I removed both 2149H-3 chips from the board and put sockets in place. After I swapped the 2149H-3 I got the message RAM 7. That is good, so the problem is indeed this chip. I popped in the PCB I made earlier and what I got was a messy screen and lots of garbage coming out of the speakers.
March 2003: After studying the schematics I pulled out my oscilloscope and start measuring on the PCB. Some how I messed up the little PCB I made, blowing out the Z80A-cpu :-(. In my garden shed I have a huge amount of wasted PCB's from the late 70's early 80's, a real treasure for finding obsolete parts. After a few hours looking through them I found a MSX-board with Z80A and some AM9124 chips. I removed the 32kx8 PCB, replaced the Z80A and got the RAM 6 back on the screen :-). The internet tells me that AM9124 chips are 1kx8 SRAMS, so I tried my luck, but wasn't. I returned to my shed, finding a IBM harddisk-controller with two 2149-35 chips
April 2004: Now I'm puzzled. When I put in the IBM rams, I got a error RAM 0. Looked it up in the manual and replaced the corresponding chip. But the error RAM 0 did not go away. I did some swapping around with the good 2149H-3 I have and found out that I get the error RAM 6 or RAM 7 back. Perhaps the problem is only this @$#% 2149H-3 after all? Next action is to find me some good replacement parts for this high-speed SRAM. Until then, I have no update. Perhaps somebody can help?
Jan 2005: Well, to cut a long story short, I have send my boards to Thomas Rahbar (USA) for repairs. After 6 month I got them back with a swapped video-board. The game now started, but sound was missing and graphics were messed-up. Jack Richards helped me getting on the right track in the sound-circuit. I needed to replace a fast video-ram and all op-amps. Graphics are fixed now and I do have sound.  The problem with sound is that all tunes are missing tones. Engine sound is ok. For now I leave it like this. If somebody has help, drop me a line.

Some pictures:

 
Testing inside the cabinet is not handy.          So I build my own test-bench!


RAM-error                 Bad video-ram (fast)                     bad eprom                     bad eprom