According to the manual this is a 2114 at location 6E, which I replaced but continued to get the same message. Board booted with Rom OK message, put game in test mode and it reported bad “Rom 5H”. First, I replaced all the mask roms as well as a few sockets that looked suspect. Rom 1 – Rom OK Flashing (2/18/14) – figured this was a dodgy socket or bad mask rom. Replaced original cables with SCSI cables and board works fine. Started pushing on ribbon cables and it would clear up a little, but not completely. Board now passed self test but played with color issues and some graphic issues. Put game in test mode and it reported bad OH ram, which led me to replace 6A. Top board known to be good, used Fluke to test Roms, all of them checked out okay (figured they’d would).
Rom OK Messsage (9/24/15) – Board wouldn’t pass self test. Installed another Z-80 and the board worked fine, so the original Z-80 was bad. Connected board to Fluke 9010a to test roms and ram and the board came right up. Garbage on Boot (9/24/15) – Immediately noticed Ram 6A socket was missing plastic piece, so I replaced and installed a 2114 ram, but no change. Board then reported ram “0H” error and failed ram test at 8000-83FF with Fluke which pointed me to 2114 at 6A based on my notes. Rom 2 Error (9/24/15) – Reported Rom 2 error on boot, used Fluke to confirm rom was bad (it was) and replaced the rom. Burned new set of roms, installed them and board worked. Garbage on Boot (1/23/17) – Not much sign of life, a few sockets were replaced at some point. Replacing 74LS158 at 1P fixed the problem. I should have spent more time looking at inputs, after further digging found that outputs at 74LS158 which eventually feeds 1P were dead. Outputs at 74LS273 at 1P didn’t look right, replaced it, but no change. Sound Issues (1/25/17) – Board booted and played, but only the crash sound was running, nothing else.
Found 10E (93415 Ram) was stuck high at pin 7. Playfield Missing (9/24/15) – Right side of screen was okay, but the complete maze/playfield was not visible. Noticed output on 9F at pin 15 was stuck low. Vertical Lines, no Playfield (9/24/15) – Initially suspected a bad ram, this board had 2147 ram installed, thought 9E might be the problem, but no changed. Swapped them back and video issue cleared up quite a bit, but now a vertical line of cars instead of one car each. Then realized that 8M and 8P were swapped and in the wrong place. Swapped at socket on 9R after confirming 9R was okay, but change. Random garbage on Screen/Video Issues (9/24/15) – Discovered that 9P, pin 3 was stuck low, replaced that, but no change. Performing these steps first seems to solve a lot of problems with the boards I've worked on, similar to other games that use the masked proms where they tend to rust and become very brittle. Clean legs on socketed ICs on video board.Use Fluke 9010a to test roms and 2114 ram on the CPU board (bottom board).Replace all masked roms with 2532 roms, just good preventative maintenance as the originals fall apart.Inspect board for any damaged traces, etc.Repair procedure (Stuff that I do before really going much further): I've fixed a few of these sets over the years, some tips, ramblings and previous repair logs, enjoy! I've always liked this game, something about the Namco designed games that I really like and this is one of them.
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Our aim is to provide you with the latest free online games, freeware and download games, without the need to buy games.Picked up a Rally-X boardset last week, spent some time getting it going and a few others from the dead pile. If you looking for related topics, check the Rally game on the rights side of this game box.Īrcadebomb (founded 2005) the free arcade where you can play free online games, arcade games and some shareware games. Try this flash game if you are looking for more then our 1000 web arcade games on our internet gaming site. This 100x100 arcade game shows random online flash games and Rally to play online. Race your laps as fast as possible, the original turbo spirit is here!ĭrive your big ass truck over those tiny annoying vehicles.
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