Hi all
This is more of a repair log than a plea for help... having picked up a Maverick project machine in December from one of our well known members as p/x for a machine I sold to him.
It come with several known issues broken/loose coil stop under the ramp and some issues with the three opto switches for the multiball entrance and locks also a couple of the drop targets were broken
The coil was simple to repair just required a new bracket, the optos were a different story Sega use ultra bright leds instead of infra red ones as bally/Williams use, I ordered a couple of spares from one of our suppliers but I couldn't make them work very well they were near impossible to line up the sender to the receiver.
The small boards are unobtainable so searching for other answers I came across a tip in using ultra bright orange leds instead of normal red ones luckily I had some left over from a previous project
fitting these made a big difference to the sensitivity and were much easier to set up.
The paddle wheel entrance opto has been an issue with Data East/Sega from day one as it was sited next to a VUK causing vibration's to upset the switch board position. Sega come up with an alternative switch to fit, a magnetic reed switch instead of the opto I managed to locate one in this country well pleased in that.
With all these problems sorted I tried a couple of games and had several switch faults appeared I did not think much of these at this time.
It was apparent that this machine had sat for along time unloved and in the sun as most of the playfield plastics had faded badly and had gone very brittle similar with the rubbers they just fell off, so a new set of plastics were sourced as well all new drop targets,a rubber set came with the machine.
Parts arrived and were duly fitted now play testing began the switch faults were popping up all across the matrix one fault was found with a drop target wire chaffing on a GI socket that cured 4 switch's on one row. During play when operating flippers phantom switch closures were happening
on rows 3-8 from what I could work out but they were all intermittent and they all stemmed from the use of the flippers, mysterious.
Reading up using Marvins guide and Pinwiki ,I tested the cpu board by shorting across the send and receive connectors CN8 - CN10 these all tested ok all rows all columns, so this ruled out the cpu board, so I turned to the flipper board this all appeared ok nothing stood out except it was not the board that the manual stated it should be, but it was factory as the warranty sticker had the same serial number as the rest of the boards. A service bulletin from Sega detailed revisions to the board that should be carried out to upgrade it to the correct revision for this machine this was done and still phantom closures happened.
Now to start on the only other thing the miles of wiring and the switch diodes (to be continued)
This is more of a repair log than a plea for help... having picked up a Maverick project machine in December from one of our well known members as p/x for a machine I sold to him.
It come with several known issues broken/loose coil stop under the ramp and some issues with the three opto switches for the multiball entrance and locks also a couple of the drop targets were broken
The coil was simple to repair just required a new bracket, the optos were a different story Sega use ultra bright leds instead of infra red ones as bally/Williams use, I ordered a couple of spares from one of our suppliers but I couldn't make them work very well they were near impossible to line up the sender to the receiver.
The small boards are unobtainable so searching for other answers I came across a tip in using ultra bright orange leds instead of normal red ones luckily I had some left over from a previous project
fitting these made a big difference to the sensitivity and were much easier to set up.
The paddle wheel entrance opto has been an issue with Data East/Sega from day one as it was sited next to a VUK causing vibration's to upset the switch board position. Sega come up with an alternative switch to fit, a magnetic reed switch instead of the opto I managed to locate one in this country well pleased in that.
With all these problems sorted I tried a couple of games and had several switch faults appeared I did not think much of these at this time.
It was apparent that this machine had sat for along time unloved and in the sun as most of the playfield plastics had faded badly and had gone very brittle similar with the rubbers they just fell off, so a new set of plastics were sourced as well all new drop targets,a rubber set came with the machine.
Parts arrived and were duly fitted now play testing began the switch faults were popping up all across the matrix one fault was found with a drop target wire chaffing on a GI socket that cured 4 switch's on one row. During play when operating flippers phantom switch closures were happening
on rows 3-8 from what I could work out but they were all intermittent and they all stemmed from the use of the flippers, mysterious.
Reading up using Marvins guide and Pinwiki ,I tested the cpu board by shorting across the send and receive connectors CN8 - CN10 these all tested ok all rows all columns, so this ruled out the cpu board, so I turned to the flipper board this all appeared ok nothing stood out except it was not the board that the manual stated it should be, but it was factory as the warranty sticker had the same serial number as the rest of the boards. A service bulletin from Sega detailed revisions to the board that should be carried out to upgrade it to the correct revision for this machine this was done and still phantom closures happened.
Now to start on the only other thing the miles of wiring and the switch diodes (to be continued)