I'm looking for anyone who may be able to assist me with improving the clarity of some schematics. I've added a small snip for reference. This schematic is the only one known to exist for an uncommon PCB used on a Midway gun game.

Hoping maybe someone lurking has the talent to help electronically improve the legibility of this schematic (and about 10 more).

Infrasense Schematic Snip.png

It is for Midnight Marauders. Mike Pacak recently sold his MM and there were no schematics according to the new owner. Todd Tuckey had one, no schematics. Steve Young has the manual for the game, but nothing more than what IPDB has and in fact maybe less. Basically everything paperwork, code, etc. IPDB has, has come to Jay through me. I was very fortunate to obtain some blueprint sized schematics for many of the assemblies and parts for this game. Those are crystal clear and will be uploaded soon to IPDB. However the unique board is the "Infrasense" board that takes the IR gun shots and converts it to a signal the Bally pinball MPU (-133) can use. This copy of a copy of a copy surfaced about 4 months ago and after talking to a great number of MM owners, there appears to be nothing better than this copy. I've asked around quite a bit and nothing thus far has ever surfaced except for this ratty copy.

I have no experience at Photoshop, but PM me with your email address and I'll email you the .tiff and .pdf versions of the scans. ForceFlow is correct in that the yellowing of the paper has made the originals actually harder to read than the scans. There are about 10 sheets of this quality and are 11" x 17" paper. I took them to the local shop to have them scanned in at 600 dpi.

Many of the others of the 10 are easier to read, but have a lot of black "snow" on them. I would think that photoshop may help clear that up as well. This stuff is all public domain so I'm willing to take any help where I can get it. The Infrasense board also has a parts list on another 11" x 17" sheet so yes, it is very possible to cross reference the schematic to the parts list. It's what I've been doing currently. However knowing technology can do miracles with images today I thought it was worth an ask to see if they could be improved. Also, having a clear and quickly readable copy of this schematic would really help streamline troubleshooting. There's a lot of unique things going on inside this board so it's been challenging to say the least in resurrecting failed Infrasense boards, but I'm making progress

Perhaps one of the mods could add Midnight Marauders to the game list so I can reference this and the other thread together.

You guys amaze me! slochar (any countless others) I can not say "THANK YOU" enough for taking the time to help recreate this schematic. For me it's not so much for today, but having a legible, usable schematic for the Infrasense years down the road will likely keep more of these machines from the landfill. People know the other boards inside the door, but the Infrasense scares them because it's unique. There's a pinside thread dedicated to Midnight Marauders and Jay is housing documents and code files on IPDB. Hoping if someone searches for this game years down the road that this will give them a place to start and people to reach out to help get it running.

As for your question on the board itself, I have several Infrasense boards and would gladly assist with verifying components and values. It truly is the least I can do. PM me and I'll get you whatever you need.