Sega Trackball Wiring

[Crowquill]

A while back I bought a generically-listed Sega control panel off of eBay that had two trackballs mounted in it. The 2-1/4" trackballs have Sega's name molded into the casing and printed on the optic boards. Apparently they are really made by Sega. I'm installing one into my MAME cab, but didn't know if the wiring might be different than the usual Happ or Wico.

From the artwork, the control panel seems to be from a Japanese candy cab from the late 80's (aero city).

From what I've seen, all the brands have the same pinouts, but I wondered if anyone had dealt with Sega trackballs specifically or had a manual laying around for a Sega game that might have used them.

The hacked mouse and harness I ordered from Oscar should be here tomorrow.

If I tried the harness and the wiring is different would it damage the trackball?

If anyone is wondering, the ball is from an old Kensington Turbo Mouse.

[Crowquill]

I recieved the hacked mouse from Oscar the other day. I'd ordered the Happ trackball harness as well, but since I don't have the original wiring harness to connect to the optic boards it didn't get me far. I finally had to cut the Molex connector off of the harness from Oscar and splice it into a bundle of wiring that had been for the front panel of an old PC (the LED and switch wiring). The ends that plugged into the mobo plugged into the optical boards just fine.

I wired it to match the happ optical board pinouts. I'm getting nothing though.

I double checked the wiring and checked that I'm getting continuity between the pins of the optic boards and the pins of the mouse. Everything checks out OK.

[RayB]

I'm no electronics wizard here, so I'm taking a wild guess:

Im guessing pin 1 is the power (+5 if they are adhering to standards). Pin 3 and 4 look like they are joined? If so, it's grnd. That leaves pin 2 for the "signal".



(revised because I was numbering the pins backwards!)

[u_rebelscum]

With the LED of the sensor marked at the top of the underside of the board (the 'A' & 'K"), that means pin 1 (the right most when looking at the underside) is power (probably 5v+), and pin 3 is GND.  That makes sense as pins 2 & 4 make only one connection at the sensors end of the optical sensor unit.

Pins 1 & 2 don't look joined to me, and optical boards like this usually have 2 sensor outputs.

FWIW, sega looks to be using a sensor with 1 LED & 2 sensors, instead of 2 sensors each with one led & one sensor like you see on happs & betson TB now.  Also looks like sega licensed or copied Atari's (now happ's) TB body.

[Crowquill]

I tried the pinouts u_rebelscum suggested. Didn't get any response. Do you think that I could have damaged the board by hooking up the standard Happ pinouts? For reference the happs hook up (pin 1-4) Signal A/5V/GND/Signal B

[AwesomeAlbert]

Did you ever get the trackball working? i have a sega trackball too,  i couldnt hack it, dont know if its the trackball, mouse, or ME !