Pole position optic board

jbk

Active member

Donor 4 years: 2011, 2013-2015
Joined
Mar 6, 2010
Messages
1,568
Reaction score
20
Location
rivesville, West Virginia
This is the steering optic board from my pole position. Can anyone identify the IC on the board, what is it and where can I get one. The board is not working correctly and replacing the components is my last option. An optic board from an atari trackball is not interchangeable, tried it. reflowed solder - no change. Any other ideas? Anybody have one for sale/trade/gift?
 

Attachments

  • SANY1241B.jpg
    SANY1241B.jpg
    31.5 KB · Views: 35
  • PPIC.jpg
    PPIC.jpg
    89.3 KB · Views: 25
It's a 4013 CMOS....Are you sure you don't have other problems. The Centipede opto board should have worked (if it was a working one).

Massive amounts of Pole Positions were produced using the same opto board as Centipede. The first 5 revisions of the Pole Position manual lists the opto board as part #A035220-02. In the Centipede manual, the opto board is part # is the same number. I can't find a revision 6 Pole Position manual, so I don't know what it lists.....but the revision 7 manual lists the part number as A040510-01. So, somewhere between revision 5 and 7....they upgraded the opto board. I assume the CMOS chip helps the a more accurate "clock" from the encoder wheel.....thus creating a more sensitive feeling steering (not that that's actually necessary with a game like Pole Position).

Edward
 
I have a working atari trackball from a millipede. The opto board mounted in PP and had the same connector but would not function. The steering works when the machine is first turned on then quits turning left. It will work through the qualifying lap and somewhere about halfway through the first race lap the left steering stops. you can turn the car right but it will not come back left. I have cleaned the edge connectors with the same results. I have a couple of parts boards I could swap out the eprom responsible for steering to see if that helps if anyone knows which one. The PP is a later edition because it has the factory cooling fan and duct over the pcb.
 
Last edited:
The custom chip at 9K on the CPU board is responsible for interpreting the steering opto.

Edward
 
While it is possible the 53xx (you can eliminate the chip by subbing from another board) chip or socket could be at fault I haven't found those to be a source of that type of problem, if you have an o'scope available, check for pulses on pins 3,4,5,6 of the cmos inverter at 8L, that is the weakest link in the chain and could be failing as it warms up.
Dick
 
Back
Top Bottom