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Title: Pole Position Help Plz Post by: remyjd on September 10, 2016, 10:02:34 pm So i got a pole position cheap that wasnt working but the cabinet was in nice shape and i was hopeful.
https://www.dropbox.com/s/icy8nuqms1jhetj/pole%20position.jpg?dl=0 (https://www.dropbox.com/s/icy8nuqms1jhetj/pole%20position.jpg?dl=0) I replaced the F3 fuse as outlined in John's Video and it started working but the start screen was very orange and the tires and pavement were almost the same color.https://www.dropbox.com/s/pv3bhquikn20xeb/pole%20position%20dark.jpg?dl=0 (https://www.dropbox.com/s/pv3bhquikn20xeb/pole%20position%20dark.jpg?dl=0) Couple weeks later i moved the machine to a different spot in the house. Suddenly the screen was bright and i was happy thinking the other house plug must be getting bad.....Then it started. 1. machine turned itself off then back on losing all the high scores with it being sometimes bright and sometimes dark(http://) 2. then cars and signs started blinking off and on 3. then they stopped blinking but the left side of the road up to the center had horizontal stripes with the side stripe now also appearing in the middle stripe So i thought maybe i could look at the connectors to the pcb board thinking i should do the "bulletproof" to be sure it worked. What i found was the Video PCB had already had the voltage and ground cut from the connector. The two power wires were combined into one thin wire that was hooked to the 5v test point and got very hot but the ground wire seemed to be hanging. So i unhooked the pcb..pulled it out looked at it...it looked visually sound so i put it back and hooked it back up. Now all i get is a garbled screen at best. Now im really confused. Obviously the wire connections are a mess...other than that whats going on? Any Ideas on what happened or what i should do? https://www.dropbox.com/s/m79jl8xcp1gdcuz/pole%20position%20connectors.jpg?dl=0 (https://www.dropbox.com/s/m79jl8xcp1gdcuz/pole%20position%20connectors.jpg?dl=0) https://www.dropbox.com/s/uw66fiti5imj9jw/pole%20position%20garbled%20screen.jpg?dl=0 (https://www.dropbox.com/s/uw66fiti5imj9jw/pole%20position%20garbled%20screen.jpg?dl=0) Help...? Title: Re: Pole Position Help Plz Post by: NoQuarter on September 12, 2016, 07:21:47 am Congrats, that pole position cab looks great!
I would start off testing to see what voltages you are getting at both boards test points. Title: Re: Pole Position Help Plz Post by: remyjd on September 12, 2016, 12:04:06 pm Thx. That was my only thinking of a next step. Test voltage getting to the board. Beyond that im at a loss. That wiring harness is rough being all cut up as it is.
Title: Re: Pole Position Help Plz Post by: P-feif on September 12, 2016, 08:34:51 pm Try reseating any socketed chips. Also look at the solder side of the board and look for any dry solder joints. Touch up any you find and touch up any header pins and any place that chips or chip sockets are soldered to the board. Don't allow the solder to joint any of the solder points together. What you seem to be describing is something that is not soldered in, or plugged in good, or loosing it's connection. A little shot gun approach works sometimes. Also look at the condition of the board edge and the pins in the connector that plugs into the board edge and any connectors in the wire harness. There may be a loose connection there. As said above check your voltages.
Title: Re: Pole Position Help Plz Post by: remyjd on September 12, 2016, 09:45:55 pm Thx for the help. Im a total noob when it comes to this stuff. I understand what the dry solder looks like in theory and will do my best. Im starting to think i should take a continuing education class of electronics at the local junior college. I love to have it up and working good as ive always wanted arcade machines and pole position itself is to much fun not to have going. Its the only game i got right now but if im lucky i have a trade of something else on the table that will get me a JAMMA helicopter game that has had the board replaced with a 60 in 1. Im hoping that goes through....
Title: Re: Pole Position Help Plz Post by: remyjd on September 13, 2016, 10:42:42 pm I have a very old voltmeter whose leads are alligator type clips built on. As such i was not able to test the voltage to the processor board. Besides which Im not sure yet which is the voltage on the connector (bottom like video board?).
As for the video board....it looks like im getting 3.5 volts ac. Not close to 5. so...whats the next step on the power? https://www.dropbox.com/s/m6q5i76w2sxc5u7/pole%20position%20low%20voltage.jpg?dl=0 (https://www.dropbox.com/s/m6q5i76w2sxc5u7/pole%20position%20low%20voltage.jpg?dl=0) Title: Re: Pole Position Help Plz Post by: P-feif on September 16, 2016, 08:40:33 pm Well I'm not very good at this either. I'm just sort of repeating what John says in his videos and what has sort of worked for me in the past. I'm still learning but having fun learning.
At this point I'd disconnect the wire connector from the edge of the board and then check your voltages at the power supply. Either they need to be adjusted, or there is a problem with the power supply, or there is a problem elsewhere in the game that is pulling down the power supply. See if you can get 5 volts with the edge connector disconnected and report back. |