Ivan Stewart Off Road

Artychoke

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Guys Ive got a used Track Pac board that im having trouble with. All I get is garbage on the screen. Ive taken out each TP chip and cleaned and checked for good contact but nothing has helped. My question is can I remove all the Track pac chips from this board and install hem on my perfectly good working board?

Thanks,
Arty
 
Artychoke said:
Guys Ive got a used Track Pac board that im having trouble with. All I get is garbage on the screen. Ive taken out each TP chip and cleaned and checked for good contact but nothing has helped. My question is can I remove all the Track pac chips from this board and install hem on my perfectly good working board?

Thanks,
Arty
Click to expand...

did you check to see if you're getting the right voltage to the board from the power supply?
 
No I havent checked that. But wouldnt you think it would be ok considering the original board works good?

Arty
 
I'm having the same issue here and I don't see a whole lotta Off-Road repair threads, which worries me a bit.

White screen, with black line garbage, and no movement or sounds of any kind.
 
I have you both beat! I have two non working boards! Anyone out there fix these guys? There seems to be plenty of demand.

With regard to the chip swap for the track pack, in addition to 24 eproms, there is also tiny security chip located at U85 on the bottom board that you have to swap as well.
 
i cleaned what looked like all the socketed chips- but it didnt seem like no 24 of them. I have the trackpak on this one, was working at one point, so I know it *was* good.

Are there socketed chips on the board underneath? And what the heck does a closed switch on the coin door or control panel mean? Acc to the manual, this can cause this screen garbage- what?really?
 
Yes 8 eproms on the bottom board.

Closed switch I think means one switch for constantly on, like one of the buttons of one of the coin switches. It seems weird that that would cause the problems. You could unplug the control panel and the coin door, to see if it helps.
 
Hey guys,
I have 2 complete, non-working Super Off Road boards as well.
Not much info out there on people repairing them.
I'll post anything I figure out on this thread. First I am going to try and re-set all the socketed chips on both the top and bottom boards, the bottom board has 34 socketed chips.
I think my next course of action is to try and replace both the Z-80B's.
If that doesn't fix things, I'm going to in dive deeper.
Seems like 2 easy things to try.
 
That sounds good Zork! I'll do the same here, and post some pics up on this soon. I say we just make this the official off-road pcb repair thread for now.

So far, with no change- I have:

*replaced the power supply, and checked voltages
*Cleaned and reseated all socketable chips on the *TOP* board only
*Connected the entire cp and checked for 'open switches' on the coin door as per manual.

On startup- a white screen with what looks like vertical black barcode lines. Remove power edge connector from pcb and replace, and blocky unrecognizable colored graphics appear, but they are obviously from the off-road color pallette.
 
Sounds good to me, someone has to start getting some info out there on this board....

Well I reset all the chips, it didn't seem to help.
Also reset the two cables that join the two boards, reset both sides.....

I swapped out the Z-80s from my other bad board. The junk on the screen didn't change much, but then again I have no idea if those other Z-80's were good or not.
In fact removing both Z-80s all together does NOT do a whole heck of a lot.....

Next time I make an order with Bob Roberts I'll pick up a few Z-80B's and put some known good ones on....
 
Also noted 7 test points on the bottom board. Any one know what one SHOULD see on these 7 test points?
 
i have an untested super off road board....anyone want to test it for me? if it works, i'll sell it to you....cheap!!! :) i have no way of testing it
 
Update:
I put 2 new Z-80Bs on tonight. No change...... Next I am going to re-flow all the solder joints, and after that I'm going to start swapping all socketed chips one at a time from my other board, assuming problem isn't the same chip in each board........
 
repairs

Interested to see how Zork was doing on his OffRoad repairs.

I wanted to add that I contacted El Dorado games today, and they no longer have the ability to repair these boards. So- does ANYBODY know who repairs Offroad PCBs? Or is Offroad becoming an impossible game to restore/maintain.
 
I really haven't done much more than put the new Z-80s in, there was no change. I have kinda put this on the back burner for the time, waiting for a rainy day when I don't have 4 other games to work on!! :) I have 2 non working boards, and I'm guessing that each board has a different problem. I'm just going to start swapping each socketed chip one at a time till something changes??? Pretty low tech I know....and time consuming, hence the rainy day plan!!!
 
If you know the voltages are ok, check the processor to see if the reset line is being triggered, and or that the clock line is pulsing. Sounds to me like the processor is dead. Garbage can be just random ram data since the processor didnt tell it to do anything.

Going to need at least a logic probe to check those.
 
I put two brand new Z-80Bs on it? That is the processor on this board correct?
 
I've always wondered if the battery was a suicide battery on these. I've seen a bunch of them dead, never could fix one. Of course I'm not good at fixing pcb's, so that doesn't say much.
 
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