Super Punch Out Schematic

discuspro69

New member
Joined
Feb 17, 2008
Messages
452
Reaction score
1
Location
Austin, Texas
Anyone have a pdf or link for a Super Punch Out board set schematic? I'm missing blue signal to my lower monitor. I thought it might be the monitor but both work great with the top signal but both are missing blue with the bottom signal.

It may be a loose or dirty connection but in the mean time I'm requesting the schematic. I already have the manual in pdf form but has little detail about the boards.
 
Your right.

Do you know if a color signal voltage varies or is stationary, or is that a board specific question? I'm asking because this board has one of those filter type boards connected to the mainboard. There are test points all along that filterboard and I want to see what type of voltage would be going out through the blue signal but I don't know what kind of voltage to expect.

One other thing, I'm looking at that pdf of the schematic and there are M and S sets of signals. Do they stand for Main and Secondary? Also which monitor would be considered M or S, the top and the bottom or vice versa?
 
Last edited:
Sorry, I think out load too much but I found the answer to one of my questions:

M refers to the Lower Monitor
S refers to the Upper Monitor

Still don't know what they stand for though.
 
Usually, color voltages tend to run about 2 vdc for each color on a 15khz monitor. Don't normally see fluctuations, no...
 
Im with 2600, my money would be on a BAD color prom. My Original Punch-Out also had a similar issue with the blue lower. New prom solved the problem.

If you take a pic. and supply us with a screen shot it may give some of the gu-ru's a better indication.

PS> When you decide you want to sell your Super pcb PM me :)
 
So, I checked resistors R51,52,53,54,55,56,58,59 all good. Checked transistors Q11,12 both good. Reflowed 8F's socket and reseated the chip. Turned it back on, with a twinkle in my eye for good luck, and same thing. Blue is not there and both blue pots on the monitor don't raise it any, not a monitor issue because both have blue guns working.

I noticed something, checked the vdc of the color signals going out to the lower monitor. Both green and red signals actually fluctuated between 3.6 and 4.9 vdc, while blue signal stayed at 4.9 vdc with no fluctuation. I'm going to check if the top monitor signals do the same.

So the 8F prom is a 82S131, are these obsolete? I checked mouser and I didn't find a match first time around. Also, I've programmed EPROMs but not PROMs, what am I going to need? I've been using a Sivava programmer, even though I've heard bad things.
 
Last edited:
Update:

Top monitor green and red signals fluctuate as well between 3.6 and 4.9 vdc. The top monitor blue signal actually fluctuates as well but much less of a window between 4.6 and 4.9 vdc, definitely acting differently than the bottom monitor blue signal.
 
Last edited:
I can highly recommend this gentlemen

http://hobbyroms.com/

I ordered my replacement proms from him with NO issues. Very helpful and knowledgeable as well. Just email him with what you need and he can flash a prom for you fairly inexpensive. You can conduct a MINOR test with your blue prom. Remove the chip from the board all together and play the game. See what kind of results you get. When I did this (using NO bottom blue prom) the discoloration cleared up quite a bit BUT you could still tell it was off. It looked BETTER with NO blue then it did with a BAD blue prom. Go figure??

Unlike Eproms, proms are write ONCE only, so at the very least you would need blank prom providing your programmer does proms??
 
Removed 8F, powered up and no difference.

I think you guys are right about 8F being bad. There is +5dvc getting to the chip. Outputs 1-4 are stuck on high (using logic probe), while 8E and 7E outputs are pulsing.

I may end up buying a programmed 2S131 PROM from someone, but before I do that I want to look into programming a PROM myself. Doesn't look like my Sivava EPROM programmer will do it, unless I can figure out how. What have people used to flash PROMs with?
 
Can you stick the chip driving the blue on the upper monitor in the socket for the lower to test?
 
I was thinking of trying that but I was thinking the program image might be different, although its probably the same. I guess it shouldn't hurt, I'll give it a try and report back.
 
Switched 8F with 7F and saw blue but in the wrong places, I figure because the program image must be different than 8F's. I did see blue though.

Next step is replacing 8F but I still have the question of what are people using to program/flash PROMs like 2S131??
 
Update:

Obtained a newly programmed 8F, replaced it for the old 8F and boom shakalaka blue is back in the house!!!!!!!!

Thanks too all that pointed me towards 8F!
 
Back
Top Bottom