Good morning everyone,

So I've just about got my machine back to 90% (I'm not sure it'll ever be 100%, given the age) but last night the large red lamps were all working, but after playing the machine a bit this morning 4 of them have stopped working. The 2 on the left and right of the uprights for the field goal, and then the two on the farthest upper left of the play field. The one on the upper right of the play field, and the one on the lower left are still working. Just trying to figure out if there's some wire on the play field that can commonly become loose because it might get jostled, that would cause these four specific lamps to stop working. Looking to do some maintenance to get things a bit more reliable.

20211010_093739 (resized).jpg

20211010_093743 (resized).jpg

Resolved. Looks like replacing those with LEDs was causing an issue. Putting the larger halogens back in solved the issue.

My only remaining issue is the below red lamp not flashing, but I'm about 99% certain the purple wire next to it needs to be connected. Can anyone verify from theirs?

received_2923347087906614 (resized).jpeg

Anyone have a picture of the wiring to the flippers? Thanks!!!

Wow, you’re right. I just found it. Worn almost completely through!!

19ED0327-9971-4824-9805-4DA3C6A08B40.jpeg

C7E2121C-DEA0-4681-9416-314750B9CB15.jpeg

Alright so I ordered new coils and the didodes are reversed? Is that correct? My flippers aren’t working correctly

7C4B0D73-D9D0-4A32-80CA-721CE179B460 (resized).jpeg

Can anyone send me a picture of the flipper coil and wires that connect to the coil? Thanks!

Forgot I took this a few days ago for you!

6E9B1C80-45CC-46CE-BDB6-F7629D69AE9B.jpeg

Thank you so much!

Alright mine seems to be wired correctly but I am still having issues. The coil gets 50volts coming into it but the flippers just don't work. I thought maybe the diodes being reversed was the reason why but I guess not..

Have you tried grounding them directly? If the machine is on and started up, you should be able to put an alligator clip on one side and tap it against the ground to get it to fire. If that works then the coil is good. If not, then it’s bad. I recently had this happen, coil fired but wouldn’t hold. Hold winding was shot but you’d never be able to tell! It looked fine until I desoldered it.

Fixed- It was a connector issue and now the flipper work great.

Hi all, my b eject hole suddenly stopped working, so the ball just sits in the hole and I can’t continue the game. Does anyone have any idea what might be causing this? The switch seems to be working, but then the ball just sits there. Thanks. Not a lot of info on the net about this particular game.

It sounds like it is working, but the upkick doesn’t seem to have enough power. Do I simply need to replace the coil?

I just joined the club!

Quick question before I start digging into the game more. How do you turn on the Monday Night Football song that plays at the end of a game? Mine isn't playing it even though attract mode music is set to on.

Edit: I figured it out, the buy-in setting needs to be set to "balls". I guess the song is considered a sort of buy-in timer, but only for keeping any locked balls. Weird.

PXL_20211224_040233937 (resized).jpg

So I'm missing the blimp plastic on the right ramp that prevents airballs. Anywhere to buy it, or anyone have any extras they'd be willing to sell? The airballs without it aren't too bad, but I have had a few jump over the switch now.

621b75139f8d850422056017c03e06717f3b5e6d (resized).jpeg

Mine didn't have one either when I got it, so I just used a 4" plastic disc instead. Works fine and doesn't stand out at all.

20211227_125911 (resized).jpg

So I'm looking to buy upgraded ROMs, but it looks like I need two game ROMs, B5 and C5. My game however only looks to have one game ROM, C5. The B5 location doesn't even have a socket.

Do I just need to buy the C5 ROM? Sites that offer the ROMs seem to imply I need both, and even the manual says there are two PROMs on the CPU board. Not sure what the deal is.

PXL_20211229_171112806 (resized).jpg

So I noticed after getting my Monday Night Football set up that there is a lot of cracking and a small piece missing from the end of the bomb ramp. After playing for a bit I realized why. Sometimes, if you hit it just right, the ball will fly off of the jump ramp and smack right into the end of the bomb ramp!

So, I got a couple of 3" hex posts to place in front of it where some acorn nuts usually go. So far, these have prevented airballs headed towards the ramp from actually hitting it! The upper one is pretty tight, and unfortunately due to the missing plastic on my ramp the ball is able to bounce off of it on occasional ramp shots, but I don't think that would be a problem with a ramp that's fully intact. May see if I can throw together a metal ball guide to place over the broken plastic.

PXL_20220102_232908019 (resized).jpg

Having a super weird issue.
When you lock a ball in the left VUK, and then you wack another ball up there it kicks out the locked left anyway, so you get two balls.
Any clue what may be happening?
If the switch is misadjusted why would it kick out a new ball?

I hit the locked ball several times and it didn’t do it for me, but Mermink has had it happen to her several times while playing.
What is she doing to break my game??

So to clarify, when you lock a ball in the left VUK and then launch another ball into the "pass" lane, the VUK fires sending the locked ball out? So, then the second ball rolls back out of the pass lane, giving you two balls in play. If this is the case, does the "pass" light remain solid, as though a ball is still locked there?

Yes, that’s precisely the issue. It doesn’t happen every time, it’s uncommon but screws up the entire game

This is our time to shine boys! Best Super Bowl party game ever! Just set mine to four balls a game. Football points only. Ready for my guests to try to launch the ball through my playfield glass. Such a fun crowd pleaser. Hope everyone here gets in a couple skill shot runbacks before the big game.

So I've been trying to troubleshoot why my Monday Night Football occasionally kicks out two balls, and the only thing I'm noticing in the switch test compared to the other switches is there seems to be just a tiny delay when I press those switches from when they register. Every other switch seems to be instantaneous. It's like a half a second or less but I'm sure this is what's causing the issue. Any idea what would cause that kind of delay? I'm a little at a loss.

I tried replacing all of the capacitors on those switches with new ones but that did not fix anything.

To elaborate with a little more detail: The first switch which is the out hole switch works fine. It's the trough 3 and then each switch after that that have the delay. Replacing the capacitors on those switches did not help. It's like a half second delay after you press it and then a half second delay before it stops pressing when you let it go.

Shooter lane switch works perfectly. It does not seem to be an issue with any switches themselves, but all 3 through switches have the same delay.

I'm with you it's a really odd problem.

I even tried replacing the switches just to be sure, and even then the problem persists.

Switch 1 Even after replacement is occasionally even sticking closed even after it's no longer being depressed, at least in the test menu.

You replaced the switches and diodes?

Yes I did. Didn't solve anything unfortunately.

Does anyone have schematics for MNF? I can't find them anywhere. The manuel is no help. Thanks

Looks like IPDB has them digitized:
https://www.ipdb.org/files/1616/Data_East_1989_Monday_Night_Football_English_Manual.pdf
Pgs. 35+
(What specific section are you looking for?)

So I recently upgraded the ROMs on my MNF (From 1.4 to 2.7) and I have to say I'm a bit disappointed as the newer ROM has a few changes I don't like at all. Mainly, the locks now light up every time a new ball is served, even with the spot locks setting off (Now the only difference between it being on and off is that the locks aren't lit at the beginning of the game or immediately after multiball). I was really enjoying the difficulty of having to knock down the drops to light locks, but now there isn't much point in doing that. It also shortened the super jackpot timer (I guess since multiball is easier to reach now) which cuts the music off early.

On the other hand it fixes a handful of bugs I noticed on the older ROM, mainly one which caused the football scores the randomly change after a game is over, making it hard to know who really won.

I think I'm probably going to switch back to the older ROM, but I'm wondering, does anyone know if there's a ROM that doesn't make the multiball too easy to reach while also fixing some of the bugs of the older ROM? I'm assuming there's other revisions between 1.4 and 2.7, but where I'd get them and how I'd find out what the differences are, I don't know.

So this is interesting as I just picked one of these up. Mine says CO2-4 when it boots. The game currently plays mostly fine in single player, but I was told does not work in multiplayer. The folks I got it from said that they were pretty sure it was a rom issue, but they didn’t get a chance to try and replace them. It’s also got some quirks in single player, and just when it is on it freezes after a while, so I’m definitely interested to see what will happen with a new set of roms. That said mine also starts wit the locks lit. Can’t quite tell if that’s adjustable, as I want to knock the high score off before I adjust any settings. Will let you know more as soon as I suck less at the game, haha.

Anyways, looks like I can buy the roms on here and there are two sets of two or Marco has five individual ones, which I find that discrepancy a bit odd. Any suggestions on what to go with?

Alright so I started playing my MNF tonight and noticed the slingshots aren't working. So I started checking around and found the F5 4A Sio-Blo Solenoid (34VDC) on the power supply fuse blown. Replace it and it did it again. Any thoughts guys?

Back right is wrong. Some random leg, probably replaced a bent one. The other 3 are correct

Man I’ve had my fair share of issues with this game. Game was playing good now my isn’t booting correctly. MPU is a new rotten dog, and I am only seeing two lights on usually the light on the left blinks I believe. Any thoughts?

6B66DE76-1D79-4CAF-82A3-7AFC9BFB8BE5 (resized).jpeg

You might try reaching out to JodyG, I know he's been making some less common ramps. He recently added the long ramps from Indy500, so you never know.

Is it normal for the ball that comes out of the right side for multi-ball to almost always go straight down the middle? Is there a common adjustment I can make to fix this?

I'll have to figure out how to realign this. Thank you.

Do you have any extras of these?

-Scott

Can anyone help? what wire goes to the LEFT side of the fuse above the left flipper?

mnf fuse pic (resized).jpg

Both wires at the end of the fuse are grey/green stripe. the right side has two wires going to the left and right flipper coil lugs. the left side has one which
is in a cable loom. Not sure where it ends up, not able to pull the game out to access the backless to see where it lands. Looking at the schematic from the manual, I see Grey/Green going to CN-11 pin 6 SOL. Drive 5 at the CPU board to J-1. Perhaps someone with more skillset will chime in!

MNF1.jpg.pdf

MNF2.jpg.pdf