(Topic ID: 88944)

Genesis - Tilt switch closed

By Vengeance

8 years ago


Topic Heartbeat

Topic Stats

  • 12 posts
  • 6 Pinsiders participating
  • Latest reply 26 days ago by Luzur
  • Topic is favorited by 2 Pinsiders

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#1 8 years ago

Having a problem with my Genesis, game was working file, till it decided to stat showing the tilt switch closed message on boot.

I've started going through the ground mods, have done some of them, but not sure that doing all of them is going to fix the issue.

Did a little research and found if you remove the switch connector from the mpu and the issue doesn't go away then the problem is most likely on the board.

When I did remove the connector rather then the tilt switch closed message I got the slam tilt switch is closed message, so I did the mod to permanently defeat the slam tilt switch and after that with the connector removed the tilt switch closed message was on the screen.

Which leaves me to believe that the issue is somewhere on the board. Just not sure where,or what needs to be done.

So any suggestions would be helpful.

1 week later
#2 8 years ago

Same error here with a Victory, cant seem to get passed it, Ill be monitoring this thread

#3 8 years ago

Switch matrix problems on System 80 boards are pretty common.
Use the "diode test" contained in the PinWiki to test Z10 thru Z13.
http://www.pinwiki.com/wiki/index.php?title=General#Testing_an_integrated_circuit

If you find a failed 7400 or 7404, replace those first. You may still have a failed 6532 at U4.
If you need help with the repair, drop me a line. I've fixed hundreds of 80-80B MPUs.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#4 8 years ago

I just did the diode test (basically without having a clue what I'm doing, and a few read above 8, instead of between 4 and 7, does this mean they are fried?

I booted up the game with only the displays, and the power connected to the mpu, and I get the "tilt switch closed" error, so Im sure the error is on the board, and not the playing field.

#5 8 years ago
Quoted from Brandje:

I just did the diode test (basically without having a clue what I'm doing, and a few read above 8, instead of between 4 and 7, does this mean they are fried?
I booted up the game with only the displays, and the power connected to the mpu, and I get the "tilt switch closed" error, so Im sure the error is on the board, and not the playing field.

The error is definitely on the board then.
Readings above .8 =may= be an indication but the ranges are not absolute.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#6 8 years ago

Guess I'll be taking this to someone qualified for fixing, My soldering skills are moderate. is it easy to mess things up on these boards, or do i have some room for trial and error?

#7 8 years ago

im not an expert so I paid to have someone to come out and work on my boards once while I watched his repair and realized that I have the right stuff here and that is a small tip on your iron and the avoidance of too much heat. not worth it to damage them but it may in the end beat paying around a 100 bucks for a fix

#8 8 years ago

well i have a small iron tip, i will go and try my skills on an old computer motherboard first

#9 8 years ago

The culprit was z14, replaced, and it works!

7 years later
#11 4 months ago
Quoted from ChrisHibler:

Switch matrix problems on System 80 boards are pretty common.
Use the "diode test" contained in the PinWiki to test Z10 thru Z13.
http://www.pinwiki.com/wiki/index.php?title=General#Testing_an_integrated_circuit
If you find a failed 7400 or 7404, replace those first. You may still have a failed 6532 at U4.
If you need help with the repair, drop me a line. I've fixed hundreds of 80-80B MPUs.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

having a problem with my gold wings i think i shorted something on the mpu now display says tilt switch closed also tried unplugging everything except the power and display and alert remains so i guess its the board.. anyway i pulled it out and started checking the integrated circuits using your video i found here. i didnt find anything on the z10-13 or u4 like you you mentioned but if the test in the video works on these modules as well i was getting suspicious reading on u1 z1 z4 z36 namely 0s and .2s.. before i start trying to replace circuits i guess in wantkng to make sure that these circuits will test the same way as the 7400s cause they have a different part numer and based on which ones are showing up suspect could they be causing this tilt switch issue.. also would it be normal for so many of them to short at once?
im a novice at repairs so looking for some advice before i cause more harm then good

3 months later
#12 26 days ago
Quoted from quantumjosh:

having a problem with my gold wings i think i shorted something on the mpu now display says tilt switch closed also tried unplugging everything except the power and display and alert remains so i guess its the board.. anyway i pulled it out and started checking the integrated circuits using your video i found here. i didnt find anything on the z10-13 or u4 like you you mentioned but if the test in the video works on these modules as well i was getting suspicious reading on u1 z1 z4 z36 namely 0s and .2s.. before i start trying to replace circuits i guess in wantkng to make sure that these circuits will test the same way as the 7400s cause they have a different part numer and based on which ones are showing up suspect could they be causing this tilt switch issue.. also would it be normal for so many of them to short at once?
im a novice at repairs so looking for some advice before i cause more harm then good

Im having the exact same problem, but i switched out Z11 and Z14 chips.

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