The Aussie Pinball Arcade
Aussie Pinball Forums => Technical Matters => Pinball Repairs / Problems & Assistance => Topic started by: Marty Machine on December 06, 2008, 05:05:13 PM
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Hi All.
My left Flipper (Stellar Wars) seems to trigger the soundboard fx almost everytime.
It seems the flipper switch? or solenoid coil/dead diode? is creating a spike somewhere that upsets the soundboard and generates the odd ding/boing fx.
Any ideas?
Marty.
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The old "ghost switch" - Try tapping the playfield in the lower left hand side of the playfield.. Could be a switch that is adjusted too close ?
does the score increase ?
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No, i've looked at the flipper switch, there's a healthy gap there.
It's not triggered by tapping the cabinet or anything microphonic like that, it's ONLY when pressing the left-flipper button.
Also, it's not the same sound each time, there's a variety of boings/dings and even the odd explosion is triggered too.
I imagine there's a common supply rail that the flipper coil is spiking.
Thanx,
Marty
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hey Marty
you still working on it I see
how did that playfield go ?
your manuals will be at work monday for collection too
thanks
mark
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Howdy Mark,
Yep, always tinkering with Stellar Wars, gradually ironing her out....
That other playfield is being sorted, chucking the junky bits and cleaning the usable bits, should be a good start for the "project pin".
It also helps see how everything's mounted, before i open a can'o'worms with Stellar mods. *)*
Seeya Monday for the manuals, and probably seeya tuesday if you still need more hands for container-day.
Thanx,
Marty.
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no worries mate
the more thans the better re container you will upset a few if you come and help
a few boys here would love to come .....
i will post here and confirm tuesday once i have a time booked in
mark
ps you have opened a can of worms already but i am sure you will get plently of help here
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Thanx Mark, keep me posted.
MY next purchase is a *BIG* can of worm food :lol
Marty.
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GI issues and a phantom sound triggered by a flipper button...
Sounds like a Grounding problem.
Stupid Question #1 - There's a Earth strap that connects from the body, and is fixed to the earth point on the head. Male sure this is connected properly.
Check the connectors throughout the machine - maybe refit all of them..
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The sound trigger is hairy, i checked the grounding straps, all in tact, all measure .000001 ohms back to earth point.
The sound trigger is also triggering the normal (bell/chime) sounds when in fact the rom is in "synth" mode.
I manually flick every switch on the playfield and can't find the same sound that the flipper triggers, but when i switch the soundcard into normal mode (not synth) i hear the same sounsd on various targets etc.
weird.
Marty.
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Check the ground on the sound board itself, even running an extra ground from the board to ground strap.
Tey this in flipper ground also.
Im inclined to agree - youve got a little spike from the flipper which is triggering a sound. One of these has an indirect path to ground
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hehehehe, i guarantee i won't forget this one, once i solve it ^.^
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Damn! Doh! and everything else.
I discovered today that the Right flipper switch has a 0.1uF greencap (supression) across it, and the Left flipper doesn't.
I added a 0.1uF onto the left flipper switch and Tah-bloody-Daaah !!!! it's now silent!
No more false triggered sounds anymore.
It's reduced from 9/10 false triggers to 0/10 when hitting the flipper switch constanly for 10-20secs or upto 1 minute.
Yay Yippeee #*# :lol :D
The caps aren't shown in the manual, i can only guess this was a mod from previous owner(s) ???
I won't forget this in a hurry ;-)
Thanx for everyone's input anyway.....
Marty
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Good stuff Marty.. I don't have any on my Flash, so I was stumped myself !
#*#
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Yep, it's hard to trace components that aren't in the manual.
I guess it always pays to snoop around inside the machine, looking for mods and nasties lurking ;-)
p.s. the machine is still quiet #*#