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WPC Speaker Hum What Causes It?
- Thread starter RudeDogg1
- Start date
Shame you'll miss out on the best pinball machines ever made.
Because i became fed up with my old B/W pins always having problems.
Can't beat new and shiny. I don't mind waiting 20 years before my caps start drying up
Cant beat new and Shiney with crappy flippers and dodgy Graphics...
Ah, yes, I see it now. I had assumed that as my PSU generated at least five voltages one them would be used for the audio amps but in the Bally AS-2518-50 Sound Module a 12V supply is derived from the 43V coil voltage:
In this instance C17 would be the culprit?
- Joined
- Jul 21, 2011
- Messages
- 2,468
Different scenario. Your c17 is tidying up the already smoothed 43v. It's used for coils so probably quite uneven. On wpc sound boards, the supply is wholly AC , and rectification and smoothing is carried out on the sound board.
Now now Paul, we don't want to turn this into a B/W VS Stern thread do we?!Cant beat new and Shiney with crappy flippers and dodgy Graphics...
Because i became fed up with my old B/W pins always having problems.
Can't beat new and shiny. I don't mind waiting 20 years before my caps start drying up
Anyone know what caps mr stern uses? Lets hope it's not chongx.
Because i became fed up with my old B/W pins always having problems.
Can't beat new and shiny. I don't mind waiting 20 years before my caps start drying up
The lead free surface mount components will fall off the cpu board years before the caps dry up
That's assuming Stern use decent caps? 20 years ago, most cap manufacturers were at least half decent. In the year 2014, there must be at least 100 dodgy Chinese capacitor brands
- Joined
- Jun 16, 2014
- Messages
- 115
Some new Stern pinball don't even PLAY when coming out of the box !!
They only work after fix or update.
Hope they still work after 10 years (Half the age of b/w).
but they look nice, just like me......20 years ago
They only work after fix or update.
Hope they still work after 10 years (Half the age of b/w).
but they look nice, just like me......20 years ago
What ? You still look nice.Some new Stern pinball don't even PLAY when coming out of the box !!
They only work after fix or update.
Hope they still work after 10 years (Half the age of b/w).
but they look nice, just like me......20 years ago
I don't believe that.
OP
OP
Well I replaced the 2 big caps but still it hums which other caps are problem ones?
I know its not a fix, but would wrapping the speaker wires around a ferrite core help?
OP
OP
Anyone? Id change all the caps but according to the manual theres bloody loads on the sound board
OP
OP
I think so it was 2 years ago tho
