[Jukebox-list] Wurly 3300 ?

[Ron Rich]

John,
  Thanks for the tip--however this is an AC circuit--no brushes--and it only blows the fuse every month, or so-- ( I suspect something, but was hoping someone would confirm it).
  Ron Rich

John Robertson <pinball at telus.net> wrote:
  At 9:26 AM -0700 7/6/07, Ron Rich wrote:
>Hi All,
> Anyone have any idea why a 3300 Wurlitzer would -intermittantly- 
>blow the 8a. AC fuse? Does it anywhere between from 100-500 
>plays--TIA, Ron Rich
>
>

Hi Ron,

What I do in cases like this - where the item that takes out a fuse 
is not obvious - is I break the line after the fuse at the various 
devices powered by that fuse. Then I fuse each of them independently 
with a slightly lower value - say 5A on the 8A line, and the one that 
pops shows the likely suspects' area.

Aligator jaw jumper wires and a handful of fuses will usually resolve 
this in an hour or so...

Oh, and if there is a DC brush style motor on the circuit that 
intermittently blows a fuse, check the commutator for carbon shorts 
between the elements.
Link to nice picture of armature with the commutator as the closest part.
http://www.microchip.com/stellent/groups/designcenter_sg/documents/market_communication/~export/en026724~5~en006096~BasicLayout/48808-2.png

John :-#)#
-- 
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
www.flippers.com
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