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STEPPER UNIT REPAIRS (Noob warning Take detailed photos before starting this)

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ddstoys:
With most Project Ems i have rebuilt have either stuffed score reel or stepper unit and without these working correctly the game just wont start. So on all ems this is the first thing i do to attempt to get it back to life.  Obviously yours will still be hanging from your machine unless you have enough patience to mark and unsolder all the wires (STUFF THAT) 
 There are a few types of steppers

1. Continuous which has one coil and steps in one direction   (Used mainly on features bonus scores etc)
2. Step up / Step down which has 2 coils one to step it up and one to step it down   (Mainly used for bonus scores etc)
3 Step up  / Reset which also has 2 coils ine to step up and one to reset to the start position  (used for player units and ball count etc)

If a game wont boot id look at steppers with two coils first as features shouldn't stop the game from starting.

Im using a Continuous stepper for the Demo but same rules apply for the reset or step down section as the step up section

Ford Fairlane:
 #*# will be watching this closely!!! maybe i can ask questions here instead of adding to my massive pro football thread  :lol

ddstoys:
Here are some photos of the stepper arms these guys do most of the work.

STEP 1 first thing i do is blow the unit out with compressed air or attack it with a dry paint brush to remove any unwanted   
            dust  bugs etc.

STEP 2 any leftover grease hard dirt etc i clean with a toothbrush dipped in metho preferably not your own especially around
            the pivot point

The second photo shows the build up grease that blowing and paint brushing didn't remove third show what a quick hit with motho on a toothbrush can remove

ddstoys:
STEP 3 make sure all these arms and pivot points move freely if not remove them and clean the shaft and the hole. To test
            these use your finger to gently pull against the spring they should easily move except maybe the ones that move the
            center cog.  This should move freely until it hits a cog on the wheel if this makes sense?

 Second and third picture show the arm removed from the shaft these are usually removed by removing a C  clip i like to call them a f**k clip as when they shoot off that what i usually say again clean the shaft and the hole metho on a cotton but works well for the hole and toothbrush or rag on the shaft.   Notice the Nylon bush on the arm don't lube these its not needed

Extra Ball:
ty for posting this, I am back in the land of the EM (await news of my next purchase  %$%) and will need to know this stuff.
 #*#

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