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Date: Mon, 08 Oct 2012 20:18:11 -0700
From: John Robertson <s...@flippers.com>
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Subject: Re: Can I replace a 0 Ohm resistor with a 1K Ohm resistor?
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calabri...@yahoo.com wrote:
> On Monday, October 8, 2012 8:49:32 PM UTC-4, (unknown) wrote:
>> On Monday, October 8, 2012 7:40:18 PM UTC-4, (unknown) wrote:
>>
>>> I tested the w4 resistor (0 Ohm 1/4 watt) on my earthshaker and it appears bad.
>>
>>
>>
>>
>> What are you seeing that you think a 0 Ohm resistor (jumper) is bad???
>>
>>
>>
>> Mamushka
> 
> Pop bumpers and shaker motor stopped working.  Grounded the solenoids but to no avail.  Jumped power to the solenoids and they worked.  Tested the resistors and  w4 had a different reading than w1 through w5.  I replaced w4 (0 Ohm resistor) with a lead but still not working.

And the machine is?

Interesting list of tests - grounding the coils didn't work, but they 
would work when you provided alternate power? Have the coils got power 
when the game is powered on? Should be anything over 24VDC. Should see 
the same voltage at the tabs of the driver transistors.

If no voltage then you have a power issue, fuse, wiring, connectors, 
check if there is a solenoid power defeat switch by the front door hinge...

John :-#)#

-- 
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  John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
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