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Offline dell4uTopic starter
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coinmaster 4
« on: March 07, 2012, 04:22:20 am »
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looking for schematic for 70 coinmaster 4. Need to replace the transisters. It powers up but no sound. Can barely hear beeps with headphones.  

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« Last Edit: March 07, 2012, 04:57:37 am by dell4u »
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« Reply #1 on: March 07, 2012, 10:01:19 am »
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Welcome from New Mexico.

Why do you think the transistors have failed?

A machine that old, the first thing I would do would be to Replace all the associated Electrolytic Capacitors.    They love to dry out over time.

I may have the CM-5 schematic stashed away some place that could help you.

I'm sure the Audio section was the same.

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Offline dell4uTopic starter
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coinmaster 4
« Reply #2 on: March 07, 2012, 07:44:34 pm »
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thanks for the info. Did not think of the capacitors. Would be gratefull to see any schematics that you could show me.  thank you


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