MPU4 - REPAIR LOG 2(1).pdf

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4.02.2021

MPU4 - REPAIR LOG

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Repair Log… (10/4/11)

MPU4 – PSU Fault

Fault diagnosis.

Machine continually resets. Initial inspection.

Electro-caps are probably 20+ years old.

C2 is dented. The whole set-up looks grim.

Remove the fixing screws and remove the power supply

pcb. There are 3 electro caps which need replacing,

C1 = 4700uF - 63VDC

C2 = 15000uF - 25VDC

C3 = 1000uF - 16V

If you are unsure about polarity, check the psu schematic

here

and buzz out the cathode to the red connector.

Repaired.

www.booze.net/page7.html

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