Casio UP-250 Technical Manual page 94

Action 3
Action 3
Turn the printer power off.
Does external power
supply have proper output
No
voltage rating? (approx. 40 V
in no-load condition)
Replace external
power supply.
Yes
No
OK?
Yes
END
Replace main PCB.
Yes
OK?
END
No
Replace printer mechanism assembly.
END
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