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EN AC and DC power distribution 131
3
Overcurrent/overvoltage
There are two overvoltage devices in this printer:
• Fuse F101 provides overcurrent protection for the fusing system
circuitry. Checking or replacing the fuse requires the removal of the
ECU. Fuse F102 provides overcurrent protection to the printer DC
power-supply circuitry.
• In addition, the +24 VDC and +3.3 VDC power circuitry contains an
overcurrent protection circuit that automatically shuts off the output
voltage when an overcurrent condition occurs as a result of a short
or an abnormal voltage on the load side.