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134 Chapter 3 – Power supply EN
Overcurrent/overvoltage
There are two overvoltage devices in this printer:
• Fuse F101 provides overcurrent protection for the fixing system
circuitry. To check or replace the fuse requires the removal of the
ECU. Fuse 102 (found only on 110 V units) provides overcurrent
protection to the printer DC power supply circuitry.
• In addition, the +12 VDC and +5 VDC power circuitry contains an
overcurrent protection circuit which 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.