HP (Hewlett-Packard) LJ 4000T Printer User Manual


 
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.