Power System (on DC Controller PCA)
The AC, DC, and high voltage power supply circuits are all contained within the DC Controller PCA.
AC Power Distribution
The AC power circuitry supplies AC voltage whenever the power cord is connected to the AC power source. AC voltage is distributed to the DC power supply circuitry and to the AC driver circuitry, which controls AC voltage to the fusing assembly’s heating element.
DC Power Distribution
The DC power distribution circuitry, located on the DC Controller PCA, distributes
+5 V DC and +12 V DC as follows:
+5 V DC: | Formatter PCA |
| Photosensors |
| DC Controller Circuitry |
| Laser/Beam Detect Circuitry |
+12 V DC: | Motor |
| Scanner Motor |
| Solenoid |
+12VA DC: | High Voltage Power Supply |
Overcurrent/Overvoltage Protection
There are two overvoltage /overcurrent devices in this printer:
∙Fuse F101 provides overcurrent protection for the fusing system circuitry. To check or replace the fuse requires the removal of the DC Controller. Fuse 102 (found only on 110V units) provides overcurrent protection to the printer DC power supply circuitry.
∙In addition, the +12V DC and +5V DC power circuitry contains an overcurrent protection circuit which automatically shuts off the output voltage when an overcurrent condition occurs due to a short or abnormal voltage on the load side.
SleepMode
Instead of a power switch, the printer has a SleepMode function. After the printer has been idle for 15 minutes, it turns itself off by shifting to SleepMode. The front panel lights remain off, and the printer retains all printer settings and downloaded fonts and macros while in SleepMode.
5 - 6 Functional Overview