Xerox Phaser 840, Service Manual

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1 - 28 Phaser 840/850/860/8200 Color Printer - Service Manual
Rear Panel Status LEDs
Two LEDs on the rear panel indicate the status of the printer’s CPU functions: PostScript
processing and print engine control or diagnostics.
1.
PostScript health light (LED) normally blinks once per second.
2.
Engine health light (PE LED) normally blinks twice every 2.5 seconds.
3.
During the first minute of power-up the LEDs are used to indicate diagnostic progress
refer to "System power-up sequence", on page 3-76.
4.
If the LEDs stop blinking for more than a minute refer to the topic "Error Codes and
Messages", on page 2-37.
5.
If the LEDs are blinking in a repeating pattern, other than normal operating health
status as described, refer to the topic "Error Codes and Messages", on page 2-37.
DIP Switches
Four DIP switches allow you to reset the printer or place the printer in different operating
modes. You must set the switches before power is turned on to enter the selected mode.
Table 1-6 Rear panel DIP switch settings
Function Switch 1 Switch 2 Switch 3 Switch 4
Normal operating mode UP UP UP* UP
Service mode DOWN UP UP UP
Reset printer UP* UP* UP* DOWN
then UP**
Manufacturing mode (Bypass
mode) UP DOWN UP* UP
Development mode (engineering
use only) DOWN DOWN DOWN* UP
Recovery mode (engineering use
only) DOWN UP DOWN UP
* Recommended DIP switch postion.
** If DIP switch 4 is left in the down position the printer will not turn off.