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Service Guide
21
Health LEDs
Two health LEDs indicate the status of the printer’s CPU functions: PostScript
processing and print engine control.
■
Blinking: The printer is operating normally. Both LEDs blink
irregularly during diagnostics.
If a soft error occurs, image processing occurs, but in a reduced capacity.
Soft failures include failure of expansion memory DIMMs or any of the
interface ports. When a soft error occurs, the printer automatically
prints a Startup Page listing the error.
■
On or Off, or blinking a coded error indication: A hard error condition has
occurred that would keep the image processor board from operating.
Refer to the topic “Error Codes and Messages” on page 29 for the
meaning of a coded indication.
Switches
Four DIP switches allow you to reset the printer or place the printer in different
operating modes.
Table 2 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
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
Summary of Contents for Phaser 840
Page 11: ...xii Phaser 840 and 850 Color Printers ...
Page 65: ...54 Phaser 840 and 850 Color Printers ...
Page 101: ...90 Phaser 840 and 850 Color Printers ...
Page 125: ...114 Phaser 840 and 850 Color Printers ...
Page 134: ...Service Guide 123 Clearing PostScript NVRAM menu item ...
Page 135: ...124 Phaser 840 and 850 Color Printers ...
Page 166: ...Service Guide 155 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 9 9 ...
Page 170: ...Service Guide 159 Figure 3 Paper path FRUs 0388 80 2 1 5 11 10 9 12 6 4 3 7 13 8 11a 11b ...
Page 172: ...Service Guide 161 Figure 4 Motor and fan FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 174: ...Service Guide 163 Figure 5 Circuit board FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 81 12 7a ...
Page 176: ...Service Guide 165 Figure 6 Solenoid and clutch FRUs 4 5 3 2 1 0388 23 ...
Page 182: ...Service Guide 171 Figure 9 High capacity PaperTray 0388 65a 1 2 ...