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Service Guide
29
Error Codes and
Messages
Rear panel LED error codes
The rear panel LEDs are located on each side of the rear panel DIP switches.
The
left LED represents the operation of the PostScript firmware. The right LED represents
operation of the main board’s print engine firmware.
During the POST tests, the two
LEDs toggle back and forth for each successful pass through each SDRAM test. A
failure in the power on self tests is indicated by the left LED (the PS LED) flashing
in a specific pattern of long and/or short flashes and repeated indefinitely. A long
flash represents a 5, while a short flash is a 1. For example, a long flash followed
by 4 short flashes is 5 + 4 = 9. If the left LED repeatedly flashes in the same
sequence, then the PostScript processor has encountered an error and is looping.
For the Phaser 850 printer
, when a fatal error occurs, the front panel Error LED
flashes the same pattern as the PS LED. The possible LED-encoded error codes
are listed in the following table. Other failures are indicated by the failure being
printed on the Startup Page.
After successful power-up, the left LED flashes at a regular “heartbeat” rate. The
front panel
Power
light turns on, the
Error
light flashes, and the LCD is cleared.
Table 3 Main board power-up self-test error codes
Left LED
flashes
Long flash =5
Short flash=1
2L+1S=11
Meaning
Details
1
not used
2
SDRAM
SIMM
Presence
This test verifies the presence of both SDRAM
SIMMs. If both SDRAM SIMMs are missing the
resultant error indication is 2 short flashes from the
left LED.
3
SDRAM bank
0
This test verifies DRAM bank 0 in the DRAM DIMM
located in Position 1 (closest to the rear panel)
4
SDRAM bank
1
This test verifies DRAM bank 1 in the DRAM DIMM
located in Position 1 (closest to the rear panel)
5
SDRAM bank
2
This test verifies DRAM bank 0 in the DRAM DIMM
located in Position 2 (farthest from the rear panel)
6
SDRAM bank
3
This test verifies DRAM bank 1 in the DRAM DIMM
located in Position 2 (farthest from the rear panel)
7
not used
8
not used
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 ...