![background image](http://html.mh-extra.com/html/tektronix/phaser-840/phaser-840_quick-reference-manual_1078590035.webp)
Service Guide
25
Error Codes and
Messages
Rear panel LEDs 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.
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 is turned on, the
Error
light is flashed, 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 for 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 0 (closest to the rear panel)
4
SDRAM bank
1
This test verifies DRAM bank 1 in the DRAM DIMM
located in Position 0 (closest to the rear panel)
5
SDRAM bank
2
This test verifies DRAM bank 0 in the DRAM DIMM
located in Position 1 (farthest from the rear panel)
6
SDRAM bank
3
This test verifies DRAM bank 1 in the DRAM DIMM
located in Position 1 (farthest from the rear panel)
7
not used
8
not used
Summary of Contents for Phaser 840
Page 46: ...36 Phaser 840 Color Printer ...
Page 95: ...Service Guide 85 Clearing PostScript NVRAM menu item ...
Page 96: ...86 Phaser 840 Color Printer ...
Page 121: ...Service Guide 111 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 ...
Page 125: ...Service Guide 115 Figure 3 Paper path FRUs 0388 16 2 1 5 11 10 9 12 6 4 3 7 13 8 ...
Page 127: ...Service Guide 117 Figure 4 Motors and fans FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 129: ...Service Guide 119 Figure 5 Circuit boards FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 13 12 ...
Page 131: ...Service Guide 121 Figure 6 Solenoids and clutches FRUs 4 5 3 2 1 0388 23 ...
Page 137: ...Service Guide 127 Figure 9 High capacity PaperTray 0388 65a 1 2 ...
Page 142: ...132 Phaser 840 Color Printer ...
Page 154: ...144 Phaser 840 Color Printer ...