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Service Guide
v
Contents
General Information
1
Phaser 840 printer overview 2
Solid inks 3
About RAM upgrades 3
Memory considerations 4
Print engine assemblies 6
The main board 14
Combination sensors and their meanings 15
Media tray type sensing 15
Front panel 16
Rear panel 18
Regulatory specifications 24
Error Codes and Messages
25
Rear panel LEDs error codes 25
Error messages 28
Troubleshooting
37
System power-up sequence 37
Verifying main board CPU operation 39
Verifying print engine operation by printing its startup page 39
Verifying power supply operation 39
Measuring power supply voltages 40
Inspecting the power supply fuses 40
Testing for shorted drivers 41
Testing for a shorted motor 42
Testing motor and solenoid resistances 42
Media jams and the paper path 43
Media-based problems 43
Paper-pick errors 43
Print transfer jams 44
Checking the process motor and drive train 45
Media skews passing through the paper path 45
Printing and print quality problems 46
Streaks or lines across the print 46
Streaks or lines down the print 46
Missing ink or light colored ink band running length of print 47
Scratches parallel to the long axis of printing, particularly with film 48
White portion of print is colored 48
Color is uneven 49
Not printing 49
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 ...