Tektronix Phaser 840, Quick Reference Manual

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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