Tektronix PHASER 380, Service Manual

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viii Phaser 380 Color Printer
Print process in operation 5-20
Printhead tilt 5-20
Paper pick and measurement 5-22
Drum preparation 5-24
Printing 5-26
Transfixing, stripping and exiting 5-30
Printer self-maintenance 5-33
Printhead maintenance cycle 5-33
Paper preheater cleaning 5-36
Pick roller cleaning 5-36
Transfix roller oiling 5-37
Drum cleaning (chase page) 5-37
Power-down cycle 5-38
6 Troubleshooting
System power-up sequence 6-1
Print engine troubleshooting 6-4
Verifying main board CPU operation 6-4
Verifying print engine operation by using its test print 6-6
Verifying power supply operation 6-6
Measuring AC voltages 6-6
Inspecting the power supply fuses 6-7
AC triac drive signal 6-8
Testing for a shorted DC load 6-9
Testing motor and solenoid resistances 6-10
Media jams and the paper path 6-11
Media-based problems 6-11
Paper-pick errors 6-11
Print transfer jams 6-12
Checking the process motor and drive train 6-12
Media skews passing through the paper path 6-13