Tektronix Phaser 840, Quick Reference Manual

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Phaser 840 Color Printer
Figures
The Phaser 840 printer (shown with optional
High-capacity Paper Tray Assembly) 1
Internal features of the print engine 6
Circuit boards of the print engine (right front view) 7
Circuit boards of the print engine (left-rear view) 8
The printer’s I
2
C bus 9
Printhead maintenance system of the print engine 10
Sensors and switches on the right side of the print engine 11
Sensors and switches on the left side of the printer 12
Solenoids and clutches on the print engine 13
Features of the main board 14
Printer front panel 17
Printer rear panel 19
Attaching the service load connector to J250 41
Setting process belt tension 62
Setting exit roller drive belt tension 63
Setting the Y-axis belt tension 65
Attaching the digital gap indicator 66
Spacing the printhead to the drum 67
Aligning (timing) the cap/wipe/purge assembly drive belts 69
Setting the drum position encoder gap 71
Adjusting the transfix roller pressure springs 73
Adjusting the x-axis scale adjustment 74
Connecting the vacuum gauge to the printer 75
Resetting print engine NVRAM menu item 84
Clearing PostScript NVRAM menu item 85
Removing the main board 88
Removing the power supply 89
Removing the power control board 90
Removing the paper/drum heater 91
Remove the upper feed roller assembly (left side) 92
Removing the upper feed roller assembly (front) 93
Removing the drum transfix assembly (left side) 95
Removing the drum/transfix assembly (right side) 97
Marking the drum home flag sensor alignment 99
Removing the drum position sensor assembly 100
Plugging the reservoir holes 101
Removing the printhead 103
Removing the x-axis motor and drive assembly 104