Service Manual
xi
Circuit boards 8-38
Power supply circuit board 8-38
Engine control board 8-40
Paper-feed circuit
board 8-41
Card cage interconnect board 8-42
I/O board 8-43
Image processor board 8-44
RAM SIMM 8-45
Ethernet card 8-46
9
Checks and Adjustments
Required tools summary 9-1
Printing test patterns 9-2
Printer self-checks 9-4
Thermal head motor check 9-5
Power supply thermal head voltage (VH) check 9-5
Lower Tray Assembly connection test 9-6
Paper-path check 9-7
Top loss adjustment 9-8
Leading edge (top) margin adjustment 9-10
Switch and interrupt sensor checks 9-12
Tray select 9-14
Calibrating the reflective sensors 9-15
Pick roller cleaning 9-15
Adjusting for best print quality 9-16
Thermal head temperature adjustment 9-16
Thermal head skew (to correct speckle and wrinkle) 9-18
VH current compensation adjustment 9-20
Drum belt tension adjustment 9-22
Head lift motor belt tension adjustment 9-23
A
Field Replaceable Units List
B
Test Patterns
C
Wiring Diagrams
D
Test Pattern Generator
Index