Service manual

Service Manual ix
8 FRU Disassembly/Assembly
Required tools 8-1
Lower tray assembly 8-2
Printer cabinet panels 8-3
Paper-feed module 8-5
Accessing the pick roller, aligning roller, and the lower feed roller 8-6
Paper-pick roller, clutch, and paper-empty flag 8-9
Lower aligning roller, clutch, and paper-pass sensorþ1þflag 8-11
Removing the upper aligning roller 8-13
Removing the feedþroller 8-14
Removing the exitþrollers 8-15
Bail roller assembly 8-16
Thermal head 8-17
Drum 8-19
Motors 8-23
Paper-feed motor 8-23
Drum motor 8-24
Transfer roll take-upþmotor 8-25
Thermal head lift motor 8-27
Sensors and switches 8-29
Paper-pass sensorþ1 and paper-empty sensor 8-29
Thermal head position sensors 8-29
Transfer roll mark sensors 8-29
Paper-pass sensorþ2 and trayþsensor 8-30
Transfer roll lowþsensor 8-33
Paper clamp sensor 8-34
Card cage and power supply 8-35
Circuit boards 8-37
Power supply circuit board 8-37
Paper-feed circuitþboard 8-39
Engine control board 8-39
Card cage interconnect board 8-41
I/O board 8-42
Image processor board 8-43
RAM SIMM 8-44
Font module 8-45