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Drum Rotation Functional Check . . . . . . . . . . . 7-50
High Voltage Power Supply Assembly . . . . . . . . 7-51
Interface Troubleshooting . . . . . . . . . . . . . . . . . 7-52
Communications Check . . . . . . . . . . . . . . . . 7-52
Test Message . . . . . . . . . . . . . . . . . . . . . . 7-52
AUTOEXEC.BAT Standard Configurations . . . . . 7-53
Parallel DOS Commands . . . . . . . . . . . . . . . 7-53
Serial MS-DOS Commands . . . . . . . . . . . . . . 7-53
Communications Checks . . . . . . . . . . . . . . . . 7-54
MIO Troubleshooting . . . . . . . . . . . . . . . . . . . 7-56
Troubleshooting Hints . . . . . . . . . . . . . . . . . 7-56
Explanation of Self Test Printout . . . . . . . . . . . 7-57
Troubleshooting Aids . . . . . . . . . . . . . . . . . . . 7-59
Component Locations . . . . . . . . . . . . . . . . . . 7-59
Repetitive Defect Template . . . . . . . . . . . . . . 7-67
Voltage Test Points . . . . . . . . . . . . . . . . . . 7-69
Measuring the DC Voltage Levels . . . . . . . . . . . 7-69
8 Parts and Diagrams
How To Use the Parts Lists . . . . . . . . . . . . . . . . . 8-1
Parts Lists and Illustrations . . . . . . . . . . . . . . . 8-2
Accessory Parts . . . . . . . . . . . . . . . . . . . . . . 8-33
SIMM Memory . . . . . . . . . . . . . . . . . . . . . 8-38
Miscellaneous Parts and Accessories . . . . . . . . . 8-39
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . 8-40
A Duplexer
Functional Overview . . . . . . . . . . . . . . . . . . A-2
Duplex Printing . . . . . . . . . . . . . . . . . . . . . A-3
Switchback Assembly . . . . . . . . . . . . . . . . . . A-3
Holding Tray . . . . . . . . . . . . . . . . . . . . . . A-3
Electrical Overview . . . . . . . . . . . . . . . . . . . A-5
Installing the Optional Duplexer . . . . . . . . . . . . . A-6
Removal and Replacement . . . . . . . . . . . . . . . . A-8
Required Tools . . . . . . . . . . . . . . . . . . . . . A-8
Removing the Covers . . . . . . . . . . . . . . . . . . A-9
Removing the Switchback Covers . . . . . . . . . . . A-9
Removing the Side Cover on Power Side . . . . . . . A-10
Removing the Side Cover on Gear Side . . . . . . . . A-11
Removing the Back Cover . . . . . . . . . . . . . . . A-13
Removing the Front Cover . . . . . . . . . . . . . . . A-13
Removing Internal Duplexer Components . . . . . . . A-14
Removing the Fan/Motor/Solenoid/Sensor . . . . . . . A-14
Removing the Switchback Paper Guide . . . . . . . . A-15
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