List of Figures Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Printer light patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Scanner control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 Basic configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 Printer unit functional block diagram . . . . . . . . . . . . . . . . . . . . . .43 ECU loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 High-voltage power supply circuit . . . . . . . . . . . . . . . . . . . . . . . .47 Image formation block diagram . . . . . . . .
. . . . . . . . . . . . . . . . . .51 Simplified paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53 Simplified scanner document path . . . . . . . . . . . . . . . . . . . . . . . .57 General timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59 Removing the paper guides . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64 Removing the optional scanner unit . . . . . . . . . . . . . . . . . . . . . . .65 Opening the scanner unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 Removing the Contact Image Sensor (continued on next page) .67 Removing the Contact Image Sensor (continued) . . . . . . . . . . .
.68 Disconnecting the CIS wire connector . . . . . . . . . . . . . . . . . . . . .69 Opening the printer door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 Disconnecting the stabilizer bars . . . . . . . . . . . . . . . . . . . . . . . . .71 Storing the stabilizer bars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72 Removing the paper deflector . . . . . . . . . . . . . . . . . . . . . . . . . . .73 Removing the door from the hinge mechanism (continued on next page) 74 Removing the cover from the hinge mechanism (continued) . . . .75 Removing the stabilizing pods . . . . . . . . . . . . . . . . . . . . . . . . . . .76 Removing the screws on the back cover .
. . . . . . . . . . . . . . . . . .77 Removing the back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78 Removing the paper guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79 Removing the front cover (continued on next page) . . . . . . . . . .80 Removing the front cover (continued) . . . . . . . . . . . . . . . . . . . . .81 Stabilizer bars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82 Removing the printer laser/scanner cover . . . . . . . . . . . . . . . . . .83 Disconnecting the scanner assembly cables . . . . . . . . . . . . . . . .84 Releasing the output roller (continued on next page) . . . . . . . . .
.85 Releasing the output roller snaps . . . . . . . . . . . . . . . . . . . . . . . . .86 Removing the torsion screws on the delivery assembly . . . . . . . .87 Removing the delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . .88 Paper Exit Sensor Flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89 Metal Clips Holding Fusing Element . . . . . . . . . . . . . . . . . . . . . .90 Reassembly of fusing element clips . . . . . . . . . . . . . . . . . . . . . . .91 Releasing the fusing element cable connection, left side . . . . . . .92 Releasing the fusing element cable connection, right side . . . . .93 Removing the fusing element . . . . . . . . . . . . . . . .
. . . . . . . . . . . .94 Removing the motor cable connection to the gear train cover . . .95 Removing the gear train cover . . . . . . . . . . . . . . . . . . . . . . . . . . .96 Removing the gear train motor . . . . . . . . . . . . . . . . . . . . . . . . . . .97 Removing the solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98 Removing the pressure roller (continued on next page) . . . . . . .99 Removing the pressure roller . . . . . . . . . . . . . . . . . . . . . . . . . . .100 Changing the pickup roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102 Accessing the paper pick-up assembly area . . . . . . . . . . . . . .
.103 Removing the paper pick-up assembly cover . . . . . . . . . . . . . .104 C4224-90962 183