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5.5.11 Carriage Motor
1. Remove the cabinet (see 5.5.1).
2. Remove the 2 screws in the PCB upper corners or, if the PCB has button fasteners, pry each upper corner
free and fold the PCB down.
3. Disconnect the carriage motor cable from J2 of the Main PCB.
4. Remove the 4 screws fastening the carriage motor to the metal box.
5. Transfer the carriage motor pulley to the new motor. Leave a .01" (0.2mm) gap between the pulley hub and
the motor flange.
6. Assemble the 4 screws to the new motor. The DP6 uses a second flat washer on the upper screw closest
to the transformer. The DP7 uses shorter screws on the side closer to the transformer. Carefully install the
motor in the box and fasten but do not tighten the screws.
7. Insure that the transformer cables are not pinched by the motor. With the carriage near the right side of the
printer, locate the motor vertically so that the carriage drive belt is horizontal from the motor pulley to the
carriage clamp surface and tighten the motor mounting screws.
8. Tension the carriage belt (see 5.4.2).
9. Set the LEFT HOME (see 5.4.4), LEFT MARGIN and CAR ALIGN parameters (see 5.2).
10. Reverse the procedure in steps 1 to 3.
5.5.12 Document Drive Belt
1. Remove the cabinet (see 5.5.1).
2. Slide the belt between the 2 drive rollers off the rear roller pulley
3. Slide the document drive belt off the document motor pulley.
4. Install the new document drive belt and the old connecting belt.
5. Tension the drive belt (see 5.4.3).
5.5.13 Document Motor
1. Remove the cabinet (see 5.5.1).
2. Remove the 2 screws in the PCB upper corners or, if the PCB has button fasteners, pry each upper corner
free and fold the PCB down.
3. Disconnect the Keypad/Display cable from J7 of the Main PCB.
4. Remove the 5 screws fastening the metal box top to the box and remove the box top.
5. Disconnect the document motor cable from J3 of the Main PCB.
6. Remove the 3 screws fastening the document motor to the metal box.
7. Transfer the document motor pulley to the new motor. Leave a .02" (0.5mm) gap between the pulley hub
and the motor flange.
8. Install the new motor by reversing the procedure in steps 2 to 6.
9. Slide the document drive belt onto the motor pulley and tension the belt (see 5.4.3).
5.5.14 Auto Alignment Skew Sensor
1. Remove the two nuts fastening the skew sensor to the input guide.
2. Disconnect the skew sensor from the input sensor by pulling it upward
3. Install the lower sensor insulator, the new skew sensor and the upper sensor insulator.
4. Adjust the TOP, INDEX and EJECT HOLD so that inserted documents are correctly positioned (See 5.2).
Record any new values on the parameter label.
5. Calibrate the skew sensor (See 5.4.14).