Printronix P4280, Руководство по обслуживанию

Страница: 122 / 298

5–40 Replacement Procedures
Motor Assembly, Platen Open (Figure 5–17 )
Removal
1. Prepare the printer for maintenance (page 5–3).
2. Remove the card cage fan assembly (page 5–26).
3. Remove the platen open belt cover (1) by squeezing the top and bottom
to release the plastic tabs from the slots in the side plate.
4. Loosen the motor mount screws (2).
5. Remove the platen open belt (3).
6. Loosen the 1/16 hex pulley set screw (4) and remove the motor pulley
(5).
7. Disconnect the platen motor cable connector (6).
8. Remove the motor mount screws (2) and nut plate (7).
9. Remove the platen open motor assembly (8).
Installation
1. Position the platen open motor assembly (8) with wires toward the rear,
the nut plate (7), and install the motor mount screws (2) finger tight.
2. Install the motor pulley (5), align it with the platen pulley (9), and
tighten the set screw (4) to 9
±
2 inch–pounds.
3. Connect the platen motor cable connector (6).
4. Install the platen open belt (3).
5. Close the forms thickness lever all the way.
6. Make sure the collar of the platen pulley (9) clears the left ribbon guide
with the platen fully closed.
a. If not, rotate the platen pulley (9) until the collar clears the left
ribbon guide and tighten the platen pulley set screw (10). Go to
step 7.
b. If the collar clears the ribbon guide with the forms thickness
lever closed, go to step 7.
7. Using a force gauge, apply 10 pounds of tension to the platen open
motor shaft (8) by pulling away from the large platen pulley, reduce
tension to 5 pounds and torque the motor mount screws (2) to 11
±
2
inch–pounds.
8. Check the platen gap (page 4–14), and adjust if necessary.
9. Snap the platen open belt cover (1) into the slots in the side plate.
10. Install the card cage fan assembly (page 5–26).
11. Return the printer to normal operation (page 5–86).