Datasheet

44895L Rev. 3 3/15/04 S400/S600 Maintenance Manual Page 4-53
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1. Turn the printer Off (O), and remove the AC power cord and the data cable.
2. Remove media and ribbon.
3. Remove the main door, rear cover, and control panel assembly.
4. Remove the main logic board and media sensor assembly.
5. Refer to Figure 4-45 on page 4-54. Loosen the shoulder bolt holding the idler pulley
in position until the pulley freely moves up and down.
6. Remove the main drive belt.
7. Remove the screw securing the platen roller ground chain assembly to the main
frame.
8. Refer to Figure 4-29 on page 4-36. Remove the tear-off plate.
9. Remove the platen roller by lifting up on the end with the platen pulley and pivoting
the platen bearings out of the slots.
10. Remove the platen pulley from the platen roller.
11. Install the platen bearings, nylon spacer washers, ground chain assembly, and the
platen pulley on the replacement platen roller as shown in Figure 4-45.
12. Reinstall the platen roller by sliding the outside platen bearing into its cutout and
dropping the inside platen bearing into its slot.
13. Reattach the ground chain assembly to the main frame.
14. Reinstall the main drive belt.
15. Adjust the main drive belt tension.
16. Reinstall the main logic board and media sensor assembly.
17. Reinstall the tear-off plate, control panel assembly, rear cover, and main door.
18. Reload media and ribbon.
19. Reconnect AC power cord and data cable. Turn the printer On (l), and test for
proper operation.
Note • Scribing a mark into the main frame indicating the position of the idler pulley
prior to performing step 5 may help when adjusting the belt tension.
Note • Refer to Figure 4-46 on page 4-54. Ensure the platen bearings are oriented with
the off-center holes at the top when installed.