Technical information

These procedures apply to the Main Drive Belt and the Rewind Spindle Drive Belt.
1. Turn the printer OFF and remove the power cord.
2. Remove the media and ribbon.
3. Remove the Rear Cover, Front Control Panel Assembly, Media Sensor
Assembly and the Main Logic Board. See previous procedures if necessary.
NOTE: Scribing a mark into the outer edge of the Idler Pulley and into the printer
frame, prior to performing step # 4, may help when adjusting the belt tension.
4. See Figure 5.25 or 5.26 and loosen the shoulder bolt holding the Idler
Pulley in position until the pulley freely moves up and down.
5. Remove the appropriate old Drive Belt and install the new one.
6. Hook a 2200 gram spring scale to the new belt as shown in Figure 5.25 or
5.26, and carefully pull up on the Idler Pulley to increase belt tension.
7.
Main Drive Belt Adjustment When a scale reading of 900 grams (2 lbs.) ±
225 grams (1/2 lb.) creates a deflection of 1/4 inch, tighten the shoulder bolt
to a torque of 20 inch-lbs.
Rewind Spindle Drive Belt Adjustment When a scale reading of 1800
grams (4 lbs.) ± 225 grams (1/2 lb.) creates a deflection of 1/4 inch, tighten
the shoulder bolt to a torque of 20 inch-lbs.
8. Reinstall the Main Logic Board, Media Sensor Assembly, Front Control
Panel Assembly and Rear Cover.
9. Reload Media and Ribbon.
10. Reconnect power cord, power-up, and test printer.
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