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Carriage drive belt
Service check
CAUTION:
<2-25> High temperature; switch off the printer and allow at least 20 minutes for parts in this area to cool before
handling.
1. Turn off the printer.
2. Open the top cover and remove the ribbon.
3. Move the printhead to the right side stop.
4. Using a push-pull scale (such as P/N 44D9056) to check the belt tension, apply pressure to the upper half of
the belt (at a point midway between the printhead and the left side frame) until it begins to touch the bottom
half of the belt. To accurately measure the tension, it is critical for the raised surfaces of the teeth to align, as
shown in Figure 10.
The correct force required to bring the top of the belt into contact with the bottom of the belt is 1.1 ±0.05 kg
(2.4 ±0.12 lb).
5. If the measurement is correct, the service check is complete. Stop here and return to the step that sent you
here.
If the measurement is not correct, go to the adjustment.
Apply
Force
Here
Adjusting
Screw
Figure 10. Carriage belt. (Viewed From Top) - Teeth must align during measurement.
Chapter 5. Removals, service checks and adjustments
150
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