4–14 Adjustment Procedures
Platen Gap Adjustment (Figure 4–7 )
1. Prepare the printer for maintenance (page 4–2).
2. Open the printer cover.
3. Remove the shuttle cover assembly (page 5–24).
4. Remove the ribbon.
5. Loosen the platen open belt (page 4–4, steps 3. and 4.).
6. Raise the forms thickness lever (1) to the fully open position.
CAUTION
Do not force the platen against the feeler gauge. Damage to the printer
will result.
7. Insert a 0.010 inch flat feeler gauge (2) straight down between the
hammer bank cover plate (3) and ribbon mask (4), within four hammer
positions of the left end of the hammer bank.
8. Gently close the forms thickness lever (1). As the platen is closing,
gently slide the feeler gauge up and down, keeping it between the
hammer tip and ribbon mask. If the feel is too tight when the platen is
being closed, adjust the set screw (5) at the end of the platen
counterclockwise. If the feel is too loose, adjust the set screw clockwise.
With the forms thickness lever closed all the way, the feeler gauge
should contact both the tips and the ribbon mask and move with light
friction. Shift the gauge slightly to verify.
9. Repeat steps 6. through 8. at the right end of the hammer bank.
10. After adjusting both sides, check the gap again at both ends. Readjust if
necessary.
11. When the platen gap is correct at both ends of the platen, adjust the
platen open belt (page 4–4).
12. Install the shuttle cover assembly (page 5–24).
13. Return the printer to normal operation (page 4–22).
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