Platen Gap - Printronix P9012 Maintenance Manual

Platen Gap

(Figure 5–7)
1. Disconnect the AC power cord from the rear of the printer. Open the top
cover. Remove paper from the printer.
2. Remove the ribbon deck assembly as described on page 6–8 of Chapter
6, Replacement Procedures.
3. Raise the forms thickness adjustment lever (1) to the open position.
Hammer tips may be damaged when subjected to a sideways force.
4. Measure the platen gap, as follows:
Take care not to damage the hammer bank cover with the feeler gauge.
a. Insert a flat feeler gauge (2) between the platen (3) and the hammer
b. Carefully lower the forms thickness adjustment lever until the platen
5. Repeat step 4 for the right end of the hammer bank.
6. If the platen gap is incorrect:
a. Adjust the two set screws (6) as required. Note that 1/4 turn equals
b. Repeat steps 4 through 6.
7. Install the ribbon deck assembly as described on page 6–8 of Chapter 6,
Replacement Procedures.
8. Install paper. Close the top cover and connect the AC power cord.
5–18
tips (4) in the ribbon path of the hammer bank cover (5) within six
hammer positions of the left end of the hammer bank. If the forms
thickness adjustment lever is in the "A" position, use a 0.009 inch
feeler gauge. When the lever is fully closed, use a 0.007 inch gauge.
just contacts the feeler gauge with the lever at the "A" setting. The
feeler gauge should move with only slight friction. Make sure the
gauge is vertical and in the same plane as the hammer tips.
about 0.008 inch.
CAUTION
CAUTION
Alignments and Adjustments