Platen Gap (Pg) Adjust Mechanism - Epson Stylus COLOR 1520 Service Manual

Operating Principles

2.2.5 Platen Gap (PG) Adjust Mechanism

The PG adjust mechanism, located at the top right of the printer mechanism, allows the user to set the
proper platen gap (distance between paper and nozzle surface) for the paper thickness to prevent ink
smudging. The PF Adjustment mechanism consists of the PG adjust lever, CR guide shaft, and
parallelism adjust bushings. Shifting the lever from "0" to "1" turns the CR guide shaft that joins to the
lever. The joint for the parallelism adjust bushing and CR guide shaft has an eccentricity toward the guide
shaft, which moves the guide shaft from or toward the platen. With this movement, the platen gap
changes from wide to narrow or vice versa.
Table 2-6. Platen Adjust Lever positions
Paper Type Adjust lever Position PG Adjustment Value
Cut Sheet, OHP Sheet, Rear 0
Label, Continuous paper
Envelope ,Card, Index card Front + 0.7 mm
Figure 2-8. Platen Gap Adjustment Mechanism
2-9
Rev. A