Overview; Platen Gap Adjustment - Epson LX-300+ Service Manual

LX-300+/1170

5.1 Overview

This chapter explains the adjustment required after disassembling the printer.

5.1.1 Platen Gap Adjustment

Platen gap adjustment is required at the following cases.
o
Printhead is replaced.
o
Carriage is replaced.
o
CR guide shaft is removed.
o
Parallelism adjust bushing is removed.
o
Printing is too thin.
o
Ink ribbon often gets jammed.
Follow the steps below before performing the platen gap adjustment.
1. Remove the upper housing. (Refer to Ch4.)
2. Set the PG adjust lever to "0".
3. Remove the printhead and remove the ribbon mask.
4. Re-install the printhead.
5. Follow the procedure in the flowchart below for the adjustment.
Table 5-1. Adjustment Method
Platen Gap Setting
Thickness gauge 0.40mm falls down by its own weight: OK
0415 ± 0.015mm
Thickness gauge 0.43 mm does NOT fall down by its own
weight: NG
Table 5-2. Parallelism Adjust Bushing
Rotational direction of the parallelism adjust bushing
Platen side
Front side
Adjustment
Judging Method
Platen gap
Widen
Narrowed
START
Move the carriage unit to the
left end.
Is the platen gap
within the range of the
setting?
Move the carriage unit to the
right end.
Is the platen gap
within the range of the
setting?
Move the carriage unit to the
center.
Is the platen gap
within the range of the
setting?
END
Figure5-1. Platen Gap Adjustment
Overview
Revision C
Adjust the platen gap at the
left end.
Adjust the platen gap at the
right end.
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