Platen Gap Parallelism Adjustment - Epson SQ-1170 Service Manual

This chapter describes the various adjustments you should make after you disassemble or replace any
parts or components that require adjustment. Needless to say, you should also make adjustment in any
case if the printer does not function properly or print quality is not good enough.
Other conditions that require adjustment are described in this chapter.
Disconnect the power supply cable from the printer whenever you work with the printer. (Unless
otherwise specified)

4.1 PLATEN GAP PARALLELISM ADJUSTMENT

This adjustment is to make the distance between the platen and the printhead (platen gap) uniform at
column 1 and column 136 (column 80 in case of 80-column printer). Since it has already been adjusted
in the assembling line before shipment, you need not adjust it. But if you have changed the setting of
LEVER, PARALLEL, ADJUST when repairing this printer, you should make this adjustment.
[Step 1] Remove the printhead. (Refer to section 3.2.2.)
[Step 2] Install the dial gauge base to the carriage.
[Step 3] Set the dial gauge to the dial gauge base (# F590), and touch the probe to the platen so that
the long needle indicates 15-20 divisions on the scale. Then fix the dial gauge (# E603) to
the dial gauge base with a hexagonal screw.
Dial Gauge Base
Long Needle
Probe
Figure 4-1. Setting of Dial Gauge
W A R N I N G
Platen
/
4-1
REV.-A
Screw