Mechanical Adjustment; Pg Adjustment - Epson Stylus Photo RX700 Service Manual

EPSON Stylus Photo RX700

5.2 Mechanical Adjustment

This section describes the mechanical adjustments required when specified
components/parts have been reinstalled or replaced.

5.2.1 PG Adjustment

Described below is the platen gap (PG) adjustment.
Purpose
Adjust the distance between the head surface and the Paper Guide Front Assy
properly and adjust the parallelism on the 0th column side and on the 80th
columns side to ensure reliable print quality.
Once the Carriage Assy and/or Adjustment Bushes have been removed or
whenever necessary for any other reason, make this adjustment to correct the
deviation of the platen gap.
Things to be used
Thickness gauge: 1.2 ± 0.1 mm
Phillips screwdriver
C A U T I O N
The thickness gauge to be used must be free from dust and dirt
and from deformation. Be sure to clean it before use.
Take care that the Print Head is not soiled or scratched.
Perform the PG adjustment with the Valve Assy installed on
the carriage in the same condition as during printing.
C H E C K
Make this adjustment after installing the mechanism unit in
P O I N T
the Lower Housing. (Install the Linear Scale after
adjustment.) Refer to "4.4.4 Printer Mechanism (p.107)"
With Stylus Photo RX700, four stages of PG setting are
available by means of the APG Mechanism. However, make
this adjustment with the mechanism in the minimum PG
position (PG-: 1.2 mm).
Adjustment
Carriage moves up and down
because of an eccentricity (CR
Guide Shaft) (for APG)
APG Assy
Figure 5-3. Relationship between Adjustment Bush and Carriage (at left side)
Front
Figure 5-4. Relationship between Adjustment Bush and Carriage (at right side)
Mechanical Adjustment
Carriage moves up and down because of
an eccentricity (bush) (for adjustment)
Figure 5-2. APG Mechanism
A
D
B
C
A
C
B D
C A
D B
D
A
C
Revision B
Revision B
Carriage Assy
Front
B
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