Epson LQ-2550 Technical Manual page 198

REV.-A
When the left frame is removed, perform the following adjustments:
Section 4.3.1 Timing Belt Tension Adjustment (Page 4-40)
Section 4.3.2 Paper Feed Motor Backlash Adjustment (Page 4-41)
Section 4.3.3 Parallelism Adjustment Between Carriage Guide Shaft B and Platen (Page 4-42)
Section 4.3.6 Bi-directional Printing Alignment (Page 4-47)
ASSEMBLY POINTS:
Prior to installing the platen gap gear assembly, verify that the leaf spring is mounted as shown below.
Assembly
When installing the platen gap gear assembly, shift one cog at the end of the gear so as to true up
the edge of the two gears at the other end. This ensures that the platen gap gear assembly will
rotate without backlash.
Platen Gap Gear Assembly
Install the ribbon drive wire as following procedures.
If the nut at the right frame securing the side frame support is loose, tighten it using a 7 mm wrench.
ADJUSTMENT REQUIRED
Leaf Spring
Gear
Figure 464. Leaf Spring Mounting Orientation
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Figure 4-65. Platen Gap Gear Assembly Installation
Left Frame
Carriage Guide
Shaft B
4-36