Service manual

2.1.3 Platen Gap Adjustment

You can adjust the platen gap (the gap between the platen and printhead) to allow the printer to use paper of

different weights or thicknesses. When you move the platen gap adjust lever forward or backward, the

carriage guide shaft rotates. This rotation moves the carriage either toward or away from the platen and

changes the platen gap. This adjustment function has nine ranges for the adjustment, and the adjustment

position is detected by platen gap (PG) switches.

Moving the platen gap adjust lever beyond position 2 changes the print speed mode to Copy mode, and the

speed slows down to about

⁄

normal to protect the printhead. The following table show you the relationship

between the platen gap and the print speed.

Table 2-2. Platen Gap and Print Speed

Paper Type

Paper

Thickness (mm)

Adjust Lever

Position

PG SW Print Speed

Single Sheet 0.065 (14 lb) 0 Closed Normal

0.1 (22 lb) 0 Closed Normal

0.14 (24 lb) 1 Closed Normal

Continuous

Paper (Single

Sheet)

0.065 (14 lb) 0 Closed Normal

0.09 (20 lb)

0 Closed Normal

Continuous

Paper (Multipart)

~0.18 (1+1 P) 1 Closed Normal

~0.25 (1+2 P) 2 Open Copy

~0.32 (1+3 P) 3 Open Copy

Labels 0.07 — 0.19 2 Open Copy

Envelopes 0.16 — 0.32 2 Open Copy

0.16 — 0.40 3 Open Copy

0.22 — 0.44 4 Open Copy

0.23 — 0.46 4 Open Copy

0.26 — 0.52 6 Open Copy

Card Stock 0.22 2 Open Copy

Platen Gap Adjustment Slot

Lever, PG, Adjust

PG SW

Open

Figure 2-3 Platen Gap Adjustment Lever

LQ-2070 Service Manual Operating Principles

Rev.A 2-3