5.2 ADJUSTMENT AND RESETTING
5.2.1 Platen Gap Adjustment
If you have rotated or reassembled the rear CR guide shaft or parallelism
adjustment bushing, or if printing is too light or too dark, even at the proper
PG lever position, perform this adjustment at 3 positions : left end column,
center column and right end column.
1. Remove the printhead from the CR assembly once. (Refer to Chapter
4.)
2. Remove the ribbon mask from the ribbon mask holder using tweezers,
as shown in the following figure.
Ribbon Mask
Ribbon Mask Holder
Figure 5-1. Removing the Ribbon Mask
3. Attach the printhead to the CR assembly again, tightening the 2 CBS
screws (3 × 10).
4. Move the printhead to left end column position.
5. Set the release lever to the FRICTION position.
6. Set the PG adjust lever to the second slot from rear of the printer
mechanism as shown in the following figure.
7. Loosen the hexagon nut (M4) securing the PG adjust lever while setting
the PG adjust lever to the second slot position from the rear of the
printer mechanism.
PG SW2
PG Adjust Slot
PG Adjust Lever
PG SW1
Figure 5-2. Settings the PG Adjustment Lever
8. Insert the thickness gauge vertically between the printhead and platen.
9. Insert a thin screwdriver into the drilled hole, located at the right edge of
the rear CR guide shaft and adjust the platen gap by moving the
screwdriver to forward or backward until the gap is large enough for a
0.42 mm thickness gauge but too narrow for a 0.45 mm thickness
gauge.
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