Epson 2070 Service Manual - Page 115

ADJUSTING AND RESETTING THE PRINTER, 2.1 Platen Gap Adjustment, Removing the Ribbon Mask

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Adjustment LQ-2070 Service Manual 4.2 ADJUSTING AND RESETTING THE PRINTER 4.2.1 Platen Gap Adjustment If you have rotated or reassembled the rear CR guide shaft or parallelism adjustment bushing, or if printing is light or dark, even at the proper PG lever position, perform this adjustment with the printer in 3 positions: the 5th, 80th, and 130th columns. 1. Remove the printhead from the CR assembly (see Section 3.2.3). 2. Remove the ribbon mask from the ribbon mask holder using tweezers, as shown in the figure. Ribbon Mask Ribbon Mask Holder Figure 4-1 Removing the Ribbon Mask 3. Attach the printhead to the CR assembly again, tightening the 2 CBS screws (3 × 10, F/Zn). 4. Move the printhead to 5th 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 illustration. 7. Loosen the hexagon nut (standard, 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 Adjust Lever PG SW PG Adjust Slot Figure 4-2 Setting the PG Adjust Lever 8. Insert the thickness gauge vertically between the printhead and platen. 4-2 Rev.A

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4.2
ADJUSTING AND RESETTING THE PRINTER
4.2.1 Platen Gap Adjustment
If you have rotated or reassembled the rear CR guide shaft or parallelism adjustment bushing, or if printing is
light or dark, even at the proper PG lever position, perform this adjustment with the printer in 3 positions: the
5th, 80th, and 130th columns.
1.
Remove the printhead from the CR assembly (see Section 3.2.3).
2.
Remove the ribbon mask from the ribbon mask holder using tweezers, as shown in the figure.
3.
Attach the printhead to the CR assembly again, tightening the 2 CBS screws (3
×
10, F/Zn).
4.
Move the printhead to 5th 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 illustration.
7.
Loosen the hexagon nut (standard, M4) securing the PG adjust lever while setting the PG adjust
lever to the second slot position from the rear of the printer mechanism.
8.
Insert the thickness gauge vertically between the printhead and platen.
Ribbon Mask
Ribbon Mask Holder
Figure 4-1 Removing the Ribbon Mask
PG Adjust Slot
PG Adjust Lever
PG SW
Figure 4-2 Setting the PG Adjust Lever
Adjustment
LQ-2070 Service Manual
4-2
Rev.A