Platen Gap Adjustment - Epson LQ-570e Service Manual

EPSON LQ-570e/LQ-580

5.2.2 Platen Gap Adjustment

The tools requred in the platen gap adjustment are;
o Motor Driver
o
Motor Driver Bit (Hezagon)
o Thickness gauge (0.33 : 0.36)
If the guide CR shaft or adjust parallel bushing is rotated or reassembled, or printing is too
faint or stained, the Plate Gap adjustment must be performed in the following order:
1. Set the adjust lever gap on 2nd position where is 2nd square hole from bottom on the
left frame assembly.
FRAME ASSY.,LEFT
2
Figure 5-2. Position"0" (2nd Position)
2. Set Adjust Lever Holding Fixture on the left frame assembly.
3. Insert the Thickness Gauge stick into the hole of the guide CR shaft.
4. Turn the guide CR shaft using Platen Gap Adjustment stick to adjust platen gap (PG).
→
NOTE: Platen Gap: 0.33 OK, 0.36
NOTE: Judge whether Thickness Gauge drops or not. If the Thickness Gauge
does not drop, ajust the platen gap again.
NOTE: The adjust gap lever must be fixed to the stopper of Adjust Lever Holding
Fixture.
5. Permanently secure the hexagon nut (normal, M4) to fix the adjust gap lever.
Adjustment
LEVER,GAP,ADJUST
HEXAGON NUT,NORMAL,M4
nd
Groove
→
NG
Adjustment and Resetting the Printer
NOTE: Tightening Torque is 14 to 16 kg/cm.
The adjust gap lever and the guide CR shaft must be firmly held by fixture.
6. Recheck Platen Gap has been adjusted within specification, after securing the hexagon
nut (normal, M4).
NOTE: Adjust Gap Lever must be set on 2nd position.
NOTE: If Platen Gap is out of specification, repeat process 4 to 6 until Platen
Gap becomes within specification.
→
NOTE: Platen Gap: 0.33 OK, 0.36
7. Remove Platen Gap Adjustment stick and Adjust Lever Holding Fixture.
n The Adjust Parallel Bushing should not move when turning the
C H E C K
Adjust Gap Lever from 1st step to 8th step.
P O I N T
n The Adjust Gap Lever should not bent.
n The Adjust Gap Lever should be able to stay in each steps. If no
click feeling occurs, remove the hexagon nut and change
direction of the Toothed Lock Washer.
PLATEN
Figure 5-3. Platen Gap Adjustment
Revision C
→
NG
THICKNESS GAUGE
PRINT HEAD
PLATEN GAP
96