Service manual

Page 4-5
Section 4. Electric Checks and Adjustments
PN 9001080
Rev. A
SATO M-8485Se Standard Print Engine
Service Manual
4.4 Reflective Label Pitch Sensor Adjustment
STEP PROCEDURE
1. Loosen (2) screws holding the service board access cover to the rear of the
cabinet. Slide off the cover for access to the service board. Fig. 4-1
2. Load a roll of label stock with "Eye-Marks" into the printer. Leave the head lock
lever in the open position.
3. Connect the printer AC power cord to a grounded AC outlet. Place the power
switch in the OFF position.
4. Go to "Eye-Mark" input screen on display panel.
5. LOW LEVEL (NO "Eye-Mark") ADJUSTMENT
Position a label in the sensor's field of view (except for the black mark part).
Adjust VR1 on the Service PCB to 0.3 - 0.5V. . Fig. 4-5
NOTE: Sensor is fixed.
6. HIGH LEVEL ("Eye-Mark") ADJUSTMENT
Position the non-reflective "Eye-Mark" printed on the reverse side of the label
backing in the sensor's field of view. Check that the difference between the high
and low level is 1V or higher. If the voltage reading is less than 1V repeat step 5.
(Ref. HIGH LEVEL with "Eye-Mark" - LOW LEVEL (GAP)>-1V)
Level difference should be set as maximum.
7. After performing tests, replace the access cover.
Required Equipment:  DC Voltmeter
 Small Phillips screwdriver
(for potentiometer adjustments)
To adjust the Reflective Label Pitch Sensor voltage, perform the following steps:
ADJUST VR2 ON
SERVICE BOARD
ADJUST VR5
ON MAIN PCB
TO MIDPOINT
IF NECESSARY
4-5
Fig.