SATO 9001226(A) Service Manual page 151

6.9 ADJUSTING AND CHECKING SENSORS (Cont'd)
Explanation on the details of the Sensor Level screen
• The number shown next to the sensor name indicates sensor level.
• ADJUST LEVEL indicates the number of taps for electric volume.
Increasing or decreasing the number of taps changes the resistance value of
electric volume.
Pressing the arrow buttons changes the sensor level.
/
arrow button increases the sensor level (and it decreases the resistance
value).
arrow button decreases the sensor level (and it increases the resistance
value).
The value changes within the range of 0 to 63 . The initial value is 31 .
6.9.1 I-Mark Sensor Sensitivity Adjustment
This sensor adjustment regulates reflecting ability for media referencing. Reflection modification is performed
via a potentiometer that is part of the potentiometer complex integrated to the main circuit board.
To establish reflection levels, upper and lower voltage levels must be set and the difference between the two
voltage levels should be maximized for optimum performance.
For proper performance, the sensor must have a voltage difference greater than 0.9V between high and low.
If performing the following procedure does not result in acceptable voltage levels, clean the window over the
sensor's eye. If this fails, the sensor or circuit board may require replacement.
These adjustment activities can be simply done in SERVICE MODE with the voltage measurement shown on
the LCD screen of the printer. The voltage measurement can also be taken from CHK connector with the use
of a multimeter.
To calibrate the I-Mark sensor level with the Operator Panel
Note: This calibration is only for fine tuning. The adjustment may not have any significant value changes,
depending on the media used. In this case, adjust the sensor level by the VR potentiometer on the Main PCB
(CONT) .
Enter to SENSOR LEVEL setting screen with I-MARK selected.
1.
Disengage the Head lock Lever and the Lid Latch to allow media loading.
2.
Physically position the media, with the blank media (label/tag) rests over the
I-Mark sensor.
Note:
To stabilize the sensor level, make sure the print head assembly is closed
and the media is threaded correctly after setting the media.
TG3 Series Service Manual
Section 6: Checks and Adjustment Procedures
sensor
name
I-Mark/ Edge sensor
sensor
level
Adjust
level
Slice
level
Page 6-13