Service manual

Unit 5: Adjustment Procedures
Page 5-8 SATO D508/D512 Service Manual
EYE MARK / PAPER END SENSOR SENSITIVITY
1 Open the Top Cover and remove the front cover.
2 Turn the VR2 potentiometer fully counter-clockwise.
3 Connect the Test Module to the test connector on the printer’s test panel.
4 Connect the multimeter ground probe to the pin identified as GND on the test module.
5 Connect the multimeter positive probe to the pin identified as SIG on the test module.
6 Set the multimeter to DC Voltage mode and turn the test module dial to position 4.
7 Physically place the media’s reference point into the sensor.
8 Adjust the VR2 potentiometer until the multimeter displays a value of +0.5 V ± 0.2 V.
9 Remove the label from the sensor and confirm that the voltage displayed is now 0.9 volts
above the previous reading.
10 Repeat steps 7 through 9 until a acceptable sensitivity level is established.
PAPER END SENSOR SENSITIVITY (ALTERNATE)
CAUTION: Care should be taken not to short the pins on the test connector. Damage to
the PCB board could occur if the pins are shorted.
1 Open the Top Cover and remove the front cover.
2 Turn the VR2 potentiometer fully counter-clockwise.
3 Connect an insulated multimeter ground probe to pin 3 (GND) on the test connector.
4 Connect an insulated multimeter positive probe to pin 2 on the test connector.
5 Set the multimeter to DC Voltage mode.
6 Physically place the media into the sensor.
7 Adjust the VR2 potentiometer until the multimeter displays a value of +0.5 V ± 0.2 V.
8 Remove the label from the sensor and confirm that the voltage displayed is now 0.9 volts
above the previous reading.
9 Repeat steps 7 through 9 until an acceptable sensitivity level is established.
NOTE: Refer to Figure 5-2 for visual assistance in performing this procedure.
NOTE: Use of the Test Module on this printer also requires the use of a
connector adapter cable that should also be purchased with the module.