Ribbon Sensor Adjustment (Near End) - SATO CL612e Service Manual

Section 4. Electric Checks and Adjustments
4.10 Ribbon Sensor Adjustment
Additional equipment required:
STEP PROCEDURE
Refer to Section 4.2 for access to main PCB
1. Turn VR4 potentiometer on the main PCB all the way to the right.
2. Refer to Section 4.3.
Set the digital multimeter to DC voltage measurement mode.
Attach the connector from the TP Test Module to the test port on the main
PCB. Note correct positioning of connector. Set the dial to 7.
3. Connect (+) probe of the multimeter to Sig+ and (-) probe to pin GND.
4. Refer to Section 1-6 to locate the ribbon sensor. .or Low level adjustment,
rotate the ribbon unwind shaft to align one of the "slots" with the sensor.
Then adjust the electrical level with VR4 on the main PCB so that it will
measure less than +1.0.
5. .or High level adjustment, rotate the ribbon unwind shaft to align one of the
"tabs" with the sensor. Check the electrical level. If the level difference is +
2.3 V more than the Low level, it is acceptable. If not, return to STEP 4 and
readjust.
6. Standard values:
NOTE: Adjust low level to achieve the biggest difference between each level
by repeating the process If these values do not result, try the following:
Page 4-14
TP Test Module
Digital Multimeter
Low level (slot): +1.0 V or less.
High level (tab): Low level +2.3 V or higher
a) Repeat the process
b) Clean the sensor
c) Replace the sensor
SATO CL608e/CL612e Service Manual
PN 9001079
Rev. B