3.Pressure of print roller
4.Pressure of reverse roller
a. Open the scan table.
b. Find the TPH adjust screw.
clock-wise: pressure increase
counter clock-wise: pressure reduce
a. Open the scan table.
b. Remove the cover of reverse roller.
c. Use a piece of master to test the pressure.
Make sure pressure of both side is same.
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b.Test the resistance (power off)
Red /black foot : as marked
Standard: 165 Ohm
Adjust the potentiometer to change.