Details Of Adjustments; Pf Timing Belt Tension Check - Epson WF-7525 Service Manual

Epson WF-7520/7510/7010 series

5.2 Details of Adjustments

This section provides adjustment procedures for which explanation in details is necessary. See
Adjustments (p69)"

5.2.1 PF Timing Belt Tension Check

This section describes PF Timing Belt tension check.
This printer is designed so that each tension of the PF Timing Belt falls within the
expected range if you correctly reassemble the unit according to this manual. If the result
does not fall within the standard range when measuring the belt tension in this section,
adjust it according to the instructions in this section.
The standard tension range of the PF Timing Belt is as follows:
• Standard: 13.5 ± 1.5 N
Tools
Sonic tension gauge
Plastic tweezers
Adjustment procedure
When performing the PF Timing Belt tension measurement, make sure of the following.
Perform PF Timing Belt tension measurement before installing the Main Board.
Bring the microphone of the sonic tension gauge within 5 mm from the PF Timing Belt
but do not let it touch the belt.
Flip the PF Timing Belt as weak as the sonic tension gauge can measure it.
Be careful not to damage the PF Timing belt when flipping it with the plastic tweezers.
1. After installing the PF Timing Belt
2. Set the following parameters to the sonic tension gauge:
Weight: 1.1 g/m
Width: 3.0 mm
Span: 73 mm
3. Bring the microphone of the sonic tension gauge close to the upper center of the PF Timing Belt as shown in
Figure 5-1.
4. Press the "MEASURE" button of the sonic tension gauge and flip the PF Timing Belt with plastic tweezers
and measure the tension of the belt three times.
5. Check if all measured values fall within the standard range.
Within the standard range:
PF Timing Belt tension check is complete.
If any of the measured value is out of the standard range:
1. Loosen the screws (x2) of the PF Motor Plate, and adjust the position referring to
2. Tighten the screws of the PF Motor Plate, and measure the tension again.
Adjustment
for the adjustments not explained here.
(p 62), rotate the PF Roller one turn.
Left side
PF Timing Belt
Figure 5-1. PF Timing Belt Tension Check
Details of Adjustments
"5.1 Required
Figure 5-1.
Tension: lower
Tension: higher
PF Motor Plate
C.C SCREW 3x5 F/ZN-3C (6 ± 1kgf·cm)
Revision A
75