Epson Stylus Pro 4900/Epson Stylus Pro 4910 Revision A
ADJUSTMENT CR Related Check & Adjustments 319
Confidential
4.10.2 CR Belt Adjustment
REQUIRED TOOLS
Sonic Tension Meter U-507
Any tools to flip the belt
STANDARD VALUE
14.5 ± 1 N
EXECUTION MODE
Normal Mode
PROCEDURE
1. Remove the following parts in advance.
Front Cover (P. 142)
Left Cover (P. 137)
2. Install the following part after removing the Left Cover.
Front Cover
3. When any paper is loaded, remove it.
4. Turn the printer ON.
5. Start the Service Program and select CR Belt Adjustment.
6. Click [Run].
CR Unit goes and returns three times.
7. Input the following values to the tension meter.
MASS: 000.9 g/m
WIDTH: 005.5 mm/R
SPAN: 0710 mm
8. Bring the microphone of the Sonic Tension Meter U-507 closer to the center of the
belt on the upper side.
9. Press [MEASURE] on the Sonic Tension Meter U-507 and flip the belt with
tweezers or a similar tool.
10. Measure the belt tension for three times, and check if the average is within the
standard value.
Within the standard value: Go to Step 11
Out of the range: Go to Step 13
11. Click [Finish].
12. Turn the printer OFF to complete the adjustment.
C A U T I O N
Be sure to measure the tension of the belt on the upper side. If
you measure the tension of the belt on the lower side, the
measuring value may be inaccurate.
Flip the belt as weak as the Sonic Tension Meter U-507 can
measure it.
Be careful not to let the microphone touch the belt when
flipping the belt.
C H E C K
P O I N T
Bring the microphone within 5 mm from the belt but do not let it
touch the belt.
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