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User's Guide
6-26 Solving Problems
Re-Calibrating the Paper Sensor
The paper sensor test adjusts the sensitivity of the paper sensor so that it
can accurately sense paper in the printer. It is only necessary to run this
test if the RUN PCALIB TEST error message appears, or if erroneous
LOAD PAPER or CLEAR PAPER JAM errors occur.
Before you run the test, make sure that paper is not loaded in the printer.
Then, display the TEST parameter on the
Setup menu and select Pcalib.
When you release the Alt button, the printer will begin moving the
carriage and rotating the platen. During the test, printer logic will analyze
data supplied by the paper sensor from various locations around the platen.
From this data, printer logic can determine the amount of reflectivity that
the paper sensor must sense to properly detect paper in the printer. This
amount of reflectivity is called the paper threshold and the printer will
reset the normally-hidden PTHRESH parameter to this value. Refer to
Fine-Adjusting the Paper Sensor later in this section for more informa-
tion on the PTHRESH parameter.
When the test concludes, the Setup menu reappears.
)Note: If you attempt to run this test with paper loaded in the printer,
the UNLOAD PAPER error message will appear to warn you. If this
message appears when paper is not loaded, you must set the normally-
hidden PTHRESH parameter to a higher value before you can run the
test. Refer to Fine-Adjusting the Paper Sensor later in this section for
information on setting the PTHRESH parameter.
)Note: If the paper sensor test sets the PTHRESH parameter to a
value or 150 or lower, the platen surface is too dirty (reflective) for
reliable paper sensing to occur. To correct this problem, perform the
Cleaning the Platen and Bail Rollers procedure in the Cleaning and
Maintenance section of this guide. Then, rerun the paper sensor test.
4) TEST: Pcalib
User's Guide
6-26 Solving Problems
Re-Calibrating the Paper Sensor
The paper sensor test adjusts the sensitivity of the paper sensor so that it
can accurately sense paper in the printer. It is only necessary to run this
test if the RUN PCALIB TEST error message appears, or if erroneous
LOAD PAPER or CLEAR PAPER JAM errors occur.
Before you run the test, make sure that paper is not loaded in the printer.
Then, display the TEST parameter on the
Setup menu and select Pcalib.
When you release the Alt button, the printer will begin moving the
carriage and rotating the platen. During the test, printer logic will analyze
data supplied by the paper sensor from various locations around the platen.
From this data, printer logic can determine the amount of reflectivity that
the paper sensor must sense to properly detect paper in the printer. This
amount of reflectivity is called the paper threshold and the printer will
reset the normally-hidden PTHRESH parameter to this value. Refer to
Fine-Adjusting the Paper Sensor later in this section for more informa-
tion on the PTHRESH parameter.
When the test concludes, the Setup menu reappears.
)Note: If you attempt to run this test with paper loaded in the printer,
the UNLOAD PAPER error message will appear to warn you. If this
message appears when paper is not loaded, you must set the normally-
hidden PTHRESH parameter to a higher value before you can run the
test. Refer to Fine-Adjusting the Paper Sensor later in this section for
information on setting the PTHRESH parameter.
)Note: If the paper sensor test sets the PTHRESH parameter to a
value or 150 or lower, the platen surface is too dirty (reflective) for
reliable paper sensing to occur. To correct this problem, perform the
Cleaning the Platen and Bail Rollers procedure in the Cleaning and
Maintenance section of this guide. Then, rerun the paper sensor test.
4) TEST: Pcalib