HP Designjet 700 Service Manual - Page 157

Edge Detect

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18. Edge Detect The purpose of this test is to verify the operation of the line sensor. Perform the edge detect test as follows: 1 In the Service Tests submenu, scroll to 18 Edge Detect" and press Enter. SERVICE TESTS 18 Edge detect 2 The Y Phys Pos = ##### / Sensor Reads = ###" message is displayed on the frontĆpanel. 3 Use the Up Arrow to move the carriage to the left and the Down Arrow to move the carriage to the right. If the value (###) of Sensor Reads is less than 100 when passing over the drive roller then the line sensor has passed the test. If the value (###) of Sensor Reads is more than 110 when passing over the media that is loaded then the line sensor has passed the test. If the values (###) of Sensor Reads is not within the above required ranges then the line sensor has failed the test. To resolve the problem, try one of the following: 1 Clean the drive roller surface. 2 Perform the line sensor calibration ' page 7Ć5. 3 Perform the mainĆcarriage com test ' page 8Ć26. 4 Replace the carriage ' page 6Ć34. 4 Press the Enter button when the test has been completed. C4705-90000 Troubleshooting 8-39

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Troubleshooting
C4705-90000
8-39
18. Edge Detect
The purpose of this test is to verify the operation of the line sensor.
Perform the edge detect test as follows:
1
In the Service Tests submenu, scroll to ±18 Edge Detect" and press
Enter
.
SERVICE TESTS
18 Edge detect
2
The ±Y Phys Pos = ##### / Sensor Reads = ###" message is displayed on the
frontĆpanel.
3
Use the
Up Arrow
to move the carriage to the left and the
Down Arrow
to move the
carriage to the right.
If the value (###) of
Sensor Reads
is
less
than
100
when passing over the
drive roller
then
the line sensor has passed the test.
If the value (###) of
Sensor Reads
is more than
110
when passing over the
media
that is
loaded then the line sensor has passed the test.
If the values (###) of
Sensor Reads
is not within the above required ranges then the line
sensor has failed the test. To resolve the problem, try one of the following:
1
Clean the drive roller surface.
2
Perform the line sensor calibration
'
page 7Ć5.
3
Perform the mainĆcarriage com test
'
page 8Ć26.
4
Replace the carriage
'
page 6Ć34.
4
Press the
Enter
button when the test has been completed.