HP DesignJet 2500CP Service Manual page 94

8 If the test fails, a message similar to the following is displayed on the
front panel.
Green Fail V: 8.0
Blue Fail V: 11.0 T: 0
Refer to the following table in order to know the limits for value V (Saturated
Input Voltage) for the Green and Blue LEDs:
LED LED
Green
Blue
If the test fails to resolve the problem, try one of the following:
1 The lens cover, which is installed on the line sensor, is dirty. Replace the
lens cover ' Users Guide, Chapter 10 (Lens Maintenance).
2 Make sure that the Mark Encoder on the Drive Roller is clean.
3 Perform the Electronics test ' page 4 6.
4 Check if the Media used is suitable for the printer.
5 Check if the Line Sensor is installed and connected correctly.
6 If the problem continues, replace the Carriage Assembly ' page 8 42.
4-10
V
Minimum Maximum
7
7
HP DesignJet CP Series Printers
10
12
Service Tests