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HP Designjet 700 Printers - Vertical Line Straightness

	Parts required (part numbers are subject to change)
	Troubleshoot the ink cartridges
	Clean/replace the encoder strip and lubricate carriage rails
	Replace the carriage and trailing cable
	Drop Detect calibration
	Line Sensor calibration
	Accuracy calibration
	Verify functionality

KRS document number: BPP90034

Last updated: 28-Feb-2002

Minimum skill level: 3

Vertical Line Straightness (VLS) issues can be caused by several factors. The most common causes of VLS are dirty or defective cartridges, dirty or damaged encoder strips, and faulty carriage or trailing cable. The contents of this document provide instructions to quickly ascertain the cause, and the parts necessary to solve the issue.

Parts required (part numbers are subject to change)

Part description	Models C4705A, C4705B	Models C4706A, C4706B
Carriage Assembly (Required)	C4705-60113	C4705-60113
Trailing Cable (Required)	C3195-80009	C3195-80009
Lubricant (Required)	6040-0854	6040-0854
Encoder Strip (Required)	C4713-60098	C4714-60098
Ink Cartridge (Optional)	(1) 51645A	(1) 51645A

NOTE: The Mono PQ plot should be used to verify whether a problem has been resolved. The Mono PQ plot is listed in the Service Tests submenu, and can be performed in Unidirectional mode, and Bidirectional mode.

Troubleshoot the ink cartridges

1. Remove the ink cartridges, and clean the electrical contacts on the carriage and cartridges. Use a lint-free cloth dampened with water.
2. If cleaning the contacts fails to resolve the issue, replace the ink cartridges.
3. If replacing cartridges is no help, continue with the remaining steps.

Clean/replace the encoder strip and lubricate carriage rails

1. Slide the carriage all the way to the left or right side of the printer.
2. Using a lint-free cloth dampened with water, clean the encoder strip. If encoder strip is damaged, replace as needed.
3. Lubricate the carriage rails.
4. If problems persist, continue with replacing the carriage and trailing cable.

Replace the carriage and trailing cable

1. Replace the carriage and trailing cable.
2. Perform the calibrations in the order listed below.

Drop Detect calibration

1. Switch the printer on.
2. Press the ENTER button.
3. Use the ARROW key to scroll to the Utilities menu display.
4. Press the ENTER button.
5. Simultaneously press the ENTER and the UP Arrow buttons to access the Service Tests submenu.
6. Use the ARROW key to scroll to 1C Drop Detect Cal and press ENTER.
7. The display shows the message, Calibrating indicating that the calibration is in progress. Press ENTER when the calibration is complete.
8. Stay in Service mode to perform the next calibration.

Line Sensor calibration

1. In the Service Test submenu, scroll to 2C Line sensor cal, and press ENTER.
2. The display will show Calibrating Green LED Light, indicating that the calibration is in progress.
3. When the calibration is complete, the display will show Green LED Light # _ _ / press Enter. The number shown corresponds to the intensity of the LED light, which will vary for different types of media. The normal range of the number should be between 0 and 56.
4. Press ENTER when the calibration is complete.
5. Stay in Service mode to perform the next calibration.

Accuracy calibration

1. Place a sheet of polyester film over the top of the printer for approximately 10 minutes to let it stabilize to the environmental conditions. Use a sheet of approximately D-size (61 x 91 cm, 24 x 36 in). Roll media may also be used. When using polyester film, load it with the matte (dull) side down.

NOTE: If a polyester or matte film is not available, use HP Coated media when performing an Accuracy calibration.

2. Remove all media already loaded in the printer before performing the calibration.
3. In the Service Tests submenu, scroll to 3C Accuracy Cal, and press ENTER.
4. The message, Create pattern/measure pattern appears.
5. Press the UP arrow key to select Create pattern.
6. The message, Status/Calibrating appears while the printer is calibrating.
7. When the printer has finished calibrating, the message, Load media for calibration appears.
8. Load the media. If using D-size media (HP part 51642A), load the short edge as the leading edge in D-size printers and the long edge as the leading edge in E-size printers (E-size media, HP part 51642B).
9. When the media is loaded, the printer will automatically begin to plot the pattern.
10. A message, Status/Printing appears while printing.
11. Remove the media when the printer is finished printing.
12. The message Create pattern/Measure pattern appears.
13. Press the DOWN arrow key to select Measure Pattern.
14. Rotate the plot so the edge with the arrows point toward the printer, and reload the plot with the arrow edge print-side down.
15. The printer will load the plot and measure the alignment marks using the line sensor on the carriage.
16. If the calibration passes, the message, Success Calibration/Press Enter appears.
17. Press the PREVIOUS key until Ready is displayed on the printer's front panel.
18. Turn off and turn on the printer to verify functionality.

Verify functionality

Print several internal plots E or D-size.

Copyright (C) Hewlett-Packard Co. 2001
This information is subject to change without notice and
is provided "as is" with no warranty.
Hewlett-Packard shall not be liable for any direct,
indirect, special, incidental or consequential damages
in connection with the use of this material.

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