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HP Designjet 5500 Series Printers - Eaglejet TWI: Noise During Media Advance

	Parts required (part numbers are subject to change)
	Troubleshooting steps
	Performing service tests, service utilities and service calibrations

KRS document number: BPP90210

Last Updated: 05-Dec-2002

Minimum skill level: 2

Introduction

Noise may occur for a variety of reasons, not all of which indicate a hardware problem. Some possible causes are unsupported media, media of an unusual width, overdrive assembly bushings, damaged spindle, or damaged entry roller. Follow the steps listed below to determine the actual cause of the error and to replace the necessary parts.

Parts required (part numbers are subject to change)

Part description	HP Designjet 5500 series Eaglejet
Synthetic oil (Required)	C6072-60047
Center platen assembly (Required)	C6090-60080 (42-inch)
Entry roller (Required)	C6090-60077
Spindle (Required)	C6090-60074 (42-inch)

NOTE: If removal and installation instructions are needed for reference during any repairs performed, refer to the HP Designjet 5000 and 5500 Series Service Manual available on the HP Partner Care Web site for review or download.

Troubleshooting steps

If parts are replaced or fixed in any of the steps listed below, attempt to verify printer functionality before continuing with the remaining steps. Verify functionality by turning the printer on and successfully printing internal test prints. If functionality is verified, no additional parts should be replaced.

1. Verify that the noise is occurring during media advancement and not being confused with a different noise exhibited by the printer.
2. Verify media being used is a standard supported width (24-inch to 60-inch).

NOTE: If the left edge of the media is partially covering a vacuum hole, the vacuum may cause a "whistling" noise, or may cause the media to "chatter." The noises are due to irregular width media being used. To solve the noise, HP recommends using supported HP media.

3. Verify media is correctly loaded onto the spindle and that the spindle is not damaged, replace the spindle if necessary.
4. Load a sheet of media (minimum 8.5-inches wide x 22-inches long). The printer does not recognize sheet media smaller than 22 inches long.

NOTE: The next step requires synthetic oil to lubricate the center platen. The printer is shipped with a User Maintenance kit that contains the oil necessary to complete the lubrication.

5. If the noise continues, remove the sheet of media and apply 3 to 5 drops of synthetic oil down the center 14 holes (42-inch) or 20 holes (60-inch) of Center Platen (as described in Figure 1 below).

NOTE: The printer is shipped with a User Maintenance kit that contains the synthetic oil necessary to complete the lubrication. Lubricate the center platen with customer prior sending onsite service.

CAUTION: Do not exceed 10 drops per hole or put the oil into any or other holes. Excessive oil can potentially damage the overdrive or cause damage to other components.

Figure 1: Location of holes on the center platen that require lubrication (HP Designjet 1000 series printer pictured)

6. Following lubrication of the center platen, try loading sheet media again.
7. If noise has disappeared, load roll media and attempt to verify functionality.
8. If the noise re-occurs, repeat Steps 5 and 6 (not exceeding 10 drops in any of the holes).
9. Attempt to load both sheet and roll media to verify functionality.
10. If the noise persists, continue with the remaining steps.
11. Check the entry roller for damage or problems and replace it if necessary (refer to pages 8-111 of the service manual).
12. Replace the Center platen (refer to pages 8-117 of the service manual).
13. Following replacement, turn the printer on and perform the Carriage Height and Scan-Axis calibrations as described below.

Performing service tests, service utilities and service calibrations

1. Turn the printer on.
2. When the "READY" message is displayed on the front-panel, scroll to the Printer Setup Options icon and press ENTER.
3. Using the Arrow keys, scroll to Utilities and press ENTER.
4. Once inside the Utilities menu, press the Up Arrow key and the ENTER key simultaneously.
5. Scroll to the necessary menu (Service Tests, Service Utilities, or Service Calibrations) and press ENTER.
6. Once inside the appropriate menu, scroll to the needed test and press ENTER to start the test.

NOTE: Full width media must be used to perform the Scan-Axis test. If the printer is 60-inch model and no full-width media is available, cut 36-inch media at a length of 60 inches to create a 60 x 36-inch sheet of media.

7. Following successful calibrations, verify printer functionality.

Copyright Hewlett-Packard Co. 2002
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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