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HP Designjet 5000 and 5500 Series - TWI: No Power

KRS document number: BPP90157

Last Updated: 04-Dec-2002

Minimum skill level: 2

The printer does not respond when turned on. Common causes include problems with main power source, a defective Power Supply Unit or Main PCA. 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	5000 Series Models - C6090A/V, C6091A/V, C6095A/V, C6096A/V	5500 Series Models - Q1251A/V, Q1252A/V, Q1253A/V, Q1254A/V
Power Supply Unit (Required)	Q1251-60312	Q1251-60312
HDD Controller (Required)	C6090-60318	C6090-60318
Main PCA (Required)	C6090-60317	Q1251-60030

NOTE: If Removal and Installation instructions are needed for reference during any repairs performed, refer to the 5000 and 5500 Series Service Manual available on the Computer 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 by turning the printer on and printing internal test prints. If functionality is verified, no additional parts should be replaced.

1. Turn the printer off, using the main power switch located on the back of the printer.
2. Check the power cable for damage and replace if necessary.
3. Check the power cable connections.
4. Turn the main power switch on.
5. If no problem appears, attempt to verify printer functionality.
6. If no power is detected, turn the printer off and continue with the remaining steps.
7. After 10-15 seconds, turn the main power switch on.
8. Listen for internal printer operations (fans, vacuum, or movement).

NOTE: If internal printer movement or noise is detected when the printer is turned on, use the work instruction Front Panel Display is Blank, Weak or Fading (bpp90218) to resolve the issue.

9. If no internal movement or functionality is observed, replace the power supply unit (refer to pages 8-88 of the service manual).
10. Following replacement, attempt to verify printer functionality.
11. If the problem persists, replace the Main PCA and the HDD Controller (which connects to the new main PCA). Refer to pages 8-81, 8-85 of the service manual.
12. Following replacement, turn the printer on and perform the Backup EEROM Service Utility (instructions below).
13. Turn the printer off, then on, and verify functionality.

Backup EEROM service utility

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 the ENTER key.
3. Using the Arrow keys, scroll to Utilities and press ENTER.
4. Press the Up Arrow key and the ENTER key simultaneously.
5. Select Service Utilities and press ENTER.
6. Scroll to 1.6 Backup EEROM and press ENTER.
7. Select the part replaced (Main PCA) and press ENTER.
8. A message confirming the selection will appear, press ENTER to confirm (if the wrong part is selected, press BACK to cancel).
9. The printer will perform the backup and display the message, "Backup performed correctly."
10. Press the BACK key to return to the previous menu.
11. Press the BACK key again to return to the Service Utilities menu.
12. Turn the printer off then on and verify functionality.

Copyright 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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