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HP Designjet 500 and 800 Series Printers - TWI: System Error 03:10

	Parts required (part numbers are subject to change)
	Troubleshooting steps
	Verifying printer functionality

KRS document number: BPP90136

Last Updated: 24-Aug-2001

Minimum skill level: 2

Error 03:10 indicates a Power supply failure in the printer. Causes of this error can vary from a poor main power source, to cable connections, a faulty power cable, or the printer's Power supply or Electronics module. 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	Designjet 500 Models - C7769B, C7770B, C7769C, C7770C	Designjet 800 Models - C7779B, C7780B, C7779C, C7780C
Power Supply (Required)	C7769-60145	C7769-60145
Electronics Module (Required)	C7779-69144	C7779-69144

NOTE: If Removal and Installation instructions are needed for reference during any repairs performed, refer to the HP Designjet 500/800 Series Service Manual download.

Troubleshooting steps

If any of the troubleshooting steps listed below solve the problem, attempt to verify printer functionality (as instructed below). If functionality is verified, no additional parts should be replaced.

NOTE: Always verify the printer's current Firmware release and upgrade as needed.

1. Turn the printer off, then on to verify error. If no errors, attempt to verify functionality.
2. If the error appears or problems persist, continue with the remaining steps.
3. Reseat the power cord on both ends.
4. Disconnect the printer from any devices such as a universal power supply or surge protector and connect it directly to the power outlet.
5. Turn the printer on, if the problem persists continue with the remaining steps.
6. Try a different power cord, and if unsuccessful a different wall outlet (if possible).

NOTE: Most monitor and computer power cords are of a standard design and can be used.

7. If the problem persists, remove the power cable from the printer.
8. Remove the left-end cover from the printer.
9. Check all the connections on the Electronics module and reseat as necessary.
10. Reconnect the power cable and turn the printer on.
11. If the error re-occurs, continue with the remaining steps.
12. Replace the Power supply (refer to pg. 8-52 of the 500/800 Series Service Manual).
13. Following replacement, turn the printer on and attempt to verify functionality.
14. If the problem persists replace the Electronics module (refer to pg. 8-24 of the 500/800 Series Service Manual).
15. Following replacement, turn the printer on and verify functionality.

Verifying printer functionality

1. Turn the printer on.
2. Allow initialization to complete.
3. Load media into the printer.
4. From the main front-panel menu, select the Ink menu and press ENTER.
5. Select Troubleshooting and press ENTER.
6. Follow the instructions on the Front panel.
7. Following a successful Troubleshooting print, printer functionality is verified.

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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