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HP Designjet 300 Series Printers - Flashing Load Media and Error LEDs

	Parts required (part numbers are subject to change)
	Troubleshooting steps
	Sensors test
	Accuracy calibration

KRS document number: BPP90097

Last updated: 23-Aug-2001

Minimum skill level: 2

An improperly set sensor normally causes this system error. Common causes include misaligned paper, top cover or pincharm sensors. Use the steps listed in this document to accurately determine the cause of the failure and replace the appropriate parts.

Parts required (part numbers are subject to change)

Part Description	Model numbers - C4701A, C4699A	Model numbers - C4702A, C4700A
Electronics Module (Required)	C4699-69039	C4699-69039
Front Panel (Required)	C3190-60144	C3190-60144
Spittoon (Required)	C4699-60002	C4699-60002

NOTE: If Removal and Installation instructions are needed for reference during any repairs performed, refer to the 300 Series Service Manual available on the 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 by turning the printer on and printing internal test prints. If functionality is verified, no additional parts should be replaced.

1. Remove the paper from the printer.
2. Make sure the top cover is closed.
3. Verify the pincharm lever is in the up position.
4. Turn the printer on.
5. If no problems are detected, attempt to verify functionality.
6. If the Load Media and Error LEDs continue to flash during initialization, continue with the next section.

Sensors test

1. Turn the printer off.
2. Close the top cover.
3. Enter Service Mode 1:
1. Hold the FORM FEED key down and turn the printer on.
2. Continue to hold the FORM FEED key until the LEDs on front panel begin sequencing.
4. Press the PLOT QUALITY key to initiate the Sensors test.
5. If the Ready, Coated, and Roll LEDs are on, it indicates a sensor is tripped.
6. Lift the top cover; the Ready LED should go off. If not, replace the Front Panel Assembly (refer to pg. 6-12 of the 300 Series Service Manual). Following replacement, attempt to verify functionality. If problems persist, continue with Step 8.
7. Lift the top cover and lower the pincharm (media release) lever; the Roll LED should go off. If not, replace the Spittoon (refer to pg. 6-23 of the 300 Series Service Manual). Following replacement, attempt to verify functionality. If problems persist, continue with Step 8.
8. Replace the Electronics module (refer to pg. 6-12 of the 300 Series Service Manual). Following replacement, perform an Accuracy calibration (listed below) and verify printer functionality.

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 (24 x 36 inches / 61 x 91 cm). 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. Turn the printer off.
3. Press and hold in the MEDIA SOURCE key and turn the printer on (entering Service Mode 2).
4. Set the Media Type on the front panel to Film.
5. Load the film with the matte (dull) side down, in portrait orientation.
6. When the Ready LED lights up, press the ACCURACY CALIBRATION key.

NOTE: The Ready LED will begin to flash. Allow several minutes for the printer to complete the calibration print.

7. The printer will eject the sheet, and the Load Media LED will light up.
8. Unload the sheet from the printer.
9. Wait until the ink on the sheet is dry.
10. Reload the sheet face-down into the printer in the direction indicated by the arrows on the calibration plot.

NOTE: The Ready LED will begin to flash. The printer takes less than 1 minute to read the calibration sheet, calculate the calibration data, and save the data in the EEROM.

11. Unload the sheet from the printer.
12. The Accuracy calibration is now complete.
13. Verify printer 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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