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HP Designjet 400 Series Printers - Steady LOAD MEDIA + CARTRIDGE + DATA LEDs (Steady FKL)

	Parts required (part numbers are subject to change)
	Troubleshooting steps
	Entering Service mode 1 and 2
	Carriage Axis (Y-axis) test
	Carriage test
	Electronics test
	Accuracy calibration

KRS document number: BPP90076

Last updated: 01-May-2002

Minimum skill level: 2

This System Error indicates a problem initializing the Carriage. 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 - C4713A, C4715A, C6080A, C6082A	Model numbers - C4714A, C4716A, C6081A, C6083A
Cutter (required)	C4713-60040	C4713-60040
Carriage (required)	C4713-60039	C4713-60039
Trailing Cable (required)	C4713-60181	C4714-60181
Electronics Module (required)	C4713-69203	C4713-69203

NOTE: The HP Designjet 400 series printers have a very high rate of Cutter assembly failure. Due to this fact, the Cutter assembly must be replaced during any on-site repair (refer to page 8-21 of the HP Designjet 400 Series Service Manual for teardown procedures). If the Cutter appears OK, it still must be replaced at some point during the service call.

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 power off, wait 15 seconds, then turn power on.
2. If the Error light pattern continues, turn the printer off.
3. Enter Service mode 1 (instructions listed below).
4. Run the Carriage Axis test, Carriage test, and the Electrical test (instructions listed below).
5. If all three tests pass, turn the printer off, then on and attempt to verify functionality.
6. If any of the tests fail, replace the Carriage and Trailing Cable (refer to page 8-37, 8-34 of the HP Designjet 400 Series Service Manual).

NOTE: If Removal and Replacement instructions are needed for reference during any repairs performed, refer to the HP Designjet 400 Series Service Manual available on the Partner Care Web site for review or download.

7. Perform an Accuracy calibration and attempt to verify functionality. If problems persist, continue with replacing the Electronics module.
8. Replace the Electronics module (refer to page 8-13).
9. Following replacement, perform an Accuracy calibration as listed below and verify functionality.

Entering Service mode 1 and 2

The printer must be in Service mode to perform internal calibrations.

Service mode 1

1. Hold the REPRINT key down and turn the printer on.
2. Continue to hold the REPRINT key until LEDs on front panel begin sequencing.
3. Press the appropriate key(s) to perform the necessary test.

Service mode 2

1. Hold the MEDIA SOURCE key down and turn the printer on.
2. Continue to hold the MEDIA SOURCE key until LEDs on front panel begin sequencing.

NOTE: Service mode 2 contains tests that need a complete initialization or the printer (same as normal operation mode). If a system error occurs in while trying to access Service mode 2, turn the printer off and enter Service mode 1 to complete the necessary test(s).

3. Press the appropriate key(s) to perform the necessary test.

Carriage Axis (Y-axis) test

1. Enter Service Mode 1.
2. To start the Carriage Axis test, press the REPRINT key.
3. Carriage should move toward right hand side of printer.

NOTE: The Carriage will continue to move from side to side, over the drive roller.

4. A steady Fast LED indicates the test passed.
5. A flashing Sheet LED indicates test fail.

Carriage test

1. Enter Service mode 1.
2. Press the PRINT QUALITY key to start the Carriage test.
3. All of the front panel LEDs will turn off.
4. If the test passes, several LEDs on the front panel will be steady (on).
5. If the test fails, the LEDs will be flashing.

Electronics test

1. Enter Service Mode 1.
2. Press MEDIA SOURCE + REPRINT keys to start the test.
3. All LEDs will turn off, and there will be no movement from the printer.
4. Monitor Front Panel during the test.
5. A steady Sheet LED indicates test pass.
6. A flashing Sheet LED indicates the test failed.

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 approximately 24 x 36 inches, 61 x 91 cm (D-size). If sheet media is not available, roll media can be used if cut into a 24 X 36 inch sheet. 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 Coated Paper.
5. Load the film with the matte (dull) side down, in portrait orientation.
6. When the Ready LED lights up, press the REPRINT 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. Cut the sheet along the dotted line and reload facedown 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 10 minutes 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. Turn the printer off then on, and 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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