Did this site save (or help earn) you money? Say thanks with a small donation.

The TWI Designjet Documents library presented here as a courtesy  of   ComputerCareOnline.com   The owners of this website have no affiliation to Hewlett Packard nor do we claim to represent HP in any way shape or form.    Return to TWI Documents Library Index Page

HP Designjet 400 Series Printers - Steady READY + MEDIA LEDs (Steady DM)

	Parts required (part numbers are subject to change)
	Troubleshooting steps
	Entering Service Modes 1 and 2
	Media Axis (X-Axis) test
	Electronics test

KRS document number: BPP90078

Last updated: 22-Aug-2001

Minimum skill level: 2

This system error indicates an X-axis shutdown. Some possible causes may be friction or obstruction in the X-axis, problem with X-axis encoder cable, X-axis motor, or electronics module. 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) See note below	C4713-60040	C4713-60040
Paper Drive motor/gear (Required)	C4713-60094	C4713-60094
Electronics Module (Required)	C4713-69203	C4713-69203

NOTE: HP Designjet 400 series printers have a very high rate of cutter assembly failure. Because of this, the cutter assembly must be replaced during any on-site repair (refer to pg. 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

NOTE: 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.
2. Lift top cover and lower the media lever (ensure the pinch arms release pressure on the paper).
3. Carefully move carriage and/or cutter assemblies to home positions.
4. Remove paper from printer.

CAUTION: Media sensor is easily damaged or broken. Slide folder in on right side to prevent damaging sensor.

5. Remove any small pieces of paper that may be stuck in paper path. A manila file folder may be inserted into the paper path to clear any obstructions that may be unseen.
6. If obstruction is removed, try loading both roll and sheet (preferably larger than 8.5 x 11) media twice, for each to prove functionality.
7. If loading media is unsuccessful, or no problem is found with the paper path, continue with performing a Media Axis Test (listed below).

Entering Service Modes 1 and 2

Service Mode 1

1. Hold down the REPRINT key 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.

Media Axis (X-Axis) test

1. Ensure top cover is closed and pinch arm lever is up.
2. Enter Service Mode 1.
3. Press the MEDIA LOAD key to start the test.
4. If the Glossy LED is steady (on) the test has passed. Attempt to verify functionality, if problem persists continue with performing the electronics test (listed below).
5. If the Glossy LED is flashing the test has failed. Replace paper drive motor (refer to pg. 8-23 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.

6. Following replacement, attempt to verify functionality.

Electronics test

1. Turn the printer off.
2. Ensure top cover is closed and the pinch arm lever is up.
3. Enter Service Mode 1.
4. Press the MEDIA SOURCE + REPRINT keys to start the test.
5. All LEDs will turn off, and there will be no movement from printer.
6. Monitor the front panel LEDs.
7. A steady Sheet LED indicates the test passed. Verify printer functionality if the electronics test passes.
8. A flashing Sheet LED indicates the test has failed. Replace the electronics module (refer to pg. 8-13).
9. Following replacement, perform an Accuracy calibration, 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.

	Web computercareonline.com