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hp designjet 4000 series printers
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» Introduction
» Entering the Menu
» Scan Axis
» Media Drive
» Electronics Module
» Carriage Assembly
» Sensors
» Ink Delivery System
» SVS/Aerosol Fan
» Air Pump System
» Vacuum Fans
» Others
» Bag Broken Recovery
» IO Information
» Unit Information
» Check Ink Supplies
» EEROM
» Set Unit Configuration
» Error 71:19 Recovery
» I/O Tests
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2. Media Drive Test

The purpose of this test is to diagnose a failure in the operation of components related to the Media Axis.
You must perform the Media Drive Test after:
  • System Error Code 81:XX.
  • System Error Code 41:XX.
  • System Error Code 73:XX.
IF POSSIBLE ALWAYS PERFORM THIS TEST BEFORE REPLACING ANY COMPONENT OF THE MEDIA-AXIS.
Perform the Paper Axis test as follows:
1. In the Service Tests submenu, scroll to "2. Media Drive test" and press Enter.
2. The Printer will start to initialize the Scan-Axis system and the Front Panel will display the following information:
  • Starting Gamut.
  • Starting Tests PWM.
  • Starting Tests GPIO.
  • Set GPIO psu_lpm.
If there is a failure at this point, the Front Panel will display System Error Code 01.0:10.
  • Checking voltage.
If there is a failure at this point, the Front Panel will display System Error Code 03:10. Check also System Error Code 01.0:10.
  • Clear GPIO psu_lpm.
If there is a failure at this point, the Front Panel will display System Error Code 01.0:10.
  • Checking voltage.
If there is a failure at this point, the Front Panel will display System Error Code 03:10. Check also System Error Code 01.0:10.
  • Config GPIO drv_enable.
If there is a failure at this point, the Front Panel will display System Error Code 01.0:10.
  • Booting up the Carriage.
If there is a failure at this point, the Front Panel will display System Error Code 02.1:10. Check also System Error Code 11:10 or System Error Code 01.1:10.
Unit Hangs Up - If no System error code is displayed on the Front Panel but the Printer hangs up and the last message on the Front Panel is "Booting up the Carriage" it means that the Carriage ASIC could not be detected. Troubleshoot this problem in the same way as if System Error Code 02.1:10 had appeared.
3. The Printer will now check the revision of the PCA and the following message will be displayed on the Front Panel:
  • Checking PCA rev.
The value for the PCA revision must be more than 0.625V, if not the Front Panel will display System Error Code 01.1:10.
4. The Printer will program the duty cycle for the PWM test for the Media Drive Movement and leave it disabled and the following message will be displayed on the Front Panel:
  • Prog slow PWM paper.
If there is a failure at this point, the Front Panel will display System Error Code 01.0:10.
5. Before continuing, the following message will appear on the Front Panel. Remove the media if it is still loaded and make sure you stay out of the Print Platen area if the Window is open.
6. The Printer will now test the Media Drive moving in an open loop in one direction and the following message will be displayed on the Front Panel. Press any key to continue the test:
Check that the movement done is more than 100 encoder units (in absolute value). If the movement done is less than 100 encoder units then open the Window and check for any visible obstacles restricting the movement of the Drive Roller or the Overdrive Assembly. In this case, press any key to finish the test.
7. The Printer will now test the Media Drive moving in an open loop in the opposite direction and the following message will be displayed on the Front Panel. Press any key to continue the test:
Check that the movement done is more than 100 encoder units (in absolute value). If the movement done is less than 100 encoder units then open the Window and check for any visible obstacles restricting the movement of the Drive Roller or the Overdrive Assembly.
If the Encoder Units is less than 100, the Printer will request you to follow these instructions:
  1. Manually load a sheet of paper in to the Printer (an A4 sheet).
  2. The Printer will test the Media Drive moving in an open loop.
  3. Perform a visual check during the test. The Front Panel will ask you if the paper moved or not:
    • If the paper moved, the Front Panel will display System Error Code 56:10.
    • If the paper did not move, the Front Panel will display System Error Code 41:10.
  4. A "FAIL" message will be displayed on the Front Panel and the test will be terminated at this point.
8. The Printer will now check the Media Drive servo system and the following messages will be displayed on the Front Panel:
  • Starting Paper Motor.
  • Off/On Paper Motor.
  • Starting Paper Axis.
If there is a failure at this point, the Front Panel will display System Error Code 81:10.
  • Calib. Analog Encoder.
If there is a failure at this point, the Front Panel will display System Error Code 56:03.
Once the Analog Encoder calibration is completed, the Front Panel will display the results:
Acceptable values are:
  • Gain: between 3 and 31.
  • Offset: between 12 and 25.
If the results are acceptable, press Enter. If the results are unacceptable, then press the Back/Cancel key and the Front Panel will display System Error Code 56:10.
  • Starting Media Path.
If there is a failure at this point, the Front Panel will display System Error Code 81:10.
  • Homing and repeat. test.
If there is a failure at this point, the Front Panel will display System Error Code 56:10.
9. The Printer will now check the Media Drive PWM. You must load media in to the Printer and press any key to continue the test.
10. When the PWM check is being performed, the following message will be displayed on the Front Panel:
  • PWM test with paper.
11. Once the PWM check is done, the results will be displayed on the Front Panel. Press any key to finish the test:
If there is a failure at this point, the Front Panel will display:
12. Once the test is completed, OK will be displayed on the Front Panel.
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