4-9
Diagnostic Tests and Utilities
HP Designjet 4000/4020 Printer Series Service Manual
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.
5 Once the Carriage is booted up, the Service Station will be prepared and
moved to a safe position so that the Carriage can be moved. During this
process, the following information will be displayed on the Front Panel:
îš„ Starting SVS Motor.
If there is a failure at this point, the Front Panel will display System Error
Code 21:12. For more information on troubleshooting this error code, refer
to Page 2-8. Also, try to perform the Service Station Test (refer to Page 4-33).
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 "Starting SVS
Motor" it means that the SVS Motor could not be initialized. Troubleshoot this
problem in the same way as if
System Error Code 21:12
had appeared
.
6 The Printer will program the duty cycle for the PWM test for the Scan-Axis
Movement and leave it disabled and the following information will be
displayed on the Front Panel:
îš„ Prog slow PWM scan.
îš„ Moving carriage middle.
îš„ Prog fast PWM scan.
If there is a failure at this point, the Front Panel will display System Error
Code 01.0:10. For more information on troubleshooting this error code,
refer to Page 2-3.
7 The Carriage will be moved to the middle of the Center Platen. If there is a
failure in moving the Carriage, the Front Panel will display System Error
Code 01.0:10. For more information on troubleshooting this error code,
refer to Page 2-3.
8
The printer will now check that it can read the Encoder Strip. When the
following message appears on the Front Panel, open the Window and press
the
Up
key to move the Carriage to the left and the
Down
key to move the
Carriage to the right. Make sure that you move the Carriage in both directions
and check that the Carriage actually moves when a key is pressed.
If there is a failure at this point, the Front Panel will display System Error
Code 01.0:10. For more information on troubleshooting this error code,
refer to Page 2-3. If the Carriage only moves in one direction, troubleshoot
the problem as System Error Code 01.1:10 (refer to Page 2-3).
Use the Up key
to move the
Carriage to
the Left
Use the Down
key to move
the Carriage
to the Left
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