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4-10

Diagnostic Tests and Utilities

HP Designjet 4000/4020 Printer Series Service Manual

At the end of 10 Carriage movements, the Front Panel will display the

maximum and minimum length (in encoder units) of the 10 movements and

the overall average.

If Carriage movement has not been detected or if Carriage movement was

very short, the Front Panel will ask you "Did the motor move?". If the answer

is Yes (the Carriage had moved) press Enter. If the answer is No (the

Carriage had not moved) press the Back key.

If you select No (the Carriage had not moved), the Front Panel will display

System Error Code 42:10. For more information on troubleshooting this

error code, refer to Page 2-14. Check also System Error Code 01.1:10

(refer to Page 2-3) or System Error Code 01.0:10 (refer to Page 2-3).

If you select Yes (the Carriage had moved), the Front Panel will display

System Error Code 02:10. For more information on troubleshooting this

error code, refer to Page 2-4. Check also System Error Code 11:10 (refer

to Page 2-7) or System Error Code 01.0:10 (refer to Page 2-3).

If any max. or min. movement length is outside the + or - 20% average, then

this warning message will be displayed on the Front Panel "Some

movements out of avg +-20% range: Intermittent movements. PWM test

needed". This warning means that there is a mechanical problem in the

Printer (Encoder Strip, friction, Carriage Belt, Slider Rod, etc...). Press any

key to continue with the PWM test.

10 The Printer will now start to initialize the Scan-Axis servo and the Front Panel

will display the following information:

 Starting Carriage Motor.

 Off/On Carriage Motor.

 Doing a right side bump.

 Doing a left side bump

 Exit bump position.

If there is a failure at this point, the Front Panel will display System Error

Code 86:10. For more information on troubleshooting this error code, refer

to Page 2-24.

The Printer checks the complete length of the Scan-Axis and displays the result

on the Front Panel. The length has to be between

11 5 8 6 2 9

and

1164616

HP 4000 User Manual

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