HP DesignJet 500, DesignJet800 Service Manual

Service Tests and Utilities

Introduction 4-2

Diagnostics - Self Test 4-2

Service Tests (Diagnostics) 4-3

Entering the Service Tests Menu 4-4 Ink Supply Station 4-6 Carriage Movement 4-8 Paper Advance Test 4-10

Service Utilities 4-1 3

Entering the Service Utilities Menu 4-14 EEROM Setup 4-16 Turn Drive Roller 4-21 Unlock Carriage 4-22 Prime Tubes 4-23 Change Cutter 4-24 Change Ink Tubes 4-25 Printer Inform ation 4-26

HP DesignJets 500 and 800 Series Printers Service Manual

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Service Tests and Utilities

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Introduction

This chapter explains how to use the built-in Service Tests and Service Utilities and what to do if any of the Service Tests fail. If possible, always perform a Service Test on the component that you are about to replace, just to make sure that is the component that has failed. If the test on that component passes, there is no need to replace it.

Phone Support

In certain circumstances, a Call Agent can try and troubleshoot the Printer by requesting the Customer to perf orm a Service T es t via the phone. Using this process, it can be determined whether the Printer requires any on-site maintenance.

Diagnostics - Self Test

Initialization Sequences

Whenever the Printer is switched ON, it automatically performs a series of internal self tests and mechanical initialization sequences. If any of the parts fail, a system error will appear and you should consult Chapter 2 - Sys te m Error Codes.

Entering Service Menu at Power Up - Only for Onsite Repair

If the Printer fails to initialize completely because of a System Error and you need to use the Service Menu (Service Tests and Utilities), the Printer can be powered up in Service Mode by pressing the Up and Enter keys while switching the Printer ON. This will give you access to some of the Service Tests and Utilities without having to complete the System Initialization (if you perform some of the tests, they will need to initialize the relevant part of the System).

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HP DesignJets 500 and 800 Series Printers Service Manual

Service Tests (Diagnostics)

The following is a list of all internal Service T es ts ava ilable in the Printer. Instructions for entering the Service Tests menu are given on Page 4-4.

1 Ink Supply Station ⇒ Page 4-6

The purpose of this test is to verify the operation of the Ink Supply Station. A failure of the out-of-ink sensors or the springs in the Ink Supply Station will eventually damage the Printheads because the Printer will try to pump ink from an empty Ink Cartridge stall, which will cause the Printhead to dry-fire.

2 Carriage Movement ⇒ Page 4-8

The purpose of this test is to verify the movement of the scan-axis components at several speeds. This test checks for the following problems:

Friction problems with worn out slider rod or Carriage Bushings.

Service Tests and Utilities

Blockage due to problems with the Service Station.

Problems with encoder sensing.

3 Paper Advance ⇒ Page 4-10

The purpose of this test is to identify whether there is too much friction in the paper-axis drive system which is caused by defects with the Transmission Gears, Drive Roller or the Paper-Axis Motor.

4 Troubleshooting ⇒ Page 6-4

The Printer contains an internal Troubleshooting procedure which helps you to diagnose and resolve the possible source of any Image Quality or Line Quality defects. If Print Quality is poor at anytime, the Troubleshooting procedure should be performed which will determine whether the Printhead needs replacing (by marking it with an exclamation mark) or not after performing various levels of recovery actions.

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Service Tests and Utilities

Entering the Service Tests Men u

NOTE In order to enter the Service Utility Men u, please refer t o the

instructions on Page 4-14.

1 Press the ↑ or ↓ key until the front panel displays the

then press Enter

Set-up menu

Press ENTER for Set-up menu

Setup Menu and

Back

Enter

2 Once inside the Setup Menu, Press the following key combination

to access the special Se rvice Menu.

Set-up menu

Printe r in fo rmation

PPO

I/O set-up Front panel Altitude = 0-1000 m. Log

For On-site Engineers, press the Up and Enter keys to access t h e com p lete list of Service Tests.

Set-up menu

Printer information I/O set-up Front panel Altitude = 0-1000 m. Log

Back

Enter

Back

Enter

4-4

For Call Agents who will request the User to perfo rm certain troubleshooting actions, press the Down and Enter keys to access a limited list of Service Tests.

3 Once inside the Service Tools Menu, press the ↑ or ↓ key until the

front panel displays Service Tests and then press Enter.

Service tools

Service tests Service cal ibrations Servic e u tilities

HP DesignJets 500 and 800 Series Printers Service Manual

Back

Enter

Service Tests and Utilities

4 Press the Enter key to begin a specific test when the required

Service Test is highlighted.

Service tests

Troubleshooting Aeroso l F an te st Ink Supply Station Paper advance test Carriage movement test

Back

Enter

HP DesignJets 500 and 800 Series Pr inters Service Manual

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Service Tests and Utilities

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Ink Supp ly S tation

NOTE This Service Test can be perf ormed by the End User with the

guidance of a HP Support person via the phone.

WARNING IF POSSIBLE ALWAYS PERFORM THIS TEST BEFORE

REPLACING THE INK SUPPLY STATION. IF THIS TEST PASSES, DO NOT REPLACE THE INK SUPPLY STATION.

Perform the Ink Supply Station test as follows:

1 In the Service Tests submenu, scroll to "Ink Supply Station" and

press Enter.

Service tests

Troubleshooting Aeroso l F an te st Ink Supply Station Paper advance t est Carriage m ovem ent test

Back

Enter

2 Once the test starts, the following message will appear on the Front

Panel. Open the Ink Cartridge door and remove ALL the Ink Cartridges:

ISS Test

Remove all the ink cartridges

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HP DesignJets 500 and 800 Series Printers Service Manual

Service Tests and Utilities

3 Once all the Ink Cartridges are removed the Printer will check the

Ink Supply Station. During this short period, the following message will be displayed:

ISS Test

Please wait.

Checking

4 If the Printer detects all the out-of-ink signals, the Ink Supply

Station has passed the test and the following me ssage will appear on the Front Panel:

ISS Test

Test result OK. INK SUPPLY STATION OK. Press EN T E R to ret u rn t o menu

Back

Enter

WARNING IF THIS TEST PASSES, DO NOT REPLACE THE INK

SUPPLY STATION.

5 If the Printer does not detect all the out-of-ink signals then the Ink

Supply Station must be faulty and the following message will appear on the Front Panel:

ISS Test

Test result 22:10 Faulty INK SUPPLY STATION Call HP representative

In this case, to resolve the problem, try the following:

1 Replace the Ink Supply Station Assembly ⇒ Page 8-48.

HP DesignJets 500 and 800 Series Pr inters Service Manual

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Service Tests and Utilities

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Carriage Movement

The purpose of this test is to verify the movement of the scan-axis components at several speeds. This test checks for the following problems:

Friction problems with worn out slider rod or Carriage Bushings.

Blockage due to problems with the Service Station.

Problems with encoder sensing.

NOTE This Service Test can be perf ormed by the End User with the

guidance of a HP Support person via the phone.

WARNING IF POSSIBLE ALWAYS PERFORM THIS TEST BEFORE

REPLACING THE CARRIAGE ASSEMBLY. IF THIS TEST PASSES, DO NOT REPLACE THE CARRIAGE ASSEMBLY.

Perform the Carriage Movement test as follows:

1 In the Service Tests submenu, scroll to "Carriage movement" and

press Enter.

Service tests

Troubleshooting Aerosol Fan test Ink Supply Station Paper advance test Carriage movement te st

Back

Enter

2 The test will start and the following message will appear on the

Front Panel:

Carriage movement

Carriage movement te st

Moving Carriage. Pleas e w ait

3 Once the Printer has completed the test it will analyze the data

received while performing the test. Once the data has been analyzed, the following message will appear on the Front Panel:

Carriage movement

Carriage movement test

Back

Ready to display results. Press ENTER

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HP DesignJets 500 and 800 Series Printers Service Manual

Enter

Service Tests and Utilities

4 If you press Enter, the Front Panel will display a list of the

different results you can view. You can make your selection using the arrow keys and press Enter to view the selection.

Test results. Select item for more information

PWM Speed offset Stabilization distance

Back

Enter

5 If you selected PWM, the Front Pane l will dis pla y the re s ults of the

PWM test:

PWM results

Average value of the PWM

Average: XXX Std dev: X

St andard deviation value of the PWM

6 If you selected Speed offset, the Front Panel will display the re sults

of the Speed offset:

Speed offset results

Average value of the speed of fset

Average (ips ): X Std dev (ips): X

Sta ndard deviation value of the speed of fset

7 If you selected Stabilization distance, the Front Panel will display

the results of the Stabiliza tion distance:

Stabilization distance results

Stabilizat. dist. (mm): XX

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