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
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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:
n
Friction problems with worn out slider rod or Carriage Bushings.
Service Tests and Utilities
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Blockage due to problems with the Service Station.
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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
NOTEIn 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
Menu
Back
Enter
2 Once inside the Setup Menu, Press the following key combination
to access the special Se rvice Menu.
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Set-up menu
Printe r in fo rmation
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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
T
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Printer information
I/O set-up
Front panel
Altitude = 0-1000 m.
Log
Menu
Back
Enter
Menu
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
Menu
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
Menu
Back
Enter
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Service Tests and Utilities
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Ink Supp ly S tation
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.
NOTEThis Service Test can be perf ormed by the End User with the
guidance of a HP Support person via the phone.
WARNINGIF 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
Menu
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
Menu
Back
Enter
WARNINGIF 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.
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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:
n
Friction problems with worn out slider rod or Carriage Bushings.
n
Blockage due to problems with the Service Station.
n
Problems with encoder sensing.
NOTEThis Service Test can be perf ormed by the End User with the
guidance of a HP Support person via the phone.
WARNINGIF 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
Menu
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
Menu
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
Menu
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
HP DesignJets 500 and 800 Series Pr inters Service Manual
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