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HP LaserJet 9000dn Service Manual: Sheet Stapler/stacker And Stacker Diagnostics

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3000-sheet stapler/stacker and stacker diagnostics

Setting the device to service mode
Perform the following steps to put the device into service mode:
CAUTION
Make sure the printer is turned off before performing this test. If the printer is on when service mode
is enabled, damage to the device and/or the printer could occur.
1
Remove the controller PCB cover.
2
Slide the service mode switch on the controller PCB to the "ON" position (toward you).
Note
Once the device has entered service mode, a short self-test will be performed. The green error light
will be blinking if no jams or malfunctions were detected.
To exit service mode
1
Slide the service mode switch on the controller PCB back to the normal position.
2
Reinstall the controller PCB.
Note
Press the interlock switch during the test to perform a reset to start the test over.
C8519-90912
Accessories diagnostics 249

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