Basic troubleshooting

Table 13. Basic troubleshooting

# Verification steps

Possible problems

Solutions

A Does the printer turn 1 on successfully?

When the product is connected to a grounded power source, the printer motor should rotate for approximately five

No power.

1. Verify that the product is plugged in.

2. Verify that the power cable is functional and that the power switch is on (220v only).

3. Verify that FU102 on the ECU is not open.

4. If all of these conditions are correct, replace the ECU.

seconds.

Printer motor does not rotate.

1. Verify that the toner cartridge is present. (See "Toner cartridge" on page 78 for more information.)

2. Verify that the printer door is closed.

3. Verify that media is loaded in the main input tray.

4. Verify that the printer paper path and door sensors are functional.

5. Verify that the motor connector is seated into the ECU.

6. Verify that the motor is correctly mounted on the printer chassis.

7. If all of these conditions are correct, replace the ECU.

8. If, after replacing the ECU, the printer motor still does not rotate, replace the motor.

O Is the product ready?

The control panel should function without error light

Control panel displays an error light pattern.

Consult the list of control panel light patterns later in this chapter to identify and correct the error.

patterns.

Control panel is not functional.

1. Verify that the control panel cable is seated in the formatter.

2. If the cable is connected correctly, replace the control panel.

Do engine tests and w self-test pages print?

Print an engine test. (See

Note The formatter must be connected to perform an engine test.

page 149.)The engine test should print without paper-feed problems or print-quality problems.

Engine test is not successful.

Replace the ECU.

Control panel displays an error light pattern.

Consult the list of control panel light patterns in this chapter to identify and correct the error.

Media does not move smoothly through the printer paper path.

Isolate printer paper-path problems by performing a paper-path check, which is discussed later in this chapter.

Poor print quality.

See "Solving image-quality problems" on page 138.

# Verification steps

# Verification steps

Is the software installed correctly?

If the optional copier/ scanner is installed, does it scan to the computer?

Possible problems

Solutions

Software is not installed, or an error occurred during software installation.

Uninstall and then reload the product software. Make sure you use the correct installation procedure and the correct port setting.

The cable is not connected correctly.

Reconnect the cable.

An incorrect printer driver is selected.

Select the correct printer driver.

Other devices are connected to the parallel port.

Disconnect the other devices and try again to print.

There is an LPT port driver problem.

Reset the computer port settings. See your computer user guide for instructions.

The formatter has failed.

Replace the formatter

Copier/scanner motor does not rotate.

1. Run a self-test page, and verify that the optional copier/scanner is present. (See "To print a self-test page" on page 159.)

2. Unplug the printer, verify that the copier/ scanner connector is seated in the formatter, and plug the printer back in.

3. If the printer still has an error, replace the copier/scanner.

Poor copy quality.

1. If the print quality from the internal tests was acceptable, but the print quality of the copies is not, clean the contact image sensor and the white sheet.

2. If the print defect persists, replace the copier/scanner assembly.

Media does not move smoothly through the copier/scanner path.

1. Clear the copier/scanner path of obstructions.

2. Check the photosensor to make sure that it operates correctly.

3. If the problem persists, replace the copier/scanner assembly.

Other devices are connected to the parallel port.

Disconnect the other devices, and try to scan again.

The computer parallelport hardware is not bidirectional.

Check hardware documentation to see if the port configuration can be changed.

The BIOS settings for the parallel port are set incorrectly.

Reset the computer port settings. If the problem persists, reset the BIOS settings in CMOS.

Polling is turned off in HP LaserJet Director or HP LaserJet Director is not running.

Start HP LaserJet Director and turn on polling.

Is the software installed correctly?

Does the product print from the computer?

Connect the parallel cable or USB cable to the product and the computer. Use a word-processing application to send a print job to the printer.

If the optional copier/ scanner is installed, is the copy function operational?

Place the self-test page into the media input tray and copy it to the printer. The report should feed smoothly through the copier/scanner path and copies should print without print-quality problems.

If the optional copier/ scanner is installed, does it scan to the computer?

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