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Lexmark CX725

Lexmark CX725

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Toner patch sensing service check

    Pre‑check procedure

  1. Open and close the toner door a few times to clean the sensor (TPS) lenses.

  2. Enter the Diagnostics menu, and then navigate to:

    Printer diagnostics & adjustments > Color alignment adjust

  3. On the AA adjustment row, touch Start.

    Note:  This triggers the auto align routine which performs the color alignment error corrections (0.42 mm, 0.84 mm, and 3 mm range).

    Note:  If the AA adjustment is successful, an AA adjustment passed message appears on the screen. If an AA adjustment passed message does not appear, skip the next pre-check step, and then go directly to step 4 in the service check.

  4. Enter the Diagnostics menu, and then navigate to:

    Printer setup > EP setup > Toner patch sensor adjust > Full calibration

    Note:  This triggers the auto align routine (0.42 mm range only).

ActionYesNo

Step 1

  1. From the home screen, touch Settings > Reports > Print Quality Pages.

  2. On the Device information section of the print quality test page, check the CalSet values of the following:

    • C Developer operating point
    • C Laser operating point
    • C Linearization stat
    • M Developer operating point
    • M Laser operating point
    • M Linearization stat
    • Y Developer operating point
    • Y Laser operating point
    • Y Linearization stat
    • K Developer operating point
    • K Laser operating point
    • K Linearization stat

Are the values 0?

Go to step 2.

The problem is solved.

Step 2

Perform the blank or white pages service check. See Blank or white pages check.

Was an issue found and resolved?

Go to step 3.

Go to step 4.

Step 3

Perform the auto alignment service check. See Auto alignment service check.

Does the problem remain?

Go to step 4.

The problem is solved.

Step 4

  1. Enter the Diagnostics menu, and then navigate to:

    Printer setup > EP setup > Toner patch sensor adjust

  2. On the sensor gain characterization row, touch Start.

  3. On the sensor gain verification row, touch Start.

  4. On the sensor gain verification section of the test page, check the average signal values of the patch number.

Are the values within the requirement?

The problem is solved.

Go to step 5.

Step 5

  1. Remove the imaging kit.

  2. Move the TPS wiper mechanism lever up and down.

Does the wiper mechanism properly move?

Go to step 8.

Go to step 6.

Step 6

  1. Reinstall, repair, or replace the TPS sled and wiper mechanism.

  2. Perform the auto alignment service check. See Auto alignment service check.

Does the problem remain?

Go to step 7.

The problem is solved.

Step 7

Check the cable on the sensor (TPS) and on the JTPSAA1 connector on the controller board for proper connection, and reseat if necessary.

Does the problem remain?

Go to step 8.

The problem is solved.

Step 8

  1. Replace the sensor (TPS). See Sensor (TPS) removal.

  2. Enter the Diagnostics menu, and then navigate to:

    Printer setup > EP setup > Toner patch sensor adjust

  3. On the sensor gain characterization row, touch Start.

  4. On the sensor gain verification row, touch Start.

  5. On the sensor gain verification section of the test page, check the average signal values of the patch number.

Are the values within the requirement?

The problem is solved.

Contact the next level of support.
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