|
|
| ||
|
|
| ||
Hint |
| The image defects described in this section are associated with the ADF unit and the scan unit. | ||
|
| For more information about image defects and their causes, see the HP LaserJet 4100 series | ||
|
| printer service manual. |
| |
|
|
| ||
| The MFP output quality is subject to user judgment. This section of the manual helps define | |||
| ||||
| The print samples shown in the following figures illustrate some | |||
| future reference, HP suggests that you keep copies of | |||
| field and an explanation of their causes. |
| ||
|
|
| ||
Hint |
| When troubleshooting image defects, try scanning a test page through the ADF and from the | ||
|
| glass to help isolate the cause of the image defect to the ADF unit, scan unit or the print unit. | ||
|
|
|
| |
| Table 23. Image defects |
| ||
|
|
|
|
|
|
| Problem | Condition | Solution |
|
|
|
|
|
|
| Distorted images | Improper | ● Adjust the belt tension for the pickup |
|
|
| tension. | motor. See “Optical unit” on page 95. |
|
|
|
| ● If the problem persists, replace the |
|
|
|
| belt. See “Optical unit” on page 95. |
Blank page (when | The source document was not | ● Verify that the source document is | ||
using the ADF) | placed in the ADF input tray | |||
|
|
|
|
|
|
|
| The source document was not | ● Remove and then reinsert the source |
|
|
| ||
|
|
| detected in the ADF input tray. | document into the ADF input tray. |
|
|
|
| ● Verify that the |
|
|
|
| (PS2) flag freely moves See “ADF |
|
|
|
| components” on page 56. |
|
|
|
| ● Use the |
|
|
|
| |
|
|
|
| to verify that the sensor, ADF motor, |
|
|
|
| and pickup solenoid are fuctional. See |
|
|
|
| “Diagnostic tests” on page 126. |
|
|
|
|
|
|
|
| A source document was not picked | ● Inspect the ADF pickup and separation |
|
|
| up when attempting to feed multiple | rollers for damage. See “ADF |
|
|
| documents. | components” on page 56. Clean the |
|
|
|
| rollers if dirty. See “Cleaning the |
|
|
|
| product” on page 36. |
|
|
|
|
|
Horizontal lines | Dirty glass, whiteboard cover, ADF | ● Clean the glass, whiteboard cover, | ||
|
|
| delivery guide (clear mylar strip). | and/or ADF delivery guide. See |
|
|
|
| “Cleaning the product” on page 36. |
|
|
|
| |
|
|
|
|
|
|
|
| ADF unit and/or scan unit is | ● Calibrate the scan unit. See |
|
|
| improperly calibrated. | “Calibration” on page 47 and/or |
|
|
| ||
|
|
|
| “Performing manual calibration” on |
|
|
|
| |
|
|
|
| page 48. |
|
|
|
|
|
138 Troubleshooting |
