2-5. Troubleshooting by Symptom
| Symptom | Solution |
Faulty operation | The power does not turn on. | - Confirm the connection of |
| The power turns off immediately after | - the power cord, and |
| - between the logic board and the power supply unit. | |
|
| - Replace the |
|
| - power supply unit, or |
|
| - logic board. |
| A strange noise occurs. | - Remove foreign material. |
|
| - Attach a removed part if any. |
|
| - Check the operation of the moving parts (such as purge unit, |
|
| carriage unit, and paper feeding mechanism) |
|
| - Replace a faulty part, if any. |
| Nothing is displayed on the LCD. | - Confirm the connection between the operation panel, the LCD |
|
| unit, and the logic board. |
|
| - Replace the |
|
| - LCD unit, or |
|
| - logic board. |
| A portion of the LCD is not displayed. | - Perform the button and LCD test in the service mode, and |
|
| confirm that the LCD is displayed without any segments |
|
| missing. |
|
| - Confirm the connection between the operation panel, the |
|
| scanning unit, and the logic board. |
|
| - Replace the |
|
| - LCD unit, or |
|
| - logic board. |
| Paper feed problems | - Examine the inside to confirm that no parts are damaged, and |
| feeding, no feeding). | the rollers are clean. |
|
| - Remove foreign material. |
|
| - Adjust the paper guide properly. |
|
| - |
|
| - Confirm the selected paper source. |
|
| - Confirm that the rear cover fits in place properly (for paper |
|
| feeding from the front feeder). |
|
| - Confirm the connection of each harness and the logic board. |
|
| - Replace the |
|
| - sheet feeder unit, |
|
| - ASF cover unit, |
|
| - bottom case unit (for paper feeding from the front feeder), or |
|
| - logic board. |
Carriage movement problems (contact to other parts, strange noise).
Faulty scanning (no scanning, strange noise).
Unsatisfactory print quality No printing, or no color ejected.
-Confirm that the carriage timing slit strip film is free from damage or grease.
-Clean the carriage timing slit strip film (with ethanol and lint- free paper).
-Remove foreign material.
-Replace the
-carriage timing slit strip film, or
-carriage unit.
-Confirm the connection between the scanning unit and the logic board.
-Replace the
-scanning unit, or
-logic board.
-Confirm that the ink tanks are installed properly.
-Perform print head maintenance.
-Replace the
-ink tank,
