| Step |
Check description |
Assumed cause |
Measures |
| 1 |
Checking the developer fan motor operation |
Foreign materials such as dust adhere on the developer fan motor. |
Clean the developer fan motor. Execute U037 [DLP1] to [DLP4] and specify the developer fan motor that does not work. Proceed to the next step after specifying. |
| 2 |
Checking the connection |
The connector is not connected properly, or the wire is faulty. |
Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire.
- Developer fan motor - Drum/developer relay PWB
- Drum/developer relay PWB - Feed image PWB
- Feed image PWB - Engine PWB
|
| 3 |
Replacing the developer fan motor |
The developer fan motor is faulty. |
Replace the developer fan motor. |
| 4 |
Replacing the drum/developer relay PWB |
The drum/developer relay PWB is faulty. |
Replace the drum/developer relay PWB. |
| 5 |
Replacing the feed image PWB |
The feed image PWB is faulty. |
Replace the feed image PWB. |
| 6 |
Replacing the engine PWB |
The engine PWB is faulty. |
Replace the engine PWB. |
| Step |
Check description |
Assumed cause |
Measures |
| 1 |
Measuring the input voltage |
The power cord has no continuity. |
Plug the power cord into another wall outlet. |
| 2 |
Checking the power cord |
The power plug of the power cord is faulty. |
If the power plug is deformed or faulty, replace the power cord. |
| 3 |
Checking the power cord |
The power cord is faulty. |
If there is no continuity of the power cord, replace the power cord. |
| 4 |
Checking the main power switch |
The main power switch is faulty. |
Check the continuity between the contacts of the main power switch, and replace the main power switch if there is no continuity. |
| 5 |
Checking the low voltage PWB |
The connector is not connected properly. The wire or the PWB is faulty. |
Clean the terminal of the connectors on the low voltage PWB, then reconnect the wire connector. If the wire is faulty, repair or replace it. If not repaired, replace the low voltage PWB. |
| 6 |
Replacing the power switch |
The power switch is faulty. |
Check the power switch. Replace it if there is no continuity. |
| 7 |
Checking the engine PWB |
The connector or FFC terminal is not connected properly. Or, the wire, FFC, PWB is faulty. |
Check if the 10th pin of connector YC29 on the engine PWB generates 24V. When it does not generate 24V, clean a the terminals of the connector on the engine PWB and reinsert the wire connector and the FFC terminal. If the wire or FFC is faulty, repair or replace it. If not repaired after that, replace the engine PWB.w |
| 8 |
Checking the main PWB |
The connector or FFC terminal is not connected properly. Or, the wire, FFC, PWB is faulty. |
Clean the terminal of the connectors on the main PWB, then reconnect the wire connector and reconnect the FFC terminal. If the wire or the FFC is faulty, repair or replace it. If not repaired, replace the main PWB. |