Toshiba e-Studio 3555CSE
Troubleshooting. Image 4. Background fogging
Cause/Section | Step | Check item | Measures |
---|---|---|---|
Adjustment | 1 | Perform the shading correction. | Perform FS-05-3218. If an error occurs, retry it. If the error still persists, clean the original glass |
Density reproduction | 2 | Check the gradation reproduction. | Perform the forced performing of image quality closed-loop control (FS-05-2742) and then automatic gamma adjustment. |
Printer section | 3 | Check the printer output image. | Output the test patterns and check them. Using FS-04-36 for each color. See step 7 if defects occur. |
Scanner | 4 | Check if the original glass, mirrors or lens is dirty. | Clean it. |
Parameter adjustment value | 5 | Check the image processing parameters. | Check the value of offsetting adjustment for background adjustment. |
6 | Adjust the image processing parameters. | While checking the above encircled image, adjust the reproduction level by the offsetting adjustment for background adjustment. | |
Cover | 7 | Is the cover installed properly? (Is the drum exposed to the external light?) | Correct it. |
Auto-toner | 8 | Is the auto-toner sensor normal? | Check the operation of autotoner sensor and readjust. |
9 | Is the toner supply operating constantly? | Check the motor and circuits. | |
Main charger output | 10 | Is the main charger output normal? | Check the circuits. |
Developer bias | 11 | Is the developer bias proper? | Check the circuits. |
Developer unit | 12 | Is the contact between the drum and developer material proper? | Check the doctor-to-sleeve gap and pole position. |
Developer material/ Toner/Drum | 13 | Using the specified developer material, toner and drum? | Use the specified developer material, toner and drum. |
14 | Have the developer material and drum reached their PM life? | Replace the developer material and drum. | |
15 | Is the storage environment of the toner cartridge 35oC or less without dew? | Use the toner cartridge stored in the environment within specification. | |
Drum cleaning blade | 16 | Is the drum cleaned properly? | Check the drum cleaning blade pressure. |
Transfer belt cleaning blade | 17 | Is the transfer belt cleaning blade in proper contact with the transfer belt? | Take off the transfer belt and check if the transfer belt cleaning blade pressure spring and pressure hook are installed properly. |
Toner dusting | 18 | Is the toner accumulated on the seals of the developer unit? | Remove the toner and clean the seals. |
* If the trouble is not solved at the step 1 and the step 2 or followings (excluding the parameter adjustment) are performed, make sure to perform “Enforced performing of image quality closed-loop control” and then “Automatic gamma adjustment” after taking a measure.