Description: Imaging unit/K new article release The status with the new unit is not cleared after the new imaging unit is set.
Causes: • Imaging unit/K • CPU board (CPUB) • Base board (BASEB)
Remedy: 1. Reinstall the imaging unit. 2. Check the connector between the imaging unit/K-relay CN6-BASEB CN14E for proper connection and correct as necessary. 3. Check CPUB for proper installation and correct as necessary. 4. Replace the imaging unit. 5. Replace CPUB. 6. Replace BASEB.
Code: C2557
Description: Abnormally low toner density detected black TCR sensor When sampling data is determined in TC ratio calculation control, TCR sensor output is lower than a predetermined value for a predetermined number of times in a row even though there is toner in the toner cartridge.
Causes: • Imaging unit/K • Toner transport motor (M4) • Toner supply motor (M5) • CPU board (CPUB) • Base board (BASEB)
Remedy: 1. Perform image troubleshooting procedure if image density is low. 2. Reinstall the imaging unit. 3. Check the connector between the imaging unit/K-relay CN6-BASEB CN14E for proper connection and correct as necessary. 4. Check the connector between M4-BASEB CN11E for proper connection and correct as necessary. 5. Check the connector between M5-BASEB CN11E for proper connection and correct as necessary. 6. Check CPUB for proper installation and correct as necessary. 7. M4, M5 operation check • Control signal: BASEB CN11E-1 to 4 (M4), BASEB CN11E-5 to 8 (M5) • Location of electrical component: 4-C 8. Replace the imaging unit. 9. Replace CPUB. 10. Replace BASEB.
Code: C2558
Description: Abnormally high toner density detected black TCR sensor TC ratio in the imaging unit, which is determined by toner replenishing amount control mechanism, is a predetermined value or more for a given number of times consecutively.
Causes: • Imaging unit/K • CPU board (CPUB) • Base board (BASEB)
Remedy: 1. Reinstall the imaging unit. 2. Check the connector between the imaging unit/K-relay CN6-EXCB CN14E for proper connection and correct as necessary. 3. Check CPUB for proper installation and correct as necessary. 4. Replace the imaging unit. 5. Replace CPUB. 6. Replace BASEB.
Code: C255C
Description: Black TCR sensor adjustment failure TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
Causes: • Imaging unit/K • CPU board (CPUB) • Base board (BASEB)
Remedy: 1. Reinstall the imaging unit. 2. Check the connector between the imaging unit/K-relay CN6-BASEB CN14E for proper connection and correct as necessary. 3. Check CPUB for proper installation and correct as necessary. 4. Replace the imaging unit. 5. Replace CPUB. 6. Replace BASEB.
Code: C2564
Description: Black TCR sensor failure • Alarm signals for the TCR sensor is detected more than the predetermined number of times. • This detection is used for detecting disconnection of TCR sensor connector.
Causes: • Imaging unit/K • CPU board (CPUB) • Base board (BASEB)
Remedy: 1. Reinstall the imaging unit. 2. Check the connector between the imaging unit/K-relay CN6-BASEB CN14E for proper connection and correct as necessary. 3. Check CPUB for proper installation and correct as necessary. 4. Replace the imaging unit. 5. Replace CPUB. 6. Replace BASEB.
Code: C2650
Description: Main backup media access error • The error was found when reading out the data. • The re-written data, which has been read out, checked and founded as error, is read out again and found as error. • The error was found when reading out the counter value. • The main body detects that the backup board is not mounted.
Causes: • Backup board (ERB) • CPU board (CPUB) • Base board (BASEB)
Remedy: 1. Check the connector between ERB CN1-BASEB CN20E for proper connection and correct as necessary. 2. Check CPUB for proper installation and correct as necessary. 3. Replace CPUB. 4. Replace BASEB. 5. Replace ERB. a. Replace the current ERB with a new one. b. Replace the following components with new ones. When the transfer belt unit, transfer roller and the fusing unit have been replaced with new ones, carry out the [Service Mode] -> [Counter] - > [Life] -> [New Release]. • Imaging unit • Transfer belt unit • Fusing unit • Transfer roller • Feed roller, pick-up roller, separation roller (including options) • Separation pad • Toner filter 3. Turn ON the main power switch and check to see that warm-up is started. Make sure that malfunction codes other than C2650 or improper IU/TC placement is not detected. 4. Set the various setting values again. 6. If the above actions do not solve the problem, contact KM.