d-Color MF4003/MF3303
L TROUBLESHOOTING > 3. TROUBLE CODE
L-34
6. Check the connector between the imaging unit/K-relay CN6-BASEB CN14E for proper connection and correct as necessary. (C2557)
7. Check the connector between M4-BASEB CN13E for proper connection and correct as necessary.
8. Check the connector between M5-BASEB CN13E for proper connection and correct as necessary.
9. Check CPUB for proper installation and correct as necessary.
10. M4, M5 operation check
• Control signal: BASEB CN13E-1 to 4 (M4), BASEB CN13E-5 to 8 (M5)
• Location of electrical component: 4-C
11. Replace the corresponding imaging unit.
12. Replace CPUB.
13. Replace BASEB.
3.8.6C2552, C2554, C2556, C2558
Contents
Trouble type • C2552: Abnormally high toner density detected cyan TCR sensor
• C2554: Abnormally high toner density detected magenta TCR sensor
• C2556: Abnormally high toner density detected yellow TCR sensor
• C2558: Abnormally high toner density detected black TCR sensor
Rank B
Trouble detection condition 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.
Trouble isolation -
Relevant electrical parts • Imaging unit/C,M,Y,K
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1. Reinstall the imaging unit.
2. Check the connector between the imaging unit/C-relay CN5-EXCB CN14E for proper connection and correct as necessary. (C2552)
3. Check the connector between the imaging unit/M-relay CN8-EXCB CN14E for proper connection and correct as necessary. (C2554)
4. Check the connector between the imaging unit/Y-relay CN7-EXCB CN14E for proper connection and correct as necessary. (C2556)
5. Check the connector between the imaging unit/K-relay CN6-EXCB CN14E for proper connection and correct as necessary. (C2558)
6. Check CPUB for proper installation and correct as necessary.
7. Replace the corresponding imaging unit.
8. Replace CPUB.
9. Replace BASEB.
3.8.7C2559, C255A, C255B, C255C
Contents
Trouble type • C2559: Cyan TCR sensor adjustment failure
• C255A: Magenta TCR sensor adjustment failure
• C255B: Yellow TCR sensor adjustment failure
• C255C: Black TCR sensor adjustment failure
Rank B
Trouble detection condition TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
Trouble isolation -
Relevant electrical parts • Imaging unit/C,M,Y,K
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1. Reinstall the imaging unit.
2. Check the connector between the imaging unit/C-relay CN5-BASEB CN14E for proper connection and correct as necessary. (C2559)
3. Check the connector between the imaging unit/M-relay CN8-BASEB CN14E for proper connection and correct as necessary. (C255A)
4. Check the connector between the imaging unit/Y-relay CN7-BASEB CN14E for proper connection and correct as necessary. (C255B)
5. Check the connector between the imaging unit/K-relay CN6-BASEB CN14E for proper connection and correct as necessary. (C255C)
6. Check CPUB for proper installation and correct as necessary.
7. Replace the corresponding imaging unit.
8. Replace CPUB.
9. Replace BASEB.
3.8.8C2561, C2562, C2563, C2564
Contents
Trouble type • C2561: Cyan TCR sensor failure
• C2562: Magenta TCR sensor failure
• C2563: Yellow TCR sensor failure
• C2564: Black TCR sensor failure
Rank B
Trouble detection condition • Alarm signals for each TCR sensor is detected more than the predetermined number of times.
• This detection is used for detecting disconnection of TCR sensor connector.
Trouble isolation -
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