Olivetti d-Color MF4003 Service Manual page 446

d-Color MF4003/MF3303
2. Check the connector of CL2 for proper drive coupling and correct as necessary.
3. CL2 conduction check
• Control signal: BASEB CN23E-10 (ON)
• Location of electrical component: 9-K
4. Replace CL2.
5. Replace BASEB.
3.13.6 C720A
Contents
Trouble type C720A: Registration clutch failure
Rank C
Trouble detection condition After starting the clutch, an error is detected for the malfunction detection signal.
Trouble isolation -
Relevant electrical parts
Procedure
1. Check the connector between CL4-relay CN45-BASEB CN22E for proper connection and correct as necessary.
2. Check the connector of CL4 for proper drive coupling and correct as necessary.
3. CL4 conduction check
• Control signal: BASEB CN22EA-3 (ON)
• Location of electrical component: 12-C
4. Replace CL4.
5. Replace BASEB.
3.13.7 C720B
Contents
Trouble type C720B: 1st transfer pressure clutch failure
Rank C
Trouble detection condition After starting the clutch, an error is detected for the malfunction detection signal.
Trouble isolation -
Relevant electrical parts
Procedure
1. Check the connector between CL1-relay CN13-BASEB CN18E for proper connection and correct as necessary.
2. Check the connector of CL1 for proper drive coupling and correct as necessary.
3. CL1 conduction check
• Control signal: BASEB CN18E-4 (ON)
• Location of electrical component: 2-C
4. Replace the main drive unit.
5. Replace BASEB.
3.13.8 C720D
Contents
Trouble type C720D: ADU transport clutch failure
Rank C
Trouble detection condition After starting the clutch, an error is detected for the malfunction detection signal.
Trouble isolation -
Relevant electrical parts
Procedure
1. Check the connector between CL5-relay CN47-BASEB CN23E for proper connection and correct as necessary.
2. Check the connector of CL5 for proper drive coupling and correct as necessary.
3. CL5 conduction check
• Control signal: BASEB CN23E-12 (ON)
• Location of electrical component: 9-K
4. Replace CL5.
5. Replace BASEB.
3.13.9 C720E
Contents
Trouble type C720E: ADU forward rotation clutch failure
Rank C
Trouble detection condition After starting the clutch, an error is detected for the malfunction detection signal.
Trouble isolation -
Service Manual
• Registration clutch (CL4)
• Base board (BASEB)
• 1st transfer pressure clutch (CL1)
• Base board (BASEB)
• ADU transport clutch (CL5)
• Base board (BASEB)
L TROUBLESHOOTING > 3. TROUBLE CODE
L-48
Y119930-3