Konica Minolta bizhub C658 Service Manual page 1506

bizhub C658/C558/C458/C368/C308/C258
4. Replace DFCB.
3.20.7 C8402 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Remove the film stuck on the window of the lower guide assembly.
2. Use the adjustment sheet for double feed detection kit (UK-501), and select [ADF] ->
3. Use the misdetected paper, and select [ADF] ->
4. Check the connector between MFDB/1-SCB CN104 for proper connection and correct as necessary.
5. Check the connector between MFDB/2-SCB CN103 for proper connection and correct as necessary.
6. Check the connector between SCB CN101-DFCB CN8 for proper connection and correct as necessary.
7. MFDB/1 operation check
• Control signal: SCB CN104
• Location of electrical component: DF 11-L
8. MFDB/2 operation check
• Control signal: SCB CN103
• Location of electrical component: DF 10-J
9. Replace SCB.
10. Replace DFCB.
NOTICE
• Link to the wiring diagram (
3.21 C9###
3.21.1 C9401, C9402 (bizhub C658/C558/C458/C368/C308/C258)
(1) Contents
Trouble type
Rank
Trouble detection condition
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Correct the harness connection between SCDB CN3-LU201 if faulty.
2. Check the connector between SCDB CN2-MFPB CN12E for proper connection and correct as necessary. (bizhub C368/C308/C258)
3. Check the connector between SCDB CN2-MFPB CN6E for proper connection and correct as necessary. (bizhub C658/C558/C458)
4. Check the connector between CCDB CN3-MFPB CN1 for proper connection and correct as necessary. (bizhub C368/C308/C258)
5. Check the connector between CCDB PJ3-MFPB CN9 for proper connection and correct as necessary. (bizhub C658/C558/C458)
6. Replace the LED exposure unit.
7. Replace CCDB. (bizhub C368/C308/C258
8. Replace SCDB. (bizhub C368/C308/C258
9. Replace MFPB. (bizhub C368/C308/C258
3.21.2 C9403, C9404 (bizhub C368/C308/C258)
(1) Contents
Trouble type
Rank
Trouble detection condition
C8402: Multi feed detection board failure (When UK-501 is installed)
C
• The AD value went below the predetermined the HI side threshold for two consecutive times.
• The AD value went above the predetermined the LOW side threshold for two consecutive times.
DF
• Multi feed detection board/1 (transmitter) (MFDB/1)
• Multi feed detection board/2 (receiver) (MFDB/2)
• Sensor control board (SCB)
• DF control board (DFCB)
[Multi-Feed
N.3 Dual scan document feeder)
• C9401: Exposure LED lighting failure
• C9402: Exposure LED lighting abnormally
B
• C9401: The output from the CCD sensor is a predetermined value or less during CCD sensor gain
adjustment.
• C9402: The average output value of the CCD sensor with the scanner at its standby position is a
predetermined value or more at the end of a scan job.
Scanner
• LED exposure unit
• Flat cable (LED exposure unit)
• CCD board (CCDB)
• Scanner drive board (SCDB)
• MFP board (MFPB)
(bizhub C368/C308/C258
/ bizhub C658/C558/C458)
/ bizhub C658/C558/C458)
/ bizhub C658/C558/C458)
• C9403: CIS LED lighting failure (When DF-704 is installed)
• C9404: CIS LED lighting abnormally (When DF-704 is installed)
B
• C9403: At the CIS gain adjustment, the machine detected that the output of the CIS LED is lower than the
specified value.
• C9404: After a scan job is completed, the machine detected that the average output of the CIS LED is
greater than the specified value.
[Multi-Feed
DetectionAdj.].
/ bizhub C658/C558/C458)
K-178
K TROUBLESHOOTING > 3. TROUBLE CODE
DetectionAdj.].