Konica Minolta bizhub C658 Service Manual page 1499

bizhub C658/C558/C458/C368/C308/C258
3.18.11 C6753 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition When starting the machine, verification on reading and writing the predetermined value for image processing
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Correct the harness connection between CIS J101-DSIPB CN2 if faulty.
2. Correct the harness connection between DSIPB CN1-MFPB CN24 if faulty.
3. Replace CIS.
4. Replace DSIPB.
5. Replace MFPB.
3.18.12 C6754, C6755 (bizhub C368/C308/C258)
(1) Contents
Trouble type
Rank
Trouble detection condition
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Correct the harness connection between CIS and DSIPB if faulty.
2. Correct the harness connection between CIS J222-CISPU J2 if faulty.
3. Check for possible extraneous light and correct as necessary.
4. Clean the back side reading glass and the shading sheet if dirty.
5. Replace CIS.
6. Replace DSIPB.
7. Replace CISPU.
8. Replace MFPB.
3.18.13 C6754, C6755 (bizhub C658/C558/C4588)
(1) Contents
Trouble type
Rank
Trouble detection condition
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Correct the harness connection between CIS J101-DSIPB CN2 if faulty.
2. Correct the harness connection between CIS J102-DFPU CN2 if faulty.
3. Check for possible extraneous light and correct as necessary.
4. Clean the back side reading glass and the shading sheet if dirty.
5. Replace CIS.
6. DFPU ICP1 conduction check.
7. Replace DFPU.
8. Replace DSIPB.
9. Replace MFPB.
C6753: ASIC clock input error (back side)
C
ASIC on dual scan image processing board was conducted, and verification failure was detected.
-
• CIS module (CIS)
• Dual scan image processing board (DSIPB)
• MFP board (MFPB)
• C6754: CIS clamp adjustment failure (When DF-704 is installed)
• C6755: CIS gain adjustment failure (When DF-704 is installed)
B
• C6754: After the gain adjustment is performed at the start-up, the CIS clamp adjustment value is too high or
too low.
• C6755: After the gain adjustment is performed at the start-up, the peak value of the output data is lower
than a given value.
Scanner
• CIS module (CIS)
• Dual scan image processing board (DSIPB)
• CIS power supply (CISPU)
• MFP board (MFPB)
• C6754: CIS clamp adjustment failure
• C6755: CIS gain adjustment failure
B
• C6754: After the gain adjustment is performed at the start-up, the CIS clamp adjustment value is too high or
too low.
• C6755: After the gain adjustment is performed at the start-up, the peak value of the output data is lower
than a given value.
Scanner
• CIS module (CIS)
• Dual scan image processing board (DSIPB)
• DF power supply (DFPU)
• MFP board (MFPB)
K TROUBLESHOOTING > 3. TROUBLE CODE
K-171