Olivetti d-Color MF4003 Service Manual page 443

d-Color MF4003/MF3303
Procedure
1. Check the connector between IR CIS-BASEB CN6 for proper connection and correct as necessary.
2. Check CPUB for proper installation and correct as necessary.
3. Replace IR CIS.
4. Replace CPUB.
5. Replace BASEB.
3.12.7 C6753
Contents
Trouble type C6753: ASIC clock input error (back side)
Rank C
Trouble detection condition When starting the machine, verification on reading and writing the predetermined value for CPU (image
processing section) on CPU board (CPUB) was conducted, and verification failure was detected.
Trouble isolation Scanner
Relevant electrical parts
Procedure
1. Check the connector between DF CIS-BASEB CN5 for proper connection and correct as necessary.
2. Check CPUB for proper installation and correct as necessary.
3. Replace the DF CIS module assy.
4. Replace CPUB.
5. Replace BASEB.
3.12.8 C6754, C6755
Contents
Trouble type
Rank B
Trouble detection condition
Trouble isolation Scanner
Relevant electrical parts
Procedure
1. Check the connector between DF CIS-BASEB CN5 for proper connection and correct as necessary.
2. Check CPUB for proper installation and correct as necessary.
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 the DF CIS module assy.
6. Replace CPUB.
7. Replace BASEB.
3.12.9 C6756
Contents
Trouble type C6756: CIS power-supply voltage malfunction
Rank C
Trouble detection condition Power is not supplied to CIS after the lapse of a given period of time after the main power switch or power key is
turned ON or the machine recovers from the sleep mode.
Trouble isolation -
Relevant electrical parts
Procedure
1. Check the connector between IR CIS-BASEB CN6 for proper connection and correct as necessary.
2. Check the connector between BASEB CN2E-DCPS CN5 for proper connection and correct as necessary.
3. Check CPUB for proper installation and correct as necessary.
4. Replace IR CIS.
5. Replace CPUB.
6. Replace BASEB.
7. Replace DCPS.
Y119930-3
• DF CIS module (DF CIS)
• CPU board (CPUB)
• Base board (BASEB)
• C6754: CIS clamp adjustment failure
• C6755: CIS gain adjustment failure
• 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.
• DF CIS module (DF CIS)
• CPU board (CPUB)
• Base board (BASEB)
• CIS module (IR CIS)
• DC power supply (DCPS)
• CPU board (CPUB)
• Base board (BASEB)
L TROUBLESHOOTING > 3. TROUBLE CODE
L-45
Service Manual