Ricoh Aficio Color 3006 Service Manual page 440

SC CODES
SC
Item Detection Conditions
No.
SC170 Video - Timing -
processing
Just after the main switch is
error 1
turned on (after auto gain
control on the scanner IPU
board)
- Condition -
The corrected CCD odd/even
pixel black level difference is
not in the proper range.
SC171 Video - Timing -
processing
Same as SC170
error 2
- Condition -
The corrected black level is
not in the proper range.
SC172 Video - Timing -
processing
Same as SC170
error 3
- Condition -
The corrected white level is
not in the proper range.
Related
Possible Causes
SCs
• Poor connection of
CCD flat cable
• Defective scanner
IPU board
• Defective CCD
Same as SC170
• Poor connection of
CCD cable
• Dirty optics
• Defective lamp
regulator
• Defective scanner
IPU board
• Defective CCD
4
Troubleshooting Procedure
1. Check if the flat cable is firmly connected at CN421 and
CN404 on the SBU and scanner IPU board.
2. Check the continuity of the flat cable.
3. Replace the scanner IPU board.
4. Replace the SBU unit.
Same as SC170.
1. Check SP 4-426-001 to 006 (RGB Gain). If their values
are near "255", clean the optics section (exposure
glass, white plate, mirrors, and lens).
2. Visually check if the exposure lamp turns on during
warming-up after the main switch is turned on. If not,
replace the lamp regulator.
3. Check if the CCD flat cable is firmly connected at
CN421 and CN404 on the SBU and scanner IPU
board.
4. Check the continuity of the flat cable.
5. Replace the scanner IPU board.
6. Replace the SBU unit.
24 February 1999
Type
D
D
D