Konica Minolta bizhub PRO C5500 Solution Manual page 129

bizhub PRO C5500
at power up.
with poor copy quality, lines, wrinkles. The transfer belt may mis-track or slide toward one side or the other ("walking" off the rollers).
during color registration adjustment.
after performinga PM.
possibly with C-2714 error code. No image is visible on the transfer belt.
possibly with C-4501, C-4502, C-4503and/or C-4504 error codes.
possibly with C-4521 and/or C-4522 error codes.
Solution
At power up.
CAUSE: Ten (10) pixels of Color registration overlap is detected when comparing to a previous Color Registration adjustment.
SOLUTION: In order to reduce the error occurrence ratio, the following function was added to firmware version 60.
DIPSW 23-1
0 : SC detected condition 10 pixels (Default)
1 : SC detected condition 60 pixels
Notes :
1. To change SC detected condition only, color registration accuracy itself is not change.
2. The purpose of this DIPswitch is to reduce the occurrence ratio. Color registration problem itself cannot be improved.
3. Download and install firmware version 60 if necessary. The latest version firmware or system software is available via the Konica Minolta Download
Selector. Access the Selector from SSD Web Support (CS Expert Support) by clicking on 'Download MSDS, Drivers, Firmware and more'.
Poor copy quality, lines, wrinkles. The transfer belt may mis-track or slide toward one side or the other ("walking" off the rollers).
PROBABLE CAUSES:
1. Upper front bearing falling out of the holderbecause oflack of tension on the upper roller bearings.
Remove and reverse the upper front bearing (p/n 5400 7605 0 listed on page 32, Key 5 in the Parts Manual) so that the bearing flange is outward and/or
slightly re-form the holder in which it sits so that more pressure is applied to the bearing.
2. Tension roller in the Intermediate Transfer Assemblybecoming dislodged, permitting the transfer belt to "walk off" or the upper and lower tension rollers
are not lining up correctly.
Addition of a new spacer at each end of the tension roller prevents the roller from disengaging from the bracket. To accommodate the new spacer, the length
of the roller has been increased slightly and a "D" shape placed on the ends. Refer to attached Bulletin Number 6331 for additional detail. Also, adjusting the
lower tension roller is suggested. Please see the attached document for directions.
3. Gaps between Tension Plate Rear Caulking (p/n 65AA -273 0) and Plate/Rear (p/n 65AA 2625 0E) after maintenance performed on the transfer belt unit.
Set Tension Plate Rear Caulking properly so that no gap exists and firmly fix with screw. See attached files for more information.
Note :Also refer to attached Bulletin Number 6522 which addresses Transfer Belt Sliding.
During color registration adjustment.
CAUSE: Failed color registration sensor PS8 or PS9.
SOLUTION:SwapPS8 and/or PS9. Replace color registration assembly (p/n A03U R7B4 00)
After performinga PM.
CAUSE: The Color Registration adjustment was not performed (bizhub PRO C5500/C5501/C6500/C6501 ).
SOLUTION: Perform the Color Registration adjustment:
1.Enter Service Mode.
2.Select Machine Adjustment.
3.Select Printer Adjustment.
4.Select Color Registration Adjustment and then Start.
5.Exit Service mode.
Possibly with C-2714 error code. No image is visible on the transfer belt.
CAUSE: The first transfer pressure release motor (M19) coupling gear is spring loaded and can become lodged in the back position.
SOLUTION: Release the first transfer pressure release motor (p/n 08AA 8003 0) coupling gear (p/n 65AA 1714 0) so that it springs freely when pressed and
released.
Possibly with C-4501, C-4502, C-4503and/or C-4504 error codes.
PROBABLE CAUSES:
1. Open ICP fuse on the Printer Control Board (PRCB).
Check the continuity of the ICP fuses ICP17, ICP20, and ICP21 with the PRCB out of the machine. You can also carefully check that there is 24V DC on
each side of the fuses while the board is in the machine. Voltage on just one side of the fuse would indicate that the fuse is open and the board needs
replacing (p/n A03U R759 00 - Printer Control Unit).
Copyright , Konica Minolta Business Solutions U.S.A., Inc.
Warm-up, wrong display, incorrect operation, lock-up
129
March 2010