Mita-Konica-Tech
10-12-2012, 01:15 AM
well I'm stumped on this one....
I responded to a tech assist call on a KM C6501 that was down due to C-4520 at boot up... the machine had been down for a week with multiple issues. Now it's my problem....! and now I have three days and 16 on site hours.....
Color 603253
Black 112884
Firmware -50
First issue:
1. C-4511 occurs intermittently and disables machine.
2. Replaced Printer Control Board
3. Replaced Yellow Write Unit (third time in two weeks).
4. Performed several machine adjustments, without effect.
Updated firmware to version 70
Performed recall standard data factory initial for printer and process adjustments
Got a 4520 at boot up
Ran test pattern and yellow was skewed
Installed original write unit in yellow slot - yellow was still skewed
Ran write initial position adjustment and coded with C-4511
Opened write unit and repositioned laser correction
When running "Writing Init. Pos. Memory = Unable to adjust Yellow....Error C-4511
Replaced Yellow and Magenta Write Units
Replaced Imaging Processing Board
Reinstalled Firmware
LD bias adjustment for Yellow and Magenta write units = No errors...
But when I run the Writing Init Pos. Memory I get error
Replaced the Yellow write unit again...
also swapped out a complete transfer belt assembally - same result
unable to perform color registration manual Adjustment Error 13 and 5
Auto Color Registration Yellow has a Skew of +49.0 Magenta and Cyan within norm.... This results in a C4501 Code
Replaced Printer Control Board again just in case it was damaged and to verify I'm not nuts...
Notes:
a. Writing Init Pos. Memory : when running this adjustment C, M, and K no errors..... Yellow Write unit starts knocking and crashes...
b. LD Bias Adjustment ..... Standard operating procedure is to run this adjustment after replacing write units.... This adjustment does not error out even though it should since the "Write Init Pos. Memory" errors out on the Yellow write unit....
c. I/O check mode was run to lock in the new write units "Position A and Position B" no error...
d. CD Skew Adjustment ..... Black is right on the money.....Since every thing is depended on black being in proper alignment....before you can run Color Reg on the CMY for Linearity of K
e. Restart Timing Adjustment...... On the Money
f. Color Registration Adjustment...... Throws a Code 4520
g. Color Registration/Manual (Adjustment)....... Can't perform because the Yellow is so skewed ...... Actual reading on Yellow is +45.0 ....Cyan Magenta and Black are all about the same 00.4
h. Auto Gamma Adjustment......no errors.....
i. Write unit ske adjustment - is centered for Yellow which be the problem but it doesn't solve my problem
I have attached a sample for your review..... this may be something simple I'm overlooking but at least today the machine is passing copy's....even though Yellow is off... One other note I also replaced the wiring harness from the Printer control board to the write units....I think the previous tech damaged it ... therefore the machine no longer crashes at boot.... Thanks for any thoughts on this issue:confused:....Brian
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I responded to a tech assist call on a KM C6501 that was down due to C-4520 at boot up... the machine had been down for a week with multiple issues. Now it's my problem....! and now I have three days and 16 on site hours.....
Color 603253
Black 112884
Firmware -50
First issue:
1. C-4511 occurs intermittently and disables machine.
2. Replaced Printer Control Board
3. Replaced Yellow Write Unit (third time in two weeks).
4. Performed several machine adjustments, without effect.
Updated firmware to version 70
Performed recall standard data factory initial for printer and process adjustments
Got a 4520 at boot up
Ran test pattern and yellow was skewed
Installed original write unit in yellow slot - yellow was still skewed
Ran write initial position adjustment and coded with C-4511
Opened write unit and repositioned laser correction
When running "Writing Init. Pos. Memory = Unable to adjust Yellow....Error C-4511
Replaced Yellow and Magenta Write Units
Replaced Imaging Processing Board
Reinstalled Firmware
LD bias adjustment for Yellow and Magenta write units = No errors...
But when I run the Writing Init Pos. Memory I get error
Replaced the Yellow write unit again...
also swapped out a complete transfer belt assembally - same result
unable to perform color registration manual Adjustment Error 13 and 5
Auto Color Registration Yellow has a Skew of +49.0 Magenta and Cyan within norm.... This results in a C4501 Code
Replaced Printer Control Board again just in case it was damaged and to verify I'm not nuts...
Notes:
a. Writing Init Pos. Memory : when running this adjustment C, M, and K no errors..... Yellow Write unit starts knocking and crashes...
b. LD Bias Adjustment ..... Standard operating procedure is to run this adjustment after replacing write units.... This adjustment does not error out even though it should since the "Write Init Pos. Memory" errors out on the Yellow write unit....
c. I/O check mode was run to lock in the new write units "Position A and Position B" no error...
d. CD Skew Adjustment ..... Black is right on the money.....Since every thing is depended on black being in proper alignment....before you can run Color Reg on the CMY for Linearity of K
e. Restart Timing Adjustment...... On the Money
f. Color Registration Adjustment...... Throws a Code 4520
g. Color Registration/Manual (Adjustment)....... Can't perform because the Yellow is so skewed ...... Actual reading on Yellow is +45.0 ....Cyan Magenta and Black are all about the same 00.4
h. Auto Gamma Adjustment......no errors.....
i. Write unit ske adjustment - is centered for Yellow which be the problem but it doesn't solve my problem
I have attached a sample for your review..... this may be something simple I'm overlooking but at least today the machine is passing copy's....even though Yellow is off... One other note I also replaced the wiring harness from the Printer control board to the write units....I think the previous tech damaged it ... therefore the machine no longer crashes at boot.... Thanks for any thoughts on this issue:confused:....Brian
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