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Fault Code COF37

Hi I have got a Minolta CF2001 and each time I start up it says to Phone my teck and give him the code COF37 Do you know what this is leading to. Cheers Craig

Posted by Craig Perryman on

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  • 31 Answers

COF37 is a code for ATDC high black density failure. Several different things can cause this code & I assume it does not clear by turning the machine on & off.It may be a dirty sensor or may need a black developer change. Either way I would recommend contacting a tech as the process unit can be tricky to remove.

Posted on May 29, 2007

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COF37 error code

C0F37: Abnormally high toner density detected by Black ATDC Sensor
Toner density that is 4 % or more higher than the target level is detected ten consecutive times during a print1.gif cycle, ATVC, or image stabilization sequence.

The sensor for this error is in the black imaging unit not the toner hopper. See the steps below. If that doesn't work then visit my website1.gif for contact and I will sell you a full service and or parts manual on CD.


Step
Check Item
Result
Action
1
Imaging Unit Bk is installed correctly.
NO
Check and correct ATDC



drawer CN of imaging unit Bk.
2
Each of Imaging Unit Bk contacts makes
NO
Clean or correct.

good contact.


3
ATDC Sensor harness is open-circuited.
YES
Change Imaging Unit Bk.
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1answer

Code cof37


C0F37: Abnormally high toner density detected by Black ATDC Sensor

Toner density that is 4 % or more higher than the target level is detected ten consecutive times during a print cycle, ATVC, or image stabilization sequence.

Step
Check Item
Result
Action
1
Imaging Unit Bk is installed correctly.
NO
Check and correct ATDC



drawer CN of imaging unit Bk.
2
Each of Imaging Unit Bk contacts makes
NO
Clean or correct.

good contact.


3
ATDC Sensor harness is open-circuited.
YES
Change Imaging Unit Bk.
0helpful
1answer

Minolta cf 2001

C0F37: Abnormally high toner density detected by Black ATDC Sensor
Toner density that is 4 % or more higher than the target level is detected ten consecutive times during a print cycle, ATVC, or image stabilization sequence.

The sensor for this error is in the black imaging unit not the toner hopper. See the steps below. If that doesn't work then visit my website for contact and I will sell you a full service and or parts manual on CD.


Step
Check Item
Result
Action
1
Imaging Unit Bk is installed correctly.
NO
Check and correct ATDC



drawer CN of imaging unit Bk.
2
Each of Imaging Unit Bk contacts makes
NO
Clean or correct.

good contact.


3
ATDC Sensor harness is open-circuited.
YES
Change Imaging Unit Bk.
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MINOLTA CF2001

You need to change the EEPROM for the Black toner.

Look at the link
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That error code indicates a fuser problem. Most likely the heater lamp or thermistor is faulty. In either case it is definitely a job for a tech. Sorry John
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