Brother HL-3450CN Service Manual page 339

APPENDIX
After initializing all the data in the NV-RAM on the MCTL PWB, or replacing the MCTL PW
B, all the original counter values for the cleaning roller, OPC belt cartridge, fusing unit, 120K
kit and 240K kit should be re-entered as below;
The method used to correct the counters is to reset the page counter to a calculated TOTAL
PAGE value and then to perform a CLEAR CARE for the item to reset the NEXT CARE for
that item to the value recorded in 2) iii).
The basic formula used in these calculations is:-
Where this formula would result in a negative number, the LIFE PERIOD should be
temporarily set to a lower value so that the result is a positive number and then this number
and LIFE PERIOD used to perform the CLEAR CARE to reset the NEXT CARE counter.
4) Re-enter the FC ROLL (NC2) value as follows;
i) Enter the value of NC2 - LP2 into the TOTAL PAGE counter.
ii) Perform CLEAR CARE 2. (Refer to '36 CLEAR CARE' in page V-24 of Chapter V.)
iii) Check that the value of NEXT CARE is reset to the recorded value in 2) iii).
5) Re-enter the BL UNIT (NC7) value as follows;
i) After calculating the values so that they work in the following formula
ii) Perform CLEAR CARE 7. (Refer to '36 CLEAR CARE' in page V-24 of Chapter V.)
iii) Check that the value of NEXT CARE is reset correctly.
iv) Reset the LIFE PERIOD counter in FACTORY MODE to 50,000.
TOTAL PAGE = NEXT CARE - LIFE PERIOD
Ÿ
(i.e.) NC2 - LP2 12,050P - 12,000P = 50
Enter the value '50' in the TOTAL PAGE counter.
(i.e.) NC2 = 12,050P
(IY + IM + IC + IK) = NC7 - LP7,
enter each value of LP7, IY, IM, IC, IK.
(i.e.) (IY + IM + IC + IK) = NC7 - LP7
Ÿ
(348 + 353 + 365 + 439) = 49,135 - 50,000
Since the above result is minus, reduce the value of LP7 is 40,000P in order to
make the result plus, then enter it into the LIFE PERIOD SET counter in
FACTORY MODE.
The formula is as follows;
(IY + IM + IC + IK) = NC7 - LP7
Ÿ
(348 + 353 + 365 + 439) = 49,135 - 40,000
Ÿ
(348 + 353 + 365 + 439) = 9,135
Change the value of IK from 439 to 8,069 so that the formula works out.
(348 + 353 + 365 + 8,069) = 9,135
Then, enter each value for IY=348, IM=353, IC=365, and IK=8,069 in the
EACH IMAGE SET counter in FACTORY MODE.
(i.e.) NC7 = 49,135P
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