Brother HL-2400C Series, Service Manual

Page: 310 / 658

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5. HOW TO RE-ENTER ORIGINAL DATA TO THE MCTL PCB
CAUTION
Actions 1) and 2) MUST be carried out BEFORE the MCTL PCB is removed or the
NVRAM initialized otherwise ALL READINGS WILL BE LOST.
1) Go into the Engine Controller Mode. (Refer to Section 3 “ENGINE CONTROLLER
MODE” of Chapter V.)
2) Before initializing the NV-RAM or replacing the MCTL PCB, record the following
values;
i) Display TOTAL PAGE to record the value.
(i.e.) TOTAL PAGE (T) = 412P
ii) Display EACH IMAGE to record the values.
(i.e.) EACH IMAGE (IY)=348P
(IM)=353P
(IC)=365P
(IK)=439P
iii) Display NEXT CARE to record the values.
(i.e.) FC ROLL (NC2) = 12,050P
BL UNIT (NC7) = 49,135P
FU UNIT (NC8) = 39,684P
120K KIT (NC9) = 120,000P
iv) Display LIFE PERIOD SET of FACTORY MODE to record the values.
(i.e.) FC ROLL (LP2) = 12,000P
BL UNIT (LP7) = 50,000P
FU UNIT (LP8) = 60,100P
120K KIT (LP9) = 120,000P
3) When you have recorded all the values above, initialize the data in the NV-RAM on
the MCTL PCB or replace the MCTL PCB.
After initializing all the data in the NV-RAM on the MCTL PCB, or replacing the MCTL
PCB, all the original counter values for the cleaning roller, OPC belt cartridge, fusing unit,
and 120K 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:-
TOTAL PAGE = NEXT CARE - LIFE PERIOD
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.