Brother HL-3450CN Series, Service Manual

Page: 172 / 365

HL-3450CN SERVICE MANUAL
5-47
3.4.5 Initial setting of engine NVRAM
Implement the initial setting at the replacement of MCTL PWB after clearing the contents of
NVRAM.
<Purpose>
The number of images for each color will be reset when changing the MCTL PWB or
executing NVRAM INITIAL.
<Procedures of Setting>
(1) Before replacing the MCTL PWB, confirm the contents of the NVRAM for the
following items.
“Factory Mode”
Code Subject Confirmation Value
43 MARGIN ADJUST Top margin set value
43 MARGIN ADJUST Left margin set value
45 LP TUNE UP Adjustment value (“+4” in ordinary case)
45 THV TUNE UP Adjustment value (PPC/OHP “0”, LABEL “-2”)
45 DBV TUNE UP Adjustment value (“0” in ordinary case)
45 CBV TUNE UP Adjustment value (“0” in ordinary case) *1
45 FBV TUNE UP Adjustment value (“+1” in ordinary case) *2
45 ADC TUNE UP Adjustment value (“0” in ordinary case)
47 TOTAL PAGE SET Total print count
47 LFU PAGE SET Print count from LFU
47 DPL PAGE SET Print count from Duplex
48 EACH IMAGE SET Formed image count for 4 individual colors
49 NEXT LIFE SET Print count for maintenance replacement parts
(2) Execute 46 NVRAM INITIAL in Factory Mode.
(3) After implementing the NVRAM INITIAL, input the values obtained in procedure
1) into the NVRAM to complete the settings.
*1 ’0’ is applied for machines produced after June 2000. You need to set the CBV TUNE UP
value to ‘0’ for machines which were produced before June 2000, to which ‘+1’ has been
applied. For setting procedures, see 45-4. CBV TUNE UP in this section.
*2 ‘+1’ is applied for machines produced after June 2000. You need to set the FBV TUNE
UP value to ‘+1’ for machines which were produced before June, 2000, to which ‘0’ has been
applied. For setting procedures, see 45-5. FBV TUNE UP in this section.