Brother HL-1870N, Service Manual

Page: 298 / 303

APPENDIX
A-27
APPENDIX 19. NVRAM DEFAULT VALUE
The default values for the main items to be set in NVRAM are as follows;
Items Descriptions
Timing of Drum LED ON 16,000 page
(Counted from the drum unit life.)
Development switching
timing
The developing bias is switched from 400V to 300V when
5,000 pages are printed.
It is switched to 400V again when the toner cartridge is
replaced following the “TONER EMPTY” error message
(Counted from the number of the drum rotation in non-
continuous printing)
Fixing temperature •
Transparency: 170°C
•
Thin paper: 185°C
•
Plain paper: 208°C (195°C when printing using duplex
function)
•
Thick paper: 220°C
•
Thicker/Bond paper: 220°C (in non-continuous printing)
Smaller size mode See APPENDIX 16 ‘PRINT SPEEDS WITH VARIOUS
SETTINGS’ .