Canon LBP-860 Service Manual page 46

CHAPTER 2
signal is called lhe UNBLANKING signal
(UBL) a n d i s p r o d u c e d b y t h e D C
controller. The UBL signal is sent to the
laser driver as the FORCIBLE LASER ON
signal (/LON) to cause it lo switch the laser
diode ON when the /LON signal is 'T'.
yl&ANKING stgnal n n n
Figure
Z- 11
2-9