Service manual

Chapter 5
5-3
F-5-2
5.2 Various Controls
5.2.1 Controlling the Laser Activation Timing
5.2.1.1 Laser Emission ON/OFF Control
0010-7720
iR2016 / iR2020 / iR2016i / iR2020i
The purpose of this control is to turn ON/OFF the laser diode (LD) in response to video signals.
The DC controller PCB sends laser control signals (CNTRL0, CNTRL1, and CNTRL2), which are used to switch between laser driver operation modes, to the laser
driver IC along with video signals (VDO1, /VDO1, VDO2, and /VDO2). The laser driver IC controls laser emission (ON/OFF) according to the combination of
CNTRL0, CNTRL1, and CNTRL2 signals.
The following table shows combinations of laser control signals (CNTRL0, CNTRL1, and CNTRL2).
T-5-4
5.2.1.2 Laser Emission ON/OFF Control
0011-2155
iR2016J /
The purpose of this control is to turn ON/OFF the laser diode (LD) in response to video signals.
The DC controller PCB sends laser control signals (CNTRL0, CNTRL1, and CNTRL2), which are used to switch between laser driver operation modes, to the laser
driver IC along with video signals (VDO1, /VDO1). The laser driver IC controls laser emission (ON/OFF) according to the combination of CNTRL0, CNTRL1,
and CNTRL2 signals.
The following table shows combinations of laser control signals (CNTRL0, CNTRL1, and CNTRL2).
Laser control signal Laser status Description
CTL2 CTL1 CTL0 Laser A Laser B
0 0 0 OFF OFF Laser control OFF
111
Video signal input
enable
Laser beams can be emitted in
response to video signals.
110ON OFF
Forced emission of laser A (for
adjustment in factory)
101OFF ON
Forced emission of laser B (for
adjustment in factory)
100ON ON
Forced emission of laser A and
laser B (for adjustment in
factory)
0 1 0 ON OFF APC over laser A
0 0 1 OFF ON APC over laser B
0 1 1 OFF OFF Forced stop of laser emission
[4]
Image Processor
PCB
DC Controller PCB
J314 J207
J206 J205
IC5
[2]
[3]
[1]