Canon NP6012F Service Manual page 42

IOPERATIONS AND TIMING
2. Inputs to the DC Controller (2/2)
/*y
DC controller PCB
/
AE sensor Intensity
PCB sensor
PCB
Control
panel
Jii'
r\
I/
I
1 J301
I I
00
SW409
,-
Main switch
JIOZ-:
p
Drum cartridge
:
I:
PGP
PCB
(model with drum unit
replacement automatic
indicator function only)
Toner level Composite
detection power supply
PCB PCB
3-4
COPYAIGHT 0 1995 CANONINC.
>
Q4V
_t
4EREF
4E
=LEXP
ns
3lG1
iEAT
IGI
z$tT'
iEAT
rNMONl
when reflected light increases, voltage lowers.
when light from fluorescent lamp increases,
voltage lowers.
Keys and LEDs are wired in a matrix on the control
panel PCB; the DC controller reads the key inputs
and turns on or flashes the LEDs.
Combinations of 3-bit signals are used to correct
the variations in the resistance of the fixing heater
in 7 settings.
-
when toner level drops, '0'.
Figure 3-l 04
CANON NP6012/NP6OlZF/NP6212 REV.1 SEPb1995 PAlNTEDINll.4PAN(IMPAIMiAUJAPON)