User manual

95.08.23.11.29
Color LaserWriter 12/600 PS Basics & Theory 1–23
DC Controller Input/Output Signals
PWM mode-setting signal
"L" to drive the scanner motor.
J111-23
LLCNT
J102-10,-11
-8
/SCNON
J701-1,-2
-6
+24V
"L" when the scanner motor
is rotating normally.
Reference clock signal
-9
-6
-5,-7
/SCNRDY
SCNCLK
-4
-3
-5,-7
J102-4
-3
J451-1
+5V
-2
/BDI
-2
-3
"L" when the BD signal is input.
PDIN
Dv2 to Dv9
-22
/VDOENB
/LSON
NHD
SCK1
M1 to M8
-17
-9
-1,-3,-4,-5,
-6,-7,-13,15
-11
J110-7
-5
-11,-13,-15,-17,
-19,-21,-23,-25
"L" to switch ON the laser diode forcibly.
-9
LEDON
OILSNS
"H" when oil runs out.
WEBSNS
"H" when the cleaning belt has run out.
TOPREG
+5V
TNFUL
"H" when the waste toner is full.
"L" when video data can be written.
Clock signal
J105-13
-11
-12
J41F-1
-3
-2
J107-1
-3
-2
J631-3
-1
-2
J106-1
-3
-2
J61-3
-1
-2
J631-3
-1
-2
J106-6
-5
-4
Reset signal
LEDON
"L" when the power-saving mode is set.
"L" when the power-saving mode is set.
CSW3
CSW2
CSW1
/CSIZE3
/CSIZE2
/CSIZE1
J107-7
-6
-5
-4
J1601-1
-2
-3
-4
Laser/Scanner Assembly DC Controller Board
Voltage is input in proportion to the
laser power.
Analog signals are output to control
the laser power.
Video data signals
Beam-Detect
Board
Laser Diode
Laser
Control
Board
Scanner
Motor
Oil-Low Sensor
PS13
Cleaning Belt
Sensor
PS5
Transfer Drum
Top Sensor
PS8
Waste Toner
Sensor
PS12
"H" switched to "L" when the TOP
position of the transfer drum is detected.
"L" switched to "H" when the
registration position is detected.
The cassette size and the pulling
operation for the ejector are detected.
J312-1
-2
-3
-4
J1602-4
-3
-2
-1
SW1601
Cassette
Size-Sensing Switch
Ejection
Sensing Switch