Oce 3121 Technical & Service Manual page 732

Image processor PBA (1/3): inputs and outputs.
Analog
processor
PCB
DC
controller
PCB
Beam
detection (BD)
PCB
Laser driver
PCB
Power supply
indicator LED
Power saving
mode switch
Control Card V
(option)
506 TSM Océ 3121
J1001
J111
J5041
-1
-2
-3
J603
J602
J91
J183
Image processor PCB
J512
Checks are not meant for the field.
J509
Checks are not meant for the field.
5V
J504
-1
-2
BD (input)
-3
J518
J519
See p. 3-54
LEDON
When '1', LED turns ON.
(Turns ON when the main
power switch is ON.)
5V
J560
-3
-2
-3
-4
Functional description