Oce 3121 Technical & Service Manual page 663

Inputs to the Tray control PBA (4/4)
Control panel PCB
Staple Ready indicator
Add Staple indicator
Manual Staple key
(light-emitting unit)
Bin paper sensor
(light-receiving unit)
ed.1
J9-4
-5
-6
-7
J4-1
-2
LED1
PT1
-3
-4
Tray controller PCB
5V
SPLOK*
STEMP*
5V
MNSPL*
5V
LED; remains ON at all times.
BPDN* When paper exists in the bin, '0'.
* : Negative logic.
When '0', the LED turns ON.
When '0', the LED turns ON.
When the Staple key is
pressed, '0'.
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