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Troubleshooting
4-3 DCU Control
4-3-1 DCU Setup
DCU is used to diagnose the printer malfunctions. To use DCU, open and remove the Printer's exit cover in
front, and remove the bottom cover from left. Connect the DCU harness wire (10 pin-to-4 pin) to CN9 (4 pins)
on the control board.
4-3-2 Status Code
Connect the DCU to the printer and turn power on. The DCU display Status Code in the 7 segment LEDs.
There are two kinds of Status Codes; Normal and Error. And their codes mean the printer operating status.
NORMAL STATUS CODE
These codes mean paper location on the paper path when the printer is printing, or warming up.
61
Warm up
00~05
Ready(paper type)
20
Print Start
30
Feed Sensor On
40
Feed Sensor Off
50
Paper out
69
Sleep Mode
ERROR STATUS CODE
If the printer stops printing by any malfunction, the DCU displays its error status code.
60,62,68
Fuser Error
64
Cover Open
70
No Paper
71
Paper Jam 0
72
Paper Jam 1
73
Paper Jam 2
95
LSU Not Ready
4-2
The printer warms up when the printer is turned on or the cover is closed, or
wake from sleep mode.
The printer is in printable state. The paper type is sensed after
one page printing.
00: Legal , 01: Letter , 02: A4 , 03: EXEC , 04: B5 , 05: Folio
The code is displayed when engine controller is received 'PRINT' command
from the video controller.
It means that paper is passing the feed sensor.
It means that paper passed the feed sensor.
It means that paper passed the exit sensor.
It means that the printer fuser is turned off, and the power consumption is
minimized.
These codes mean the fuser error status. Heat lamp, thermistor, thermostat
open or thermistor short. The 'Low Temperature Error' is checked when the
printer is printing.
60: Open Fuser Error
62: Low Heat Error
68: Over Heat Error
The printer cover open or no toner cartridge in the machine.
The paper is not loaded in the printer paper tray.
Displays when the paper leading edge stops between the pick-up unit and
the feed sensor.
Displays when the paper leading edge stops between the feed sensor and
the exit sensor.
Displays when the paper leading edge stops after the exit sensor.
The LSU scanner motor is not ready or 'Hsync' signal is not output.
Samsung Electronics
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