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4-3-3 Diagnostic Mode
When the printer malfunction occurs and DCU displays Error Status Code, you can use the Diagnostic Mode to
find a problem and fix it.
DIAGNOSTIC CODE
When you fix the malfunction, you can make only a unit of machine operated in Diagnostic mode. To enter
Diagnostic mode, push three buttons ( [DOWN], [SHIFT], [STOP] ) simultaneously and turn the printer power
on. When the DCU displays '78', release the keys in 2-3 seconds, then the DCU displays '00'. By using [UP] or
[SHIFT] and [DOWN] keys, select the desired Diagnostic Code, and push the [ENTER] key to perform the
operation. To stop its operation, push the [SHIFT] and [ENTER] buttons.
00
MAIN MOTOR OPERATING SYSTEM
Only main motor turns continuously.
01
MAIN HIGH VOLTAGE ON (THV)
There is output of -1550V to MHV terminal.
02
TRANSFER HIGH VOLTAGE (-) ON (THV - )
There is output of -1300V to THV terminal.
03
TRANSFER HIGH VOLTAGE (+) REFERENCE ON (THV + )
There is output of +1300V to THV terminal.
04
DEV/SUPPLY HIGH VOLTAGE
There is output DEV and SUPPLY high voltage to each HV terminals. At this time, the left one of
three LEDs (Diagnostic Mode Indicator) in the DCU lights, and DEV HV is -630V. To change this
voltage, push the [UP] button, and two (center and right) of three LEDs light, there are output
-530V to DEV HV terminal.
05
LSU OPERATING SYSTEM
The scanning motor in LSU turns and the right one of three LEDs lights. To check the LD (Laser
Diode) in the LSU at this state, push the [UP] button, the LD is driven, and the center LED lights. If
the LD is normal, all three LEDs light.
06
PICKUP CLUTCH ON
The solenoid in machine operate. To release the solenoid, push the [SHIFT] and [ENTER] buttons.
07
PEMPTY/PWIDTH/NEW CRU SENSOR TEST
When you make the actuator of PEMPTY/PWIDTH sensor operate, the left or right one of three
LEDs lights. If you set new CRU in the machine in this mode, the right LED lights.
08
FEED & EXIT SENSOR TEST
The feed & exit sensor also can be tested by the same method of the code '06'.
Samsung Electronics
Troubleshooting
4-3
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