Samsung ML-2251N/XAA Service Manual page 61

6.1.3 Self Diagnostic Mode
If Error code is displayed use the Self Diagnostic Mode to assist in solving the problem. Only use the Self
Diagnostic mode for fault finding as many safety features are disabled.
To enter the Self Diagnostic mode connect the DCU and hold down the [Down], [Shift] and [Stop] at the same time.
Whilst holding these buttons turn the printer power on.
Code 78 will appear in the display. Continue to hold the buttons for approximately 3 seconds until 00 appears then
release the buttons.
Use the [Up] or [Shift][Up] buttons to select the required test. To start the test press the [Enter] button. To stop the
test press the [Shift] and [Enter] buttons together.
Code
00 Main Motor Operating System
The main motor is tested.
01 Main High Voltage On (MHV-)
-1550 voltage output to MHV terminal.
Caution : High voltage probe should be used.
02 Transfer High Voltage (-) On (THV-)
-1200 voltage output by THV terminal.
Caution : High voltage probe should be used.
03 Transfer High Voltage (+) On (THV +)
+1300 voltage output to THV terminal.
Caution : High voltage probe should be used.
04 DEV/supply High Voltage : DEV/Supply High Voltage Test.
-430 voltage output to DEV terminal.
Caution : High voltage probe should be used.
05 LSU Operating System
The LSU scanning motor is started and the 'ON' LED is lit. When
LSU motor is ready the 3 rd LED is lit.
06 Pickup clutch on
The main cassette Solenoid is tested.
Samsung Electronics
Description
Alignment & Adjustments
Service Manual
6-3