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Troubleshooting
09
COVER OPEN SENSOR TEST
Same method of the code '06'.
10
FUSER TEST
When you push the [ENTER] button, the right LED lights, and the fuser temperature raises to
Ready. If you push the [UP] button, the center LED lights, and it raises to printing temperature.
When you push the [UP] button once more, the left LED lights, and it raises overheating tempera-
ture.
11
HOT BURN TEST
When you push the [ENTER] button in this code, the machine prints endlessly without any sensing
operation. To stop this operation, turn the printer power off.
12
CLEANING MODE PRINT MODE
The machine prints one page to clean the OPC drum in CRU.
13
THV (+) TRIGGER, ALL HV
There is all output of high voltages to each HV terminal, and the LSU/FAN operate.
In this mode, the engine controller senses electric resistance of the transfer roller, and output
transfer high voltage corresponding to it. If there isn't CRU in the machine, THV output is +199V ~
+2100V.
14
PTL TEST
This operation mean PTL LED status.
15
FAN TEST
This operation mean FAN status.
4-3-4 Self Test Button
When you push this button, the machine prints 'vertical line' pattern while it is pushed.
When you push this button and turn the Printer power on, the DCU displays code '89', and the Printer warms
up. After warmed up, it is in 'Ready' state, and code '88' is displayed in DCU. In this mode, the machine does
all printing operation (demo page printing and printing the data from PC) without all sensor operating. If you
diagnose the control board with malfunction printer engine, this mode is very useful.
4-4
Samsung Electronics
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