How to use DCU, Cause and solution of Bad image

Troubleshooting

4-1 How to use DCU
4-1-1	DCU Setup	Page(4-2)
4-1-2 Code		Page(4-2)
4-1-3	Self Diagnostic Mode	Page(4-3)
4-1-4	Self Test Button	Page(4-4)
4-1-5 Paper Path Layout		Page(4-4)
4-1-6 DCU Panel		Page(4-5)
4-2 The cause and solution of Bad image
4-2-1	Vertical Black Line and Band	Page(4-6)
4-2-2	Vertical White Line	Page(4-6)
4-2-3	Horizontal Black Band	Page(4-7)
4-2-4	Black/White Spot	Page(4-7)
4-2-5	Light Image	Page(4-8)
4-2-6 Dark Image or a Black		Page(4-8)
4-2-7 Uneven Density		Page(4-9)
4-2-8 Background		Page(4-9)
4-2-9	Ghost (1)	Page(4-10)
4-2-10 Ghost (2)		Page(4-10)
4-2-11 Ghost (3)		Page(4-11)
4-2-12 Ghost (4)		Page(4-11)
4-2-13 Satins on the Face of Page		Page(4-11)
4-2-14 Satins on Back of Page		Page(4-12)
4-2-15 Blank Page Print out (1)		Page(4-12)
4-2-16 Blank Page Print out (2)		Page(4-12)

4-3 The cause and solution of the bad discharge

4-4-1 All LEDs blinking (Fuser Error)........Page(4-17)

4-4-2 All LEDs blinking (SCAN ERROR) .Page(4-17)

4-4-3	Not function of the gear of the fuser due to
	melting away	Page(4-18)
4-4-4 Paper Empty		Page(4-18)
4-4-5	Paper Empty without indication	Page(4-18)
4-4-6 Cover Open		Page(4-19)
4-4-7 No lamp on when the cover is open
	...........................................................	Page(4-19)
4-4-8	Defective motor operation	Page(4-20)
4-4-9	No Power	Page(4-20)
4-4-10 Vertical Line Getting Curved		Page(4-21)

4-5-1	Precautions on Safe-keeping of Toner Cartridge
	..........................................................Page(4-22)
4-5-2	Service for the Life of Toner Cartridge
	..........................................................Page(4-22)
4-5-3	Service for Judgement of Inferior Expendables
	and the Standard of Guarantee .....Page(4-22)
4-5-4	Signs and Measures at Poor toner cartridge
	..........................................................Page(4-23)

Samsung Electronics

4-1