Samsung SF-530 Series, Service Manual

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Troubleshooting
4-10 Samsung Electronics
When you replace the main board to new one, the informa-
tion on the toner state is cleared. Therefore, you should
update the information to the new board by entering the
exact value of total toner count and specifying the toner car-
tridge installed currently is shipped with the machine or new.
If not, ‘TONER LOW/EMPTY’ message may not appear
when the toner is run out.
1. In Tech mode, print ‘SYSTEM DATA LIST’. The list
includes the total toner count and CRU state information.
• TOTAL TONER COUNT: The total number of the dots
used to print up to current time.
• CRU STATE: The page number which the toner car-
tridge can print. (The yield of a new toner cartridge is
approximately 2,500 pages and that of the cartridge
supplied with the machine is approximately 1.000
pages.)
2. Replace Main board.
3. In Tech mode,
3-1) Press Setup, and find ‘MAINTENANCE’ by pressing
repeatedly or , then press Start/Enter.
3-2) When ‘TONER COUNT’ is displayed in LCD, press
Start/Enter, and enter the value of the total toner
count in the system data list.
3-3) When you are prompted to enter CRU STATE, press
Start/Enter.
3-4) When you see ‘[1.1000 2.2300]’ in LCD, select the
value of the CRU state in the system data list.
4. In Tech mode, print ‘SYSTEM DATA LIST’ and make sure
that the toner information is updated.
4-4 Print Quality
4-5 Note for replacing Main board
No Roller Abnormal image period Kind of abnormal image
1 OPC Drum 75.4mm •White spot on black image
•Black spot
2 Charge Roller 37.7mm Black spot
3 Supply Roller 26.8mm Horizontal density band
4 Develope Roller 31.6mm Horizontal density band
5 Transfer Roller 47.1mm Black side contamination/transfer fault
6 Heat Roller 50.1mm Black spot, White spot
7 Pressure Roller 50.2mm Black side contamination