Contents
2.2.5.2.
OPE board ................................................................................................... 2 − 23
2.2.5.3.
Wireless LAN board (SCX—4729FW only) ....................................................... 2 − 24
2.2.5.4.
Fax board .................................................................................................... 2 − 24
2.2.5.5.
Joint PBA .................................................................................................... 2 − 25
2.2.5.6.
SMPS Board ................................................................................................ 2 − 26
2.2.5.7.
HVPS Board ................................................................................................ 2 − 28
2.2.5.8.
Electrical Parts Location ................................................................................. 2 − 29
2.2.6.
Engine F/W Control Algorithm ...................................................................................... 2 − 31
2.2.6.1.
Feeding ....................................................................................................... 2 − 31
2.2.6.2.
Transfer....................................................................................................... 2 − 31
2.2.6.3.
Fusing......................................................................................................... 2 − 32
2.2.6.4.
LSU............................................................................................................ 2 − 32
2.2.7.
Software Descriptions .................................................................................................. 2 − 33
2.2.7.1.
Software system overview .............................................................................. 2 − 33
2.2.7.2.
Architecture ................................................................................................. 2 − 33
2.2.7.3.
Data and Control Flow ................................................................................... 2 − 34
3.
Disassembly and Reassembly .............................................................................................................. 3 − 1
3.1.
Precautions when replacing parts ................................................................................................ 3 − 1
3.1.1.
Precautions when assembling and disassembling ............................................................... 3 − 1
3.1.2.
Preautions when handling PBA ...................................................................................... 3 − 1
3.1.3.
Releasing Plastic Latches .............................................................................................. 3 − 2
3.2.
Screws used in the printer.......................................................................................................... 3 − 3
3.3.
Replacing the Main SVC parts ................................................................................................... 3 − 4
3.3.1.
Cover ........................................................................................................................ 3 − 4
3.3.2.
OPE.......................................................................................................................... 3 − 5
3.3.3.
Scanner ..................................................................................................................... 3 − 6
3.3.4.
ADF ......................................................................................................................... 3 − 7
3.3.5.
ADF Roller ................................................................................................................ 3 − 7
3.3.6.
ADF Motor ................................................................................................................ 3 − 8
3.3.7.
Scan Motor ................................................................................................................ 3 − 9
3.3.8.
CIS Unit .................................................................................................................... 3 − 10
3.3.9.
Middle Cover ............................................................................................................. 3 − 11
3.3.10.
Fax Board .................................................................................................................. 3 − 12
3.3.11.
Main board................................................................................................................. 3 − 12
3.3.12.
SMPS board ............................................................................................................... 3 − 13
3.3.13.
HVPS board ............................................................................................................... 3 − 13
3.3.14.
Bin-Full sensor ........................................................................................................... 3 − 14
3.3.15.
Main Drive Unit .......................................................................................................... 3 − 14
3.3.16.
Pick up and Regi Clutch ............................................................................................... 3 − 15
3.3.17.
Pick up and Forward roller ............................................................................................ 3 − 16
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