Samsung SCX-4216F Service Manual page 31

SUMMARY OF PRODUCT
4.3 Main PBA(SPL Model)
The Engine Board and the Controller Board are united on one board, and it is consists of a CPU part and
print part in a functional aspect. The CPU functions as the bus controller, I/O handling, drivers, and PC
inter-face. The main board sends the Current Image dlml Video data to the LSU and manages the
Electrophotography for printing. It consists of the circuits on the drive motor (paper feed, pass) , clutch dri-
ving, pre-transfer lamp driving, current driving, and fan driving.
The signals from the paper feed jam sensor and paper empty sensor are directly inputted to the main
board.
Including scan image processing, CCD drive signal creation, scan motor drive signal creation.
74LVX161284
SUPER1284
CN13
U41
U47
OSC3
U74
U75/
U95/
U123
Service Manual
4-10
SDRAM
ASIC
BUFFER
(INVERTER)
U11 U16
U41 CN14 OSC2
U10
CN10 CN8 CN7 CN9
U125
U115 U135
FLASH
MODEM
MEMORY
EXPANSION I/O MODEM CLOCK
(HCT273)
U63 U64 U15
U58
U9
CN4
U118 U113/U114
OSC5
U134
MOTOR DIRVE IC
U44/
U69
U43/
U68
U48
CN1
CN2
CN12
CN3
CN5
U68 CN6 U120
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