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Samsung Electronics
SUMMARY OF PRODUCT
Service Manual
4.3 Main PBA(SPL Model)
The Engine Board and the Controller Board are in one united board, and it is consisted of CPU part and
print part in functional aspect. The CPU is functioned as the bus control, I/O handling, drivers, and PC inter-
face. The main board sends the Current Image dlml Video data to the LSU and manages the conduct of
Electrophotography for printing. It is consisted of the circuits of the motor (paper feed, pass)
driving, clutch driving, 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.
USB PORT
ASIC SDRAM
FLASH MEMORY
MOTOR Drive IC
BUFFER
VIDEO CLK
14.7456MHz
Main CLK
10MHz
CN5 U25U31U20 CN8 CN7
CN6
U13
CN10
CN9
U27 U16 U26 U32 U24 CN3
OSC1
U33
OSC2
U17
CN2
CN1