Samsung ML-2851ND - Engine H;W Specifications

Service Manual
Product spec and feature
2-17
Samsung Electronics
2.2.3 Engine H/W Specifications
2.2.3.1 Main Board
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 interface. The main board
sends the Current Image of 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.
SDRA
M
U6, U7
SDRA
M
U6, U7
ASIC
U8
ASIC
U8
USB
Port &
IC
USB
Port &
IC
Network
Interface & IC
Network
Interface & IC
DC to DC
Converter
(3.3V) U15
DC to DC
Converter
(3.3V) U15
DC to DC
Converter
(1.3V) U5
DC to DC
Converter
(1.3V) U5
NOR Flash
U17, U18
NOR Flash
U17, U18
EEPRO
M
U3, U4
EEPRO
M
U3, U4
SMPS CN10
( 24V : 4 6 8 10
5V : 12 14 16 )
SMPS CN10
( 24V : 4 6 8 10
5V : 12 14 16 )
HVPS CN4
( 24V : 13 14
24VS : 9 10 )
HVPS CN4
( 24V : 13 14
24VS : 9 10 )