2. Product specifications and descriptions
2-27
Samsung Electronics
Service Manual
SCX-483x/5x3x series
2.2.5.1 Main controller
SCX-483xFD/HD Main Controller is composed with below components
-. CHORUS3 : To generate the printable video data and control engine
Embedded USB2.0 device
-. On board DDR2 SDRAM : system memory(128MB)
External DRR2 SO-DIMM : 256MB
-. Ethernet PHY : 10/100 Network printing
-. NOR Flash : 16MB for Program memory
-. Serial Flash: 8MB For Fax Data
The Main Controller manages an Electro-photography system, controls the Video Data of printing images
from Main Board to LSU, provides high-voltages and PWMs, adjusts temperature in the fusing system, reads
sensor signals and controls SCF option.
The Main controller also controls OPE and N/W PHY [Network], USB Device.
[ Main Controller Diagram ]
Power S/W
CPU: Chorus 3
Clock : 360Mhz
OPE 2line
Buzzer , Power S/ W
HVPS Board
(MHV,THV,DEV_DC
,FUSER_BIAS)
LSU
2BEAM
SCF
(Rst,Rx,Tx,REQ)
540?
UART x 4
USB 2.0
MAC
I2C x 2
DDR2 128 M
O
256 MB
1 DIMM
NCRUM
PHY IC
AC201A1KMLG
10/ 100
LAN
USB Device
ADF Unit
Modem
Conexant
ISP1582
EEPROM(64 K)
LSU
controller
DDR2
controller
SCAN
IF / AFE
GPIO
PWM x 12
DAC
ADC
RTC
RTC
battery
Flash (16M)
for OS
Engine (TBD)
- Solenoid ?
(MP, Pickup , Regi)
- Sensor ?
(Exit, Feed, Empty ,
Regi, Out bin full , MP,
ADF_DET, ADF_POS,
ADF_COVER, Duplex)
- Fan (Main,
SMPS, MIDDLE)
Motor
Cover S/ W
Debug
MAINBOARD
Fuser
thermistor
1 BLDC
STEP
A3983
Serial Flash (8M)
for FAX
Flash
DCDC
ST1S10
THV read
LD power
SPI
CIS Scan Unit
USB HOST
DCDC
ST1S10
DCDC
ST1S10
3. 3V
system
1. 8V
DDR
1.0V
CHORUS 3
SMPS(TYPE2)
24V, 5V, FDB, Relay
Speaker
LAFE1001
Rainier 31
Block Diagram
2010 .007 .12
Ambient
5V
S MP S
UR5596
0.9V
VTT
H/ W
PROTECT
Home
Sensor
STEP
A3983