Samsung ProXpress 402 Series Service Manual page 31

Diagram of the M402xNX Series Electrical Circuit
3.3 V 3.3 V_ Cover_Open
Front Cover
Micro Switch
HVPS
Supply
DEV
THV
OPC
Va ristor
S
M
D
FUSER
BIAS DRUM
T
DEVELOPER Unit
SMPS
INLE T FUS E R
INLET
The main controller controls all modules required to print, that is, LSU, HVPS, SMPS, FAN, Fuser, etc.
The main controller receives print data from the host through network or USB Port. It takes this information and generates
printable video bitmap data. engine and video controller are not separated.
The main controller adopts the CHORUS4N(1GHz) CPU, A1500(600MHz), DIMM PBA on DDR3 memory to perform
printing jobs successfully.
The OPE Controller displays the status of the system using 4.3inch TFT LCD in response to user actions or the Main
controller.
The HVPS supplies high voltage for developing process. High Voltage controlled by PWM signal from CPU.
SMPS makes +5V and +24V DC from 220V or 110 AC.
Copyright© 1995-2016 SAMSUNG. All rights reserved.
24VS
1 24 VS
24 VS 12 3.3V
2 GND
GND 11
3 THV_R E AD
THV_R E AD 10
4 nTHV_ E N
nTHV_E N 9
5 P WM_ THV
P WM_THV 8
6 P WM_ DE V_DC
P WM_DE V_DC 7
7 P WM_ MHV
P WM_MHV 6
8 P WM_ FUS E R _B IAS
P WM_FUS E R_B IAS 5
9 GND
GND 4
10 GND
GND 3
11 3 . 3V
3 .3V 2
12 3 . 3V_C ove r_Ope n 1
3 .3V_C ov e r_Ope n 1
3 .3V_Cover_ Open 1
MHV F AN MAIN
1 GND(FB )
2 N. C
3 FAN_MAIN
1
GND
CRUM 2 S C L 1
3 S DA1
3.3V_C R UM
4
CRUM I / F PBA
N. C 6
N. C 5
Z-CRUM GND 4 1 GND
S C L 3
2 S C L 1
3 .3V_C R UM 2 3 3. 3V_C R UM
S DA 1 4 S DA
F AN 1 24VS
2
F AN _S MP S (F/ B)
S MP S
P AR ALLEL 1 5V
2 N. C
OP TION
3 GND
4 5V
1 24 VS 5
GND GND
4 CN 24 (2mm )
24 V OFF 2 24V OFF
THE RM
R e la y 3 3 R e la y _ AC _ ON
24VS
24 VS 4 2
Fus e r ON Fus e r ON
5 1
FUSER ON
1
5V_S MP S
5V_ S MP S 1
2 GND
GND 2
3 24V1
24 V1 3
4 GND
GND
4
24V 24V2
5
24 V2 5
5V_SMPS
The rmistor1
FUSER Unit
The rmoSta t
EEPROM
(32KB)
Se ria l Fla sh
A1500
(4MB)
DDR3
(128MB)
MAIN CLK
12MHz
RTC CLK
MAIN
32.7KHz
CN31(2mm)
CN 1 (1.5mm ) CN27( 2mm ) CN2( 1.5mm )
C N19 (2 mm )
Cover Open E XIT OUTBIN FULL
MAIN MOTOR MP
S E NS OR COVE R OP E N
S E NS OR
CL CL
CL
Cove r
Re gi
Pickup MP
MP Exit Pa pe r Cove r
Ope n
Clutch Clutch
Clutch Se nsor Se nsor Outbinfull Ope n
Se nsor
Se nsor
Ma in Motor
2. Product Specifications
OP E_LC D
4 .3inch Touch
LSU
OPE
(Dual Beam )
CN17 (FFC 1 mm)
CN16 (FFC 1 mm)
LS U_ IF OP E I/F (4 .3 inch TOUCH LCD)
EEPROM
(64KB)
DDR3
DIMM
(1GB)
5V_ S US P
nR S T_ S C F
S C F_ TXD
NAND FLASH
S C F_R XD
nS C F_OP R
(512MB)
C4N
25 MHz
25 MHz
Ne twork
RTL8211E
3 .3V_P S
VB US
DM
DP
GND
US B 2.0
USB HUB
CN6(2mm)
CN28( 2mm ) CN37 33CN16 CN15
CN32
AIR
SENSOR USB_IF USB_IF USB_IF
TE MP
SD CARD_IF
Ambie nt
Te mp
Se nsor
EMPTY REGI FEED
Direct WLAN EDI XOA :16GB
Se nsor Se nsor Se nsor
FALCON : 4GB
USB
SD CARD
1 N.C
2 OP T_ nC MDR E Q
3 N.C
24 V1 1
4 N.C
24 V1
2
5 GND
3 SCF
6 GND
DRAWER CN
4
7 GND
5
8 GND
6 9
GND
7 10 24 V
_R E Q
8 11 24 V
GND
9 12 24 V
GND
10 13 5 V
GND
14 5 V
15 5 V
MX0P 1
16 OP T_ nR E S E T
MX0N 2
MX1P 3 17 OP T_ R XD
18 OP T_ TXD
MX2P 4
MX2N 5
MX1N 6
MX3P 7
MX3N 8
GND 9
LE D1 10
LE D0 11
12
GND 13
GND 14
1
2
3
4
2-21