Brother HL-5280DW - Main PCB Block Diagram

HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Confidential
2-3
2.2 Main PCB Block Diagram
Fig. 2-3 shows the block diagram of the main PCB.
SO-DIMM
SDRAM
HL-5240: 16MB
HL-5250DN/5270DN/
5280DW: 32MB
8MB
Internal: 16MB
HL-5250DN: 2MB
HL-5270DN/5280DW: 4MB
HL-5250DN: TCP/IP
HL-5270DN: Full Protocol
MAX 512MB
CDCC GA
IEEE 1284
SPD
D16/A13
CPU Core
ASIC
(Sapphire 266MHz)
CLK
INT
DATA
REQn
RSTn
USB2.0
2.0 High Speed
VBUS
D+/D-
Mask ROM Flash ROM
Network IC
(LAN9115)
LAN
25.00MHz
Xtal
48.00MHz
Xtal(for Sysclk/USB)
23.4617MHz
Xtal(for Video)
D16/A24
D16/A24
(Laser Diode PCB)
8 pin
CN (PANEL)
10 pin
CN (DXSOL)
2 pin
CN (TNRSEN)
2 pin
CN (RELAY FRONT)
9 pin
CN (RELAY REAR)
6 pin
CN (LT)
12 pin
CN (LVPS)
8 pin
CN (HVPS)
23 pin
CN (Laser Unit)
14 pin
CN (MAIN MOTOR)
19 pin
Motor
Driver IC
Reset IC
+3.3V
+3.3V
Pararell IF
5 LED/2 SW (HL-5240/5250DN)
LCD16x1 1LED 7SW (HL-5270DN/5280DW)
DX solenoid
GRIDC
Toner LED
5 PWM_out (HVPS)
3 solenoid (T1/REG/MP)
2 FAN (MAIN/HVPS)
5 sensor (reg_f/reg_r/pedg/T1PE/MPPE)
Therm1/2
HeaterON
AI3:7
AI1:2
ComparatorHTLIMITN
+24V
+8V +3.3V
+24VRET
0V
4 sensor (pedgex2/PEx2)
2 solenoid
Regulator
Regulator
5V 3.3V
3.3V 1.5V
+5V
SCAN_CTR/
MAIN_CTR/
MAIN_FR
CSROM1/ RD/WR CSROM0/ RD/WR
EXCS0/ RD/WR
EXCS1/ Rb/WR
INTn
RSTn
HL-5280DW
USB HOST
ISP 1362
Wireless
LAN
12.00MHz
Xtal
INTn
RSTn
2 sensor (PaperOut/DX tray)
3 sensor (Front_Cover/Toner sensor/Process NEW)
5 Analog_in (HVPS)
EEPROM
16kbit
CN
Fig. 2-3