Samsung SCX-4720F - Main Pba

Summary of Product
Service Manual
4-11
Samsung Electronics
4.3 Main PBA
The Engine Board and Controller Board have been integrated into a single PBA. This consists of the CPU,
printer scanner and line control functions. The CPU functions as the bus controller, I/O handler, motor driver
and PC inter-face. The main board sends the Current Image Video data to the LSU and manages the
Electrophotographic printing process. Circuits on the PBA drive include the main motor (paper feed,
cartridge, fuser), clutch driver, pre-transfer lamp driver, heat-lamp driver, CCD driver, scan motor driver,
modem and fan driver.
The signals from the paper feed jam sensor and paper empty sensor are inputted to the main board from
the power supply PBA..
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1 IMAGE PROCESS OR(CIP4E) U10 11 MOTOR DRIVER(TEA3718S) U5 21
LIN E T RANSCEIVER
(74LVX161284) U36
2 PROCESSOR AS IC(S PGP m) U35 12 MOTOR DRIVER(TEA3718S) U9 22 VEDIC X- TAL(19.6MHz) OSC3
3
FLASH MEMORY
CODE-HIGH(29LV160DB) U23
13 USB 2.0(NET2272) U50 23 CPU X- TAL(12MHz) OSC8
4
FLASH MEMORY
CODE-LOW(29LV160DB) U30
14 CMOS- LOGIC(74HCT273) U58 24
MODEM X- TAL(28.224MHz)
OSC6
5
FLASH MEMORY
PCL6- HIGH(29LV160DB) U24
15 CMOS- LOGIC(74HCT273) U59 25 USB HOS T X- TAL(6MHz) OSC9
6
FLASH MEMORY
PCL6- LOW(29LV160DB) U31
16 P ANAS ONIC(3V) BAT 2 26 PS3 DIMM CN10
7 SDRAM(K4S281632E) U45 17 VARTA(3.6V) BAT1 27 RAM DIMM CN12
8 SDRAM(K4S281632E) U46 18 FPGA(EX64-FTQ64) U44 28 JACK USB J1
9 MODEM(FM336) U62 19
A/D CONVERTER(AFE- CIP 4E)
U3
29 JACK DIN CN17
10 SRAM(K6R1016VID) U2 20 USB HOST(TDOTG242) U148 30
1 IMAGE PROCESS OR(CIP4E) U10 11 MOTOR DRIVER(TEA3718S) U5 21
LIN E T RANSCEIVER
(74LVX161284) U36
2 PROCESSOR AS IC(S PGP m) U35 12 MOTOR DRIVER(TEA3718S) U9 22 VEDIC X- TAL(19.6MHz) OSC3
3
FLASH MEMORY
CODE-HIGH(29LV160DB) U23
13 USB 2.0(NET2272) U50 23 CPU X- TAL(12MHz) OSC8
4
FLASH MEMORY
CODE-LOW(29LV160DB) U30
14 CMOS- LOGIC(74HCT273) U58 24
MODEM X- TAL(28.224MHz)
OSC6
5
FLASH MEMORY
PCL6- HIGH(29LV160DB) U24
15 CMOS- LOGIC(74HCT273) U59 25 USB HOS T X- TAL(6MHz) OSC9
6
FLASH MEMORY
PCL6- LOW(29LV160DB) U31
16 P ANAS ONIC(3V) BAT 2 26 PS3 DIMM CN10
7 SDRAM(K4S281632E) U45 17 VARTA(3.6V) BAT1 27 RAM DIMM CN12
8 SDRAM(K4S281632E) U46 18 FPGA(EX64-FTQ64) U44 28 JACK USB J1
9 MODEM(FM336) U62 19
A/D CONVERTER(AFE- CIP 4E)
U3
29 JACK DIN CN17
10 SRAM(K6R1016VID) U2 20 USB HOST(TDOTG242) U148 30