Samsung ML-4550 - Page 176

Connection Diagram
Service Manual
9-1
Samsung Electronics
9
9
9. Connection Diagram
2 PWM_DEV_AC 1 1 24VS
1 24V 2 2 24VS
4 PWM_DEV_Vpp 3 3 DGND
3 24V 4 4 DGND
6 DEV_AC_CON 5 5 DGND
5 24V 6 6 5V
8 PWM_DEV_DC 7 7 nMAIN_MOT_ON
7 24VS 8 8 MAIN_MOT_READY
10 PWM_FUSER_BIAS 9 9 MAIN_MOT_CLK
9 24VS 10
12 PWM_MHV 11
11 VCC 12 1 DGND 2
14 HVPS_PSAVE 13 2 LSU_5VS 1
13 PWM_THV 14 3 LD_POWER2 4
16 GND 15 4 LD_POWER1 3
15 VCC 16 5 VDO1_minus 6
18 THV_READ 17 6 VDO1_plus 5
17 VCC 18 7 VDO2_minus 8
20 nTHV_EN 19 8 VDO2_plus 7
19 GND 20 9 nLD_EN 10
22 FUSER_ON 21 10 nSH1 9
21 GND 22 11 nHSYNC_plus 12
24 Fuser_Cover 23 12 nSH2 11
23 GND 24 13 LSU_CLK 14
26 MHV_READ 25 14 nHSYNC_minus 13
25 GND 26 15 nLREADY 16
28 GND 27 16 nLSU_MOT_ON 15
27 GND 28 17 DGND 18
18 24VS 17
VCC 1
PTL_ON 2
56~60 5V
55 3.3V
2 24V 1 53 SDA
1 FAN_MAIN_FEEDB
A 2 52 SCL
4 FAN_MAIN 3 51,54 DGND
3 FAN_SMPS_FEEDB
A
450N.C
6 FAN_SMPS 5 32~49 DGND
5 P_FEED 6 31 N.C
8 3.3V 7 15~30 DATA
7 GND 8 12~14 ADDR
10 OUTBIN_FULL 9 11 nHDD_CS0
9 EEPRIM_SDA 10 10 nHDD_CS1
12 VCC 11 9 N.C
11 EEPROM_SCL 12 8 nHDD_IORDY
14 P_MARGIN 13 7 N.C
13 GND 14 6 3.3V
16 P_REGI 15 5 nWR
15 P_SIZE1 16 4 nRD
18 P_EMPTY 17 3 nINT_HDD
17 P_SIZE2 18 2 3.3V
20 P_SIZE3 19 1 nRSTOUT
20
24VS 1
MAIN_CLUTCH 2 1 Therm_IN
MP_CLUTCH 3 2 GND
REGI_CLUTCH 4 3 Fuser_ON
MP_EMPTY 5
3.3V 6
CASSETTE_DETEC
T
7 1 24VS
DGND 8 2 DGND
Temp1 9 3 nDEV_MOT_RDY
4 DEV_MOT_CLK
5V 1 5 nDEV_MOT_ON
3.3V 2 6 DEV_MOT_DIR
PANEL_TXD 3 7 N.C
PANEL_RXD 4
nRSTOUT 5 1 DGND
DGND 6 2 3.3V
3 P_EXIT
3.3V 1 1 24VS
TDO 2 2 GND
nTRST 3
TCK 4
TMS 5 1 3.3V
TDI 6 2 DEBUG_RXD
nRESET 7 3 DEBUG_TXD
GND 8 4 DGND
24V 1
3.3V 2 24V
3.3V 3 24VS
Duplex_RXD 4 N.C
nDuplex_Detect 5 LSU_SAVE
Duplex_TXD 6 VCC
GND 7~8 LSU_5V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
8
9
1~2
3~4
5,7
6
24V 24V 24V VCC VCC VCC nSCF_RESET SCF_TXD SCF_RXD nSCF_BUSY nSCF_CMD_REQ SCF_IF SCF_PSAVE DUPLEX_DETECT DUPLEX_TXD DGND DGND DGND