Samsung ML-1200 Series Operating instructions
Repair Manual
Repair Manual
1. Block Diagram
2. Connection Diagram
3. Schematic Diagrams
CONTENTS
LASER PRINTER
ML-1200 Series
1
1-1
Samsung Electronics
BLOCK DIAGRAM
Repair Manual
1. Block Diagram
1.1 GDI Block Diagram(ML-1210/ML-1220M)
MAIN
S3C46M0X
SDRAM
(8MB)
SMPS
Eng ine
PANEL
B' D
FLASH
MEMORY
(0.5MB)
POWER
CORD
+24V
MOTOR
FAN
EXI T
SENSOR
HVPS
B' D
MHV
OPC GND
SUPPLY
DEV
TH V
BUFFER
MHVPWM
BI ASPW M
THVPWM
POWER
SWITCH
IN-LET
LED
4
3KEY
IEEE 1284 CABLE
VOLTAGE
DETECTOR
Crystal
10MHz
Mai n
Clock
Oscillator
44 MHz
Video
Clock
Power
On
Res et
CPU
Jupiter3
USB 74LVX161284
Line
Transcei ver
PC
+5V
FS781BZB
SOLENOIDE
DEV_FUSE
LSU
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1-2
BLOCK DIAGRAM
Samsung Electronics
Repair Manual
MAIN
S
Option
Up to
68MB
DRAM
(4
(2MB)
MB)
LSU
Eng i ne
PANEL
B' D
FLASH
MEMORY
POWER
CORD
+24V
MOTOR
SOLENOID
FAN
EXIT
SENSOR
HVPS
B' D
MHV
OPC GND
SUPPLY
DEV
THV
MHVPWM
BI ASPW M
THVPWM
POWER
SWITCH
LED
4
3KEY
IEEE 1284 CABLE
Oscillator
48 MHz
USB
PC
DEV_FUSE
+5V
IN-LET
SMPS
C P U
S3C46C0X01
74HCT273
74ACT273
Devided by
74HC406ON
Crystal
6.7149 MHz
USB Driver
USBN9602-28M
Power
On
Reset
Main
Clock
Video
Clock
VOLTAGE
DETECTOR
Oscillator
20 MHz
Oscillator
44 MHz
1.2 PCL Block Diagram(ML-1250)
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2
2-1
Samsung Electronics
CONNECTION DIAGRAM
Repair Manual
2. Connection Diagram
2.1 GDI Connection Diagram(ML-1210/ML-1220M)
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
1
2
3
4
5
6
+24V_T
+24VGND
*PMOTOR
+3. 3V
EXT_CLK
*HSYNC
+5V
+5V GND
*LD_ON
VDO
+5V GND
LSU
POLYGON
MOTOR
LD DIODE
+5V
+5V GND
LED_ERROR
LED_PAPER
LED_DATA
LED_TONER
*KEY_TONER
*KEY_CANCEL
*KEY_DEMO
1
2
3
4
5
6
7
8
9
LED
DISPLAY
PANEL
1
2
3
4
5
6
7
8
9
1
2
+5V
PTL PTL LED ARRAY
1
2
+24V_T
+24V GND
THVPWM
*THV_EA
THVRE AD
*MHVPWM
BI ASPW M
+5V
+5V GND
1
2
3
4
5
6
7
8
9
HVPS
1
2
3
4
5
6
7
8
9
THERM_A
THERM_B
1
21
2
THERMI STOR
+24V
+24VS
1
2
3
1
2
3
COVER
SWITCH
+5V
*PEMPTY 1
2
3
4
1
2
3
4*FEED
+5V GND
SENSOR
BOARD
36
PI N
HOST
COMPUTER
IEEE1284
COMPATI ABLE
CABLE J1 CN9
CN7
CN11
CN12
CN13
CN6
CN8
CN5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SMPS
+5V GND
+5V
+5V GND
+5V
+5V GND
+5V
+24V GND
+24V
+24VS
+24V GND
+24V
+24V GND
+24V
EXIT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
FUSER ON
17
18
19
20
21
22
23
24
ENGINE
+24VS
FAN
DEV_FUSE
*NEW_DEVE
*EGMOT _A1
EGMOT_PHA
*EGMOT_B1
EGMOT_PHB
4PI N
CONN-
ECTO R
for
USB
USB CABLE
CN3
DCU CN1
+5V
DCU_DATA 1
2
3
4
1
2
3
4DCU_CLK
+5V GND
Not Used
ENGINE+ SMPS
B
Unification
'd
CLUTCH
SOL E-
NOID
CN1
DEV_FUSE
CN3
CN4
FAN
FUSER
CN502
STEP-
PING
M
O
TOR
CN2
CN5
GDI
Main
Board
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2-2
CONNECTION DIAGRAM
Samsung Electronics
Repair Manual
1
2
3
4
5
6
7
8
9
10
11
+24V_SLEEP
+24VGND
*P
LREADY*
MOTOR
EXT_CLK
*HSYNC
+5V
+5V GND
*LD_ON
VDO
+5V GND
LSU
POLYGON
MOTOR
LD DIODE
+5V
+5V GND
KEY_TONER*
KEY_CANCEL*
KEY_DEMO*
1
2
3
4
5
6
7
8
9
LED
DISPLAY
PANEL
1
2
3
4
5
6
7
8
9
+5V
PTL
PTL LED ARRAY
1
2
+24V_SLEEP
+24V GND
THVPWM
*THV_EN
THVRE AD
*MHVPWM
BI ASPW M
+5V
+5V GND
HVPS
1
2
3
4
5
6
7
8
9
THERM_A
THERM_B
1
2
THERMI STOR
+24V
+24VS
1
2
3
COVER
SWITCH
+5V *PEMPTY
1
2
3
4
FEED_SENSOR*
+5V GND
SENSOR
BOARD
36
PI N
HOST
COMPUTER
IEEE1284
COMPATI ABLE
CABLE J1 CN12
CN6
CN8
CN11
CN5
CN4
CN2
CN3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SMPS
ENGINE
4PI N
CONN-
ECTO R
for
USB
USB CABLE
CN7
DCU CN9
+5V
DCU_DATA
1
2
3
4
1
2
3
4DCU_CLK
+5V GND
Not Used
ENGINE+ SMPS
B
Unification
'd
SOL E-
NOID
CN1
DEV_FUSE
CN3
CN4
FAN
FUSER
CN502
STEP-
PING
M
O
TOR
CN2
CN5
PCL
Main
Board
1
2
3
4
5
1
2
3
4
5
6
1
2
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
1
2
1
2
3
1
2
3
4
LED_ERROR
LED_PAPER
LED_DATA
LED_TONER
+5V GND
+5V
+5V GND
+5V
+5V GND
+5V
+24V GND
+24V
+24V GND
+24V
+24V GND
+24V
EXIT
+24VS
FUSER ON
+24VS
MOTOR B*
CLUTCH
MOTOR_PB
FAN
DEV_FUSE
MOTOR_A*
NEW_DVE*
MOTOR_PA
2-2 PCL Connection Diagram(ML-1250)
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3
3-1
Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
3. Schematic Diagrams
3.1 GDI Main Circuit Diagram (1/5)
- This Document can not be used without Samsung's authorization -
3-2
SCHEMATIC DIAGRAMS
Samsung Electronics
Repair Manual
Main Circuit Diagram (2/5)
- This Document can not be used without Samsung's authorization -
3-3
Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
Main Circuit Diagram (3/5)
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3-4
SCHEMATIC DIAGRAMS
Samsung Electronics
Repair Manual
Main Circuit Diagram (4/5)
- This Document can not be used without Samsung's authorization -
3-5
Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
Main Circuit Diagram (5/5)
- This Document can not be used without Samsung's authorization -
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