Samsung ML-1440 User manual

SERVICE
LASER PRINTER
ML-1440
Manual
LASER PRINTER CONTENTS
1. Precautions
2. Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Parts List
6. Block Diagram
7. Connection Diagram

© Samsung Electronics Co.,Ltd. JUNE 2002
Printed in Korea.
VERSION NO. : 1.02 CODE : JC-0066A
This service manual is also provided on the web,
the ITSELF system f Samsung Electronics Co., Ltd.
“http://itself.sec.samsung.co.kr”

This manual is stated and
provided for service description.
All rights reserved. Any parts of the
information in this manual are prohibited
from free duplication, use or translation
without prior written approval except in
cases allowed by the Copyright Act.
Specifications are subject to change without
prior notice.
Copyright (c) 2002. 6.
Samsung Electronics Digital Printing CS Group

RepairManual
RepairManual
1. Block Diagram
2. Connection Diagram
3. Schematic Diagrams
CONTENTS
SAMSUNG LASER PRINTER
ML-1450Series
ML-1440

Electronics

Samsung Electronics Digital Printing
CS Group
Copyright (c) 2002. 1
This manual is made and
described centering around
circuit diagram
and circuit description needed
in the repair center
in the form of appendix.
SAMSUNG

1
1-1
Samsung Electronics
BLOCK DIAGRAM
Repair Manual
1. Block Diagram
OSC.
48 MHz
USB
INTERFACE IC
(USBN9602)
USB
INTERFACE
PARALLEL
INTERFACE
SPGPe
(KS32C61100)
OSC.
20MHz
POWER
ON RESET
PROGRAM ROM
(FLASHMEMORY)
512K*16b*2EA
FONT ROM
(MASK ROM)
512K*16b*2EA
DATA ROM
(DRAM)
1M*16b*2EA
SIMM
(Up to 64MB)
(Option)
Post Script 3
(Flash : 2MB
Font : 2MB)
(Option)
RAS CAS
MA MD
RCS RD WR
IOCS
PLL
Reset & W D T
Generation
ROM/SRAM/
FLASH ROM
Control
(4 Bank)
I/O
Control
(5 Bank)
Interrupt
Control
(4 External)
Timer
(3 CH)
Tone
Generator
Engine
Comm. I/F
RAM : 512B
GPIO
VIS
CPU Bus
Interface
Block
Systerm Bus
Interface
Block
[Arbiter]
EDO / FPM
DRAM
Control
(4Bank)
A/D Bus
CPU Addr BUS
CPU DATA BUS
Sys Addr BUS
Sys Data BUS
Sys Cntl BUS
ARM 7TDMI Cache 8KB
ADC
UART
(3CH)
JBIG
RAM
512B + 512B
OSC.(Video)
53.0109277MHz
/CS,/RD,/WR
NETWORK
INTERFACE
(Option)
SYSTEM DATA BUS SYSTEM ADDR. BUS CPU DATA BUS CPU ADDR. BUS
I / O
INTERFACE
74HC245*2EA
74LS273*3EA
THERM STOR
ADC INPUT
THV READ
ADC INPUT
[ COVER OPEN SWITCH ]
[ LASER DIODE ON/OFF SWITCH ]
SMPS
SUPPLY 5V to each ICS
24V
5V
24VS
SUPPLY 24V to
Motor/HVPS/FAN/LSUA
Laser Diode Vcc
on LSU
LRAM :1296B CXRAM :256B
PANEL INTERCACE
MOTOR CONTROL
NV RAM INTERCACE
SENSORS INPUT
SOLENOID CONTROL
FAN/PTL CONTROL
SCF INTERFACE
FUSER CONTROL
HVPS CONTROL
LSU INTERFACE
G E U
P V C
P P I
HPVC
HCT
D M A C
(2 CH)

2
2-1
Samsung Electronics
CONNECTION DIAGRAM
Repair Manual
2. Connection Diagram
SMPS
Controller
: Normal Connector
: Board on type Connector
Remark
Si ze /E mp ty /Fe ed/Ma nual Senso rs ar e on B©d
Solenoid
MP Tray
(Option)
1- 24VS
2- MP_CLUT CH
1- / MP_EMPT Y
2- GND_5
3- 5V
CN1
CN2
1- GND_5
2- GND_5
3- 5V
4- 5V
5- GND_24
6- GND_24
7- 24VS
8- 24VS
9- 24V
10- 24V
HVPS
MicroSwitchonBoard
In- 24V
Out- 24V S
CN1
CN14
PTL PT L Ct rl
5V CN3
CN2
1- 24VS
2- GND_24
3- 5V
4- GND_5V
5- THV_PWM
6- THVRD
7- /THV_EN
8- /MHV _PWM
9- /DEV_PWM
10- PTL
11- N.C.
12- N.C.
CN2
Thermistor
1- Ther m1
2- Ther m2
Therm1
Therm2
Joint type
CN12 1- Save
2- P_Nar row
3- Empty
4- Feed
5- FAN
6- Clutch
7- Fuser
8- MP_Clutch
9- MP_Empty
10- Motor _PA
11- Motor _PB
12- /Motor_PA
13- /Motor_PB
14- SCF_Cassete
15- SCF_Motor
16- SCF_Clutch
17- SCF_Empty
18- N.C.
19- T herm2
20- T herm1
21- 5V
22- EXT _Clo ck
23,24- 5V
25- 5VPS
26,27,28- GND_5V
CN8
CN3
Network I/F Card
(Option)
1- N.C,. 2- N.C., 3- 5V, 4- /IOCS3 , 5- D31, 6- D30,
7- D29, 8- GND5, 9- D28, 10- D27, 11- D26,
12- GND5,13- D25, 14- D24, 15- /EIRQ1, 16 - GND5,
17- A5, 18- A 4, 19- A3, 20- /EIRQ0,21- A2,22- D23,
23- D22, 24 - A17, 25- D21, 26- A16, 27- D20,
28- A15, 29- D19, 30- A14, 31- D18, 32- A13 ,
33- D17, 34 - A12, 35- D16, 36- A11, 37- A6,
38- A10, 39- /RESET , 4 0- A9, 4 1- /WAIT , 42 - A8,
43- /IOCS3, 44- A7, 45- /IOCS3, 46- N.C., 47- N.C.,
48- GND5, 49- A18, 50- /RD, 51- /WE, 52- GND5,
53- N.C., 54- N.C., 55- /EIRQ1, 56- GND5, 57- N.C.,
58- 5V, 59- 5V, 60- 5V (60pin Connector)
CN4
Micro- Switch
(For LSU 5VS Cut)
1-5V
2-5VS CN1 1
Panel B'd
LSU
1- 5V
2- GND_5
3- LED1
4- LED2
5- LED3
6- LED4
7- Key 1
8- Key 2
1- /HSYNC
2- 5VS
3- GND_5
4- /LD_ON
5- /VDO
6- LSUPOWE
R1 200
7- 24VS
8- GND_2 4
9- P_MOT OR
10- /LREADY
11- EXT_CLK
CN6
CN5
Exit
Sensor
1-5V
2-Exit_signal
3-GND_5 CN1 3
Motor
AC In- Let
110V for USA
220V for EU
Power Switch
SCF
(Option)
1- 5V
2- SCF_Sel Cassette
3- SCF_Motor
4- SCF_CL UTCH
5- SCF_Empty
6- 24VS
7,8- GND_5
1- Moto_PA
2- Motor _PB
3- /Motor_PB
4- Motor _PA
Heat Lamp (Fuser)
HOT
Neutral
HOT
Neutral
CN5
CN3
CN5 02
CN5 01
DC FAN
1- FAN Control
2- N.C.
3- 24V
CN5 03
1- 5V
2- RXD
3- TXD
4- GND- 5V
CN1 0
DCU
(For System Test)
Par allel Port
36 Pin
HOST
(PC)
36Pin
P1284 Con.
CN8
USB Port
4Pin 4Pin
USB Jack
CN7

3
3-1
Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
3. Schematic Diagrams
3-1 Main Circuit Diagram (1/6)

3-2
SCHEMATIC DIAGRAMS
Samsung Electronics
Repair Manual
Main Circuit Diagram (2/6)

3-3
Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
Main Circuit Diagram (3/6)

3-4
SCHEMATIC DIAGRAMS
Samsung Electronics
Repair Manual
Main Circuit Diagram (4/6)

3-5
Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
Main Circuit Diagram (5/6)

3-6
SCHEMATIC DIAGRAMS
Samsung Electronics
Repair Manual
Main Circuit Diagram (6/6)

3-7
Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
3-2 Engine Circuit Diagram (1/2)

3-8
SCHEMATIC DIAGRAMS
Samsung Electronics
Repair Manual
Engine Circuit Diagram (2/2)

3-9
Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
3-3 SMPS Circuit Diagram

Block Diagram
6-1
Samsung Electronics
6. Block Diagram
HVPS
74LVX161284
P1284 T ransceiver
XC61FN3112MR
Voltage Detector
ASIC
S3C46M0X01
29F800- 70
Flash Memory
512Kbit*16bit
K4S641632D- TC75
SDRAM
64Mbit
LD33C
3.3V Regulator
LD25C
2.5V Regulator
74ACT245
3state Transceiver
LC245
3state Transceiver
LCX273
Octal D- F/F
93C66
EEPROM- 5V
PACS1284
P1284 Netw ork
X- TAL
10MHz
OSC.
53.0109277MHz
FS781
Freq. Attn.
PC
USBIEEE1284
Controller
LSU
A2918SWV
Motor Driver
74HC4060
Ripple Counter
LM393
Comparator
Feed Sensor
Empty Sensor
Panel
SMPS
Inlet
Ass'y Power Cord
24V
5V
Main- Clutch
Heat Lamp
Narrow Sensor
SCF
FAN
Manual- Feed
Sensor
Thermistor
Motor
Exit
Sensor
Engine/SMPS

Block Diagram
6-1
Samsung Electronics
6. Block Diagram
HVPS
74LVX161284
P1284 T ransceiver
XC61FN3112MR
Voltage Detector
ASIC
S3C46M0X01
29F800- 70
Flash Memory
512Kbit*16bit
K4S641632D- TC75
SDRAM
64Mbit
LD33C
3.3V Regulator
LD25C
2.5V Regulator
74ACT245
3state Transceiver
LC245
3state Transceiver
LCX273
Octal D- F/F
93C66
EEPROM- 5V
PACS1284
P1284 Netw ork
X- TAL
10MHz
OSC.
53.0109277MHz
FS781
Freq. Attn.
PC
USBIEEE1284
Controller
LSU
A2918SWV
Motor Driver
74HC4060
Ripple Counter
LM393
Comparator
Feed Sensor
Empty Sensor
Panel
SMPS
Inlet
Ass'y Power Cord
24V
5V
Main- Clutch
Heat Lamp
Narrow Sensor
SCF
FAN
Manual- Feed
Sensor
Thermistor
Motor
Exit
Sensor
Engine/SMPS

Samsung Electronics 5-1
5. Exploded Views and Parts List
The material codes mentioned in themanual are subject to change without prior notice.
For the latest exact information, see ITSELF SYSTEM. (http://itself.sec.samsung.co.kr)
5-1 MainAssembly Exploded view ................................................................................................................ page(5-2)
5-2 TopAssembly Exploded view .................................................................................................................. page(5-4)
5-3 Frame Assembly Exploded view ............................................................................................................. page(5-6)
5-4 Exit Assembly Exploded view .................................................................................................................. page(5-9)
5-5 Fuser Assembly Exploded view ............................................................................................................. page(5-11)
5-6 Rack-MPF Assembly Exploded view .................................................................................................... page(5-13)
5-7 Drive Assembly Exploded view .............................................................................................................. page(5-15)
5-8 Pick-Up Assembly Exploded view ......................................................................................................... page(5-17)
5-9 Cassette Assembly Exploded view ....................................................................................................... page(5-19)