ml-1200 repair manual
TRANSCRIPT
Repair ManualRepair Manual
1. Block Diagram
2. Connection Diagram
3. Schematic Diagrams
CONTENTS
LASER PRINTER
ML-1200 Series
1
1-1Samsung Electronics
BLOCK DIAGRAM
Repair Manual
1. Block Diagram
1.1 GDI Block Diagram(ML-1210/ML-1220M)
MA
IN
S3
C4
6M
0X
SD
RA
M(8
MB
)
SM
PS
Eng
ine
PA
NE
LB
'D
FLA
SH
ME
MO
RY
(0.5
MB
)
PO
WE
RC
OR
D+2
4V
MO
TOR
FAN
EXI
TS
EN
SO
R
HV
PS
B'
D
MH
V
OPC
GN
D
SU
PPL
Y
DEV
TH
V
BU
FF
ER
MH
VP
WM
BIAS
PWM
TH
VPW
M
PO
WE
RSW
IT
CH
IN
-LE
T
LE
D4 3
KE
Y
IEEE
1284
CABL
E
VO
LT
AG
ED
ET
EC
TO
R
Cry
sta
l10
MH
zM
ain
Clo
ck
Osc
illa
tor
44M
Hz
Vid
eoC
lock
Po
we
rO
nR
es
et
CP
UJu
pite
r3
US
B74
LVX1
6128
4L
ine
Tran
scei
ver
PC
+5V
FS78
1BZ
B
SO
LEN
OID
E
DE
V_F
US
E
LSU
1-2
BLOCK DIAGRAM
Samsung ElectronicsRepair Manual
MA
IN
S Opt
ion
Up
to68
MB
DR
AM
(4(2
MB
)
MB
)
LSU
Eng
ine
PA
NE
LB
'D
FLA
SH
ME
MO
RY
PO
WE
RC
OR
D+2
4V
MO
TOR
SO
LEN
OID
FAN
EXIT
SE
NS
OR
HV
PS
B'
D
MH
V
OPC
GN
D
SU
PPL
Y
DEV
TH
V
MH
VP
WM
BIAS
PWM
TH
VPW
M
PO
WE
RS
WIT
CH
LE
D4 3
KE
Y
IEEE
1284
CABL
E
Osc
illat
or48
MH
zU
SB
PC
DE
V_F
US
E
+5V
IN-L
ET
SM
PS
C P
US3
C46
C0X
0174
HC
T273
74AC
T273
Devid
ed b
y74
HC40
6ON
Crys
tal
6.71
49 M
Hz
US
B D
river
US
BN
9602
-28M
Pow
erO
nR
eset
Mai
nC
lock
Vid
eoC
lock
VO
LTA
GE
DE
TE
CTO
R
Osc
illat
or20
MH
z
Osc
illat
or44
MH
z
1.2 PCL Block Diagram(ML-1250)
2
2-1Samsung Electronics
CONNECTION DIAGRAM
Repair Manual
2. Connection Diagram
2.1 GDI Connection Diagram(ML-1210/ML-1220M)
1234567891011
12345123456
+24V_T+24V GND*PMOTOR+3. 3V
EXT_CLK* HSYNC+5V+5V GND* LD_ONVDO+5V GND
LSU
POLYGONMOTOR
LD DIODE
+5V+5V GNDLED_ERRORLED_PAPERLED_DATALED_TONER* KEY_TONER* KEY_CANCEL* KEY_DEMO
123456789
LED
DISPLAYPANEL
123456789
12
+5VPTL PTL LEDARRAY
12
+24V_T+24V GNDTHV PWM*THV_EATHVRE AD* M H VP WMBI ASPW M+5V+5V GND
123456789
HV PS
123456789
THERM_ATHERM_B
12
12THERMI STOR
+24V
+24VS
123
123
COVERSWITCH
+5V*PEMPTY
1234
1234
* FEED+5V GND
SENSORBOARD
36PI N
HOST
COMPUTER
IEEE1284COMPATI ABLE
CABLEJ1 CN9
CN7
CN11
CN12
CN13
CN6
CN8
CN5
12345678910111213141516
SMPS
+5V GND+5V+5V GND+5V+5V GND+5V
+24V GND+24V
+24VS
+24V GND+24V+24V GND+24V
EXIT
123456789101112131415161718192021222324
FUSER ON
1718192021222324
ENGINE
+24VS
FA NDEV_FUSE
* NEW_DEVE* EGMOT _A1
EGMOT_PHA
* EGMOT_B1
EGMOT_PHB
4PI N
CONN-ECTOR
f orUSB
USB CABLE
CN3
DCU CN1
+5VDCU_DATA
1234
1234
DCU_CLK+5V GND
Not Use d
ENGI NE + SMPS
BUnification ' d
CLUTCH SOLE-NOID CN1
DEV_FUSE CN3CN4FAN
FUSER CN502
STEP-PING
MOTORCN2
CN5
GDIMainBoard
2-2
CONNECTION DIAGRAM
Samsung ElectronicsRepair Manual
1234567891011
+24V_SLEEP+24V GND
*PLREADY*
MOTOR
EXT_CLK*HSYNC
+5V+5V GND
*LD_ONVDO+5V GND
LSU
POLYGONMOTOR
LD DIODE
+5V+5V GND
KEY_TONER*KEY_CANCEL*KEY_DEMO*
123456789
LED
DISPLAYPANEL
123456789
+5VPTL PTL LEDARRAY
12
+24V_SLEEP+24V GNDTHV PWM
*THV_ENTHVRE AD
*M H VP WMBI ASPW M+5V+5V GND
HV PS
123456789
THERM_ATHERM_B
12THERMI STOR
+24V
+24VS
123
COVERSWITCH
+5V*PEMPTY
1234
FEED_SENSOR*+5V GND
SENSORBOARD
36PI N
HOST
COMPUTER
IEEE1284COMPATI ABLE
CABLEJ1 CN12
CN6
CN8
CN11
CN5
CN4
CN2
CN3
12345678910111213141516
SMPS
ENGINE
4PI N
CONN-ECTOR
f orUSB
USB CABLE
CN7
DCU CN9
+5VDCU_DATA
1234
1234
DCU_CLK+5V GND
Not Use d
ENGI NE + SMPS
BUnification ' d
SOLE-NOID CN1
DEV_FUSE CN3CN4FAN
FUSER CN502
STEP-PING
MOTORCN2
CN5
PCLMainBoard
12345123456
12
1718192021222324
123456789101112131415161718192021222324
123456789
12
123
1234
LED_ERRORLED_PAPERLED_DATALED_TONER
+5V GND+5V+5V GND+5V +5V GND+5V+24V GND+24V+24V GND+24V+24V GND+24VEXIT+24VSFUSER ON+24VSMOTOR B*CLUTCHMOTOR_PBFANDEV_FUSEMOTOR_A*NEW_DVE*MOTOR_PA
2-2 PCL Connection Diagram(ML-1250)
3
3-1Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
3. Schematic Diagrams
3.1 GDI Main Circuit Diagram (1/5)
3-2
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
Main Circuit Diagram (2/5)
3-3Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
Main Circuit Diagram (3/5)
3-4
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
Main Circuit Diagram (4/5)
3-5Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
Main Circuit Diagram (5/5)
3-6
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
3.2 PC L Main Circuit Diagram (1/9)
3-7Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
PCL Main Circuit Diagram (2/9)
3-8
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
PCL M a i n Circuit Diagram (3/9)
3-9Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
PCL Main Circuit Diagram (4/9)
3-10
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
PCL M ainCircuit Diagram (5/9)
3-11Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
PCL Main Circuit Diagram (6/9)
3-12
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
PCL M a i n Circuit Diagram (7/9)
3-13Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
PCL M a i n Circuit Diagram (8/9)
3-14
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
PCL M a i n Circuit Diagram (9/9)
3-15Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
5V 18V24VS
24VS18V
24VS
5V
SAMSUNG ELECTRONICS TITLE
REF. NO
DATE 01/01/04
1.0
1 OF 2
DESIGNED CHECKED REV.APPROVED DRW. NO
SIZE A4
SWALLOW-HVPS
CN1-#6 U2-B
CN1-#7 U2-A
JH.CHO
IN
GND
OUT
U3KA7818
7407
7407
JC
R4225.6K
R4112.2K
R401100
Q401A708-Y
R4122K
R403110KF
VR40150K
R40256KF
C408104
C401222
R405220KF
R4062.2KF
C402103
R407240K
R40847K
R409430
C403333
Q402D526-Y
R4101W 3
C4043KV 471
D4014KV
R413MGR1/2W 6MF
R414MGR1/2W 6MF
R416MGR1/2W 15MF
R417MGR1/2W 15MF
R426MGR1/2W 100KF
R5022.2K
R505100KF
R5042K
R503100
R50727K
C503104
R50886.6KF
R50912KF
R5131W 3
R512430
R51147K
C504333
C1104
C2104
C335V 47uF
+
R515MGR1/2W 15MF
R514MGR1/2W 15MF
ZD5011W 100V
D5024KV
Q502D526-Y
C502222
C501104
R516MGR1/2W 50K
R517MGR1/2W 15MF
3 4
ZD4011W 130V
R5015.6K
R506100KF
Q501A708-Y
C5063KV 471
C4052KV 680
C5052KV 680
D4024KV
VR50150K
C4063KV 471
D5011N4148
R51047K
R519MGR1/2W 50K
T501KAB-006
1
4
25
7
6
1 2
U1-CKA324
+
-
10
98
GIL-S-9P-S2T2-EFCN1
123456789
T401KAB-006
1
4
25
7
6
D4031N4148
R40433K
U1-DKA324
+
-
12
1314
D1111N4148
MHV-PWM
BIAS-PWM
18V
MHV
DEV
SUPPLY
OPC
24VSA-GNDTHV-PWMTHV-EATHV-READMHV-PWMBIAS-PWM5VD-GND
3.3 HVPS Circuit Diagram (1/2)
3-16
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
5V18V
24VS
18V
18V
18V
24VS
24VS
D-GND
CN1-#5
CN1-#4
CN1-#8
TITLE
DRW. NO
REF. NO
SIZE A4 DATE 01/01/04
SWALLOW-HVPS
REV.
1.0
2 OF 2
DESIGNED CHECKED APPROVED
SAMSUNG ELECTRONICS
CN1-#3
7407
JH.CHO
U2-F U2-E7407 7407
JC
R2051K
R206100
Q203A708-Y
R2072K
R20830KF
R209110KF
VR20150K
C201103
C202331
R210510KF
D2021N4148
D2011N4148
R2111MF
R212470K
C203472
D2031N4148
ZD2015.6V
ZD2027.5V
R2132.2K
R2141.2K
R215430
Q204D526-Y
C2066KV 471
D2076KV
C2076KV 471
R216BR1/2W 30MJ
R217BR1/2W 200MG
R218MGR1/2W 100KF
C204473
C3062KV 680
C3073KV 471
D3034KV
C3083KV 471Q303
D526-Y
R3142.2KF
VR3025K
C305333
R311100KFQ302
A708-Y
R3102.2K
R30833K
Q301A708-Y
R30733K
R3092.2K
R30626.1KF
R304200KF
R3055.1KF
VR30110K
C304500V 103
C303333
D3021N4148
D3011N4148
R303100KF
R30233K
C302102
R301470K
C301222
C4104
R31/2W 560 ZD1
5.6VC7
104
C10135V 47uF
+
R315BR1/2W 30MJ
C2056KV 101
D3044KV
D2046KV
U1-BKA324
+
-
5
67
R3161KF
R3172KF
13 12 11 10
T201HVT-2A
1
4
25
7
6
R20110K
U1-AKA324
+
-
3
21
411
D2056KV
C2086KV 471
D2066KV
C2096KV 471
T301KAB-006
1
4
25 6
7
U2-C
9 8
147
THV-PWM
5V
THV-EA
THV
THV-READ
HVPS Circuit Diagram (2/2)
3-17Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
+24V 1.8A
+5V 1.0A
GND
NO MARKING RESISTOR 1/4W-J (5%)
1
3
5
6
11
10
7
12
GND
CN5-14
CN5-13,15
CN5-16
EER2828
+5V +24VS
GND GND
1
2
17
4
963181551612
714
813
1A
1B
2A
2B
PHASE1
+ENABLE1
RC
1
SE
NS
E1
E1
VR
EF
GN
D
E2
SE
NS
E2
RC
2
VC
C
VB
B
U1A2918SWH
11 5
PHASE2
+ENABLE2
CN2
35303-0450+5V
GNDGNDGNDGND
+24VS +24V
CN4
35301-0350
GND GND
CN1
35303-0250
F501125V 8A
R5021/2W560K
TNR501
TV
R 1
4D 2
21K
C503
224
LF501APOLLO12
D502
UF
1010
C508
200V
470
uF
V501SCK-054
T501
NP
NB
N24
PC501K1010H
PC501K1010H
U503KA431 2
3
1
L50210uH
CN501
L
F.G
N
C505104
C501222MAD
C502222MAD
C511
103
R517
821W
R5093W47K
R50730
C509
50V
33u
F
C510
2A 2
23K
R510
1W0.3
D504ER1002FCT
C520
50V
100
0uF
C51510V
1000uF
R5114.3K
R512330
R5162.2K-F
R5152.2K-F
C518
10V
470
uF
- +
BD501FL406
C506222MAD
C517
104
C519104
R521150
R52047K
OP501ITR8406-S
R519
5005W
TNR502
TV
R 1
0D 5
61K
LF502APOLLO12
CN502
12 U501
BTA12-600
PC502KMOC3063
L501300uH
C504
333
R501
1W 47FUSIBLE
R5031/4W
100
R5081W 180FUSIBLE
R5131/2W1.5K
R504 68K
R505
1W47K
F502125V 3A
C5131uF
R51822
R51422
C5221KV 102
C5141KV 102
N5
D503SB1040FCT
R5061W
47K
U502STRT-G6153
VCC5
DRAIN1
OC
P2
GN
D3
FB
4
D501ER102B501
APOLLO12
C507104
C512
2KV
221
K
C521
50V
100
0uF
C8
50V
47u
F
C3
50V
47u
F
C1
331
C2
331
C5
331
R1156K
R101K
C7103
R6
2W 0
.37
R8
1K
R5
2W 0
.37
C6
103
R1556K
C4331
R71.2K
R917.4K-F
R13
2.2K R25.6K
Q31008-Y
D3
1N40
03
R12
510R15.6K
Q11008-Y
D2
1N40
03
CN5-7,9,11
CN5-8,10,12
CN5-1,3,5
CN5-2,4,6
EXIT
+24VS2
FUSER_ON
EGMOT_PHAEGMOT_PHB
+EGMOT_A1+EGMOT_B1
12
34
FAN
123
CLUTCH
12
3.4 SMPS Circuit Diagram (110V)
3-18
SCHEMATIC DIAGRAMS
Samsung ElectronicsRepair Manual
+24V 1.8A
+5V 1.0A
GND
NO MARKING RESISTOR 1/4W-J (5%)
1
3
5
6
11
10
7
12
GND
CN5-14
CN5-13,15
CN5-16
EER2828
+5V +24VS
GND GND
1
2
17
4
963181551612
714
813 1A
1B
2A
2B
PHASE1
+ENABLE1
RC
1
SE
NS
E1
E1
VR
EF
GN
D
E2
SE
NS
E2
RC
2
VC
C
VB
B
U1A2918SWH
11 5
PHASE2
+ENABLE2
CN2
35303-0450+5V
GNDGNDGNDGND
+24VS +24V
CN4
35301-0350
GND
CN1
35303-0250
F501250V 5A
R5021/2W560K
TNR501
TV
R 1
0D 5
61K
C503
224
LF501APOLLO12
D502
UF
1010
C508
450V
150
uF
V501SCK-054
T501
NP
NB
N24
PC501K1010H
PC501K1010H
U503KA431 2
3
1
L50210uH
CN501
L
F.G
N
C505104
C501222MAD
C502222MAD
C511
103
R517
821W
R5093W47K
R50730
C509
50V
33u
F
C510
2A 2
23K
R510
1W0.6
D504ER1002FCT
C520
50V
100
0uF
C51510V
1000uF
R5114.3K
R512330
R5162.2K-F
R5152.2K-F
C518
10V
470
uF
- +
BD501FL406
C506332MAD
C517
104
C519104
R521150
R52047K
OP501ITR8406-S
R519
5005W
LF502APOLLO12
CN502
12 U501
BTA12-600
PC502KMOC3063
L501300uH
C504
333
R501
1W 47FUSIBLE
R5031/4W
22
R5081W 180FUSIBLE
R5131/2W1.5K
R504 22K
R505
1W100K
F502250V 2A
C5131uF
R51822
R51422
C5221KV 102
C5141KV 102
N5
D503SB1040FCT
R5061W
100K
U502STRT-G6153
VCC5
DRAIN1
OC
P2
GN
D3
FB
4
D501ER102B501
APOLLO12
C507104
C512
1KV
221
K
C521
50V
100
0uF
C8
50V
47u
F
C3
50V
47u
F
C1
331
C2
331
C5
331
R1156K
R101K
C7103
R6
2W 0
.37
R8
1K
R5
2W 0
.37
C6
103
R1556K
C4331
R71.2K
R917.4K
R13
2.2K R25.6K
Q31008-Y
D3
1N40
03
R12
510 R15.6K
Q11008-Y
D2
1N40
03
CN5-7,9,11
CN5-8,10,12
CN5-1,3,5
CN5-2,4,6
EXIT
+24VS2
FUSER_ON
EGMOT_PHAEGMOT_PHB
+EGMOT_A1+EGMOT_B1
12
34
FAN
123
CLUTCH
12
SMPS Circuit Diagram (220V)
3-19Samsung Electronics
SCHEMATIC DIAGRAMS
Repair Manual
3.5 Panel Circuit Diagram
Samsung Electronics Digital Printing CS Group
Copyright (c) 2001. 10
This manual is made and described centering around
circuit diagram and circuit description needed
in the repair center in the form of appendix.