COLOR MONITOR
SyncMaster 753DF (DF17K*)
SyncMaster 755DF (DF17J*)
ManualSERVICE
COLOR MONITOR CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignment & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. Schematic Diagrams
8 Block Diagrams
SyncMaster 753DF/755DF 8-1
S C R E E N
R
G
B
VI
D
EO
B
O
AR
D
TO
D
-C
O
IL
O
N
TH
E
CR
T
VI
D
EO
I
NP
UT
H
/V
S
YN
C
VI
D
EO
O
UT
PU
T
IC
10
3(L
M2
43
7)
R
G
B
- C
UT
O
FF
QR
, G
,B
01
,0
2 G1
H
EA
TE
R
VI
D
EO
P
RE
-A
M
P
+
O
SD
IC
10
1(K
A2
50
6)
IC
10
4(K
A2
50
1)
SO
CK
ET
FB
T
T5
01
H
/V
S
IZ
E
R
EG
.
VE
RT
IC
AL
FO
CU
S
H
O
R.
DY
CN
40
1
VE
R
. D
Y
CN
40
1
H
. D
.
T
T4
01
S-
CO
R.
VE
R
. O
UT
PU
T
IC
30
1
H
O
R.
D
R
IV
E
Q4
03
H
O
R.
/V
ER
.
PR
O
CE
SS
O
R
IC
40
1
H
-S
YN
C1
V-
SY
NC
1
E/
W
_O
UT
12
C
DA
TA
12
C
CL
K
R
EG
.
V-
M
UT
E
S-
CO
RR
EC
TI
O
N
PS
-1
(S
US
PE
ND
)
PS
-2
(P
OW
ER
O
FF
)
H
O
R.
LI
N
EA
R
IT
Y
TI
LT
PO
W
ER
PW
M
C
O
NT
RO
L
IC
60
1C
BR
ID
G
E
R
ET
IF
IE
R
EP
RO
M
IC
20
2
D
EG
AU
SS
IN
G
BL
O
CK
R
L6
01
UP
,
D
OW
N
BR
IG
HT
NI
SS
CO
NT
RA
ST
ER
PI
N
, T
R
AP
SI
ZE
, P
O
SI
,
D
EG
A.
LE
D
PO
W
ER
AC
IN
PU
T
SO
CK
ET
CN
60
1
LI
N
E
FI
LT
ER
L6
01
SW
IT
CH
IN
G
TR
AN
S
T6
01
AC
L
CI
RC
UI
T
CO
NT
RA
ST
CO
NT
RO
L
BR
IG
HT
NE
SS
CO
NT
RO
L
+
56
V
+
13
V
-
12
V
+
6.
3V
+
70
V
PS
-2
VE
R
.O
UT
&
T
IL
T
CO
NT
O
RL
H
EA
TE
R
V
O
LT
AG
E
CO
NT
RO
L
PO
W
ER
-O
FF
M
O
DE
C
O
NT
RO
L
Q6
07
+
12
V
R
EG
UL
AT
O
R
PS
-1
, P
S-
2(F
ro
m
M
CU
)
CR
T
H
EA
TE
R
G
1
+
12
V
TO
VI
D
EO
-
21
0V
+
30
V
+
12
V
CO
NT
RA
ST
CO
NT
RO
L
BR
IG
HT
NE
SS
CO
NT
RO
L
-
21
0V
(F
RO
M
F
BT
)
VE
R
. B
LA
N
KI
N
G
Q3
03
KS
C9
45
24
LC
04
FR
O
M
M
CU
B(
+)
FR
O
M
IC
40
1
H
-S
YN
C,
V
-
SY
NC
TD
A4
85
9
KA
21
42
FR
O
NT
C
O
NT
RO
L
BO
AR
D
SI
G
NA
L
M
A
IN
B
OA
R
D
H
/V
F O C U S
M
CU
IC
20
1
H
O
R.
O
UT
Q4
04
DY
N
AM
IC
F
O
CU
S
T5
02
KS
C5
80
2
SyncMaster 753DF/755DF 9-1
1
2
3
H +
V +
4 V–
1
2
3
1
2
3
(YEL)V+
NC
(Brown)V –
V +
NC
V –
CN401
1
2
AC
AC
1
2
AC
AC
1
2
3
AC INPUT
NC
AC INPUT
TILT
9
10
11
12
13
1
2
3
4
5
6
7
8
FBT
1
5
P
I
N
D
-
S
U
B
r
e
f
e
r
t
o
p
i
n
a
s
s
i
g
n
m
e
n
t
o
f
p
r
o
d
u
c
t
s
p
e
c
.
DEGAUSSING COIL
AC INPUT
CRT SOCKET
G2
CN402
CN302
CN303
CN301
GT601
GT602
CN601
MAIN PCB CRT SOCKET PCB
FOCUS
(WHT)
123
123
N
C
T
I
L
T
–
(
B
L
K
)
T
I
L
T
+
N
C
T
I
L
T
–
H–
H +
NC
H–
NC
1
2
3
4
T
I
L
T
+
(
W
H
T
)
70 V
IICCLK
CLAMP
5 V
GND
GND
6.3 V
G1
12 V
V-SYNC
ACL
IICDATA
AFC
9
10
11
12
13
14
1
2
3
4
5
6
7
8
(RED) H+
(BLUE) H-
(YEL) V+
(BROWN)V-
NC
TCO +
TCO – (GND)
NC
TCO +
TCO – (GND)
CN502
15"/17" PHS CDT
15" TSB CDT
1
2
V+
V–
H+
NC
NC
H–
2 x 3p DY 15"/17" 15"/17"
FOCUS1 (WHT)
FOCUS2 (RED)
CN304
CN501
CN201
G
N
D
H
-
I
N
D
D
C
C
L
K
D
D
C
5
V
S
-
R
A
S
T
E
R
D
D
C
D
A
T
A
V
-
I
N
123456
7
CN202
G
N
D
H
-
I
N
D
D
C
C
L
K
D
D
C
5
V
S
-
R
A
S
T
E
R
D
D
C
D
A
T
A
V
-
I
N
123456
7
70 V
GND
6.3 V
IICCLK
CLAMP
5 V
GND
G1
12 V
V-SYNC
ACL
IICDATA
AFC
BLANK
123456
C
N
1
0
1
R
G
N
D
G
N
D G
G
N
D
B
123456
S
I
G
N
A
L
C
A
B
L
E
R
_
I
N
G
N
D
_
R
G
N
D
_
G
G
_
I
N
G
N
D
_
B
B
_
I
N
2 x 3p DY
CN102
9 Wiring Diagram
10-1 SyncMaster 753DF/755DF
R526
C406
C443
R456
Q422Q608
D407
T502
R431
C410
C448
R530
R516
L402
L401
C421
C441
R419
IC201
L403
R505
R458
C425
R444
R532
C445
CN501
R459
R455
BD403
C447
R457
R212
Q420
R420
C412
BD401
Q407
C604
C446
D430
C624
D515
BD402
C603
R443
C442
D516
T501
C621
C411
C427
D617
R507
R239
R211
C417
C431
D409
Q403
C444
C435
Q421
C430
C408
C420
R425
R427
D405
D431
D406
D612
R410
GT501
R531
HS403
C225
C419
Q404
C436
R432
R527
R428
D408
D422
C404
Q402
C613
Q423
V_REG_1
S4
S4
REG
REG
V_REG_1
10 Schematic Diagrams
10-1 Main Part Schematic Diagram
10 Schematic Diagrams
SyncMaster 753DF/755DF 10-2
10-2 Video Part Schematic Diagram