Operation waveform for each part
A
B
C
A
B
C
SMPS unit
(Unloaded)
Set
6. SMPS
Is [U4140 : TOP268VG] dam-
aged?
Is [D4142 / D4143 / D4144 /
D4145 / U4140] damaged?
Repair the short circuited area
on the PCB.
Check the damaged parts.
Replace the damaged part.
Replace the damaged part.
Is the fuse [F4140] functioning
properly?
Are there any short circuits
caused by the soldering on the
PCB?
Are any parts damaged?
Replace the [U4140 : TOP268VG
and D4142 / D4143 / D4144 /
D4145].
DC 5V is not output.
NO
NO
NO
YES
YES
YES
YES
YES
YES
2
1
3
D
414
0
1N
4007
S
D
414
1
1N
4007
S
5600
/6
.3
(12
.5
*35
)
C
416
4
R4155
10K
R4156
4K7
OPTION
R4142
1M
R4164
1M
1M
R
414
5
ZJ7.5B
ZD4160
ZJ12B
ZD4162
ZD4163
ZJ12B
OPTION
OPTION
ZD4149
ZJ39B
ZD4165
ZJ15B
OPTION
ZD4147
ZJ39B
R4151
11K
O
PE
N
C
416
9
D4146
1N4007S
ZD4150
ZJ27B
OPTION
ZD4156
ZJ22B
ZD4157
ZJ22B
ZD4153
ZJ22B
ZD4154
ZJ22B
ZD4151
ZJ22B
C
415
4
100
N
-K
D4147
AP01C-V1
R4154
10
1N4007S
D4148
OPTION
BKT4142
C4165
100N-K
100
N
-K
C
415
9
4700
N
-K
C
416
1
C
417
1
O
PE
N
C
414
5
100
N
C
414
6
100
N
C
414
7
100
N
-K
R
414
3
330
K
R4141
1M
C
415
0
O
PE
N
OPEN
ZD4161
ZD4164
ZJ12B
C
415
1
100
/200
(NH
A
)
R
414
7
270
K
ZD4148
ZJ39B
R4152
10K
ZD4155
ZJ22B
ZD4152
ZJ22B
D4150
1N4148
C4160
1UF-K
5600
/6
.3
(12
.5
*35
)
C
416
2
5600
/6
.3
(12
.5
*35
)
C
416
3
U4143
KIA2431AP
C
415
3
G
R
M
31
C
7U
3A
102
JW
32
L
C
417
2
1000
P
/1
K
V
OPTION_2
C4149
CT714eV5V103M250VacB
D4144
1N4007S
D4145
1N4007S
CT714eV5V103M250VacB
C4148
D4142
1N4007S
D4143
1N4007S
C4152
47/25(NXA)
R4153
6R8
1
12
2 3
10
4
8
9
6
7
11
TOP268VG
IC_TOP268VG
U4140
S
V
S
S
X
C
S
S
F
S
D
ZD4158
ZJ39B
R
415
0
1M
R
414
9
2M
2
R
414
8
2M
2
C4157
OPEN
TR4142
KTC3198G
C4156
CT710eV5V222M400VacB
D4149
S30SC6MT
10/50(NXA)
C4155
4
10
6
5
2
12
9
13
3
EER2525
T4140
TR4141
INK0010AC1
U4142
PC123X2YFZ
RLY4140
JZC-36FD/005-HLT
A
B
C
After primary side rectification
(Caution: High voltage, electric shock)
Primary drain
(Caution: High voltage, electric shock)
After secondary rectifications
75
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating