A
B
C
A
B
C
SMPS unit
(Unloaded)
Set
Operation waveform for each part
6. SMPS
Is [U4140 : TOP268VG] dam-
aged?
Is [D4142 / D4143 / D4144 /
D4145 / IC4140] 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
R
414
3
330
K
100
N
-K
C
415
0
100
N
-K
C
415
9
1N4007S
D4144
1N4007S
D4143
1N4007S
D4142
R
414
8
2M
2
C
414
7
100
N
-K
10
N
-K
C
414
6
1N4007S
D4145
ZJ12B
ZD4162
ZJ12B
ZD4163
OPTION
D4146
1N4007S
R
415
0
1M
R
414
9
2M
2
47/25(NXA)
C4152
ZD4150
ZJ27B
10/50(NXA)
C4155
UF4004
D4148
D4147
AP01C-V1
C4153
1000PF/1KV-3216
OPEN
C4157
O
PE
N
C
416
8
C
416
3
1U
-K
33(1)
R4165
R4155
10K
D4150
1N4148
R
416
8
O
PE
N
4700
N
-K
C
416
1
2
1
3
MBR3060PT
D4149
ZJ7.5B
ZD4160
INK0010AC1
TR4140
ZJ12B
ZD4164
R4153
6R8
ZD4158
ZJ39B
R4154
10
BKT4143
M3
5600
/6
.3
(N
XA
)
C
416
2
5600
/6
.3
(N
XA
)
C
416
4
5600
/6
.3
(N
XA
)
C
416
5
D
414
0
1N
4007
S
D
414
1
1N
4007
S
OPTION
R4142
1M
OPTION
OPTION
OPTION
C4160
1U-K
C4156
2200PF/400V
OPTION
R4145
1M
C
414
5
0.
047
U
-K
R4164
1M
1M
R4141
C4149
0.01UF/250V
0.01UF/250V
C4148
10K
R4152
C4171
47PF/1KV-3216
ZD4148
ZJ39B
ZD4149
ZJ39B
ZD4165
ZJ15B
ZD4151
P6KE150A
KTC3198G
TR4142
R4156
4K7
C4167
OPEN
R
416
7
O
PE
N
U4143
KIA2431AP
R4147
270K
100N-K
C4154
R4151
11K
ZD4147
ZJ39B
C
415
1
150
/20
0
C4169
10N-100V(PEF)
2
3
4
13
12
9
5
6
10
EE2525
T4140
1
12
2 3
10
4
8
9
6
7
11
U4140
TOP268VG
S
V
S
S
X
C
S
S
F
S
D
B
L817
D
IP
4L
U
414
2
JZC-36FD
RLY4140
A
B
C
After primary side rectification
(Caution: High voltage, electric shock)
Primary drain
(Caution: High voltage, electric shock)
After secondary rectifications
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
89
