NO
NO
NO
Is IC4140 (TOP268VG) dam-
aged?
Is D4142, D4143, D4144,
D4145 or 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 IC4140
(TOP268VG) and D4142 /
D4143 /D4144 / D4145.
DC 5V is not output.
R4143 330K
100N-KC4150
100N-KC4159
1N4007D4144
1N4007D4143
1N4007D4142
R4148
2M2
OPTION
C4147 100N-K
10N-KC4146
1N4007D4145
ZJ12B
ZD4162
ZJ12B
ZD4163
OPTION
D4146
1N4007
R4150
1M
R4149
2M2
47/25(NXA)
C4152
ZD4150
ZJ27B
10/50(NXA)
C4155
1N4007
D4148
OPEN
C4157
C4163
1U-K
22(1)
R4165
R4155
10K
D4150
1N4148
4700N-KC4161
2
1 3
S30SC6MT
D4149
D4140 1N4007
D4141 1N4007
ZJ7.5B
ZD4160
3
1
2
INK0010AC1
TR4140
ZJ12B
ZD4164
R4153
6R8
ZD4158
ZJ39B
R4154
10
BKT4143
M3
5600/6.3(NXA)C4162
5600/6.3(NXA)C4164
5600/6.3(NXA)C4165
R4142
1M
OPTION
OPTION
OPTION
C4160 1U-K
C4156
3300PF/250V
OPTION
R4145
1M
C4145 0.047U-K
ZD4161
OPEN
R4164
1M
1M
R4141
C4149 0.01UF/250V
0.01UF/250VC4148
10K
R4152
D4147
AP01C-V1
ZD4156
ZJ22B
ZD4157
ZJ22B
ZD4154
ZJ22B
ZD4152
ZJ22B
ZD4153
ZJ22B
C4153
1000PF/1KV-3216
ZD4148
ZJ39B
ZD4149
ZJ39B
ZD4165
JUMPER
KTC3198G
TR4142
R4156
4K7
C4168
OPEN
C4167 OPEN
IC
KIA
R4147
270K
ZD4155
ZJ22B
100N-K
C4154
R4151
11K
ZD4151
ZJ22B
C4151
100/200(NHA)
ZD4147
ZJ39B
C4169
2200P-100V(PEF)
C4170 OPEN(15000/6.3)
4
10
6
5
2
12
9
13
W1
3
W4
W3
W5
W2
EER2525
T4140
1
12
2
3
10
4
89
6
7
11
IC4140
TOP268VG
S V
S
S
X
C
S
S
F
S D
IC
PC
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
Operation waveform for each part
A B C
A B C
SMPS unit
(Unloaded)
Set
YES
YES YES
YES
YES YES
6. SMPS
80
Caution in
servicing
Electrical Mechanical Repair Information Updating
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