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6. SMPS
DC 5V is not output.
YES
Replace the [U4140 : TOP268VG
Is [U4140 : TOP268VG] dam-
and D4142 / D4143 / D4144 /
aged?
D4145].
NO
YES
Is the fuse [F4140] functioning
Is [D4142 / D4143 / D4144 /
properly?
D4145 / IC4140] damaged?
NO
YES
Are there any short circuits
Repair the short circuited area
caused by the soldering on the
on the PCB.
PCB?
NO
YES
Are any parts damaged?
Check the damaged parts.
Operation waveform for each part
YES
Replace the damaged part.
YES
Replace the damaged part.
SMPS unit
(Unloaded)
Set
90
A
After primary side rectification
(Caution: High voltage, electric shock)
(Caution: High voltage, electric shock)
C4148
0.01UF/250V
OPTION
OPTION
D4142
1N4007S
ZD4147
ZD4151
D4143
1N4007S
ZJ39B
ZJ22B
ZD4148
ZD4152
D4144
1N4007S
ZJ39B
ZJ22B
ZD4149
D4145
1N4007S
ZD4153
ZJ39B
ZJ22B
C4153
C4149
0.01UF/250V
ZD4165
ZD4154
1000PF/1KV-3216
ZJ15B
ZJ22B
ZD4155
ZJ22B
ZD4156
ZJ22B
R4141
ZD4157
1M
ZJ22B
R4142
R4154
1M
10
C4171
D4147
R4164
47PF/1KV-3216
AP01C-V1
1M
D4146
ZD4150
ZD4164
1N4007S
ZJ27B
ZJ12B
R4147
270K
ZD4158
OPTION
ZD4162
ZJ39B
ZJ12B
TR4140
ZD4163
ZD4161
INK0010AC1
ZJ12B
OPEN
R4151
R4153
OPTION
1
2
3
4
6
ZD4160
11K
6R8
ZJ7.5B
U4140
TOP268VG
OPTION
OPTION
12
11
10
9
8
7
R4152
C4152
10K
R4145
47/25(NXA)
1M
A
B
A
B
B
Primary drain
C
After secondary rectifications
D4149
AVR : S30SC6MT
SR : MBR3060PT
D4149
S30SC6MT
1
3
R4165
2
33(1)
C4169
10N-100V(PEF)
T4140
EER2525
2
13
3
12
4
5
10
D4148
UF4004
6
9
C4155
10/50(NXA)
C4156
2200PF/400V
C4160
1U-K
KIA2431AP
C4167
OPEN
BKT4143
C4154
M3
100N-K
RLY4140
JZC-36FD
D4150
1N4148
C4157
OPEN
R4156
TR4142
4K7
C
C
U4143
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