NO
NO
NO
Is IC4144 (TOP268EG) 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 IC4144
(TOP268EG) and D4142 /
D4143 /D4144 / D4145.
DC 5V is not output.
10N-KC4146
4.7U-KC4161
5600/6.3(NXA)C4164
R4142
1M
1N4007D4142
1N4007D4143
2M2
R4148
R4143 330K
C4147 100N -K
C4145 47N-K
100N-KC4150
R4164
1M
1M
R4141
1N4007D4144
1N4007D4145
OPTION
1N4007
D4146
R4149
2M2
R4153
6R8
ZD4150
ZJ27B
ZD4158
ZJ39B
ZD4151
P6KE150A
10/50(NXA)
C4155
1N4007
D4148
C4156
3300PF/250V
C4163
0-1608
JP4140
OPEN
R4155
10K
100N-KC4159
2
1
3
D4149
S30SC6MT
D4140
1N4007
R4145
1M
R4152
10K
R4150
1M
OPEN
C4157
BKT4143
M3
R4165
22-3216
5600/6.3(NXA)C4165
21 3 5 64
TOP268EG
IC4144
X
F
S
D
C
V
ZD4164 ZJ12B
ZJ12BZD4163
OPTION
OPTION OPTION
C4160 OPEN
TR4140
INK0010AC1
OPTION
C4149 0.01UF/250V
ZD4162 ZJ12B
R4147
270K
1N4007
D4147
47PF/1KV-3225
C4170
P6KE120A
ZD4161
KTC3198G
TR4142
R4156 4K7
D4150
1N4148
C4168
OPEN
C4167 OPEN
1N4007
D4141
11K
R4167
ZJ7.5B
ZD4160
0.01UF/250VC4148
47/25(NXA)
C4152
100N-K
C4154
R4154
10
C4151
220/200(NHA)
6
5
4
1
8
9
12
2
3
7
10
11
T4140
E060283405540V
C4169
4700P-J-2012
C4176
4700P-J-2012
5600/6.3(NXA)C4162
2200PF/1KV-3225
C4153
3
4
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
81
Caution in
servicing
Electrical Mechanical Repair Information Updating