Denon AVR-X3300W Service Manual page 81

6. SMPS
DC 5V is not output.
YES
Replace the IC4144
Is IC4144 (TOP268EG) dam-
(TOP268EG) and D4142 /
aged?
D4143 /D4144 / D4145.
NO
YES
Is the fuse (F4140) functioning Is D4142, D4143, D4144,
properly? D4145 or IC4140 damaged?
NO
YES
Are there any short circuits
Repair the short circuited area
caused by the soldering on
on the PCB.
the 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
81
A
After primary side rectification
(Caution: High voltage, electric shock) (Caution: High voltage, electric shock)
D4143 1N4007
OPTION OPTION
D4142 1N4007
C4148 0.01UF/250V
R4148
2M2
ZD4151
D4144 1N4007 ZD4161
P6KE150A
P6KE120A R4149
D4145 1N4007 2M2
C4149 0.01UF/250V
R4150
1M
C4170
47PF/1KV-3225
R4141
1M
R4142
1M
OPTION
D4146 ZD4150
R4164
1N4007 ZJ27B
1M
R4147 ZD4158
270K ZJ39B
D
OPTION OPTION S R4153
6R8
F
ZD4160 R4152 ZD4162 ZJ12B
ZJ7.5B 10K C
X
C4152
11K
V 47/25(NXA)
R4167
ZD4163 ZJ12B
IC4144
ZD4164 ZJ12B TOP268EG
R4145 TR4140
1M INK0010AC1
A B
A B
B
Primary drain
C
After secondary rectifications
C4153
2200PF/1KV-3225
D4149
S30SC6MT
3
1
2
R4165 C4176
R4154 22-3216 4700P-J-2012
10
T4140
C4169
E060283405540V
4700P-J-2012
1 12
D4147
1N4007
2 11 JP4140
OPEN
10
3
PC123X2YFZ
4 9
D4148 5 8
1N4007
7
6
4
C4155
3
10/50(NXA)
C4160 OPEN
C4156
C4163 C4168
3300PF/250V
0-1608 OPEN
C4167 OPEN
C4154 BKT4143
M3
100N-K
RLY4140 D4150
1N4148
JZC-36FD
C4157
OPEN TR4142 R4156 4K7
KTC3198G
R4155
10K
C
C
IC4142