Marantz SR5012 Service Manual page 92

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
92
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
ZD4162 OPTION
ZJ39B
ZJ12B
TR4140 ZD4163
ZD4161
INK0010AC1
ZJ12B
OPEN
R4151 R4153
1 2 3 4 6
ZD4160
11K 6R8
C4154
100N-K
ZJ7.5B U4140
OPTION TOP268VG
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
MBR3060PT
1 3
R4165
2
33(1)
C4169
10N-100V(PEF)
T4140
EER2525
2
13
3
U4142
12
PC123X2YFZ
4
5
10
D4148
1N4007S
6 9
C4155
10/50(NXA)
C4156 2200PF/250V
C4160 1U-K U4143
KIA2431AP
C4167 OPEN
BKT4143
M3
RLY4140
JZC-36FD
D4150
1N4148
C4157
OPEN
R4156 4K7
TR4142
KTC3198G
R4155
10K
C
C