Marantz SR5011 Service Manual page 83

6. SMPS
DC 5V is not output.
YES
Replace the IC4140
Is IC4140 (TOP268VG) dam-
(TOP268VG) 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
83
A
After primary side rectification
(Caution: High voltage, electric shock) (Caution: High voltage, electric shock)
C4148 0.01UF/250V
OPTION
OPTION
D4142 1N4007
ZD4147 ZD4151
D4143 1N4007
ZJ39B ZJ22B
ZD4148
ZD4152
D4144 1N4007
ZJ39B
ZJ22B
ZD4149
D4145 1N4007
ZD4153
ZJ39B
ZJ22B
C4149 0.01UF/250V
ZD4165
ZD4154
JUMPER
ZJ22B
ZD4155
ZJ22B
ZD4156
ZJ22B
R4141 ZD4157
1M ZJ22B
R4142
1M
R4164
1M
D4146 ZD4150
ZD4164
1N4007 ZJ27B
ZJ12B
R4147
270K
ZD4158
OPTION
ZD4162
ZJ39B
ZJ12B
TR4140 ZD4163
ZD4161
INK0010AC1
ZJ12B
OPEN
1
OPTION
R4151 R4153
1 2 3 4 6
ZD4160 11K 6R8
3
2
ZJ7.5B
IC4140
OPTION TOP268VG
OPTION
12 11 10 9 8 7
R4152
10K
R4145 47/25(NXA)
1M
A B
A B
B
Primary drain
After secondary rectifications
D4149
S30SC6MT
C4153 1 3
1000PF/1KV-3216
R4165
2
22(1)
C4169
2200P-100V(PEF)
T4140
EER2525
R4154 2
13
10
3
D4147 12
AP01C-V1
4
5
10
D4148
1N4007
6 9
C4155
10/50(NXA)
C4156
3300PF/250V
C4160 1U-K
C4167 OPEN
C4154 BKT4143
M3
100N-K
RLY4140
JZC-36FD
D4150
1N4148
C4152
C4157
OPEN
R4156
TR4142 4K7
KTC3198G
R4155
10K
C
C
C
IC4143
KIA2431AP