Marantz NR1508 - Page 75

Operation waveform for each part
A B C
A B C
SMPS unit
(Unloaded)
Set
6. SMPS
Is [U4140 : TOP268VG] dam-
aged?
Is [D4142 / D4143 / D4144 /
D4145 / U4140] 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 [U4140 : TOP268VG
and D4142 / D4143 / D4144 /
D4145].
DC 5V is not output.
NO
NO
NO
YES
YES
YES
YES
YES
YES
2
1 3
D4140 1N4007S D4141 1N4007S
5600/6.3(12.5*35)C4164
R4155
10K
R4156 4K7
OPTION
R4142
1M
R4164
1M
1M
R4145
ZJ7.5B
ZD4160
ZJ12B
ZD4162
ZD4163
ZJ12B
OPTION
OPTION
ZD4149
ZJ39B
ZD4165
ZJ15B
OPTION
ZD4147
ZJ39B
R4151
11K
OPEN
C4169
D4146
1N4007S
ZD4150
ZJ27B
OPTION
ZD4156
ZJ22B
ZD4157
ZJ22B
ZD4153
ZJ22B
ZD4154
ZJ22B
ZD4151
ZJ22B
C4154
100N-K
D4147
AP01C-V1
R4154
10
1N4007S
D4148
OPTION
BKT4142
C4165
100N-K
100N-KC4159
4700N-KC4161
C4171 OPEN
C4145 100N C4146 100N C4147 100N-K
R4143 330K
R4141
1M
C4150 OPEN
OPEN
ZD4161
ZD4164
ZJ12B
C4151
100/200(NHA)
R4147 270K
ZD4148
ZJ39B
R4152
10K
ZD4155
ZJ22B
ZD4152
ZJ22B
D4150
1N4148
C4160
1UF-K
5600/6.3(12.5*35)C4162
5600/6.3(12.5*35)C4163
U4143
KIA2431AP
C4153 GRM31C7U3A102JW32L C4172 1000P/1KV
OPTION_2
C4149
CT714eV5V103M250VacB
D4144 1N4007S
D4145 1N4007S
CT714eV5V103M250VacB
C4148
D4142 1N4007S
D4143 1N4007S
C4152
47/25(NXA)
R4153
6R8
1
12
2 3
10
4
89
6
711
TOP268VG
IC_TOP268VG
U4140
S V S S
X C
S S
F
S D
ZD4158
ZJ39B
R4150
1M
R4149 2M2
R4148 2M2
C4157
OPEN
TR4142
KTC3198G
C4156
CT710eV5V222M400VacB
D4149
S30SC6MT
10/50(NXA)
C4155
4
10
6
5
2
12
9
13
3
EER2525
T4140
TR4141
INK0010AC1
U414
2
PC123X2Y
FZ
RLY4140
JZC-36FD/005-HLT
A
B
C
After primary side rectification
(Caution: High voltage, electric shock)
Primary drain
(Caution: High voltage, electric shock)
After secondary rectifications
75
Caution in
servicing
Electrical Mechanical Repair Information Updating