Marantz NR1609 - Page 86

6. SMPS
1 3
2
OPTION
OPTION
OPTION
OPTION OPTION
BKT4142
OPTION_2
OPTION
EER2525
T4140
TOP268VG
IC_TOP268VG
U4140
S V S S
X C
S S
F
S D
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
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
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
86