T
roub
l
eshooting
Sa
m
sung
El
ectronics
4-
73
IPM [IGBT] breakdown diagnostics (Inverter PCB)
1
.
P
reparations
before
chec
k
ing
1) P
o
w
er
Off.
2
)
I
P
M
fai
l
ure
,
discharge
m
ode
m
a
y
not
w
or
k
proper
ly
.
T
herefore
, w
ait
m
ore
than
1
5
m
inutes
after
the
P
o
w
er
Off.
3
) R
e
m
o
v
e
a
ll
of
the
In
v
erter
P
CB
connectors
and
w
ire
that
is
fi
x
ed
as
scre
w
.
(
Inc
l
ude
w
ire
that
is
fi
x
ed
to
co
m
pressor
and
DC
R
eactor.
)
4) P
repare
the
digita
l m
u
l
ti
tester.
2.
Inspection
Method
1) R
efer
to
Figure
1
and
T
ab
l
e
1,
respecti
v
e
ly
the
resistance
v
a
l
ue
and
diode
v
o
l
tage
v
a
l
ue
m
easure.
2
)
According
to
the
criterion
in
T
ab
l
e
1
to
deter
m
ine
w
hether
the
fai
l
ure
of
I
P
M.
Di
v
ision
Measured
P
oint
Criterion
R
e
m
ar
k
+
-
Measure
the
resistance
v
a
l
ues
P-
I
G
B
T
U
More
than
500
Ꮒ
Measure
m
ent
error
can
occur
for
reasons
s
uch
as
the
initia
l m
easure
m
ent
condenser
discharge.
Measured
o
v
er
at
l
east
three
ti
m
es.
P-
I
G
B
T
V
P-
I
G
B
T
W
U
N
-
I
G
B
T
V
N
-
I
G
B
T
W
N
-
I
G
B
T
Measure
the
diode
v
o
l
tage
v
a
l
ues
U
P-
I
G
B
T
0.3
~
0.7V
V
P-
I
G
B
T
W
P-
I
G
B
T
N
-
I
G
B
T
U
N
-
I
G
B
T
V
N
-
I
G
B
T
W
< T
ab
l
e
1 >
<
Figure
1 >
ࢉ؟ਫ਼ 3&%
In
v
erter
P
CB
Summary of Contents for AM080*XV Series
Page 205: ...Samsung Electronics 5 1 5 PCB Diagram and Parts List 5 1 ASS Y PCB MAIN...
Page 208: ...PCB Diagram and Parts List 5 4 Samsung Electronics 5 2 ASS YPCBMAIN HUB AC...
Page 210: ...PCB Diagram and Parts List 5 6 Samsung Electronics ASS YPCBMAIN HUB cont DC...
Page 216: ...PCB Diagram and Parts List 5 12 Samsung Electronics 5 4 ASS YPCBFAN Model 1 FANchassis...
Page 218: ...PCB Diagram and Parts List 5 14 Samsung Electronics ASS YPCBFAN cont Model 2 FAN chassis...
Page 241: ...Cycle Diagram 7 10 Samsung Electronics 7 16 AM240 260 280 300MXVAGC...
