R-7500AT
27
TROUBLESHOOTING
[1]
TR
O
UB
L
E
SH
OO
TI
NG
TA
B
L
E
C
O
ND
IT
IO
NS
PO
S
S
IB
L
E
C
A
USE
A
ND
D
E
FE
C
TI
V
E
P
A
R
TS
P
R
O
B
L
E
M
S
MAGNETRON-1
MAGNETRON-2
INVERTER UNIT-1
INVERTER UNIT-2
INTERLOCK SWITHC-1
INTERLOCK SWITCH-2
MONITOR SWITCH-1
MONITOR SWITCH-2
D00R SENSING SWITCH
POWER UNIT
RELAY UNIT
CONTROL UNIT
ANTENNA MOTOR-1
ANTENNA MOTOR-2
BLOWER MOTOR-1
BLOWER MOTOR-2
NOISE FILTER UNIT
(FUSE 20A)
FUSE-1 F10A
FUSE-2 F10A
MGT THERMISTOR-1
MGT THERMISTOR-2
EXHAUST THERMISTOR
LED LIGHT
FPC
POWER SUPPLY CORD
MISADJUSTMENT OF
SWITCHES
OPENED WIRE HARNESS
BLOCKED VENTILATION
OPENINGS
CHECK OF LIGHT SETTING
EXHAUST TEMP.FUSE
120℃
P
L
UGGE
D
I
N
A
ND
D
OO
R
OPE
NE
D
D
isp
lay
d
o
es
no
t
sho
w
any
thi
ng.
○
○
○
○
○
○
○
○
A
ny
key
i
s
no
t
accep
ted
.
○
○
○
○
Ov
en
d
o
es
no
t
go
i
nt
o
a
c
oo
k
cy
cl
e.
○
○
○
○
○
○
○
○
○
○
○
○
Ov
en
c
oo
ks
s
low
ly
.
○
○
○
○
○
○
○
○
○
○
○
○
Ov
en
st
o
p
s
in
a
c
oo
k
cy
cl
e.
○
○
○
○
○
○
○
Ov
en
d
o
es
no
t
co
unt
t
he
c
oo
ki
ng
ti
m
e
d
ow
n.
○
L
E
D
li
ght
d
o
es
no
t
lig
ht
.
○
○
○
○
B
low
er
m
o
to
r d
o
es
no
t
o
p
er
at
e.
○
○
○
○
○
A
nt
enna
m
o
to
r d
o
es
no
t
o
p
er
at
e.
○
○
○
○
○
EE
1
○
○
○
○
①
EE
2
○
○
○
○
②
EE
3
○
○
○
○
○
○
○
○
○
○
○
○
EE
10
○
EE
16
○
EE
17
○
○
EE
20
○
EE
26
○
EE
29
○
①：
Wi
ri
ng
o
f
the
m
agne
tr
o
n-1
d
ri
ve
ci
rcu
it
i
s
o
p
ened
.
②：
Wi
ri
ng
o
f
the
m
agnet
ro
n-2
d
ri
ve
ci
rcu
it
i
s
o
p
ened
.
③：
The
co
nt
ro
l
ha
rness
i
s
o
p
end
.
M
IC
R
O
W
AV
E
C
OO
K
ING
E
R
R
O
R
D
IS
P
L
A
YE
D
TROUBLESHOOTING
