Read Sharp R-1900M Service Manual online
R1900M
5 – 2
Home
fuse
blows
when
power
cord
is
plugged
into
wall
receptacle
It
seems
that
the
output
power
is
lower
or
higher
than
the
rated
one.
"
.
"
does
not
appear
in
display
when
power
cord
is
first
plugged
into
wall
receptacle.
Oven
lamp
does
not
go
on
for
1
minute
after
door
is
opened.
Oven
lamp
and
antenna
motors
do
not
go
on
in
cook
cycle.
Oven
goes
into
a
cook
cycle
but
shuts
down
before
and
off
cooking
cycle.
Oven
does
not
go
into
cook
cycle
when
START
pad
is
touched.
Low
or
no
power
is
produced
during
cooking
condition.
(The
food
is
heated
incompletely
or
not
heated
at
all.)
Variable
cooking
does
not
operates
properly,
except
HIGH
power
functions.
Fan
motor
does
not
operate.
Exhaust
fan
does
not
operate.
Exhaust
motor
does
not
operate.
Oven
doen
not
go
into
cook
cycle
when
START
pad
on
the
door
is
touched.
OFF
CONDITION
CONDITION
PROBLEM
COOKING
CONDITION
POSSIBLE
CAUSE
A
ND
DEFECTIVE
PARTS
TEST
P
ROCEDURE
MAGNETRON(1),
(2)
POWERTRANSFORMER
(1),(2)
H.V.RECTIFIER
ASSEMBLY
(1),(2)
HIGHVOLTAGE
CAPACITOR(1),
(2)
SECONDARYINTERLOCK
SWITCH(1),
(2)
PRIMARYINTERLOCK
SYSTEM
DOORSENSING
SWITCH
MONITORSWITCH
(1),(2)
WEAKPOINT
(inNoise
filter)
MAGNETRONTEMP.
FUSE(1),
(2)
OVENTEMPERATURE
FUSE
OVENLAMP
OR
SOCKET
FANMOTORS
EXHAUSTFAN
EXHAUSTMOTOR
FUSEF10
(1),(2)
WEAKPOINTS
(forFan
motors)
WEAKPOINT
(forExhaust
fanm
otor)
EXHAUSTTHERMISTOR
MAGNETRONTHERMISTOR
NOISEFILTER
KEYUNITS
POWERUNIT
RELAYUNIT
CONTROLUNIT
SWITCHUNIT.
AIRFLOW
BLOCKED
LOOSEWIRING
SHORTIN
POWERSUPPLY
CORD
NOPOWER
AT
OUTLET
LOWPOWER
SUPPLYVOLTAGE
AB
C
D
E
F
F
G
J
KK
H
I
I
M
L
O
Q
R
P
N
Weak
point
(in
noise
filter)
blows
when
power
cord
is
p
lugged
into
wall
receptacle.
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