STEP
SEQUENCE
RESUL
T
a
Nor
mal control
circuit board
Replace control
circuit board.
Replace Ov
en
Ther
mistor
∞
300
Nor
mal
Resistance
.
0
∞
Resistance
Incorrect.
Runs
Runs
(10) PROBLEM
No b
uzzing b
y
touching
k
e
ys and at the end of
cooking
a
Runs
Nor
mal control
circuit board
Replace control
circuit board.
-15-
Chec
k resistance of Ov
en
Ther
mistor betw
een Pin1
and Pin 3 of connector S201
after remo
ving from control
circuit board
Nor
mal Ov
en
Ther
mistor
(9) PR
OBLEM
Ov
erheating e
v
en if the
displa
y windo
w sho
ws
"160C" f
or preheating.
Chec
k nor
mal oper
ation
of control circuit board
and po
w
er circuit board.
NOTES:
-
When the o
v
en ther
mistor circuit is open, the displa
y windo
w will contin
uously
sho
w "160C" e
v
en if the unit becomes o
v
erheated b
y
contin
uous ON of the
heater
.
-
When it is shor
t-circuited, the displa
y windo
w will sho
w the set temper
ature
immediately after the readout of "250C" e
v
en if the heater does not tur
n on.
EM
-S350