B. TROUBLESHOOTING
STEP
SEQUENCE
RESUL
T
(1) PROBLEM
No display or mis-display in
the display window by touching
the keys.
a
Check 230V
AC power
supply of connector S1
between Pin3 and Pin 5
after removing connector
S1 from control circuit
board.
Check continuity of
FUSE
,
Thermal Protector for cavity
,
Thermal Protector for
magnetron and
AC Power
Cord.
If the fuse has blown see
"D. REMOVING FUSE" on
page 13
0 230
0 V
olt
0 230
230 V
olt
PROBLEM
1-b
Control
Circuit Board
Check power supply voltage
on control circuit board.
(See page 7 )
V
oltage
incorrect
Replace it if
necessary
0 V
0
V
Each V
oltage
OK
Normal control
circuit board
Replace control
circuit board.
b
Runs
Runs
Correct seating of
connector S101 or
replace control circuit
board.
Normal control
circuit board
Runs
1
0
0
1
5
0
4
5
0
7
0
0
8
5
0
A
ut
o
St
ar
t
D
ef
.
Ti
m
e
1
0
0
0
-9-
E
M
-S350
-9-
