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B. TROUBLESHOOTING
STEP
SEQUENCE
RESULT
J
(1) PROBLEM
Nodlsplayormis-display
(n
Ihedlsplay
wlndowby
touch-
ing the keys.
al
o
v
Check 240 VAC power supply
through
fuse (8A) and
thermal
protector
for cavity.
I
I
I
-cl
I
O
240
,t,
f
@
I
I
@
I
o
Voll
Check continuity
of fuse,
Replace it
I
Runs
thermal
protector
for
If necessary.
I
cavity, thermal
protector
I
for magnetron
and AC
I
Power cord. If the fuseis
I
I
below. See "F. REMOVING
I
FUSE"
on page 13.
I
I
[ PROBLEM
I
lb
1'
240
volt
I
I
I
1
I
1
J
b
Touch key board
.
nom
000
'
000
Control
c!rcult board
t
Check powe~ supply voltage
on control
circuit
board
(See page 5)
Each voltage
Check resistance of
OK
touch key board.
(See page 6)
I
(Q
I
,'"
I
'(6J
I
Each resistance
Correct
seating of
Normal
control
I
OK
connector
S101 or
circuit
board
I
I
replace
control
I
circuit
board,
I
I
I
Runs
,
I
1=
\a,
@
000
000
'
000
I '@
I
Resistance
Replace
touch key
Normal
touch
I
I
Runs
Incorrect
board.
key board
(ON or OFF)
/
I
I
I
@
I
.'"
I ' @
I
Voltage
Replace control
Normal
control
~
Runs
tincorrect
circuit
board,
circuit board
I
I
i
I
',
I
.(,
1"'.
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