TROUBLE SHOOTING GUIDE
D oes the fan m otor work w hen you shut
the door and turn the tim er?
Does the oven lam p light?
Does the turntable turn?
R eplace or repair oven lam p,
turntable m otor.
If m icrow ave do not oscillate,
check continuity of filam ent
of m agnetron.
Norm al
reading should
be approx. 0
Ω
Check continuity filam ent
tap (3.3V) of high voltage.
Replace high
voltage
transform er.
Check the diode for
continuity in the reverse and
norm al directions.
Replace high
voltage diode.
Replace
m agnetron.
R eplace
m agnetron.
M eter with 6V or higher
voltage batteries should
be used to check the norm al
direction resistance of
the diode.
C heck the isolation of
filam ent winding of high
voltage transform er.
Replace high
voltage
transform er.
G ood
N O G ood
Poor continuity
NO
Continuity
NO Continuity
Continuity
C ontinuity
C ontinuity in
the reverse
direction.
NO
YES
YES
