Svan SVMW700 User manual
svan
SVMW700
SERVICE MANUAL
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;+
TIMER MOTOR
(Wire leads removed)
TIME
SW)
A
Measure the resistance.
(Ohm-meter scale: R x 1000)
Note:
TIME S/W and microwave
A is
Ω
Abnormal: ∞or several
Normal: Approx.10~30K Ω
ON/OFF
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CONDITION CHECK RESULT CAUSE REMEDY
CONDITION CHECK RESULT CAUSE REMEDY
1. Fuse blows. Continuity.
No continuity.
Continuity. Shorted contact at
the primary switch.
Replace fuse,
primary, monitors
and secondary
switches.
No continuity.
Normal. Defective high
voltage capacitor.
Replace high
voltage capacitor.
Fuse blows again Defective high volt-
age transformer.
Replace high volt-
age transformer.
Malfunction of the
monitor switch.
Replace fuse,
primary, monitor
and secondary
switches.
Check continuity
of monitor
switch (with
door closed).
Check continuity
of primary
switch (with
door opened).
Disconnect one
side of the wire
lead connected
from transformer
to the high
voltage
capacitor and
operate the unit.
Replace fuse
(TROUBLE 1) Oven lamp does not turn on when the timer is set with door closed.
(TROUBLE 2) Oven does not start even though the timer is set.
NOTE : All these switches must be replaced at the same time.
1. Oven does not
operate.
No continuity.
No continuity. Adjust or replace.
Malfunction of the
primary switch.
Malfunction of the
secondary switch.
Adjust or replace.
Check the
continuity of the
primary switch.
with door
closed.
Check the
continuity of the
secondary
switch with
secondary
switch pushed.
;A
CONDITION CHECK RESULT CAUSE REMEDY
(TROUBLE 3) Grill.
CONDITION CHECK RESULT CAUSE REMEDY
No continuity.
No continuity.
Faulty thermostat.
replace.
Check the
continuity of the
thermostat.
Malfunction of the
timer switch.
replace.
Check the
continuity of the
timer switch
contacts.
1. Heater is not
operating. Abnormal.
Normal
.
Wire connection. No continuity.
Thermostat
(Grill)
Malfunction the
thermostat. Replace.
Malfunction the
heater. Replace.Heater.
Abnormal.
Normal
.
Open or loosen. Replace.
;B
CONDITION CHECK RESULT CAUSE REMEDY
No microwave
oscillation. No continuity.
Continuity.
Malfunction of the
power control
switch.
Replace the power
control switch.
Check the
power control
switch(cooking
state).
Abnormal or burn
out.
Normal
Defective monitor
resistor. Replace
.
Check the
monitor resistor.
Abnormal Defective AC
relay. Replace.
Check the AC
relay.
Abnormal
Shorted H.V diode.
Replace
.
Check H.V.
diode.
Abnormal
Open the
secondary winding
of the high voltage
transformer of
faulty insulation of
filament winding.
Replace
.
Check H.V.
transformer.
Abnormal Faulty capacitor. Replace
.
Check H.V.
capacitor.
Abnormal Faulty magnetron. Replace
.
Magnetron
.
(TROUBLE 4) Oven does not cook at all even though turntable rotates.
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