Sharp R-9320 Service Manual page 54

R-9320
R-9450
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURES
WARNING: to avoid possible exposure to microwave
energy;
A. Before operating the oven;
1. Make sure that unlatching the door slowly is ac-
companied by a click indicating actuation of the latch
switches.
2. There is a broken door hinge or support.
3. The door gasket or seal is damaged.
4. The door is bent or warped.
5. There is any defective parts in the interlock, oven
door or microwave generating and transmission
assembly.
2. Check visually the door seal for arcing and/or damage.
6. There is any other visible damage
to the oven.
8. Do not operate the oven until after repair if any of the
C.
Do
not operate the oven;
following conditions exist; 1. Without the RF gasket.
1. Door does not close firmly against the front of
2. If the waveguide and oven cavity are not
intact.
appliance.
3. If the door is not closed.
OUTER CASE REMOVAL
To remove
the
outer case,
refer to
Figure 19
and proceed as
3. Slide the entire case back about 3cm to
free
it from
follows:
retaining clips on the
cavity
face plate.
1. Disconnect the oven from
the
power supply.
4. Lift the entire case from the unit.
2. Remove the screws from the rear and along
the side
CAUTION: DISCHARGE THE HIGH VOLTAGE CAPA-
edge of the case.
CITOR BEFORE TOUCHING ANY
OVEN
COMPONENTS OR WIRING.
HIGH VOLTAGE COMPONENTS REMOVAL
(High Voltage Capacitor and Rectifier)
To remove the components, proceed as follows.
4. Remove the single (1) screw holding
the
capacitor holder
1. Disconnect the oven from the power supply and remove
to the mounting bracket, and remove the capacitor
the outer case.
holder.
2. Discharge the high voltage capacitor.
5. Now, the capacitor and rectifier are free.
3. Disconnect the wire leads from the high voltage
capaci-
CAUTION:
WHEN REPLACING THE RECTIFIER,
tor.
THE EARTH SIDE TERMINAL MUST
BE SECURED FIRMLY WITH A EARTH-
ING SCREW.
POWER TRANSFORMER REMOVAL
1. Disconnect the oven from the power supply and remove
the outer case.
2. Discharge the high voltage capacitor.
3. Disconnect the wire leads from the power transformer.
4. Disconnect the filament leads from the magnetron and
high voltage capacitor.
5. Remove the two (2) screws holding the transformer to
the base cabinet (A).
6. Remove the transformer.
COOK RELAY AND CONTROL RELAY REMOVAL
1. Disconnect the oven from the power supply and remove
the outer case.
2. Discharge the high voltage capacitor.
3. Disconnect the wire leads from the cook relay and
control relay.
4. Remove the single (1) screw holding the relay angle
to the base cabinet (A).
5. Slide the relay angle backward and remove it.
6. Now, the cook relay and control relay are free.
OVEN LAMP REMOVAL
1. Disconnect the oven from the power supply. 2. Loosen the screw to
open
then remove the oven lamp.
the lamp access cover, and
52