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R-21HT
R-21HV
1. Disconnect the power supply cord and then remove
outer case.
2. Open the oven door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the filament leads of power transformer from
high voltage capacitor and the magnetron.
5. Disconnect the H.V. wire from the power transformer.
HIGH VOLTAGE RECTIFIER ASSEMBLY AND HIGH VOLTAGE CAPACITOR REMOVAL
To remove the components, proceed as follows.
1. Disconnect the power supply cord and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect H.V. wire of the high voltage rectifier assembly
from the magnetron and the power transformer.
5. Disconnect the filament lead of the power transformer
from the high voltage capacitor.
6. Remove one (1) screw holding earth side terminal of the
high voltage rectifier assembly.
7. Disconnect all the leads and terminals of high voltage
rectifier assembly from the high voltage capacitor.
1. Disconnect the power supply cord and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the high voltage wire of the high voltage
rectifier assembly and filament lead of the transformer
from the magnetron.
5. Remove the one (1) screw holding the airguide to the
magnetron and remove the airguide.
6. Remove the one (1) screw holding the insertion plate A
to the magnetron and remove the insertion plate A.
7. Remove the one (1) screw holding the chassis support
to the magnetron.
CONTROL PANEL ASSEMBLY
1. Disconnect the power supply cord and then remove outer
case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the main wire harness from the control unit.
5. Remove the one (1) screw holding the control panel
assembly to the oven cavity front plate.
6. Lift up the control panel assembly.
7. Now, the control panel assembly is free.
CONTROL UNIT
8. Disconnect the flat ribbon cable from the connector CN-
G.
9. Remove the six (6) screws holding the control unit to the
POWER TRANSFORMER REMOVAL
MAGNETRON REMOVAL
CONTROL PANEL ASSEMBLY REMOVAL
26
6. Disconnect the main wire harness from the power
transformer.
7. Remove the two (2) screws holding the transformer to
base plate.
8. Remove the transformer.
9. Now the power transformer is free.
8. Now, the high voltage rectifier assembly should be free.
9. Remove one (1) screw holding the capacitor holder to
the oven cavity rear plate.
10.Remove one (1) screw holding the fan duct to the oven
cavity rear plate.
11.Release the capacitor holder from the fan duct.
12.Remove the capacitor from the capacitor holder.
13.Now, the capacitor should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI-
FIER AND HIGH VOLTAGE CAPACITOR,
GROUND SIDE TERMINAL OF THE HIGH
VOLTAGE RECTIFIER MUST BE SECURED
FIRMLY WITH A GROUNDING SCREW.
8. Release the tabs of air intake duct from the chassis
support and the oven cavity.
9. Move the air intake duct to the left.
10.Carefully remove four (4) screws holding magnetron to
waveguide, when removing the screws hold the
magnetron to prevent it from falling.
11.Remove the magnetron from the waveguide with care so
the magnetron antenna is not hit by any metal object
around the antenna.
CAUTION: WHEN REPLACING THE MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND
THE MAGNETRON MOUNTING SCREWS
ARE TIGHTENED SECURELY.
control panel frame.
10.Release the two (2) tabs of the control panel frame
holding the control unit to the control panel frame.
11.Now, the control unit is free.
NOTE: 1. Before attaching a new key unit, wipe off remaining
adhesive on the control panel frame surfaces
completely with a soft cloth soaked in alcohol.
2. When attaching the key unit to the control panel
frame, adjust the upper edge and right edge of
the key unit to the correct position of control panel
frame.
3. Stick the key unit firmly to the control panel frame
by rubbing with a soft cloth so not to cause
scratches.
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