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R- 320DK
R-3 20DQ
R-320DW
POWER TRANSFORMER REMOVAL
Re-instal
1. Rest transformer on the bottom plate with its primary
terminals toward the oven face plate.
2. Secure transformer with four screws to bottom plate.
3. Re-connect wire leads (primary and high voltage) to
power transformer and filament leads of transformer to
magnetron and high voltage capacitor. Refer to
"PICTORIAL DIAGRAM" on page 32
4. Re-install outer case and check that oven is operating
properly.
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 wire leads (primary and high voltage) from
power transformer and the filament leads from the
magnetron and capacitor terminals.
5. Remove four (4) screws holding transformer to bottom
plate.
6. Remove transformer from bottom plate.
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. Open covers of the terminal insulator by using small flat
type screw driver.
5. Remove the receptacle from the terminal insulator.
6. Now, the terminal insulator is free.
Installation
1. Insert the receptacle into terminal insulator.
2. Close covers of the terminal insulator, as shown below.
3. Reconnect all leads removed from components during
testing.
4. Reinstall the outer case (cabinet).
5. Reconnect the power supply cord after the outer case is
installed.
6. Run the oven and check all functions.
TERMINAL INSULATOR REPLACEMENT
CAUTION: 1. DISCONNECT OVEN FROM POWER SUP
PLY BEFORE REMOVING OUTER CASE.
2. DISCHARGE THE HIGH VOLTAGE CA-
PACITOR BEFORE TOUCHING ANY OVEN
COMPONENTS OR WIRING.
HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL
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 B from the power
transformer.
5. Disconnect the high voltage wire of high voltage rectifier
assembly from the magnetron.
6. Disconnect the filament lead (short one) of the power
transformer from the high voltage capacitor.
7. Remove one (1) screw holding capacitor holder to oven
cavity rear plate.
8. Remove one (1) screw holding high voltage rectifier
assembly to capacitor holder.
9. Disconnect rectifier terminal from capacitor.
High voltage rectifier assembly is now free.
10.Disconnect the high voltage wire B from the high voltage
capacitor.
11.Remove capacitor holder. Capacitor is now 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.
MAGNETRON REMOVAL
Removal
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 all wire leads from magnetron.
5. Disconnect the wire leads from thermal cut-out (MG).
6. Remove the four (4) screws holding chassis support to
magnetron, oven cavity back plate, oven cavity front
flange and fan duct.
7. Remove the chassis support from oven.
8. Carefully remove the four (4) screws holding magnetron
to waveguide flange.
9. Lift up magnetron with care so that magnetron antenna
is not hit by any metal object around antenna.
10.Remove the two (2) screws holding the magnetron duct
to magnetron.
11.Remove the magnetron duct with thermal cut-out (MG)
NOTE: When replacing the outer case, the 2 special
Torx screws must be reinstalled in the same
locations.
Terminal
insulator
Flat type
screw driver
Receptacle
Covers
