R- 308JK
R - 308JS
R-308JW
R-309JW
22
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) from power transformer
and the filament leads and high voltage wire from the
magnetron and capacitor terminals.
5. Remove four (4) screws (two (2) screws from the upper side
and two (2) screws from bottom side) holding transformer to
bottom plate.
6. Remove transformer from bottom plate.
HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL
Special screw
Screw Driver
(Type: TORX T20 H or
GTXH20-100)
To remove the outer case, proceed as follows.
1. Disconnect the power supply cord.
2. Open the oven door and block it open.
3. Remove the two (2) screws from the lower portion of the rear
cabinet using a T20H Torx type or GTXH20-100 screw
driver.
4. Remove the remaining three (3) screws from rear and one
(1) screw along the right side of outer case.
5. Slide the entire outer case back out about 1 inch (3 cm) to
free it from retaining clips on the cavity face plate.
6. Lift entire outer case from the unit.
CAUTION: 1. DISCONNECT OVEN FROM POWER SUP
PLY BEFORE REMOVING OUTER CASE.
2. DISCHARGE THE HIGH VOLTAGE CAPACI-
TOR BEFORE TOUCHING ANY OVEN COM-
PONENTS OR WIRING.
OUTER CASE REMOVAL
To prevent an electric shock, take the following precau-
tions.
1. Before wiring,
1) Disconnect the power supply cord.
2) Open the door block it open.
3) Discharge the high voltage capacitor and wait for 60
seconds.
2. Don’t let the wire leads touch to the following parts;
1) High voltage parts:
Magnetron, High voltage transformer, High voltage
capacitor and High voltage rectifier assembly.
2) Hot parts:
Oven lamp, Magnetron, Power transformer and Oven
cavity.
WARNING FOR WIRING
3) Sharp edge:
Bottom plate, Oven cavity, Waveguide flange and
other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Turntable motor, Switch, Switch
lever, Open button.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector until its pin is locked and
make sure that the wire leads do not come off even if the
wire leads are pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any of the
following removal procedures:
NOTE: When replacing the outer case, the 2 special
Torx screws must be reinstalled in the same
locations.
POWER TRANSFORMER REMOVAL
Reinstallation
1. Rest transformer on the bottom plate with its primary
terminals toward the oven face plate.
2. Secure transformer with four (4) screws (two (2) screws from
the upper side and two (2) screws from bottom side) to
bottom plate.
3. Reconnect wire leads (primary) to power transformer and
filament leads and high voltage wire of transformer to
magnetron and high voltage capacitor. Refer to "PICTORIAL
DIAGRAM" on page 28.
4. Reinstall outer case and check that oven is operating
properly.
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 power transformer
from the high voltage capacitor.
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.
