R-351NW
11 - 2
[2] OUTER CASE REMOVAL
To remove the outer case, procedure 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: DISCONNECT OVEN FROM POWER SUPPLY
BEFORE REMOVING OUTER CASE.
DISCHARGE THE HIGH VOLTAGE CAPACITOR
BEFORE TOUCHING ANY OVEN COMPONENTS
OR WIRING.
NOTE:
When replacing the outer case, the 2 special Torx
screws must be reinstalled in the same locations.
[3] POWER TRANSFORMER REMOVAL
1. REMOVAL
1. Disconnect the power supply cord and remove outer case.
2. Open the oven door and block it open.
3. Discharge high voltage capacitor.
4. 4. Disconnect wire leads (primary) from power transformer and
the
fi
lament 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.
[4] HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)
To remove the components, proceed as follows.
1. Disconnect the power supply cord and remove outer case.
2. Open the oven 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.
7. Remove the one (1) screw holding capacitor holder to
bottom plate.
8. Remove one (1) screw holding high voltage rectifier
assembly to capacitor holder.
9. Disconnect rectifier terminal from capacitor. High voltage
recti
fi
er assembly is now free.
10. Remove capacitor holder. Capacitor is now free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER
AND HIGH VOLTAGE CAPACITOR, GROUND
S I D E T E R M I N A L O F T H E H I G H V O LTA G E
RECTIFIER MUST BE SECURED FIRMLY WITH A
GROUNDING SCREW.
MAGNETRON
REMOVAL
[5] MAGNETRON REMOVAL
1. REMOVAL
1. Disconnect the power supply cord and remove outer case.
2. Open the oven door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect all wire leads from magnetron.
5. Remove the one (1) screw holding the chassis support to
the magnetron.
6. Release the chassis support from the hole of the oven cavity
front
fl
ange.
2. 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”.
4. Reinstall outer case and check that oven is operating
properly.
Special screw
Screw Driver
(Type: TORX T20 H or
GTXH20-100)
7. Remove the two (2) screws holding air duct to magnetron
and oven cavity top plate.
8. Remove the air duct from oven.
9. Carefully remove the four (4) screws holding magnetron to
waveguide
fl
ange.
10. Remove magnetron with care so that magnetron antenna is
not hit by any metal object around antenna.
11. Now, the magnetron is free.
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6/26/09 6:30:55 PM
6/26/09 6:30:55 PM
