Outer Case Removal; Power Transformer Removal; Magnetron Removal; Component Replacement And Adjustment Procedure - Sharp R-310AK Supplemental Service Manual

R-310AK
R-330AK
R-330AW

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE.
DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING
AFTER REMOVING OUTER CASE.
To remove the components, procedure as follows.
1. Disconnect oven from power supply.
2. Remove four(4) screws from rear and one (1) screws
along the right side of case.
3. Slide the entire case back out about 1 inch(3 cm) to free
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from power transformer,
magnetron and capacitor terminals.
4. Remove four (4) screws holding transformer to bottom
plate right.
5. Remove transformer from bottom plate right.
6. Remove the one (1) terminal insulator and tube from
filament lead (longer one) of power transformer.
Re-install
1. Install the terminal insulator to receptacle of filament
1. Open covers of the terminal insulator by using small flat
type screw driver.
2. Remove the receptacle from the terminal insulator.
3. Now, the terminal insulator is free.
Terminal
insulator
Removal
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from magnetron.
4. Remove the one (1) screw holding chassis support to
magnetron.
5. Remove the chassis support from oven.
6. Remove the one (1) screw holding the magnetron air
guide to the magnetron.
7. Carefully remove the two (2) screws holding magnetron
to waveguide flange.
8. Lift up magnetron with care so that magnetron antenna
is not hit by any metal object around antenna.
9. Now, the magnetron is free.
Re-install
1. Re-install the magnetron to waveguide flange with the
two (2) screws diagonally as shown in Figure C-1.
2. Re-install the magnetron air guide to magnetron with the
one (1) screw.
3. Insert the two (2) tabs of the chassis support to the oven

OUTER CASE REMOVAL

POWER TRANSFORMER REMOVAL

TERMINAL INSULATOR REPLACEMENT
Flat type
screw driver

MAGNETRON REMOVAL

24
it from retaining clips on the cavity face plate.
4. Lift entire case from the unit.
CAUTION: DISCONNECT OVEN FROM POWER SUP-
PLY BEFORE REMOVING OUTER CASE.
lead (longer one) of power transformer.
2. Rest transformer on the bottom plate right with its primary
terminals toward the oven face plate.
3. Secure transformer with four screws to bottom plate
right.
4. 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 29 or 30.
5. Re-install outer case and check that oven is operating
properly.
Installation
1. Insert the receptacle into terminal insulator.
2. Close covers of the terminal insulator, as shown below.
COVERS
RECEPTACLE
cavity front plate and the back plate.
4. Re-install the chassis support to magnetron with the one
(1) screw.
5. Reconnect the wire leads to the magnetron. Refer to
"PICTORIAL DIAGRAM" on page 29 or 30.
6. Re-install outer case and check that the oven is operating
properly.
CAUTION: WHEN REPLACING MAGNETRON, BE SURE
THE R.F. GASKET IS IN PLACE AND MOUNT-
ING SCREWS ARE TIGHTENED SECURELY
Figure C-1. Magnetron replacement
SCREWS
MAGNETRON
WAVEGUIDE
FLANGE