Sharp R-22AT Service Manual

34
R-22AT
R-23AM
R-24AT
around door with an approved microwave survey me-
ter. (Refer to Microwave Measurement Procedure.)
Note: The door on a microwave oven is designed to act
as an electronic seal preventing the leakage of
microwave energy from oven cavity during cook
cycle. This function does not require that door be
air-tight, moisture (condensation)-tight or light-
tight. Therefore, occasional appearance of mois-
ture, light or sensing of gentle warm air movement
around oven door is not abnormal and do not of
themselves, indicate a leakage of microwave en-
ergy from oven cavity. If such were the case, your
oven could not be equipped with a vent, the very
purpose of which is to exhaust the vapor-laden air
from the oven cavity.
CHOKE COVER REMOVAL
1. Open the door and insert a putty knife (thickness of
about 0.5mm) in gap between the choke cover and
corner portion of door panel to free engaging parts.
Refer to Fig. C-7.
NOTE: As the choke cover and door panel are engage at
16 places, do not force any perticular part.
2. Remove the choke cover carefully. (If choke cover is
broken, replace with a new one.)
Figure C-7. Choke cover
DOOR COMPONENTS REMOVAL
UPPER AND LOWER OVEN HINGES REMOVAL
1. Remove the door assembly from oven cavity, referring
to "REMOVAL" of "DOOR REPLACEMENT AND AD-
JUSTMENT".
2. Remove choke cover, referring to "CHOKE COVER
REMOVAL".
3. Release the oven hinges from the door panel.
4. Now, the oven hinges are free.
DOOR HANDLE REMOVAL
1. Remove the door assembly from oven cavity, "RE-
MOVAL" of "DOOR REPLACEMENT AND ADJUST-
DOOR DISASSEMBLY
UPPER 
OVEN HINGE
LOWER 
OVEN HINGE
CHOKE COVER
DOOR 
HANDLE
LATCH HEAD
BENT
2
1
PUTTY KNIFE
PUTTY KNIFE
CHOKE COVER
DOOR PANEL
FRONT
BENT
MENT".
2. Place door assembly on a soft cloth with latches facing
up.
3. Remove choke cover from door panel, referring to
"CHOKE COVER REMOVAL".
4. Remove two (2) screws holding the door handle to
door.
5. Remove the door handle from door panel.
6. Now, door handle is free.
UPPER AND LOWER LATCH HEADS REMOVAL
7. Remove the door release lever from the door assem-
bly.
8. Remove the three (3) screws holding the joint plate to
the door panel.
9. Release the latch spring from the tab of the joint lever
and joint plate.
10.Release the latch heads from joint lever and joint plate.
11.Now, the latch heads are free.
DOOR CASE REMOVAL
1. Remove the door assembly from oven cavity, referring
to "REMOVAL" of "DOOR REPLACEMENT AND AD-
JUSTMENT".
2. Remove choke cover from door panel, referring to
"CHOKE COVER REMOVAL".
3. Remove door handle from door panel, referring to
"DOOR HANDLE REMOVAL".
4. Bend up four (4) nails of door case.
5. Remove door case from door panel.
6. Now, the door case is free.
DOOR GLASS REMOVAL
7. Remove the four (4) screws holding two (2) outside
window fixing plates to door panel.
8. Now, the door glass is free.
SERVICE INFORMATION
IMPORTANT: When the magnetron MG1 and/or MG2 is replacing, the relays (RY3 and RY4 for R-22AT/24AT; RY2
and RY3 for R-23AM) on control unit must be replaced at the same time. Because if the
magnetron's life has been over, the relay's life may also be over.

Sharp R-22AT Specifications