Sharp R-354M (serv.man4) Service Manual ▷ View online
R354M - 13
1. CARRY OUT 3D CHECKS.
2. Make sure that a definite "click" can be heard when the
2. Make sure that a definite "click" can be heard when the
microwave oven door is unlatched. (Hold the door in a
closed position with one hand, then push the door open
button with the other, this causes the latch heads to rise,
it is then possible to hear a "click" as the door switches
operate.)
closed position with one hand, then push the door open
button with the other, this causes the latch heads to rise,
it is then possible to hear a "click" as the door switches
operate.)
3. Visually check the door and cavity face plate for damage
(dents, cracks, signs of arcing etc.).
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1. Door does not close firmly.
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1. Door does not close firmly.
COMPONENT REPLACEMENT AND ADJUSTMENT
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before
operating the oven.
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal is damaged.
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
3. The door gasket or seal is damaged.
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
and transmission assembly.
7. There is visible damage to the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
Please refer to ‘OVEN PARTS, CABINET PARTS, DOOR PARTS’, when carrying out any of the following removal
procedures:
procedures:
MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to
2. Remove the control panel assembly referring to
"CONTROL PANEL ASSEMBLY REMOVAL".
3. Disconnect the all leads from the switches.
4. Remove the two (2) screws holding the latch hook to the
4. Remove the two (2) screws holding the latch hook to the
oven cavity.
5. Remove the latch hook.
6. Push the retaining tab slightly and remove the switch.
6. Push the retaining tab slightly and remove the switch.
Figure C-3. Switches
Stop switch
SW3
SW3
Monitor switch
SW2
SW2
Monitored latch
switch SW1
switch SW1
R354M - 14
COMPONENT REPLACEMENT AND ADJUSTMENT
REMOVAL
1. Disconnect the power supply cord.
2. Open the door slightly.
3. Remove the choke cover taking care not to break clips
1. Disconnect the power supply cord.
2. Open the door slightly.
3. Remove the choke cover taking care not to break clips
by inserting an iron plate (thickness of about 0.5mm)
or flat type screw driver to the gap between the choke
cover and door panel as shown Figure C-4 to free the
engaged parts.
or flat type screw driver to the gap between the choke
cover and door panel as shown Figure C-4 to free the
engaged parts.
4. Release choke cover from door panel.
5. Now choke cover is free.
5. Now choke cover is free.
Figure C-4. Door Disassembly
6. Release two (2) pins of door panel from two (2) holes
of upper and lower oven hinges by lifting up.
7. 1. Remove door assy by removing screws (4).
8. Release door panel from tabs of door frame and
8. Release door panel from tabs of door frame and
remove door frame by sliding the door panel downward.
9. Now, door panel with inner sealer film is free.
10. Tear inner sealer film from door panel.
11. Now, door panel is free.
12. Slide latch head upward and remove it from door
10. Tear inner sealer film from door panel.
11. Now, door panel is free.
12. Slide latch head upward and remove it from door
frame with releasing latch spring from door frame and
latch head.
latch head.
13. Now, latch head and latch spring are free.
14. Remove Glass Stopper Screw (noting position of
14. Remove Glass Stopper Screw (noting position of
stopper) and slide stopper down while lifting up.
15.Slide glass towards Glass Stopper position and
then down towards the lower edge of the door
frame.
frame.
16. Lift upper edge of glass, which will now be free
from upper clips and remove from lower clips.
17.Refitting is a reversal of the above when refitting,
ensure the glass and the glass stopper is in the
original position.
original position.
RE-INSTALL
1. Re-install the outer door glass to the door frame with
1. Re-install the outer door glass to the door frame with
the glass stopper.
2. Hold the glass stopper with the one (1) screw.
3. Re-install latch spring to the head. Re-install latch
3. Re-install latch spring to the head. Re-install latch
spring to the door frame. Re-install latch head to the
door frame.
door frame.
4. Re-install door panel to door frame by fitting tabs of
door frame to holes of door panel.
5. Put sealer film on door panel. Refer to “Inner Sealer
Film” and figure C-6, on how to handle the new film.
6. Catch two (2) pins of door panel on two (2) hole of
upper and lower oven hinges.
7. Re-install choke cover to door panel by pushing.
Note: After any service to the door;
(A) Make sure that monitored latch switch, stop
Note: After any service to the door;
(A) Make sure that monitored latch switch, stop
switch and monitor switch are operating properly.
(Refer to chapter “Test Procedures”.).
(Refer to chapter “Test Procedures”.).
(B) An approved microwave survey meter should be
used to assure compliance with proper
microwave radiation emission limitation
standards.
microwave radiation emission limitation
standards.
10
5
4
12
8
7
9
11
3
2
1
Choke Cover
Door Frame
Putty Knife
6
After any service, make sure of the following :
1. Door latch heads smoothly catch latch hook through
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through center of
latch hole.
latch hole.
2. Deviation of door alignment from horizontal line of
cavity face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity
face plate.
4. Check for microwave leakage around door with an
approved microwave survey meter. (Refer to
Microwave Measurement Procedure.)
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
moisture, light or sensing of gentle warm air
movement around oven door is not abnormal
and do not of themselves, indicate a leakage of
microwave energy from oven cavity.
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
moisture, light or sensing of gentle warm air
movement around oven door is not abnormal
and do not of themselves, indicate a leakage of
microwave energy from oven cavity.
Figure C-5. Door Replacement
NOTE: When carrying out any repair to the door,
do not bend or warp the slit choke (tabs on
the door panel assembly) to prevent
microwave leakage.
the door panel assembly) to prevent
microwave leakage.
INNER SEALER FILM
Installation
1. Tear away the backing film.
3. Put the pasted side of the inner sealer film on the door
1. Tear away the backing film.
3. Put the pasted side of the inner sealer film on the door
panel.
Door film
Finger tab
Backing film
Figure C-6. Inner Sealer Film
PIN
PIN
LOWER
OVEN HINGE
OVEN HINGE
UPPER
OVEN HINGE
OVEN HINGE
LOWER
OVEN HINGE
OVEN HINGE
CHOKE COVER
DOOR
PANEL
PANEL
DOOR SUB
ASSEMBLY
ASSEMBLY
SLIT CHOKE
R354M - 15
SCHEMATIC DIAGRAM
Figure 0-1 Oven Schematic
SW3:
SW2:
SW1:
F1:
OVEN
MAGNETRON
680K/0.5W
*
*
*
*
*
INDICATES PARTS WITH POTENTIALS OVER 240V
*
SW
STOP
SWITCH
MONITOR
MONIT'D
CUT-OUT
THERMAL
125
0
C
CUT-OUT
THERMAL
UNIT
B2
B1
OL
FM
M
T
T
TURNTABLE
MOTOR
OVEN
LIGHT
LIGHT
A3
LATCH
FAN MOTOR
SWITCH
NOISE FILTER
CONTROL UNIT
10M/0.5W
NOISE SUPPRESSION COIL
A1
NO.
COM.
RY3
RY1
COM.
NO.
125
0
C
F8A
0.0033 /250V
FUSE
EARTH
N
2100VAC
RECTIFIER
ASYMMETRIC
CAPACITOR
H.V.
POWER TRANSFORMER
RECTIFIER
MAGNETRON
0.0033 /250V
L
G-Y/17
/17
BLU
/17
BRN
230-240V 50Hz
0.22 /250V
1.00 F
R354M - 16
RED
WHT
TURNTABLE
MOTOR
OVEN
N
R
B
U
L
B
CAPACITOR
VOLTAGE
HIGH
SHORT
PROTECTOR
RECTIFIER
HV WIRE B
MAGNETRON
MAGNETRON
THERMAL
THERMAL
CUT-OUT
CUT-OUT
HIGH VOLTAGE COMPONENTS
UNIT
FILTER
NOISE
MAINS SUPPLY CORD
FAN MOTOR
EARTH
NEUTRAL
LIVE
G/Y
BRN
BLU
OVEN LAMP
RED
RED
B
K
L
STOP
SWITCH
BLK
BLK
SWITCH
MONITOR
LATCH
MONITORED
SWITCH
WHT
TOUCH CONTROL PANEL
CN-C
CN-C
WHT
WHT
RED
RED
WHT
BLK
BLK
B L K
W H T
BLK
POWER TRANSFORMER
BLK
YLW
BLK
R E D
1
2
RED
GRN
RED
GRN
CN-B
CN-A
CN-G
RY3
YLW
RY1
RED
2
1
RED
BLK
3
RED
BLK
BLK
WHT
RED
WHT
RED
RED
PICTORIAL DIAGRAM
Figure S-1 Pictorial Diagram
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