Sharp R-cd1800m Service Manual

RCD2200M
10 – 2
10.Remove the eight (8) screws holding the rear cover and exhaust
cover to the bottom plate, power supply cord angle, intake duct and
exhaust duct.
11. Remove the rear cover with the fan motor and exhaust cover from
the oven cavity.12.Now, the rear cover with the fan motor and exhaust cover is free.
NOTE: Do not forget to re-connect the wire leads to the exhaust fan
when the rear cover and outer case cabinet are reinstalled.
[3] POWER TRANSFORMERS (1) AND/OR (2) REMOVAL
1. Disconnect the...

RCD2200M
10 – 3
3. Discharge two high voltage capacitors.
4. Remove the two (2) screws holding the capacitor unit angle to the
intake duct assembly or the exhaust duct assembly.
5. Remove one (1) screw holding the capacitor band to capacitor unit
angle. 
6. Remove one (1) screw holding ground side terminals of high volt-
age rectifier assembly to the capacitor band.
7. Remove the capacitor band from the high voltage capacitor.
8. Disconnect all wire leads from the high voltage capacitor.
9. Now, the...

RCD2200M
10 – 4
[9] EXHAUST FAN REMOVAL
1. Disconnect the power supply cord and then remove the outer case
and the rear cover, referring to “OUTER CASE AND REAR COVER
REMOVAL”.
2. Open the oven door and block it open.
3. Discharge the two high voltage capacitors.4. Make sure that the connector of the exhaust fan has been discon-
nected from the wire harness.
5. Remove the four (4) screws and the two (2) nuts holding the
exhaust fan.
6. Now, the exhaust fan is free.
[10] FAN MOTORS REMOVAL
1. Disconnect...

RCD2200M
10 – 5
NOTE: 1) Before attaching a new key unit, remove remaining adhe-
sive on the panel fixing plate surfaces completely with a
soft cloth soaked in alcohol.
2) When attaching the key unit to the panel fixing plate,
adjust the lower edge and left edge of the key unit to the
correct position of panel fixing plate.
3) Stick the key unit firmly to the panel fixing plate by rubbing
with soft cloth to prevent scratching.
4) When the control unit is replaced, set the standard volt-
age referring to...

RCD2200M
10 – 6 2. After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when in the
latched position.
2. The door sensing switch and secondary interlock switches (1), (2)
interrupt the circuit before the door can be opened.
3. Monitor switches (1), (2) contacts close when door is opened.
4. Re-install outer case and check for microwave leakage around
door with an approved microwave survey meter. (Refer to Micro-
wave Measurement Procedure.)
Figure C-4. Latch Switch...

RCD2200M
10 – 7
[18] DOOR DISASSEMBLY
1. CHOKE COVER REMOVAL
1. Remove the door assembly from oven cavity, referring to “DOOR
REMOVAL”.
2. Insert a putty knife (thickness of about 0.5mm) at the three (3) posi-
tions in gap between the choke cover and the door panel of the
latch heads side as shown in the fig.C-6, to free engaging parts. 
3. Push the each four (4) positions of the upper side and lower side of
chock cover by your finger as shown in the Fig.C-6, to free engag-
ing parts.
4. Pull the chock...

RCD2200M
10 – 8 8. DOOR CASE REMOVAL
After removing door panel; 
1. Remove the five (5) screws holding the key fixing plate to the door
frame.
2. Remove the key fixing plate from the door frame.
3. Remove the front door glass from the door frame, referring to
“FRONT DOOR GLASS REMOVAL”.
4. Remove the door handle, the door lever with the handle cover from
the door frame, referring to “DOOR HANDLE, DOOR LEVER AND
HANDLE COVER REMOVAL”.
5. Remove the one (1) screw holding the latch angle assembly to the...

RCD2200M
11  –  1
RCD2200M

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RCD2200M
11  –  2
Harness of
exhaust thermistor Sensor harness
CPU harnessKey unit ribbon cable
Connector CN-FConnector CN-G
Connector CN-Z
Connector CN-HControl
unit
Antenna
motor (1)
Antenna
sensor (1)Microwave
sensor
Exhaust
motor
Exhaust
thermistor
Main wire harness
Sensor harnessWhite/Orange/Blue
Red/Blue
Green/Yellow
Brown/Red
Black
White/White
Exhaust
thermistorOven temp.
fuse
TOP VIEW CONTROL UNIT
Monitor switch (2)
Yellow (Blue case)
Blue (Blue case)
Blue (Blue case)
Brown/White
(Blue case)...

RCD2200M
11  –  3
BRN 1
2
3
WHT
CN1
WHT 1
2
3
WHT
CN-B
Main wire harness
NOTE:
The red and blue wire leads to the cabinet side terminals of
RY2 and RY3 should go through inside the core of CT1
RELAY UNIT SWITCHING POWER SUPPLY UNIT
Main wire harness
Main wire
harnessMain wire
harness
RED
1 2
GRN
CN21
RED 1
2GRN
CN-E
RED
WHT 1
2
3
4
5BLK
CN-A
DC harness 22DC harness 22
DC harness 22
DC harness 22
CPU harness Grounding wirePrimary interlock
relay RY1Cook relay (1)
RY2
Cook relay (2)
RY3
BRN
RED
BLU
BRN...