Section 4 Component Teardown
4-8
A. Servicing the touch control panel with power
supply of the oven:
Therefore, before checking the performance of the touch
control panel:
1. Disconnect the power supply cord and then remove
the outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
The high voltage transformer of the microwave
oven is still live during servicing and presents a
hazard.
CAUTION
To discharge the high voltage capacitor, wait for 60
seconds and then short-circuit the connection of the
high-voltage capacitor (that is the connecting lead of
the high-voltage rectifier) against the chassis with the
use of an insulated screwdriver.
NOTE
Servicing The Touch Control Panel
Precautions For Handling Electronic Components
This unit uses CMOS LSI in the integral part of the
circuits. When handling these parts, the following
precautions should be strictly followed. CMOS LSI have
extremely high impedance at its input and output
terminals. For this reason, it is easily in
fl
uenced by the
surrounding high voltage power source, static electricity
charge in clothes, etc. and sometimes it is not fully
protected by the built-in protection circuit.
In order to protect CMOS LSI.
1. When storing and transporting, thoroughly wrap
them in aluminium foil. Also wrap all PW boards in
aluminium foil.
2. When soldering, ground the technician and use a
grounded soldering iron and work table.
Servicing of Touch Control Panel
The following are procedures to permit servicing of the
touch control panel of the microwave oven and the
precautions you must take when doing so. To perform
the servicing, power to the touch control panel is
available either from the power line of the oven itself or
from an external power source.
Stirrer Motor Removal
1. Disconnect the power supply cord and remove the
oven from wall and outer case. (Refer to procedure
of “Removal of Oven from Wall” and Outer case
Removal”)
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Remove the hood fan motor and the hood duct
from the oven cavity, referring to the procedure of
“HOOD FAN MOTOR, HOOD DUCT AND OVEN LAMP
SOCKET REMOVAL”.
5. Disconnect the wire leads from the stirrer motor.
6. Remove the two (2) screws holding the stirrer motor
to the waveguide of the oven cavity.
7. Remove the stirrer motor from the waveguide.
8. Now, the stirrer motor is free.
9. When installing the stirrer motor, the shaft of stir-
rer motor must be inserted to the stirrer fan shaft.
Refer to the procedure of “STIRRER COVER AND
STIRRER FAN INSTALLATION”.
Stirrer Cover And Stirrer Fan Removal
1. Put the stirrer fan on the stirrer cover to match the
stirrer fan shaft to the center of the stirrer support.
2. Insert the shaft of stirrer fan to the shaft of stirrer
motor.
3. Insert the cutout of stirrer cover to the tabs on the
ceiling.
4. Install the stirrer cover to the oven cavity, and
secure it by one canoe clip
Shaft
Stirrer Cover
Stirrer Fan
Canoe Clip
Figure 4-6.
Summary of Contents for CGMV173KB
Page 2: ......
Page 14: ...Section 2 Operation 2 2 Figure 2 1 Oven Off Condition Figure 2 2 Oven ON Cooking Condition ...
Page 51: ...Section 5 Wiring Diagrams 5 1 Wiring Schematic Oven ON Condition ...
Page 52: ...Section 5 Wiring Diagrams 5 2 Pictorial Component Diagram ...
Page 54: ...Section 5 Wiring Diagrams 5 4 LD1 LD2 LD3 LD4 LD5 Control Board ...
