Disassembly And Reassembly - Samsung mw8490w Service Manual

4. Disassembly and Reassembly

4-1 Replacement of Magnetron, Motor Assembly and Lamp
Remove the magnetron including the shield case,
permanent magnet, choke coils and capacitors (all
of which are contained in one assembly).
1. Disconnect all lead wires from the magnetron
and lamp.
2. Remove the air cover.
3. Remove screws securing the magnetron to the
wave guide.
4. Take out the magnetron very carefully.
5. Remove tow screws from the back panel of fan
motor assembly.
6. Take out the fan motor assembly.
7. Remove the oven lamp by pulling out from hole
of air cover.
NOTE1: When removing the magnetron, make
sure that its antenna does not hit any
adjacent parts, or it may be damaged.
NOTE2: When replacing the magnetron, be sure to
remount the magnetron gasket in the
correct position and make sure the
gasket is in good condition.
4-2 Replacement of High Voltage Transformer
1. Discharge the high voltage capacitor.
2. Disconnect all the leads.
3. Remove the mounting bolts.
4. Reconnect the leads correctly and firmly.
There exists HIGH VOLTAGE ELECTRICITY with high current capabilities in the circuits of the HIGH VOLTAGE TRANSFORMER
secondary and filament terminals. It is extremely dangerous to work on or near these circuits with the oven energized.
DO NOT measure the voltage in the high voltage circuit including filament voltage of magnetron.
Samsung Electronics
Lamp
Cover Air
Magnetron
H. V. Trans
Never touch any circuit wiring with your hand nor with an
insulated tool during operation.
PRECAUTION
Thermo S/W
Fan Motor
H. V. Capacitor
PRECAUTION
Screw
4-1