Samsung M1777 Service Manual page 7

4. Disassembly and Reassembly
4-1 Replacement of M agnetron, M otor 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 a screw securing air cover.
3. Remove the air cover.
4. Remove screws securing the magnetron to the wave guide.
5. Take out the magnetron very carefully.
6. Remove nuts from the back panel.
7. Take out the fan motor.
8. Remove the oven lamp by rotating to pull 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 wire.
3. Remove the mounting bolts.
4. Reconnect the leads correctly and firmly.
Samsung Electronics
PRECAUTION
Servicemen should remov their w atches w henever
w orking close to or replacing the magnetron.
PRECAUTION
There exists HIGH VOLTAGE ELECTRICITY w ith high
current capabilities in the circuits of the HIGH
VOLTAGE TRANSFORM ER secondary and filament
terminals. It is extremely dangerous to w ork on or
near these circuits w ith the oven energized.
DO NOT measure the voltage in the high voltage
circuit including filament voltage of magnetron.
4-1