Discharging the high voltage capacitors
WARNING
There is high voltage present with high current capabilities
in the circuits of the primary and secondary windings, choke
coil and heat sink of the inverter. 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 the filament voltage of the magnetron.
WARNING
Never touch any circuit wiring with your hand or with an
insulated tool during operation.
5.3. Confirm before repair
CAUTION
To prevent the water from invading the electric parts that can cause a
short circuit or electric shock:
1. Before repair or replacement of parts, ensure to remove the water
tank from microwave oven.
2. After removing the water tank, select the "drainage" function to
drain the water remaining in the water pipes and tubes into oven
cavity forcibly. (Operating method: keep pressing [Steam Defrost]
pad for more than 2 seconds). Then wipe up the oven cavity.
3. In case the Microwave Oven has no power, the technician should
have a dry cloth available in advance before disassembly. When
pulling out the water tube, elevate the front of the Microwave Oven
at least 1.5” to minimize the amount of water that leaks out. Wipe
up excess water throughly with the dry cloth.
WARNING
Before beginning repair work, make sure that there is no
water in microwave oven, otherwise the water might invade
the electric parts and that can cause a short circuit or
electric shock.
5.4. Part replacement
When troubleshooting any part or component is to be replaced,
always ensure that the power cord is unplugged from the wall
outlet.
5.5. When the 10A fuse is blown
due to the malfunction of the
short switch
WARNING
When the 10A 240V fuse is blown due to the malfunction of
the short switch, replace all of the components (primary
latch switch, short switch and power relay RY1).
1. This is mandatory. Refer to “measurements and
adjustments” for the location of these switches.
2. When replacing the fuse, confirm that it has the
appropriate rating.
3. When replacing faulty switches, be sure the mounting
tabs are not bent, broken or deficient in their ability to
hold the switches.
5.6. Avoid inserting nails, wire etc.
through any holes in the unit
during operation
Never insert a wire, nail or any other metal object through the
lamp holes on the cavity or any holes or gaps, because such
objects may work as an antenna and cause microwave
leakage.
5.7. Verification after repair
CAUTION
After repair or replacement of parts, make sure that all the water pipes
and tubes are properly connected, otherwise the water might invade
the electric parts and will cause a short circuit or electric shock.
1. After repair or replacement of parts, make sure that the
screws of the oven, etc. are neither loose or missing.
Microwave energy might leak if screws are not properly
tightened.
2. Make sure that all electrical connections are tight before
inserting the plug into the wall outlet.
3. Check for microwave energy leakage.
CAUTION OF MICROWAVE RADIATION LEAKAGE
USE CAUTION NOT TO BECOME EXPOSED TO
RADIATION FROM THE MICROWAVE MAGNETRON OR
OTHER PARTS CONDUCTING MICROWAVE ENERGY.
IMPORTANT NOTICE
1. The following components have potentials above 2000V
while the appliance is operated.
•
Magnetron
•
High voltage transformer (Located on inverter (U))
•
High voltage diodes (Located on inverter (U))
•
High voltage capacitors (Located on inverter (U))
Pay special attention to these areas.
2. When the appliance is operated with the door hinges or
magnetron installed incorrectly, the microwave leakage
can exceed more than 5mW/cm
2
. After repair or
exchange, it is very important to check if the magnetron
and the door hinges are correctly installed.
3. After repair or replacement of parts, make sure that all
the water pipes and tubes are properly connected,
otherwise the water might invade the electric parts and
will cause short circuit even result in electric shock.
5.8. Sharp edges
CAUTION
Please use caution when disassembling or reassembling
internal parts. Some exposed edges may be sharp to the
touch and can cause injury if not handled with care.
5.9. Hot surface
CAUTION
1. After using steam function, the oven cavity and steam
heater area becomes very hot.
2. After using bake function, the oven cavity and bake
heater area becomes very hot.
Therefore, extreme care should be taken during servicing.
12
NN-CS599S
Summary of Contents for NN-CS599S
Page 2: ...2 NN CS599S ...
Page 3: ...3 NN CS599S ...
Page 5: ...1 FEATURE CHART 2 CONTROL PANEL 5 NN CS599S ...
Page 6: ...3 SCHEMATIC DIAGRAM 6 NN CS599S ...
Page 32: ...10 EXPLODED VIEW AND PARTS LIST 10 1 EXPLODED VIEW 32 NN CS599S ...
Page 40: ...11 DIGITAL PROGRAMMER CIRCUIT 11 1 SCHEMATIC DIAGRAM 40 NN CS599S ...
Page 41: ...41 NN CS599S ...
