Panasonic Sonic Steamer NE-3280 User manual

©2001 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
NE-3280
NE-2180
NE-2180C
Microwave Oven
ORDER NO. MOD0108247C1
E10

1 CONTROL PANEL 4
2 OPERATION PROCEDURE 5
3 SCHEMATIC DIAGRAM NE-3280 (USA) 9
4 WIRING DIAGRAM NE-3280 (USA) 10
5 SCHEMATIC DIAGRAM NE-2180C (CANADA) 11
6 WIRING DIAGRAM NE-2180C (CANADA) 12
7 SCHEMATIC DIAGRAM NE-2180 (USA) 13
8 WIRING DIAGRAM NE-2180 (USA) 14
9 DESCRIPTION OF OPERATING SEQUENCE 15
10 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING
16
11 DISASSEMBLY AND PARTS REPLACEMENT 17
12 COMPONENT TEST PROCEDURE 21
13 MEASUREMENTS AND ADJUSTMENTS 23
14 PROCEDURE FOR MEASURING RADIATION LEAKAGE 24
15 TROUBLESHOOTING GUIDE 26
16 EXPODED VIEW AND PARTS LIST 28
17 PARTS LIST 30
18 DOOR ASSEMBLE 34
19 ESCUTCHEON BASE ASSEMBLE 35
20 PACKING AND ACCESSORIES 36
CONTENTS
Page Page
2
NE-3280 / NE-2180 / NE-2180C

21 WIRING MATERIAL 37
22 DIGITAL PROGRAMMER CIRCUIT 40
23 DIGITAL PROGRAMMER CIRCUIT 42
3
NE-3280 / NE-2180 / NE-2180C

1 CONTROL PANEL
4
NE-3280 / NE-2180 / NE-2180C

2 OPERATION PROCEDURE
5
NE-3280 / NE-2180 / NE-2180C

6
NE-3280 / NE-2180 / NE-2180C

7
NE-3280 / NE-2180 / NE-2180C

8
NE-3280 / NE-2180 / NE-2180C

3 SCHEMATIC DIAGRAM NE-3280 (USA)
9
NE-3280 / NE-2180 / NE-2180C

4 WIRING DIAGRAM NE-3280 (USA)
NOTE: When replacing, check the lead wire colour as shown.
10
NE-3280 / NE-2180 / NE-2180C

5 SCHEMATIC DIAGRAM NE-2180C (CANADA)
11
NE-3280 / NE-2180 / NE-2180C

6 WIRING DIAGRAM NE-2180C (CANADA)
NOTE: When replacing, check the lead wire colour as shown.
12
NE-3280 / NE-2180 / NE-2180C

7 SCHEMATIC DIAGRAM NE-2180 (USA)
13
NE-3280 / NE-2180 / NE-2180C

8 WIRING DIAGRAM NE-2180 (USA)
NOTE: When replacing, check the lead wire colour as shown.
14
NE-3280 / NE-2180 / NE-2180C

Variable power cooking control
The coil of power relays are energized intermittently by the
digital programmer circuit, when the oven is set at any power
selection except for High power position. The digital
programmer circuit controls the ON-OFF time of the power
relays contacts in order to vary the output power of the
microwave oven. The relation between indications on the
control panel and the output power of the microwave oven is as
9.1. Defrost control
When defrost power and defrosting time is selected and Start
pad is touched:
1.The digital programmer circuit (DPC) divides the total
defrosting time into 8 equal periods, consisting of four
defrosting periods, each followed by a standing period.
(See figure)
2.During defrosting power periods, power relay ON-OFF time
is controlled at Low power mode by DPC.
3.During Standing periods, power relay is always open
shown in table.
NOTE:
ON-OFF time of power relays are changed by digital
programmer circuit when remaining cooking time or
selected cooking time are within 8 minutes at MED,
LOW and Defrost cooking mode.
resulting in no microwave power.
NOTE:
Defrost time selected is converted into seconds by the
DPC but display will show selected time in minutes and
seconds as programmed. The total number of seconds
is divided into 8 time periods. The remainder (seconds
not equally divisible by 8) are added to the last standing
time period.
9 DESCRIPTION OF OPERATING SEQUENCE
15
NE-3280 / NE-2180 / NE-2180C

Unlike many other appliances, the microwave oven is high-
voltage, high-current equipment. Though it is free from danger
in ordinary use, extreme care should be taken during repair.
CAUTION
Servicemen should remove their watches whenever working close to or
replacing the magnetron.
10.1. Check the grounding
Do not operate on a 2-wire extension cord. The microwave
oven is designed to be used when grounded. It is imperative,
therefore, to make sure it is grounded properly before
beginning repair work.
10.2. Warning about the electric
charge in the high voltage
capacitor (
Figure).
For about 30 seconds after the oven is turned off, an electric
charge remains in the high voltage capacitor. When replacing
or checking parts, remove the power plug from the outlet and
short the terminal of the high voltage capacitor (terminal of lead
wire from diode) to chassis ground with and insulated handle
screwdriver or insulated jumper lead wire to discharge.
WARNING
There is high-voltage present, with high-current capabilities in the
circuits of the high voltage winding and filament winding of the high
voltage transformer. It is extremely dangerous to work on or near these
circuits with oven energized.
DO NOT measure the voltage in the high voltage circuit including
filament voltage of magnetron.
WARNING
Never touch any circuit wiring with your hand nor with an insulated tool
during operation.
10.3. When parts must be replaced,
remove the power plug from
the outlet.
10.4. When the 15 Amp. (NE-
2180/NE-2180C) or 20 Amp.
(NE-3280) fuse is blown due to
the operation of interlock
monitor, replace the necessary
components according to the
following table.
10.5. 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 other holes or gaps, because
such objects may work as an antenna and cause microwave
leakage.
10 CAUTIONS TO BE OBSERVED WHEN
TROUBLESHOOTING
16
NE-3280 / NE-2180 / NE-2180C

10.6. Confirm after repair
1.After repair or replacement of parts, make sure that the
screws of the oven, etc. are neither loose nor missing.
CAUTION
Servicemen should remove their watches whenever working close to or
replacing the magnetron.
11.1. Magnetrons (Upper and
Lower)
Upper magnetrons (Right and Left)
1.Discharge electric charge remaining on the high voltage
capacitors.
2.Remove the entire rear panel by removing screws as shown
in figure.
3.Disconnect all lead wires from magnetron and thermal
cutout.
4.Remove the 4 screws holding magnetron.
5.Remove 2 screws holding thermal cutout.
6.Remove the mounting bracket from magnetron and install it
on the new magnetron.
Lower magnetrons (Right and Left)
1.Discharge electric charge remaining on the high voltage
capacitors.
2.Remove the entire rear panel by removing screws as shown
in figure.
3.Disconnect all lead wires from magnetron and thermal
cutout.
4.Remove the 4 screws holding magnetron.
5.Remove 2 screws holding thermal cutout.
6.Remove the air guide from magnetron and install it on the
new magnetron.
NOTE:
To prevent microwave leakage, tighten mounting
screws properly making sure there is no gap between
the waveguide and the magnetron.
CAUTION
When connecting 2 filament lead wires to the magnetron terminals, be
sure to connect the lead wires in the correct position. The lead wire
with blue connector should be connected to “FA terminal” and white
one should be connected to “F terminal”. (See Figure)
2.Make sure that all electrical connections are tight before
inserting the plug into the wall outlet.
3.Check for microwave energy leakage. (Refer to procedure
for measuring microwave energy leakage.)
11 DISASSEMBLY AND PARTS REPLACEMENT
17
NE-3280 / NE-2180 / NE-2180C

11.2. Digital programmer circuit
board
1.Remove grounding screw for membrane switch and D.P.C.
ground.
2.Remove 2 screws holding control panel assembly to detach
it from main unit then remove connectors.
3.Remove 2 screws holding the D.P.C. board and remove the
board by freeing catch hooks.
NOTE:
Please use care in handling the power supply P.C.B.
and D.P.C. board to avoid damage.
11.3. Low voltage transformer
and/or power relays
NOTE:
Be sure to ground any static electric charge built up on
your body before handling the DPC.
1.Using solder wick or a desoldering tool and 30W soldering
iron, carefully remove all solder from the terminal pins of the
low voltage transformer and/or power relays.
NOTE:
Do not use a soldering iron or desoldering tool of
more than 30 watts on DPC contacts.
2.With all the terminal pins cleaned and separated from DPC
contacts, remove the defective transformer/power relays
and install new transformer/power relays making sure all
terminal pins are inserted completely. Resolder all terminal
contacts carefully.
11.4. Disassembly of door assembly
1.Detach the door spring ends from right and left door arms.
2.Remove the arm lever right and left by removing 2 screws
each on both sides.
3.Remove the sashes right and left by removing 1 screw each
on both sides.
4.By holding the door assembly, remove the right and left
sides door hinge pins. The door assembly is now free from
the oven.
5.Remove 3 screws holding the door A.
6.Remove the door C by using a flat screwdriver as figure.
7.Remove 4 screws holding door handle.
8.Separate door A and door E.
9.Remove the door arms by removing 1 pin each on both
sides.
18
NE-3280 / NE-2180 / NE-2180C

11.5. Upper antenna (Right and Left)
Upper antenna (Right and Left)
1.Remove 8 plastic clips holding ceiling plate and exhaust
guides by using flat screwdriver or the like.
2.Remove 2 screws holding upper antenna assy by inserting
screwdriver through the opening on the antenna as shown
in figure.
11.6. Lower antenna (Right and
Left)
Lower antenna (Right and Left)
1.To remove the floor shelf, insert a screwdriver through the
openings on the right and left sides of the oven cavity and
carefully lift the floor shelf as shown in figure.
2.Remove 2 screws holding lower antenna assy by inserting
screwdriver through the opening on the antenna as shown
in figure.
19
NE-3280 / NE-2180 / NE-2180C

11.7. Replacement of temperature
sensor (Thermal protector)
1.Cut 2 lead wires at the top of sensor terminals.
2.Remove 2 screws holding temp sensor and replace with
new one.
3.Solder the lead wires securely to the sensor terminals.
11.8. Replacement of antenna
motors (upper and lower)
1.The upper antenna motor may be removed by
disconnecting the lead wire connectors and removing its 2
mounting screws.
2.To remove the lower antenna motor, carefully place the unit
on its left side.
3.Remove the motor cover by removing 2 screws and follow
same procedure as for upper antenna.
CAUTION
There are two types of antenna motors. Therefore please replace with
correct one as showing below.
Upper
Antenna
Motor
PART NO.:
ANE61446030AP
(RATED: 120V)
Lower
Antenna
Motor
PART NO.:
A6144-3280
(RATED: 120V)
11.9. Program, Beep and Program
Lock switches board.
(P.C.Board F assy)
1.Remove air filters.
2.Place the unit on its left side carefully.
3.Peel off panel B.
4.Remove 1 screw holding cover. (Figure)
5.Remove 2 screws holding switch assy.
6.Remove connector and remove 2 screws holding switch
board.
11.10. Voltage selection
(208V→
→→
→230V)
1.Remove 1 screw holding voltage selection connector cover.
2.Plug the connector out from white (208V) socket and plug
the connector into the black (230V) socket.
20
NE-3280 / NE-2180 / NE-2180C