DOWNLOAD Panasonic NN-ST250W / NN-ST250M / NN-ST250WZPE / NN-ST250MZPE Service Manual ↓ Size: 2.91 MB | Pages: 40 in PDF or view online for FREE

• DO NOT operate on a 2-wire extension cord during

repair and use.

• NEVER TOUCH any oven components or wiring during

operation.

• BEFORE TOUCHING any parts of the oven, always

remove the power plug from the outlet.

• For about 30 seconds after the oven stops, an electric

charge remains in the high voltage capacitor. When
replacing or checking, you must discharge the high
voltage capacitor by shorting across the two terminals
with an insulated screwdriver.

•

Remove your watches whenever working close to or

replacing the Magnetron.

• NEVER operate the oven with no load.
• NEVER injure the door seal and front plate of the oven

cavity.

• NEVER put iron tools on the magnetron.
• NEVER put anything into the latch hole and the

interlock switches area.

• Proper operation of the microwave oven requires that

the magnetron be assembled to the waveguide and
cavity. Never operate the magnetron unless it is
properly installed.

2-1

Unlike other appliances, the microwave oven is
high-voltage and high-current equipment.
Though it is free from danger in ordinary use,
extreme care should be taken during repair.

Personnel should not be exposed to the
microwave energy which may radiate from the
magnetron or other microwave generating
device if it is improperly used or connection.
All input and output microwave connections,
waveguide, flange and gasket must be secure
never operate the device without a microwave
energy absorbing load attached.
Never look into an open waveguide or antenna
while the device is energized.

ANTENNA

COOLING FIN

MAGNETRON
CHASSIS GROUND

FILAMENT
TERMINALS

MAGNETRON

GASKET

3-1

1. Empty the microwave oven and clean inside it with

a soft, damp cloth. Check for damage such as
misaligned door, damage around the door or dents
inside the cavity or on the exterior.

2. Put the oven on a counter, table, or shelf that is

strong enough to hold the oven and the food and
utensils you put in it. (The control panel side of the
oven is the heavy side. Use care when handling.)

3. Do not block the vent and the air intake openings.

Blocking vent or air intake openings can cause
damage to the oven and poor cooking results.
Make sure the microwave oven legs are in place to
ensure proper air flow.

4. The oven should not be installed in any area where

heat and steam are generated, because they may
damage the electronic or mechanical parts of the
unit.
Do not install the oven next to a conventional
surface unit or above a conventional wall oven.

5. Use microwave  oven in an ambient temperature

less than 104°F(40°C).

6. Place the microwave  oven on a sturdy and flat

surface at least 10 cm(4 inches) from the wall.

7. Place the microwave oven as far away as possible

from TV, RADIO, COMPUTER, etc., to prevent
interference.

This microwave oven is designed to be used in a fully
earthed condition.
It is imperative, therefore, to make sure it is properly
earthed before servicing

WARNING-
THIS APPLIANCE
MUST BE EARTHED

IMPORTANT

As the colors of the wires in the mains lead of this
appliance may not correspond with the colored
markings identifying the terminals in your plug,
proceed as follows.

The wire which is colored green-and-yellow must be
connected to the terminal in the plug which is marked
with the letter E or by the earth symbol (    ) or
colored green or green-and-yellow.

The wire which is colored blue must be connected to
the terminal in the plug which is marked with the letter
N or colored black.

The wire which is colored brown must be connected
to the terminal in the plug which is marked with the
letter L or colored red.

10cm

The wires in this mains lead are colored in
accordance with the following code:

4-1

(1)

(4)

(5)

(2)

(8)

(9)

(3)

(10)

(6)

(7)

(1) Display Window
(2) Microwave Power Levels
(3) Time Pads
(4) Auto Weight Reheat Programs
(5) Auto Weight Cook Programs
(6) Auto Weight Defrost Pad
(7) Timer / Clock Pad
(8) Weight Selection Pads
(9) Stop/Cancel Pad:

Before Cooking:
one press clears your instructions.
During Cooking:
one press temporarily stops the cooking
program. Another press cancels all your
instructions and the time of day will
appear in the display.

(10) Start Pad

*

The Design of your control panel may vary
from the panel displayed (depending on
colour), but the function of the pads are the
same.

When a pad is touched correctly a beep will be

the unit has not or cannot accept the instruction.

beep 5 times and ʻEndʼ will appear in the display.

heard. If a pad is touched and no beep is heard,

At the end of any complete program, the oven will

NN-ST250M/NN-ST250W 

Oven Front Plate 

Safety Door Lock System

Control Panel

Roller Ring

 

Glass Tray

See-Through oven window 

Door C

The following is a description of component functions
during oven operation.

NOTE: You can set 24 hour clock.

Touch the Stop/Cancel pad whenever you need to
cancel an entry or a function currently in use.
The display will either return to the last item entered
or to the clock. 

This oven has a CHILD LOCK feature 

• TO SET CHILD LOCK 

• Press start pad three times

L appear in the display.

•  TO CANCEL CHILD LOCK

• Press stop/cancel pad three times

L disappears.

4-2

Stop/

Cancel

Clock

Set the time

by pressing

Stop/

Cancel

Desired

defrost

Desired

 

Start

Stop/

Cancel

Desired

cooking time

Desired

cooking power

Start

2 STAGE

time pads

program

weight

Stop/

Cancel

Desired

Desired

 

Start

program

weight

reheat

 COOKING

Stop/

Cancel

Desired

cooking time

Desired

cooking power

Desired

cooking time

Desired

cooking power

Start

Clock