Panasonic NN-SB636B User manual

Microwave Oven
Model No.
© Panasonic Corporation 2015 Unauthorized
copying and distribution is a violation of law
Order No.
Specifications
Power Requirement
Power Output
Microwave Frequency
Magnetron
Timer
Outside Dimensions
Cavity Dimensions
Net Weight
Shipping weight
Specifications subject to change without notice.
Single phase, 3 wire grounded
2,450 MHz
2M248J
Volts~AC 60 Hz
0 ~ 99 min. and 50 sec.
120
1500 Watts (
1100 Watts full microwave power (IEC60705)
13.5 A)
NN-SB636B RUH
1.3 cu.ft
1
6
20
7
⁄”x 12
3
⁄ 8 ”x 16
1
⁄
8
”
13 3
13 ⁄ 16 ”x 9
13
⁄ 16 ”x 15 ⁄ 1 ” 6
35.3 lbs
39.7 lbs
Mexico
Black

This device is to be serviced only by properly qualified service personnel.
Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be
taken to avoid possible exposure to excessive microwave energy.
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
A) Do not operate or allow the oven to be operated with the door open.
B) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary; (1) interlock operation, (2) proper door closing, (3)
seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and
latches, (5) evidence of dropping or abuse.
C) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
integrity, and connections.
D) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation
and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual
before the oven is released to the owner.
E) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner.
SAFETY PRECAUTIONS
CAUTION
MICROWAVE RADIATION
DO NOT BECOME EXPOSED TO RADIATION FROM THE MICROWAVE GENERATOR
OR OTHER PARTS CONDUCTING MICROWAVE ENERGY.
WARNING 
Thisproductshouldbeservicedonlybytrainedqualifiedpersonnel.
Thisservicemanualcoversproductsforfollowingmarkets.
Whentroubleshootingorreplacingparts,pleaserefertothecountryidentificationsshownbelowforyour
applicableproductspecification.
……For

USA
ATH

(Page)
SAFETY PRECAUTIONS --------------------------------------------------------------------- Inside front cover
POWER LEVEL & ACCESSORIES
----------------------------------------------------------------------------- 1-1
CAUTIONS
-------------------------------------------------------------------------------------------------------------- 2-1
INSTALLATIONS
------------------------------------------------------------------------------------------------------ 3-1
OPERATING INSTRUCTIONS
- - --- - ------------------------------------------------ - - ---------------------------- 4-1
FEATURES ------------------------------------------------------------------------------------------------------------------------ 4-1
CONTROL PANEL
-------------------------------------------------------------------------------------------------------------- 4-1
OPERATING SEQUENCE
---------------------------------------------------------------------------------------------------- 4-2
SCHEMATIC DIAGRAM
------------------------------------------------------------------------------------------------------ 4-3
CIRCUIT DESCRIPTION
----------------------------------------------------------------------------------------------------- 4-4
SERVICE INFORMATION ------------------------------------------------------------------------------------------ 5-1
TOOLS AND MEASURING INSTRUMENTS --------------------------------------------------------------------------- 5-1
MICROWAVE LEAKAGE TEST
-------------------------------------------------------------------------------------------- 5-1
MEASUREMENT OF MICROWAVE POWER OUTPUT
----------------------------------------------------------- 5-4
DISASSEMBLY AND ADJUSTMENT
------------------------------------------------------------------------------------- 5-4
INTERLOCK CONTINUITY TEST
------------------------------------------------------------------------------------------ 5-8
COMPONENT TEST PROCEDURE
-------------------------------------------------------------------------------------- 5-9
TROUBLE SHOOTING
------------------------------------------------------------------------------------------------------ 5-13
CONTENTS
EXPLODED VIEW ----------------------------------------------------------------------------------------------------- 6-1
REPLACEMENT PARTS LIST
- - --- - ------------- - - ---- - - ----- - - ---- - - ----- - - ----------------- - - ----- - - ----------- 7-1
SCHEMATIC DIAGRAM OF P.C.B.
- - - - - -------------- - - ---- - - ----- - - ---- - - ----- - - ----------------- - - ----- - - ----- 8-1

1-1
POWER LEVEL & ACCESSORIES
This microwave oven is designed for household use only.
It is not recommended for commercial purposes.
DESCRIPTION
Microwave Power for Variable Cooking
Power level
ITEM
Control Complement
Accessories
Glass
gnirell RoR
Inside
High
Defrost
Medium
Med
Low
1100 Watts
750 Watts
550 Watts
300 Watts
150 Watts
Tray
Model/serial Number Location

• DO NOT operate on a 2-wire extension cord during
repair and use.
• Avoid conatct with oven compoments or wiring during
operation.
• Always remove the power plug form the outlet BEFORE
• An electric charge will remain in the high voltage capacitor
voltage capacitor by shorting across the two terminals
with an insulated screwdriver.
•
2-1
CAUTIONS
Unlike other appliances, the microwave oven is a
high-voltage and high-current device.
Though it is free from use,
extreme care should be taken while servcing the unit.
THE OVEN IS TO BE SERVICED ONLY
BY PROPERLY QUALIFIED SERVICE
PERSONNEL.
MICROWAVE RADIATION
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
danger during ordingary
coming into contact with any parts of the oven.
for about 30 seconds after the oven stops operating.
When checking or replacing components in the high
Remove metallic objects such as rings and watches
• NEVER operate the oven with out a load.
• NEVER damage the door seal and front plate of the
• NEVER place metal tools on the magnetron.
• NEVER insert anyting into the latch holes or the or
interlock switches area.
Proper operation of the microwave oven requires that the
magnetron be mounted to the waveguide and cavity. Never
operate the magnetron unless it is properly installed.
• Be sure that the magnetron gasket is properly installed
around the dome of the tube whenever installing the
magnetron.
whenever working close to or replacing the magnetron.
oven cavity.

INSTALLATION
3-1
INSTALLING
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
WARNING
THIS APPLIANCE
MUST BE GROUNDED
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 Eor 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
Nor colored black.
The wire which is colored brown must be connected
to the terminal in the plug which is marked with the
letter Lor colored red.
BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.
10cm
The wires in the line cord are colored in
accordance with the following code:
Green-and-yellow: Ground(Earth,E)
Blue: Neutral(N)
Brown: Live(L)
GROUNDING INSTRUCTIONS
grounded prior to servicing.
1. Empty the microwave oven and clean the inside 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. Place the oven on a counter, table, or shelf that is strong
enough to hold the oven along with food or containers that
may be placed in the unit. (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
the vent or air intake openings can cause damage to the
oven and may result in poor cooking results.
Make sure the microwave oven legs are in place to ensure
proper air flow.
4. Do not install the oven next to or above a conventional
surface unit or above a conventional wall oven as the heat or
steam produced by these units may damage the electronic or
mechanical parts of the unit.

4-1
OPERATING INSTRUCTIONS
FEATURES CONTROL PANEL
7
11
12 14
15
12
13
1 Ventilaciones de Aire Externas
2 Ventilaciones de Aire Internas
3 Sistema Cierre de Seguridad de la Puerta
4 Ventilaciones de Aire Externas
5 Panel de Control
6 Placa de Identicación
7 Plato giratorio de Cristal
8 Aro de rodillo
9 Película de barrera contra el
calor/vapor (no quitar )
10 Cubierta de la guía de
ondas (no quitar )
11 Botón para abrir la puerta
12 Etiqueta de advertencia
13 Etiqueta de Menú
14 Cable de suministro eléctrico
15 Enchufe del suministro eléctrico
16 Pantalla Indicadora
17 Botón de Palomitas (Ver página 10)
18 Botón Recalentamiento
Automático (Ver página12)
19 Botón Cocción Automática
(Ver página 12)
21
20 Botón de Potencia (Ver página 8)
22
26 Botones Numerícos
27 Botón Coción/Cronómetro
(Ver página 13)
29 Botón Pausa/Cancelar
Antes de cocción: Un toque
borra todas las instrucciones.
Durante cocción: un toque
detiene temporaralmente el
proceso. Otro toque cancela
todas las instrucciones, y la
hora del dia o dos puntos
aparecen en la pantalla.
el botón Pausa/Cancelar es
presionado una vez durante la
operación, el botón Encender
debe presionarse de nuevo
para reanudar el horno.
Bip:
Cuando una tecla es presionada
correctamente, se escuchará un
“bip”. Si una tecla es presionada y no
escucha un “bip”, signica que la
unidad no aceptó o no pudo aceptar
la instrucción. El horno hará 2 veces
“bip” entre las etapas programadas.
Al nal de cada programa
completado, el horno hará 5 veces
“bip”.
NOTA:
Si no se lleva a cabo ninguna
operación tras ajustar un programa
de cocina, el horno cancelará
automáticamente el programa de
cocina tras 6 minutos de inactividad.
La pantalla mostrará de nuevo la
hora o dos puntos.
23 Botón de 30 segs. automáticos.
24 Botón Más
25
28
30 Botón Encender
Después de programar
cocción , un toque permite al
horno funcionar. Si la puerta
está cerrada o
(Ver página 10)
Botón ( Menos
Ver página 10)
Botón Reloj (
Ver página 8)
Botón de Auto Descongelado
(Ver pagina 11)
Botón Porciónes/Peso (Ver página10)
Palomitas
(3 Opciones)
Potencia
(10 Niveles)
30 Seg
Automático
Cronómetro
Pausa/Cancelar Encender
Reloj
Más Menos
Porciones
/Peso
Auto
Descongelar
(lb/kg)
Cocción
Automática
(1-7)
Auto
Recalentar
(1- 4 porciones)
16
17
18
19
20
21
22
23
24
25
26
27
29
28
30
Palomitas
(3Opciones)
Potencia
(10Niveles)
30Seg
Automático
Cronómetro
Pausa/Cancelar Encender
Reloj
Más Menos
Porciones
/Peso
Auto
Descongelar
(lb/kg)
Cocción
Automática
(1-7)
Auto
Recalentar
(1-4 porciones)

OPERATING SEQUENCE
The following is a description of component functions
during oven operation.
1. SETTING THE CLOCK
NOTE: Clock is a 12-hour display.
•
Press twice.
Colon will blink
in the display window.
2. CANCEL FUNCTION
Touch the Stop/Reset 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
appear in the display.
• TO CANCEL CHILD LOCK
• Press stop/reset pad three times
disappears.
4-2
Stop/
Reset
Stop/
Reset
Stop/
Reset
Stop/
Reset
Timer/
Clock
Timer/
Clock
Set the time
by pressing
Select
the weight
of food
Start
Desired
cooking time
Desired
cooking power Start
3. MICROWAVE COOKING
time pads
Desired
menu
number
Desired
serving/
weight
Start
4. TURBO DEFROST
5. AUTO COOK
6. CHILD LOCK

SCHEMATIC DIAGRAM
4-3
A
n electric charge will remain in the high voltage capacito
for about 30 seconds after the oven stops operating. When
checking or replacing components in the high voltage circuit,
you must first discharge the high voltage capacitor by shorting
across the two terminals with an insulated screwdriver.
120V60Hz
160℃/95℃120℃/80℃
120V20A
2M248J
0.95μF

CIRCUIT DESCRIPTION
GENERAL DETAILS
• The low voltage transformer supplies the necessary
voltage to the micom controller when power cord is
plugged in.
• When the door is closed, the primary switch is ON, the
secondary switch is ON, and the monitor switch opens
(contact COM and NO).
WHEN SELECTING COOKING POWER
LEVEL AND TIME
• The micom controller memorizes the function you set.
• The time you set appears in the display window.
• Each indicator light turns on to indicate that the stage
has been set.
WHEN TOUCHING THE START PAD
• The coil of the relay is energized by the micom
controller.
• Power input is supplied to the high voltage transformer
through the fuse to the primary switch and relay 2.
• Turntable rotates.
• Cooking time starts counting down.
• 3.2 volts AC is generated from the filament winding of
the high voltage transformer. This 3.2 volts is applied to
the magnetron to heat the magnetron filament through
two noise-preventing choke coils.
• A high voltage of approximately 2100 volts AC is
generated in the secondary of the high voltage
transformer which is increased by the action of the high
voltage diode and charging of the high voltage
capacitor.
• The negative 4000 Volts DC is applied to the filament
of the magnetron.
WHEN THE OVEN IS SET AT ANY LEVEL
EXCEPT MAXIMUM.
• The micom controller controls the ON-OFF time of relay
2 by the applied signal to vary the average output
power of microwave oven as POWER LEVEL.
(refer to page 1-1)
WHEN THE DOOR IS OPENED DURING
COOKING
• Both the primary switch and relay 2 are cut off primary
winding voltage of the high voltage transformer.
• ON-OFF of relay 2 is coupled electrically with opening
and closing of the secondary switch.
• When the door is opened, the secondary switch is
opened and when the door is closed, the secondary
switch is closed.
• The cooking time stops counting down.
• Relay stops functioning.
• As the door is opened, if the contact of primary switch
and relay 2 and/or secondary switch fails to open, the
fuse opens due to the large current surge caused by
the monitor switch activation, which in turn stops
magnetron oscillation.
4-4
L
FUSE
TRANS-
FORMER
RELAY 2
MICOM CONTROLLER
SECONDARY
SWITCH
SWITCH
N
MONITOR
SWITCH
PRIMARY
MONITOR
SWITCH
L
FUSE
RELAY 2
MICOM CONTROLLER
SECONDARY
SWITCH
PRIMARY
SWITCH
N
• The fan motor rotates and cools the magnetron by
blowing the air (coming from the intake on the
• The air is also directed into the oven to exhaust the
vapor in the oven through the left side.
backplate).
TRANS-
FORMER