Sharp Microwave Oven R 8580 Users Manual Unknown

r-8580 to the manual b9c59583-101f-4c47-8afd-56fc57e3c830

2015-01-23

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SHARP

SERVICE MANUAL
S9706R8580J//

CONVECTION
MICROWAVE

TAME

OVEN

CONTENTS

Page
PRECAUTIONS
..........................................................................................................
INSIDE FRONT COVER
FOREWORD .......................................................................................................................................................
I
THUMB INDEX ..................................................................................................................................................
I
PRODUCT DESCRlPTlON
...............................................................................................................................
2
OPERATION .......................................................................................................................................................
4
SERVlClNG
.....................................................................................................................................................
11
TOUCH CONTROL PANEL ASSEMBLY
.....................................................................................................
22
COMPONENT
REPLACEMENT AND ADJUSTMENT
PROCEDURE .....................................................
30
MICROWAVE
MEASUREMENT
PROCEDURE ..........................................................................................
35
PICTORIAL DIAGRAM
..................................................................................................................................
36
CONTROL PANEL CiRCUlT .........................................................................................................................
37
PRlNTED WIRING BOARD ..........................................................................................................................
38
PARTS LIST ....................................................................................................................................................
39
PACKING AND ACCESSORIES
...................................................................................................................
47

SHARPCORPORATION

R -8680

SERVICE MANUAL

SHARP
CONVECTION

PRODUCT

MICROWAVE

OVEN

R-8580

FOREWORD
This Manual has been prepared to provide Sharp Corp. Service
Personnel with complete Operation and Service Information for
the SHARP CONVECTION MICROWAVE
oven, R-8580.

It is recommended
that service personnel carefully
entire text of this manual so they will be qualified
satisfactory customer service.

study the
to render

Check interlock switches and door seal carefully. Special attention should be given to avoid electrical shock and microwave
radiation hazard.
(RD36102U)

CAUTION
MICROWAVE
RADIATION
Personnel should not ,be exposed to the microwave
energy
which ‘may radiate from the magnetron
or other microwave
generating
devices if it is improperly
used or connected.
All
input and output microwave
connections,
waveguides,flanges
and gaskets must be secured. Never operate the device without
a microwave energy absorbing load attached.
Never look into
an open waveguide or antenna while the device is energized.
Note( Parts List)

: The parts marked
more than 25OV.

,,+I’ are used in voltage
(RD36202U)

SHARPCORPORATK)N
OSAKA, JAPAN
(RD37201

DESCRIPTION

R-8580

PRODUCT

DESCRIPTION

SPECIFICATION
DESCRIPTION

ITEM
Power Requirements

240 Volts
50 Hertz
Single phase, 3 wire earthed

Power Consumption

14OOW (Microwave)
1600W (Convection)

Power Output

700 watts normal of RF microwave
Operating frequency of 2450M Hz

Convection

1.500 Watts

Heater Power Output

Width 627mm
Height 407mm
Depth 500mm

Case Dimensions

Cooking

Control

Cavity

Dimensions

Complement

Set Weight

energy (2 liter water load)

Width 395mm
Height 253mm
Depth 422mm
Touch Control System
Clock( I:00 - 12:59 )
Timer (0 - 99 min. 99sec. )
Microwave
Power for Variable Cooking
Repetition Rate;
HIGH
..... ... ... . .... ...... ... ...... Full power throughout
approx.
.. .... ....*.................................
MED HIGH
approx.
.....*............................,.,..................
MED
. .... ... ...... ... ... .. approx.
MED LOW (DEFROST)
LOW ,......,............*.... .... ............ . ... ......... . approx.
No power throughout
.,.....*......................
HOLD
Convection Temperature Contro Ii’Range;
40 “C - 250 “C
AUTO START COOKING
INSTANT COOKING
EASY DEFROST COOKING
CONVECTION COOKING
SENSOR COOKING
AUTO MATIC MIX COOKING
COMPU COOKING
Approx.

31 .O kg

the
70%
50%
30%
10%
the

cooking time
of Full Power
of Full Power
of Full Power
of Full Power
cooking time

R-8580

Auto-TouchTM Control Panel
Touch

to select

sensor

cook

Touch

to select

Compu

Cook

mode

,&&:::C::P:
123 4 567690-

Fresh vegetables
Frozen vegetables
Baked potatoes
Frozen dinners
Bacon
Chicken preces
Fish fillets
Rice 8 Pasta
Cake
Reheat

.EASY DEFROST PAD
Touch to defrost meat
weight
only

beef/lamb
1 -Roast
2 - Roast pork
3 - Roast chrcken
4 - Roast turkey
dmner
5 -Roast
6 - Mixed grill
chicken
7 -Grilled
6 - Bread loaves
layers
9 -Cake
0 - Biscuits

mode

by entering

INSTANT
COOK PAD
Touch once to cook for 1 minute at HIGH
increase by 1 minute mult :iples each time
this pad is touched
during HIGH/VARIABLE
cooking.

’

NUMBER AND TEMPERATURE
PADS
Touch to enter cooking times, clock time,
convection
temperature
or to select the
Sensor or Compu Cook categories.
CONVECTION
COOKING
FUNCTION
Touch to cook for each function

I 6

i 7

II4
I

TIMER/HOLD
PAD
Touch to set minute

/
-AUTO

Touch
TIMER
HOLD

AUTO START
CLOCK

PADS

VARIABLE
COOKING CONTROL
PADS
Touch to select microwave
power setting.
If
not touched,
HIGH is automatically
selected.
Touch to select food doneness
setting for
Compu Cook. If not touched,
Med Done is
automatically
selected.

180°C

200%

START/CLOCK
to set clock

timer

or HOLD

PAD
or auto

start

function

time

,---STOP/CLEAR
PAD
Touch to erase during programming.
Touch once to stop operation
of oven during
cooking;, touch twice to cancel cooking

Touch

to start

oven

after

setting

programme.

OPERATION
DESCRIPTION
The following
is a description
during oven operation.

of component

OF OPERATING

functions
(RD71101

OFF CONDITION
activates
both
door
interlock
Closing
the door
switches:
upper latch switch, lower latch switch and
(In this condition,
the monitor switch
stop switch.
contacts are opened.)
When oven is plugged in, 240 volts A.C. is supplied to
the relay unit. (Figure O-l).
’
1. The display will show flashing “88:88”.
To set any program or set the clock;- you must first
touch the STOP/CLEAR
pad. The display will clear,
and I:00 will appear and count up every minute.
Note: When the door is opened, the oven lamp comes
2. A si;al
is input to the control unit, energizing the
coil of shut-off relay (RY6).
RY6 contacts close, completing
a circuit to the
damper motor.
The damper motor now operates moving the damper
to the open position, thereby closing the contacts
of the damper switch inputs a signal to the control
unit.
The coil of relay RY6 is de-energized,
opening its
contacts, thereby turning off the damper motor.
(RD71207U)

COOKING

CONDITION

HIGH COOKING
Program desired cooking time and Variable Cooking
Control by touching the NUMBER pads and the HIGH
pad of the Variable Cooking Control. When the START
pad is touched, the following
operations occur:
1. The contacts of relays are closed and components
connected to the relays are turned on as follows.
(For details, refer to Figure O-2)
RELAY

CONNECTED

COMPONENTS

RY-1

power transformer

RY-2

oven lamp/turntable

RY-3

convection

motor

RY-4

convection

heater

RY-5

fan motor

RY-6

damper motor

motor

2. 240 volts A.C. is supplied to the primary winding
of the power transformer and is converted to about
3.3 volts A.C. output on the filament winding,
and
approximately
2043 volts A.C. on the high voltage
winding.
voltage heats the magnetron
3. The filament winding
filament and the H.V. winding voltage is sent to a
voltage doubler circuit.
4. The microwave energy produced by the magnetron
is channeled through the waveguide into the cavity
feed-box, and then into the cavity where the food
is placed to be cooked.

SEQUENCE

of the cooking time, the power
5. Upon completion
transformer, oven lamp, etc. are turned off, and the
generation of microwave
energy is stopped.
The
oven will revert to the OFF condition.
6. When the door is opened during a cook cycle,
monitor switch,
upper latch switch,
lower latch
switch and stop switch.
are activated with the following results. The circuits to the turntable motor,
the cooling fan motor, and the high voltage components are deenergized, the oven lamp remains on,
and the digital readout displays the time still remaining
in the cook cycle when the door was
opened.
monitoring
the
7 . The monitor switch is electrically
operation of the upper latch switch and is mechanically associated with the door so that it will function in the following
sequence.
(1) When the door opens from a closed position,
the upper latch switch and lower latch switch
open their contacts,
and then the monitor
switch contacts close.
(2) When the door is closed from the open position, the monitor switch
contacts first open,
and then the contacts of the upper latch switch
and lower latch switch close.
If the common and normal open contacts of upper
latch switch fail with their contacts closed when the
door is opened, the closing
of the monitor switch
contacts will form a short circuit through the fuse and
upper latch switch, causing the monitor fuse to blow.
MED HIGH, MED, MED LOW (DEFROST),
LOW,
HOLD COOKING
When Variable Cooking Power is programed, the 240
volts A.C. is supplied
to the power
transformer
intermittently
through
the contacts
of relay( RY-2)
which is operated by the control unit within a 32 second time base. Microwave
power operation is as follows:
VARI-MODE

ON TIME

OFF TIME

HIGH
(100% power)

sec.

0 sec.

MED HIGH
(approx. 70% power)

sec.

8 sec.

MED
(approx.

18 sec.

14 sec.

12 sec.

20 sec.

6 sec.

26 sec.

0 sec.

32 sec.

50% power)

MED LOW (DEFROST)
(approx. 30% power)
LOW
(approx.

10% power)

HOLD
(0% power)

Note: The ON/OFF time ratio does not correspond
with the percentage of microwave
power, because approx. 2 seconds are needed for heating
of the magnetron filament.
(RD71401

R -8580

CONVECTION

COOKING

CONDITION

PREHEATING
CONDITION
Program desired convection
temperature by touching
the CONVECTION pad and the temp. pad.
When the START pad is touched, the following
operations occur:
1. The coil of shut-off relays (RY2, RY3 and RY5) are
energized,
the oven lamp, cooling
fan motor,
turntable motor and convection
motor are turned
2.

y:k coil of relay (RY6) is energized by the CPU
unit, The damper is moved to the closed position,
opening the damper switch contacts.
The opening of the damper switch contacts sends
a signal to the LSI on the CPU unit de-energizing
the relay (RY6) and opening
the circuit to the
damper motor.
The coil of heater relay (RY4) is energized by the
CPU unit and the main supply voltage is added to
the convection
heater.
When the oven temperature reaches the selected
preheat temperature, the following
operations occur:
4-l.
The heater relay (RY4) is de-energized
by
the
CPU
unit
temperature
circuit
and
thermistor, opening the circuit to the convection heater.
4-2.
The oven will continue
to function
for 15
minutes, turning
the convection
heater on
and off, as needed to maintain the selected
preheat temperature.
The oven will shut-down
completely
after
15 minutes.

CONVECTION
COOKING
CONDITION
When the preheat temperature is reached, a beep signal
will sound indicating that the holding temperature has
been reached in the oven cavity. Open the door and
place the food to be cooked in the oven.
Program desired cooking time and convection temperature by touching
the NUMBER pad, CONVECTION
pad and Temperature pad.
When the START pad is touched, the following
operations occur:
1. The numbers of the digital readout. start the count
down to zero.
2. The oven lamp, turntable motor, cooling fan motor
and convection
motor are energized.
3. Heater relay (RY4) is energized (if the cavity temperature is lower than the selected temperature)
and the main supply voltage is applied to the convection heater to return to the selected cooking
temperature.
4. Upon completion
of the cooking time, the audible
signal will sound, and oven lamp, turntable motor,
cooling
fan motor and convection
motor are
de-energized.
At the end of the convection
cycle,
if the cavity air temperature is above 118 OC., the
circuit to RY5 will be maintained (by the thermistor
circuit) to continue
operation of the cooling fan
motor until the temperature drops below 118 OC.,
at which time the relay will be de-energized, turning off the fan motor. Relay RY3 will however,
open as soon as the convection
cycle has ended,
turning off the convection
fan motor.This will now
cool and allow the damper door to open.

At the end of the convection
cook cycle,
relay (RY6) is energized turning
on- the
motor. The damper is returned to the open
closing the damper switch contacts which
signal to the control unit, de-energizing
relay (RY6).

AUTOMATIC

MIX COOKING

shut-off
damper
position,
send a
shut-off

CONDITION

Program desired cooking
time and temperature
by
touching
the number pads and the LOW MIX/BAKE
or HIGH MIX/ROAST
pad
When the START pad is touched, the following
operations occur:
1. The numbers of the digital readout start the count
down to zero.
2. The shut-off relay (RY2, RY3 and RY5) are energized, turning on the oven lamp, turntable motor,
and cooling fan motor.
3. The shut-off relay (RY6) is energized.
The damper door is closed from the open position.
4. The heater relay (RY4) is energized, adding the
mains supply voltage to the convection
heater.
5. Now, the oven is in the convection
cooking condition.
6. When the oven temperature
reaches the selected
temperature, the following
operations occur:
6-l.
The power supply voltages is added to the
convection
heater and power transformer alternately.
6-2. The convection
heater operates through the
heater relay (RY4) contacts and the power
transformer operates through the cook relay
(RYI ) contacts.
6-3. These are operated by the CPU unit to supply alternately within a 32 second time base,
convection
heat and microwave energy.
The relationship
between the convection
wave power operations are as follows.

and micro-

Note: The ON and OFF time ratio does not correspond
with the percentage of microwave
power, because approx. 2 seconds are needed for heating
of the magnetron filament.

MICROWAVE POWER
- Appmx. 10%

‘ON

CONVECTION
TEMPERATURE
- leo°C

t
1

I
I

MICROWAVE POWER
- A6wrcuc.
30%

ICONVECJ

OFF
I

CONVECTION
TEMPERATURE
-200%

&gjggg&
32~
HIGH MIX
-ROAST

R-8580

Note: During alternate Microwave/Convection
operation, the convection
heater is energized only if
the cavity temperature drops below the set temperature.

2.
3.

SENSOR COOKING

CONDITION

Using the SENSOR COOK function,
the foods are
cooked without figuring time, power level or quantity.
When the oven senses enough steam from the food, it
relays the information to its microprocessor
which will
calculate the remaining cooking time and power level
needed for best results.
When the food is cooked, water vapor is developed.
The sensor “senses” the vapor and its resistance increases gradually.
When the resistance reaches the
value set according to the menu, supplementary
cooking is started.
The time of supplementary
cooking is’.determined
by
experiment with each food category and inputted into
the LSI.
An example of how sensor works:

Select desired Sensor setting.
Touch START pad.
The coil of shut-off relays(RY2,RY5)
are energized,
the oven lamp and cooling fan motor are turned
on, but the power transformer is not turned on,
After about 16 seconds, the cook relay (RYI)
is
energized. The power transformer
is turned on,
microwave
energy is produced and first stage is
started.
The 16 seconds is the cooling time required to remove any vapor from the oven cavity and sensor.
NOTE: During this first stage, do not open the door
or touch STOP/CLEAR
pad.
When the sensor detects the vapor emitted from the
food, the display switches over to the remaining
cooking time and the timer counts down to zero.
At this time, the door may be opened to stir food,
turn it or season, etc.
When the timer reaches zero, an audible signal
sounds.
The shut-off
relay and cook relay are
de-energized
and the power transformer,
oven
lamp, etc. are turned off,
Opening the door or touching
the STOP/CLEAR
pad, the time of day will reappear on the display
and the oven will revert to an OFF condition.

COMPU
1.

Broccoli at room temperature.
Vapor is emitted very slowly.

Heat broccoli.
Moisture and humidity
is emitted
rapidly. You can smell the aroma as it cooks.

Sensor detects moisture and humidity
lates cooking time and variable power.

and calcu-

Cooking Sequence.
1. Touch SENSOR COOK pad.
NOTE:The oven should not be operated on SENSOR COOK immediately
after plugging
in
the unit. Wait five minutes before cooking
on SENSOR COOK.

COOK

COMPU COOK will automatically
compute the oven
temperature, microwave
power and cooking time for
baking, roasting and broiling.
Set the desired program by touching
the COMPU
COOK pad, and number pad.
Enter the weight by touching the Number pads
When the START pad is touched, the following
operations occur:
1. The COOK indicator will light and the Convection
Fan Symbol will rotate.
2. The cooking time will appear on the display and
start counting down to zero.
The cooking
time is adjusted automatically
according to the weight of the food.
3. The shut-off relays (RY2, RY3, RY4 and RY5) are
energized, turning
on the oven lamp, turntable
motor, cooling fan motor and convection
motor.
The power supply voltage is added to the convection heater.
4. Now, the oven is in the convection
cooking mode.
5. When the oven temperature has reached the programmed convection
temperature, the oven goes
into the programmed cooking mode.
6. At the end of the COMPU COOK cycle, the damper
is returned to the open position and the oven will
go to the off condition.
The cooling fan will remain on until the oven has
cooled.

EASY DEFROST

COOKING

The EASY DEFROST key is a special function
key to
defrost meats and poultry faster and better.
EASY DEFROST key has 4 defrost stages.
EASY DEFROST automatically
defrosts roast beef, etc.
When EASY DEFROST is selected and the food weight
is entered by using the number pads, the oven will
cook according to the special cooking sequence.

240V-50Hz
G-4

MBA

MONITOR
OVEN

RESISTOR

O.B/2OW

MON,TOR

TEMP.
FUSE
142’C

SW,TCH

MONITOR

RESISTOR

D.B/2DW

MONITOR

TEMP.
FUSE
142’C

SWITCH

LAMP

OVEN

LAMP

FAN MOTOR
AC CORD CONNECTION
BRN
BROWN
BLU

: BLUE

G-Y

GREEN AND
YELLOW STRIPE
: SECTIONAL
AREA
OF l.Omm’
MIN.

I17

I i

AC CORD CONNECTION
RELAY-UNIT
-______

A-3

BRN

BROWN

BLU

BLUE

G-Y

GREEN AND
YELLOW STRIPE

/I7

SECTIONAL
OF l.Omm’

RELAY-UNIT
-_-

AREA
MIN

UPPER
LATCH
SWITCH

LOWER
LATCH
SWITCH

I
LOWER
I ATI
SWITCH

-. -. .

RWc
l-6
1

^-^^

UPPER
LATCH
SWITCH

+A-7

A-5

SENSOR COOKING

A
RV6

NOTE
1

CONDITION

1 DOOR CLOSED
2 ‘SENSOR COOK”
PAD TOUCHED
3 START’ PAD

DOOR CLOSE0

HIGH COOKING
DAMPER

MOTOR

TURNTABLE

CONVECTION

;

POWER

1 DOOR CLOSED
2 COOKING TIME
PROGRAMMED
3 VARIABLE COOKING

MOTOR

CONVECTION%EATER

TRANSFORMER

HEATER

POWER

MAGNETRON

A
MAGNETRON
RECTIFIER

HIGH VOLTAGE
RECTIFIER

Figure O-l. Oven Schematic-OFF

TRANSFORMER

HIGH VOLTAGE
RECTIFIER

Condition

Figure O-2. Oven Schematic-High

and Sensor Cooking Condition

R-8580

240V-50Hz

MONITOR

RESISTOR

0.8/20W

MONITOR

TEMP.
FUSE
142°C

SWITCH

a//o
OVEN

LAMP

FAN MOTOR
I
AC CORD

CONNECTION

BRN

: BROWN

BLU

: BLUE

G-Y

: GREEN

AND

YELLOW
117

: SECTIONAL
OF l.Omm’

STRIPE
AREA
MIN.
UPPER
LATCH
SWITCH

LOWER
LATCH
SWITCH

SCHEMATIC

NOTE: CONDITION
OF OVEN
1. DOOR CLOSED
2. CONVECTION PAD
TOUCHED
3. DESIRED TEMP. PAD
TOUCHED
4. START PAD TOUCHED
B

CON”ECTlON%ATER

POWER

1
RECTIFIER

TRANSFORMER

CAPACITOR
1.13/i
AC2200V

4
MAGNETRON

L
i
HIGH VOLTAGE
RECTIFIER

Figure O-3. Oven Schematic-Convection

Cooking Condition

R -8580

DESCRIPTION

AND FUNCTION

THERMISTOR
The thermistor
is a negative temperature
coefficient
type. The temperature
in the oven cavity is detected
through the resistance of the thermistor, and then the
CPU unit causes the heater relay to operate, thus the
current to the convection
heater is turned ON/OFF.
OVEN THERMAL
CUT-OUT
The oven thermal cut-out located on the bottom side
of the thermal protection
plate is designed to prevent
damage to the convection
heater unit if an overheated
condition develops in the tube due to cooling fan failure, obstructed air ducts, dirty or blocked air intake, etc.
Under normal operation, the oven thermal cut-out remains closed.
However, when abnormally
high temperatures are reached within the heater unit, the oven
thermal cut-out
will open, causing the oven to shut
down.
When the oven has cooled temperature,
the oven
thermal cut-out closes.
MONITOR
SWITCH
The monitor switch is mounted on the upper latch
hook. It is activated (the contacts opened) by the upper latch head when the door is closed. The switch is
intended to render the oven inoperative
by means of
blowning
the fuse when the contacts of the common
and normal open contacts of upper latch switch fail to
open when the door is opened.
Functions:
1. When the door is opened, the monitor switch contacts close (to the ON condition)
due to their being
normally closed. At this time the the common and
normal open contacts of upper latch switch are in
the OFF condition
(contacts
open) due to their
being normally open contacts switch.
2. As the door goes to a closed position, the monitor
switch
contacts
are first opened and then the
common and normal open contacts of upper latch
switch close. (On opening the door, each of these
switches operate inversely.)
and the
3. If the door is opened during cooking,
common and normal open contacts of upper latch
switch fail to open, the monitor fuse blows simultaneously with closing of the monitor switch contacts.

OF COMPONENTS

CAUTION:BEFORE
REPLACING
A BLOWN
FUSE
TEST THE UPPER LATCH SWITCH AND
MONITOR
SWITCH
PROPER
FOR
OPERATION.(REFER
TO CHAPTER “TEST
PROCEDURE”).
AFTER REPLACING FUSE ALSO REPLACE
MONITOR SWITCH.
STOP SWITCH
The stop switch is activated by the lower latch head.
When the door is opened while the oven is in cook
cycle, the stop switch contacts open to de-energize the
relay(RY-l,RY-2,RY-3,RY-4,RY-5).
Then the cook cycle is stopped.
UPPER AND LOWER LATCH SWITCHES
The lower latch switch is mounted in the lower latch
hook and the upper latch switch is mounted in the
upper latch hook.
They are activated by the latch
heads on the door.
When the door is opened, the
switches interrupt the’crrcuit to all components except
CPU unit and relay unit and oven lamp. A cook cycle
cannot take place until the door is firmly closed thereby
activating both interlock switches.
P
’
A

Figure D-l. Upper
Switch,
Monitor

UPPER
LATCH
HOOK

Latch Switch,
Lower Latch
Switch and Stop Switch

R-8580

CONVECTION
The convection
It
oven cavity.
convection
fan.
force-circulated

HEATER
heater is located at the left side of the
is intended to heat air driven by the
The heated air is kept in the oven and
and reheated by the convection
heater.

Microwave
Cooking:
Damper is in the open position, because a portion of
cooling air is channeled through the cavity to remove
steam and vapors given off from the heating foods.
It is then exhausted at the top of the oven cavity into
a condensation
compartment.

CONVECTION
COOKING
SYSTEM
This oven is designed with a hot air heating system
where food is not directly heated by the convection
heater, but is heated by forced circulation
of the hot
air produced by the convection
heater.
The air heated by the convection
heater is circulated
through the convection
passage provided on the outer
casing of the oven cavity by means of the convection
fan which is driven by the convection
motor.
It then
enters the inside of the oven through the vent holes
provided on the left side of the oven. Next,the hot air
heats the food on the turntable and leaves the oven
cavity through the vent in the oven cavity left side wall.
Without leaving the oven, this hot air is reheated by the
convection
heater, passes through
the convection
passage and enters the inside of the oven cavity again,
in a continuing
cycle.
In this way, the hot air circulates inside the oven cavity
to raise its temperature and, at the same time, comes
into contact with the food being cooked.
When the temperature inside the oven cavity reaches
the convection
heater is
the selected temperature,
de-energized.
When the temperature inside the oven
cavity drops below the selected temperature, the convection heater is energized again. In this way, the inside of the oven cavity is maintained at approximately
the selected temperature.
When the convection
time reaches 0, the convection
heater is deenergzed and the convection
fan stops operating and the oven shutts off.
Upon completion of the cooking time, the audible signal will sound, and oven lamp, turntable motor, cooling
fan motor and convection
motor are de-energized.
At
the end of the convection
cycle, if the cavity air temperature is above 118 OC., the circuit to RY5 will be
maintained (by the thermistor circuit) to continue operation of the cooling fan motor until the temperature
drops below 118 OC., at which time the relay will be
de-energized, turning off the fan motor. Relay RY3 will
however, open as soon as the convection
cycle has
ended, turning off the convection
fan motor.This will
now cool and allow the damper door to open.

Convection
Cooking:
Damper is in the closed position, so that no hot air will
be allowed to leak out the oven cavity.
Damper Operation
I, When power supply cord is plugged in:
l-l.
When power supply cord is plugged in, a signal is sensed in the control unit, and operates
shut-off relay (RY6).
relay (RY6) close, the
1-2. Contacts of shut-off
damper
motor
is energized,
opening
the
damper door.
1-3. When the damper is moved to the open position by the damper cam dampe switch
is
closed (ON position).
1-4. The signal of damper switch is re-sensed in
the control unit and shut-off relay (RY6) is
turned off.
1-5. The 240 volts A.C. to the damper motor is
stopped and the motor turns off.
2.

When oven is microwave cooking:
Damper is in the open position.

When oven is convection cooking:
3-l. Damper motor is energized by touching
the
convection, temperature and START pads.
3-2. When damper
is in the closed
position
(damper switch is OFF), its signal is sensed
by the control unit, and shut-off relay (RY6)
is de-energized.
3-3. The damper is held in the closed position
during the convection cooking operation.
3-4. At the end of the convection cooking, shut-off
relay (RY6) is energized, and the damper is
returned to the open position.

NOTE:

If the damper door is not in the proper position,
closed durin
convection
or open durning
microwave, the control unit will stop oven operation after 1 minute.
Cooking

DAMPER
OPEN-CLOSE
MECHANISM
Usually, the damper is in the open position
except
during convection cooking.
Damper position is set automatically
by damper motor,
damper switch, motor cam and damper shaft.
These components are operated by a signal that judges
if microwave cooking or convection
cooking operation
is selected by the CPU unit.

Mode

Microwave

cooking

Convection

cooking

Operation
OPEN
CLOSE

Sensor cooking

OPEN

Automatic

mix cooking

Grill cooking

Slow cooking

of Damper

SERVICING
TROUBLESHOOTING
When troubleshooting
the microwave
oven, it is
helpfull to follow the Sequence of Operation in performing the checks. Many of the possible causes of
trouble will require that a specific test be performed.
These tests are given a procedure letter which will be
found in the “Test Procedure”section.

GUIDE

IMPORTANT:

lf the oven becomes inoperative
because of a blown fuse in the monitor
switch and upper latch switch circuit,
check the monitor switch and upper
latch switch before replacing the fuse.
If the fuse is replaced, the monitor
switch
should
be replaced
at same
time.
(RD8’ll

PROBLEM

POSSIBLE

CAUSE

TEST PROCEDURE
CORRECTION

OZU)

OFF CONDJTION

Home fuse blows when
power
cord is plugged into wall receptacle.

Shorted
ness.

wire

in power

cord or wire

har-

Replace cord or check wiring.

Fuse blows when power cord
plugged into wall receptacle.

Shorted
ness.

wire

in power

cord or wire

har-

Replace power cord or check
and repair harness.

Defective
88:88 do not appear in display
when power cord is first plugged
into wall outlet.

monitor

switch.

Procedure

No power at outlet.
Blown fuse.
Blown

magnetron

Defective

thermal

Check home fuse.
Procedure

Oven lamp does
door opened.

not

light

with

temp. fuse.

Procedure

cut-out.

Procedure

Open wire in power cord, wiring harness,
or wrrrng between control panel assembly
units.

Display does not operate properly
when
STOP/CLEAR
key
is
touched.
(B uzzer should sound
and time of day should appear in
display.)

Replace or repair wiring.

Defective

CPU unit.

Procedure

Defective

relay unit.

Procedure

Defective

key unit.

Procedure

Defective

CPU unit.

Procedure

Defective

relay unit.

Procedure

Defective

stop switch.

Procedure

No power in home.
, Open wire in power cord or wire harness.
Defective

oven lamp.

Defective

upper latch switch.

Replace.
-*

Blow fuse.
Defective

thermal

Defective

magnetron

cut-out.

Open or loose wire
above components.

Check wall outlet.
, Replace same or repair wirrng.

temp. fuse.
connection

to the

Procedure

Procedure H.
Check wiring.

R -8580

PROBLEM

POSSIBLE

COOKING
Oven lamp does not light in cook
cycle.
(Does light when door is opened)
Oven lamp does not light at all.
Oven lamp lights, but
motor does not operate.

turntable

Turntable motor operates normally
but cooling fan motor does not
operate

CAUSE

TEST PROCEDURE
CORRECTION

CONDITION

Defective
unit.

shut-off

Defective

CPU unit.

relay

(RY2)

on relay

Procedure

Burned out bulb.

Replace

Open wiring

Check and repair wiring

of oven lamp.

Open or loose wiring
Defective

turntable

Defective

cooling

Defective
unit.

to turntable

motor.

Replace

motor.

Replace.

fan motor.

shut-off

relay

Open or loose wiring

Check and repair wiring

(RY5)

on relay

Procedure

Check and repair wiring

to fan motor

MICROWAVE
Oven does not go into a cook cycle when START pad is touched.

Upper
switch

latch switch
and/or
lower
defective or out adjustment.

but
is

Oven does not cook
properly
when
programed
for MEDIUM
etc. cooking powers.
(Operates properly on HIGH)
Oven does not cook
properly
when
programed
in EASY DEFROST cooking mode.

Defective

cook relay (RYI ) on relay unit.

Procedure

CPU unit.

Procedure

Defective

key unit.

Procedure

to above

compo-

Check and repair wiring

Defective
Defective

magnetron.
cook relay (RYI ) on relay unit.

Procedure

Defective

power transformer.

Procedure

Defective

high voltage

rectifier.

Procedure

Defective

high voltage

capacitor.

Procedure

Defective

CPU unit.

Procedure

Open or loose
nents.
Oven goes into a cook cycle
heating
uneven
extremely
produced in oven load(food).

Procedure

Defective

Open or loose wiring
nents.
Oven seems to be operating
but
little or no heat is produced
in
load.( Food
oven
incompletely
cooked or not cooked at all at end
of cook cycle.)

latch

wiring

to above

compo-

Check and repair wiring

Turntable

motor does not operate.

Replace turntable
motor
check and repair wiring.

Defective
Defective

CPU unit.
key unit.

Procedure

Open or loose
I nents.
Defective

wiring

to above

EASY DEFROST function.

compo-

Check and repair wiring
Refer to EASY
DEFROST
section in operation
manual
and check CPU unit.

R -8580

POSSIBLE

PROBLEM

CAUSE

TEST

PROCEDURE
CORRECTION

CONVECTION

rCONV
does
when

indicator
light but oven
not go into a cook cycle
START pad is touched.

Defective

heater relay(RY4)

Lower than preset temperature.
Cooling fan motor, turntable
tor
and
oven
lamp
intermitantly
or all the time.

key unit.

Procedure

thermistor.

procedure

in circuit

Convection
cycle
then shuts down.

runs 3 minutes

to above

Defective

convection

Defective

heater relay(RY4)

Defective

CPU unit.

Defective
Defective

CPU unit.

Defective

convection

Defective

thermistor.

compo-

heater.

convection

on relay unit.

connection

the

heater.
motor.

Check and repair wiring.
Procedure

Procedure

Check and repair wiring.
Procedure

Procedure

Replace motor.
Procedure

Defective

cooling

fan motor.

Replace fan motor.

Defective

dumper

motor.

Procedure

Defective
fan.

drive mechanism

Low power supply
morun

Defective

Open or loose wire
above components.
Temperature in the oven cavity
lower or higher than preset.

Procedure

Defective

Open wiring
nents.
CONV indicator lights, but heating
element does not heat.

on relay unit.

of convection

voltage.

Check.
Check voltage.

Thermistor

shorted.

Procedure

Thermistor

open.

Procedure

SENSOR
Oven is in the
condition but AH
end stage 1 or
cooking cycle or
soon.

sensor cooking
sensor does not
does not stop
the oven stops

AH sensor open and/or
Defective CPU unit.
0 pen or loose wire
above components.

short.
connection

AH sensor assembly
and/or
are not re-installed correctry.

to the

steam duct

Check and repair wiring.
Check and repair them.

R-8580

TEST

PROCEDURES

PROCEDURE
LETTER

COMPONENT
MAGNETRON
DISCHARGE THE HIGH
NENTS OR WIRING.

VOLTAGE

TEST

ASSEMBLY

CAPACITOR

TEST

BEFORE TOUCHING

ANY

OVEN COMPO-

To test for an open filament, isolate the magnetron from the high voltage circuit.
check across the magnetron filament leads should indicate less than 1 ohm.

A continuity

To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament
leads and chassis ground.
This test should indicate an infinite resistance.
If there is little or no
’ resistance, the magnetron is grounded and must be replaced.
Power output of the magnetron can be measured by performing a water temperature rise test.
This test should only be used if above rests do not indicate a faulty magnetron and there is no
defect in the following
components
or wiring:
high voltage rectifier, rectifier, high voltage
capacitor, and power transformer.
MICROWAVE
OUTPUT
POWER
Microwave output power from the magnetron can be measured by way of substitution,
i.e. it can
be measured by using water load how much it can be absorbed by the water load. To measure
the microwave output power in the microwave oven, the relation of calorie and watt is used.
When P(W) heating works for t(second),
approximately
P x t/4.2 calorie is generated. On the
other hand, if the temperature of the water with V(ml) rises AT ( “C) during this microwave
heating period, the calorie of the water is V x AT.
The formular is as follows;
Pxt/4.2=Vx
P(W)=4.2xVx

AT
AT/t

Our condition for the water load is as follows:
Water load ... 2000 ml, Heating time ...I 20 seconds
P=7Ox
AT
Measuring method;
1. Put the water load of two (2) litres on the center of the oven shelf. The water load should
be arranged in two (2) Pyrex beakers, the size of which is one (1) litre, and be placed at right
and left, side by side, on the oven shelf.
2. Measure the temperature of water before heating and also after heating during 120 seconds
by microwave, and calculate the temperature rise. The temperature rise should be the average
of temperature differences measured in each beaker.
In case the measuring result is not satis3. The output power should be calculated as follows.
factory, execute the measurement several times and judge the result from the synthetic point
of view. Microwave
output power should be within
+ 15% of the nominal one.
Calculation
Microwave

of output power;
AT(%)
output power ...P(W)=7Ox
AT = ( ATL + ATR) / 2 : average temperature
ATR = (TR2 - TRI)
ATL = (TL2 - TLI),
TL2 : water temperature after heating in left beaker
TLI : water temperature before heating in left beaker
TR2 : water temperature after heating in right beaker
TRI : water temperature before heating in right beaker

rise

Measuring condition;
As the microwave output is affected by several conditions,
the measurement should be made
carefully with following
attentions.
1. Initial temperature of salt water should be 10 + 1 “C. Well and quickly stir the water and the
temperature measurement should be done immediately after heating.
2. The graduation of thermometer should be scaled by 0.1 “C at minimum and an accurate mercury thermometer is recommended.
14

R-8680

TEST

PROCEDURES

PROCEDURE
LETTER

(CONT’D)

COMPONENT
3. Water
mately
4. Room
5. Power

TEST

container should be one (1) litre beaker made of Pyrex glass and its diameter approxi12 cm.
temperature should be around 20 “C.
supply voltage should be specification
voltage.
POWER

DISCHARGE THE HIGH
NENTS OR WIRING.

VOLTAGE

TRANSFORMER

CAPACITOR

TEST

BEFORE TOUCHING

ANY

Disconnect the primary input terminals and measure the resistance of the
ohmmeter. Check for continuity
of the coils with an ohmmeter. On the R x 1
of the primary coil should be approx. 1.6 ohm and the resistance of the high
be approximately
74 ohms; the resistance of the filament coil should be less
(HIGH VOLTAGES ARE PRESENT TO HIGH VOLTAGE
MEASURE THE FILAMENT AND HIGH VOLTAGE.)
C

HIGH

VOLTAGE

RECTIFIER

DISCHARGE THE HIGH
NENTS OR WIRING.

VOLTAGE

CAPACITOR

TERMINAL,

AND

OVEN COMPO-

transformer with an
scale, the resistance
voltage coil should
than 1 ohm.

SO DO NOT ATTEMPT

RECTIFIER

TEST

BEFORE TOUCHING

ANY

OVEN COMPO-

HIGH VOLTAGE RECTIFIER TEST
Isolate the high voltage rectifier from the circuit. Using the highest ohm scale of the meter read
the resistance across the terminals and observe, reverse the leads to the high voltage rectifier
terminals and observe meter reading.
If a short is indicated in both directions, or if an infinite
resistance is read in both directions, the high voltage rectifier is probably defective and should
be replaced.
RECTIFIER TEST
Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance
across the terminals, reverse the leads to the rectifier terminals and observe meter reading. If an
infinite resistance is read in both directions, the rectifier is good.
If a short is indicated in either direction, the one is probably defective and should be replaced.
D

HIGH
DISCHARGE THE HIGH
NENTS OR WIRING.

VOLTAGE

CAPACITOR

TEST

BEFORE TOUCHING

ANY

OVEN COMPO-

If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input
leads and check for short or open, between the terminals using an ohmmeter.
Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate
continuity
for a short time and should indicate approximately
IOM R once the capacitor is
charged. If the above is not the case, check the capacitoi’with
an ohmmeter to see if it is shorted
between the terminals. If it is shorted, replace the capacitor.
(RD82603U)

SWITCH

TEST

Isolate the switch and check the contacts by using an ohmmeter using the following
table.
If improper operation is indicated, make the necessary switch adjustment or replacement.
Table: Switch
Connection
Operation

Connection

Common Terminal-Normally
Open Terminal
(COM)
(NO)

Common Terminal-Normally
Close Terminal
(COW
(NC)

Plunger released

Open circuit

Close circuit

Plunger pushed

Closed circuit

Open circuit
(RD82701U)

R-8580

TEST

PROCEDURES

PROCEDURE
LETTER

(CONT’D)

COMPONENT
MONITOR

TEST

SWITCH

TEST

Before performing this test, disconnect
oven from power supply and make sure that the upper
latch switch is operating properly referring to the above Switch Test Procedure.
Disconnect the wire lead from the monitor switch (NC) terminal.
Check the monitor switch operation by using the ohmmeter as follows.
When the door is open, the meter should indicate a closed circuit.
When the monitor switch actuater is pushed by a screw driver through the upper latch hole on
the front plate of the oven cavity with the door opened (in this condition
the plunger of the
monitor switch is pushed in), the meter should indicate an open circuit.
If improper operation is indicated, replace the defective switch..
After testing

the monitor

switch,

re-connect

the wire lead to the monitor

switch

(NC) terminal.

SCREW.

UPPER

’

LACCH
HOLE

BLOWN

FUSE

If the fuse in the upper latch-monitor
switch circuit is blown when the door is opened, check the
upper latch switch and monitor switch according to the Test Procedure for those switches, before
replacing the blown fuse.
If the fuse is replaced, the monitor switch should be replaced at the same time.
If the fuse is blown by improper switch operation, adjust or replace the defective switch,
the same time.
Replace the fuse and monitor switch, even if the switches operate normally
CAUTION; REPLACEMENT
FUSE MUST BE THE LISTED FUSE IN PARTS LIST.
H

TEMP.

fuse at

FUSE TEST

A continuity
check across the temp. fuse terminals should indicate a closed circuit.
If the temperature of the magnetron reaches 142 ‘C, the temp. fuse opens. If the temp. fuse has
opened, replace the fuse. An open temp. fuse indicates overheating of the magnetron assembly.
Check for restricted air flow to the magnetron through the opening in the chassis, especially the
cooling duct and tolling fan.
I

THERMAL

CUT-OUT

A continuity
check across the thermal cut-out terminals should indicate a closed circuit unless
the temperature of the thermal cut-out reaches approximately
140 “C. The termal cut-out resets
automatically
at approximately
115 “C.
If the thermal cut-out has opened under the normal condition,
replace the same one is parts list.
An open thermal cut-out indicates overheating
of the heater unit. Check for restricted air flow
to the heater unit through the vent holes of the oven cavity, especially the heater duct and convection fan

R -8580

TEST
PROCEDURE
LETTER

PROCEDURES

(CONT’D)

COMPONENT
CONVECTION

TEST

HEATER

TEST

Make sure the convection
heater is fully cooled and test as follows;
a. Disconnect wire leads and measure the resistance with an ohmmeter.
On the R x 1 scale, the
resistance between the convection
heater terminals should be approximately
38 ohms.
b. Disconnect wire leads and measure the insulation resistance with 500V - IOOM R insulation
resistance meter.
The insulation resistance between convection
heater terminal and cavity should be more than
0.5M R.
THERMISTOR

K
Disconnect
ohmmeter.

connector-E
from the control unit. Measure the resistance
Connect the ohmmeter leads to Pin No’s E-3 and E-4.

Room Temp.

Resistance

20 “C - 30 “C

Approx.

If the meter does not indicate
L

TEST
of the thermistor

with

350 n - 155 S2

above resistance,

replace the thermistor.

DAMPER

TEST

MOTOR

When the power cord is plugged into the wall receptacle, and 240 volts A.C. is supplied to the
damper motor the motor operates until the damper is opened and the damper switch closes. Then
the damper motor stops operation.
If the damper motor does not operate, check for input voltage by A.C. volt-meter at the motor.
1. Disconnect the power cord from the wall receptacle.
2. Disconnect the wire leads of motor and connect the meter leads to the wire leads of main wire
harness.
3. Reconnect the power cord into the wall receptacle.
If 240 volts A.C. is indicated at the wire leads, replace the motor.
Not indicated, check the wire harness and the relay unit.
(RD82EOl

DAMPER

SWITCH

TEST

Disconnect the wire leads from the switch terminals and connect ohmmeter leads to the common
(COM) and normally open (NO) terminals of the switch.
1. When switch actuator is pushed by the damper motor cam, the meter should indicate a closed
circuit.
2. When the power cord is plugged into the wall receptacle, the damper motor operates and
damper cam starts to rotate.
The switch actuator is released the meter should indicate an open circuit.
If improper operation is indicated, replace the damper switch.
(RD82702U)

R-8580

TEST

PROCEDURES

PROCEDURE
LETTER

(CONT’O)

COMPONENT
RELAY

TEST

UNIT

TEST

The relay unit consists of circuits including the shut-off relays, buzzer, transformer, etc.
Plug power cord into wall receptacle “88:88” will be flashing in the display.
Remove the outer case and check voltage between Pin Nos. 1 and 3 of the 6-pin connector
on the relay unit with an A.C. voltmeter.
The meter should indicate 240 volts, if not check oven circuit.

(A)

Shut-off,
Cook and Heater Relay Test
These relays are operated by D.C. voltage.
Check voltage at the relay coil with a D.C. voltmeter during the microwave or convection cooking
operation.
.,........ Defective relay.
DC. voltage indicated
DC. voltage not indicated . ... ....Check diode which is connected to the relay coil. If diode is
good, control unit is defective.

RELAY

SYMBOL
I

RYl

(COOK)

OPERATIONAL
VOLTAGE

CONNECTED

COMPONENTS
I

Approx.

14 V. D. C.

Power transformer

RY2

Approx.

14 V.D.C.

Oven lamp/Turntable

RY3

Approx.

14 V.D.C.

Convection

RY4 (HEATER)

Approx.

14 V.D.C.

Heating element

RY5

Approx.

14 V. D. C.

Cooling fan motor

RY6

Aoorox.

14 V.D.C.

DamDer motor

motor

(RD82R02U)

TEST

PROCEDURES

PROCEDURE
LETTER

(CONT’O)

COMPONENT
TOUCH

CONTROL

TEST

PANEL

ASSEMBLY

TEST

The touch control panel consists of circuits including
semiconductors
such as LSI, ICs, etc.
Therefore, unlike conventional
microwave ovens, proper maintenance cannot be performed with
In this service manual, the touch control panel assembly is dionly a voltmeter and ohmmeter.
vided into three units Control Unit, Key Unit and Relay Unit and troubleshooting
by unit replacement is described according to the symptoms indicated.
1. Key Unit.
The following
symptoms indicate a defective key unit. Replace the key unit.
a) When touching the pads, a certain pad produces no signal dt all.
b) When touching a number pad, two figures or more are displayed.
c) When touching the pads, sometimes a pad produces no signal.
2. Control Unit
The following
symptoms indicate a defective control unit. Replace the control unit.
2-1 In connection
with pads.
a) When touching the pads;a certain group of pads do not produce a signal.
b) When touching the pads, no pads produce a signal.
2-2 In connection
with indicators
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light up.
d) The corresponding
segments of all digits do not light up; or they continue to light up.
e) Wrong figure appears.
f) A certain group of indicators do not light up.
g) The figure of all digits flicker.
2-3 Other possible troubles caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Clock does not operate properly.
c) Cooking is not possible.
d) Proper temperature measurement is not obtained.
Note: When defective components,
the Control Unit, Key Unit or Relay Unit are replaced, the
defective part or parts must be properly packed for return in the shipping carton, with its
cushion material, in which the new replacement part was shipped to you.
(RD82SOl

KEY UNIT

TEST

If the indicator does not respond to touching
a key Pad use the following
matrix and place a
jumper wire between the proper pin connections
making momentary contact with the cable
connector disconnected
from the control unit.
If the indicator responds and oven goes into operation, the key unit was faulty.
If there is no response, replace the control unit,

-9 3
5-l
0

160°C

250°C

HIGH

150°C

230-C

MED HIGH

13o”c2
I

220°C

MED

CLOCK 1 CLEAR

70°C

200%

40%

180%

I
LowM’

MU) Low
LOW

1 COOK

1 KEY

HOU)

UNIT ‘]

TEST

PROCEDURES

PROCEDURE
LETTER

(CONT’O)

COMPONENT
AH SENSOR

TEST
TEST

Checking the initial sensor cooking condition
(1) The oven should be plugged in at least five minutes befor sensor cooking.
(2) Room temperature should not exceed 35 “C.
(3) The unit should not be installed in any area where heart and steam are generated. The
unit should not be installed, for example, next to a conventional
surface unit. Refer to the
“INSTALLATION
Instruction”.
(4) Exhaust vents are providend on the back of the unit for proper cooling and air flow in the
cavity.To permit adequate ventilation,
be sure to install so as not to block these vents,
There should besome space for air circulation.
(5) Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe
off any moisture with a dry cloth or paper towel.
(6) The Sensor works with food at normal storage temperature.For
example, chicken pieces
would be at refrigerator temperature and canned soup at room temperature.
(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensor will detect the vapor given of by the spray and turn off befor food is
properly cooked.
(8) After 30 minutes if the sensor has not detected the vapor of the food, ERROR will appear
and the oven will shut off.
Water load cooking test
Make sure the oven has been plugged in at least five minutes before checking sensor cook operation The cabinet should be installed and screws tightened.
(1) Fill approximately
200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
(2) Place the container on the center of tray in the oven cavity.
(3) Close the door.
(4) Touch SENSOR COOK pad and number pad I. Now, the oven is in the sensor cooking
condition and SC-l will appear in the display.
(5) Touch Start pad.The oven will operate for the first 16 seconds, without generating microwave energy.
When the AH sensor is defective (open or short), ERROR will appear in the display after 16
seconds cooling time.
If ERROR appears check sensor wire connections
and/or AH sensor.
NOTE: ERROR will appear if the door is opend or STOP/CLEAR
pad is touched during first
stage of sensor cooking.
(6) After approximately
16 seconds, microwave energy is produced, oven should turn off when
water is boiling (bubling).
If the oven does not turn off, replace the AH sensor or check the control
nation below:
TESTING

METHOD

FOR AH SENSOR

AND/OR

unit, refer to expla-

CONTROL

UNIT

To determine if the sensor is defective, the simplest method is to replace it with a new replacement sensor.
(1) Disconnect oven from power supply and remove outer case.
(2) Discharge the high voltage capacitor.
(3) Remove the AH sensor.
(4) Install the new AH sensor.
(5) Re-install the outer case.
(6) Reconnect the oven to the power supply andcheck the sensor cook operation proceed as
follows:
6-1. Touch SENSOR COOK pad and number 0 pad.
6-2. Touch Start pad. The control panel is in automatic Sensor operation.
6-3. The oven will turn off automatically
when the water is boiling (bubling).
If new sensor dose not operate properly,

the problem

is with the control

unit.

R-8580

TEST

PROCEDURES

PROCEDURE
LETTER

(CONT’D)

COMPONENT
CHECKING
(1)
(2)
(3)
(4)
(5)
(6)

TEST

CONTROL

UNIT

Disconnect oven from power supply and remove outer case.
Discharge the high voltage capacitor.
Disconnect the wire leads from the cook relay.
Disconnect the sensor connector that is mounted to lower position of control panel.
Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
Reconnect the oven to the power supply and check the sensor cook operation proceed as
follows:
6-1. Touch SENSOR COOK pad and number 0 pad.
6-2. The control panel is in the sensor cooking operation.
6-3. After approximately
20 seconds, push plunger of select switch.
This condition
is same as judgement by AH sensor.
6-4. After approximately
3 seconds, cooking operation turns off, an audible signal will
sound, and the display will then revert to the time of day.

If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.

Plunger

0-J
NC
NO

To Connector
(F)
on Control Untt
CONNECTOR

Rl,

R2
R3
R4

: loon
: 10kR
: 12kR

t 1%
? 5%
* 5%

1/2w
1/4W
1/4W

F-l F-2..-F-3 rc-

I Switch
R4

Sensor Dummy
R

PROCEDURES
BOARD(PWB)

TO BE TAKEN
IS OPEN.

WHEN

Resistor

iNO.

-2

Circuit

THE FOIL PATTERN

ON THE

PRINTED

WIRING

To protect the electronic circuits, this model is provided with a fine foil pattern added to the
primary on the PWB, and this fine pattern service as a substitute coil. If the foil pattern is open,
follow the troubleshooting
guide given below for repair.
Problem:

_.-POWER C
JN, indicator

STEPS

does not light up.

OCCURANCE

CAUSE OR CORRECTION

The rated voltage
of CPU connector

is not applied to POWER terminal
(CN-A)

Check supply voltage and oven main unit.

The rated voltage

is applied to primarv side of Dower

Power

NOTE:* At the time of these repairs, make visual inspection of the varistor for burning damage
and examine the transformer with tester for the
presence of layer short-circuit
(check primary
coil resistance).
If any abnormal condition is detected, replace
the defective parts.

transformer

or secondarv

circuit

defective.

R-8580

TOUCH

CONTROL

OUTLINE

PANEL ASSEMBLY

OF TOUCH

The touch control section consists of the following
units as shown in the touch control panel circuit.
(1) Relay Unit
(2) Key Unit
(3) Control Unit
The principal functions
of these units and the signals
communicated
among them are explained below.
(RD911

Relay Unit
Relay unit consists of six relays
source circuit and buzzer circuit.

(RYI -RY6),

(RD918Al

(RD919Al

(RD914BlU)

Buzzer Circuit
The buzzer is responsive to signals
from the LSI
to emit noticing
sounds (key touch sound and
completion sound).

Measurement
Circuit:
Oven
Temperature
temp.
The temperature in the oven cavity is sensed by the
thermistor.
The variation
of resistance according
to sensed
temperature is detected by the temperature measurement circuit and the result applied to LSI.
The result of detecting is given to LSI controlling
the relay and display.

Absolute
Humidity
Sensor Circuit
The circuit detects absolute humidity
of a food
which
is under cooking, to allow its automatic
cooking.

Door Sensing Switch
A switch to “tell” the LSI if the door
closed.

(RD91

LSI
This LSI controls
the temperature
measurement
signal, AH sensor signal, key strobe signal, relay
driving signal for oven function and indicator signal.
(RD916Al

(RD91 AA1 U)

Control Unit
Control unit consists of LSI, power source circuit,
synchronizing
signal circuit, ACL circuit, buzzer circuit,
temperature
measurement
circuit,
absolute
humidity
sensor circuit and indicator circuit.
(RD915Bl

Synchronizing
Signal Circuit
The power source synchronizing
signal is available
in order to compose a basic standard time in the
clock circuit.
It accompanies a very small error because it works
on commercial frequency.
Circuit
A circuit to generate a signal which resets the LSI
to the initial state when power is supplied.

power

(RD913Al

PANEL

4) ACL

A4U)

Key Unit
The key unit is composed of a matrix, signals generated
in the LSI are sent to the key unit through
E7,E8,
El 1 -El 3and El 5-E17.
When a key pad is touched, a signal is completed
through
the key unit and passed back to the LSI
through AN4-AN7
to perform the function
that was
requested.

Power Source Circuit
This circuit generates voltages
control unit.

CONTROL

(RD91

FBI U)

GA1 U)

is open

(RD91 BAZU)

necessary

in the

Symbol

Voltage

Application

-5v

it
VP

-16V
+0.5v
-34v

VFI

-25V

VF2

-28V

LSI (ICI ), ACL circuit and temperature measurement circuit
Buzzzer circuit and IC2
IC2
Fluorescent
display tube : Grid
and anode voltage
Filament of fluorescent
display
tube
VFI - VF2 voltage

Relay Circuit
To drive the magnetron, heating
tor, convection
motor,damper
motor and light the oven lamp.

element, fan momotor,
turntable
(RD91 CBI U)

(RD917Al

10) Indicator
Circuit
Indicator element is a Fluorescent Display.
Basically, a Fluorescent Display is triode having a
cathode, a grid and an anode. Usually, the cathode
of a Fluorescent Display is directly heated and the
filament serves as cathode.
The Fluorescent Display 7-digits, 15-segments
are
used for displaying figures.
(RD91 DA1 U)

DESCRIPTION
LSI( IZA096DR)
The I/O signal of the LSI(IZA096DR)

is detailed

OF LSJ

in the following

table.
(RD93101

PIN NO.

Digit selection
signal.
Refer to the touch control
Normally,

1 SIGNAL

l-6

panel circuit

one pulse is output

) EO-E5

about the relation

in every synchronized

signal

I
between

I/O

/ OUT

signals and digits.

period, and input to the grid of the fluorescent

disrla[.
(RDS

PIN NO.

Segment
data signals.
Refer to the touch control
Normally,
PIN NO.

1 SIGNAL

panel circuit

one pulse is output
/ 8

j E6

for the relationship

in every synchronized
1 SIGNAL

Segment
data siqnal.
Signal similar to E6.
Key strobe signal.
Signal applied to touch-key section.
A pulse signaLis input to AN4-AN7
terminal

I
between

I/O

signals and indicators,

I I/O j

/ E7

one of G-l

dis..lax.
(RDS

SAl

OUT

line keys on key matrix is touched.
(RD939A3U)

PIN NO.

j 9

1 SIGNAL

Segment data sianal.
Signal similar to E6.
Key strobe signal.
Signal applied to touch-key section.
A pulse signal is input to AN4-AN7
terminal
PIN NO.

/ IO,11

j E8

while

1 SIGNAL

l/O

j OUT

one of G-2 line keys on key matrix is touched.

! E9,ElO

I I/O

(RD939A3U)

/ OUT

Segment
data sianal.
Signal similar to E6.
(RD939AZU)

PIN NO.

j 12

1 SIGNAL

Segment
data signal.
Signal similar to E6.
Key strobe sianal.
Signal applied to touch-key section.
A pulse signal is input to AN4-AN7
terminal
PINNO.

j 13

/ El 1

while

1 SIGNAL

Segment
data siganal.
Signal similar to E6.
Kev strobe signal.
Signal applied to touch-key section.
A pulse signal is input to AN4-AN7
terminal

I/O

1 OUT

one of G-3 line keys on key matrix is touched.

I I/O

( El2

(RD939A3U)

1 OUT

-s

while

one of G-4 line keys on key matrix is touched.
(RD939A3U)

PIN NO.

1 SIGNAL

Seament
data signal.
Signal similar to E6.
Kev strobe signal.
Signal applied to touch-key section.
A pulse signal is input to AN4-AN7
terminal

I l/O

j El3

while

) OUT

one of G-5 line keys on key matrix is touched.
(RD939A3U)

)

j OUT

signal period, and input to the anode of the fluorescent

while

f3Al

)

R-8580

PIN NO.

1 SIGNAL

I I/O

/ El4

j OUT

Segment data signal.
Signal similar to E6.
PIN NO.

1 SIGNAL

/ 16

Seqment
data siqnal.
Signal similar to E6.
Kev strobe siqnal.
Signal applied to touch-key section.
A pulse signal is input to AN4-AN7
terminal
PINNO.

1 SIGNAL

I17

Segment data siqnal.
Signal similar to E6.
Kev strobe siqnal.
-Signal applied to touch-key section.
A pulse signal is input to AN4-AN7
terminal
PIN NO.

Seqment data siqnal.
Signal similar to E6.
Kev strobe siqnal.
Signal applied to touch-key section.
A pulse signal is input to AN4-AN7
terminal

I I/O

(RD939A3U)

) OUT

one of G-7 line keys on key matrix is touched.

I I/O

1 El7

while

1 OUT

one of G-6 line keys on key matrix is touched.

1 El 6

while

1 SIGNAL

/ 18

I I/O

j El5

while

(RD939A2U)

(RD939A3U)

1 OUT

one of G-8 line keys on key matrix is touched.
(RD939A3U)

PIN NO.

1 SIGNAL

1 19,20

I I/O

j El 8,E19

j OUT

Seqment data signal.
Signal similar to E6.
PIN NO.

1 SIGNAL

/ 21-24

Used for initial
PIN NO.

(RD939A2U)

balancing

) 25

Internal clock oscillation
The internal clock frequency
PIN NO.

j 26

Internal clock oscillation
Output to control oscillation
PIN NO.

j 27

1 SIGNAL

I I/O

1 E20-E23

of the bridge circuit(absolute

himidity

frequency
control
input of EX.
1 SIGNAL

(RD936Al

I l/O

j EX

frequency
input settinq.
is set by inserting the ceramic filter oscillation
1 SIGNAL

; OUT

sensor).

circuit

with

I I/O

j X

respect to X terminal.

(RD93EA2U)

/ OUT

output.
(RD93EAl

/ RESET

I I/O

1 IN

Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied.
Temporarily set to “L” level the moment power is supplied, at this time the LSI is reset,
Thereafter set at “H” level.
PIN NO.

1 28

1 SIGNAL

/ SO E24

Segment data siqnal.
Signal similar to E6.

I I/O

(RD93MA2U)

/ OUT

(RD939A2U)

R -8580

PIN NO.

Used for initial
PIN NO.

1 SIGNAL

1 29
balancing

of the bridge circuit(absolute
1 SIGNAL

/ 30

I I/O

j SI E25
himidity

sensor).

I I/O

/ E26

Signal to sound buzzer.
A: Key touch sound.(O.l
sec.)
B: Completion
sound.(2.0 sec.)
C: When the temperature of the oven cavity reaches the preset temperature
preheating hold time (15 minutes) is elapsed.
(I .O sec. ON-l .O sec. OFF repeat)
PIN NO.

SIGNAL

1 31

Signal svnchronized
with commercial
This is the basic timing for time processing
PIN NO.

SIGNAL

Power source voltage:
-5V.
VC voltage of power source circuit

(RD936Al

/ OUT

in the preheating

I l/O

j IRQ E27

source
of LSI.

/ OUT

mode, or when

the

(RD93LA2U)

/ IN

frequencv(50Hz).

I I/O

vss

(RD93FEl

input.
(RD93GAl

PIN NO.

j 33

1 SIGNAL

I I/O

/ RO

j OUT

Magnetron
high-voltaae
circuit driving signal.
To turn on and off the cook relay.
In HIGH operation, the signals holds “L” level during microwave cooking and “H” level while not cooking.
In other
cooking modes (MED. HIGH, MED., MED. LOW, LOW) the signal turns to “H” level and “1” level in repetition
according to the power level.
(RD933A2U)

PIN NO.

1 34

1 SiGNAL

I I/O

( RI

j OUT

Oven lamp and turntable
motor driving siqnal.(Square
Waveform:fiOHz)
To turn on and off the control relay.
The pulse signal(50Hz)
is delivered to the control relay driving circuit and cook relay, heater relay control

circuit.
(RD932Fl

PIN NO.

SIGNAL

I l/O

/ R2

j OUT

Heating element
driving signal.
To turn on and off the heater relay.
“1” level during convection
cooking; “H” level otherwise.
During convection
cooking or mix cooking, the signal becomes “H” level when the temperature
exceeds the predetermined
temperature.

of the oven cavity
(RD93464U)

PIN NO.

j 36

Coolinrr fan motor driving
To turn on and off the cooling
otherwise.

1 SIGNAL

I I/O

/ R3

signal.
fan motor relay, “1” level during

both microwave

j OUT

and convection

cooking;

“H” level
fRD934B2Ul

PIN NO.

1 37

1 SIGNAL

j R4

Convection
motor driving sianal.
To turn on and off the convection
motor. “1” level during

CONVECTION

I/O

j OUT

or MIX COOK; “H” level otherwise.
(RD93468U)

R -8580

PIN .NO.

/ 38

1 SIGNAL

I I/O

/ R5

j OUT

Damper motor relav driving signal.
To turn on and off the damper motor relay.
PIN NO.

1 SIGNAL

1 39

I l/O

/ R6

(RD93466UI

1 OUT

Digit selection
signal.
Signal similar to EO.
PIN NO.

1 SIGNAL

j 40

Input signal which communicates
Damper opened; “H” level signal.
Damper closed; “1” level signal.
PIN NO.

the damper

1 SIGNAL

1 41

I I/O

1 R7
open/close

information

1 E37

(RD938A2U)

/ IN

to LSI.

. I/O

(RD937Bl

(Rd93JAl

(RD937Al

1 IN

Terminal
to change functions
acccirdinq to the model.
Signal in accordance with the model in operation is applied to set up its function.
PIN NO.

1 SIGNAL

1 42

Input signal which communicates
Door closed; “H” level signal.
Door opened; “1” level signal.
PIN NO.

/ 43

Connected

to VC.

the door

1 SIGNAL

I I/O

/ E36
open/close

information

to LSI.

I I/O

j AVss

/ IN

j IN
(RD93KA3U)

PIN NO.

/ 44

1 SIGNAL

I l/O / IN

j AVR-

Reference
voltage input terminal.
A reference voltage applied to the A/D converter in the LSI.
The reference voltage is generally maintained at -5V.
(RD93GA4U)

PIN NO.

Reference
voltage input
A reference voltage applied
Connectd to GND.
PIN NO.

) 46

Connected

to GND.

PIN NO.

/ 47

1 SIGNAL
terminal.
to the A/D converter

I l/O

j AVR+
in the LSI.

(RD93GAW)

1 SIGNAL

I I/O

AVcc

1 SIGNAL

I I/O

1 AN7

SIGNAL

/ 49

1 SIGNAL

/ 50

1 SIGNAL

signal

a corresponding

signal will

I l/O
a corresponding

signal will

I l/O

/ AN4

out of E7,E8,Ell

-El3

and

(RD93CAl

j AN5

Signal coming from touch key.
When either one of G-9 line keys on key matrix is touched,

/ IN

I l/O

Signal coming from touch key.
When either one of G-l 0 line keys on key matrix is touched,
PIN NO.

a corresponding

1 AN6

Signal coming from touch key.
When either one of G-l 1 line keys on key matrix is touched,
PIN NO.

1 IN
(RD93KAl

Signal cominq from touch kev.
When either one of G-l 2 line keys on key matrix is touched,
El 5-El7 will be input into AN7.
When no key is touched, the signal is held at “1” level.
PIN NO.

1 IN

a corresponding

IN
be input

into AN6.

(RD93CA2U)

IN
be input

into AN5.

(RD93CA2U)

signal will be input into AN4. (RD93CA2U)

1 SIGNAL
/ AN3
/ IN
PIN NO.
/ 51
I/O
I
Used for initial balancing of the bridge circuit (absolute humidity sensor).
This input is an analog input terminal from the AH sensor circuit,and connected to the A/D converter

built into the
(RD936A3U)

PIN NO.

SIGNAL

( 52

AH sensor inuut.
This input is an analog input terminal
LSI.

/ AN2

from the AH sensor circuit,

I
and connected

I/O

to the A/D converter

built into the
(RD936A2U)

PIN NO.

1 SIGNAL

1 53

j AN1

Temperature
measurement
input: OVEN THERMISTOR.
By inputting
DC voltage corresponding
to the temperature detected
temperature by the A/D converter built into the LSI.

I/O

by the thermistor,

j IN
this input

is converted

into

(RD935Al

PIN NO.
Terminal

1 SIGNAL

1 54

j AN0

I/O

j IN

not used.
(RD93KA2U)

PIN NO.

1 55

Terminal

not used.

PIN NO.
Terminal

1 SIGNAL

1 56-60

) SIGNAL

j R8

/ R9-RI3

I/O

/ OUT

I l/O 1 IN

(RD93KA2U)

not used.
(RD93KA2U)

PIN NO.
Terminal

) 61
not used. Connected

SIGNAL

I I/O

j RI4

1 IN

to GND.
(RD93KAW)

PIN NO.

1 62

Terminal
for manufacture
Normally terminal not used.

1 SIGNAL

j RI5

l/O

j IN

test.
(RD93lA3U)

PIN NO.
Terminal

1 SIGNAL

I I/O / NC

1 NC

not used.
(RD93KA2U)

PIN NO.

j 64

Connected

to GND.

1 SIGNAL

I l/O

) vcc

j IN
(RD93KAl

R-8580

ABSOLUTE

HUMIDITY

(1) Structure
of Absolute
Humidity
Sensor
The
absolute
humidity
sensor
includes
two
thermistors
as shown
in the illustration.
One
thermister is housed in the closed vessel filled with
dry air while another in the open vessel.
Each
sensor is provided with the protective cover made
of metal mesh to be protected from the external
airflow.

(2) Operational
Principle
of Absolute
Humidity
Sensor
The figure below shows the basic structure of an
absolute
humidity
sensor.
A bridge circuit
is
formed by two thermistors and two resistors (Rl
and R2).
The output of the bridge circuit is to be amplified
by the operational amplifier.
Each thermister is supplied with a current to keep
it heated at about 150 “C (302 “F) and the resultant
heat is dissipated
in the air and if the two
thermistors are placed in different humidity conditions
they
show
different
degrees
of
heat
conductivity
leading to potentiaJ difference
between them causing an output voltage from the
bridge circuit, the intensity of which is increased
as the absolute humidity of the air increases. Since
the output is very minute, it will be amplified by the
operational amplifier.

output
vottaga

.
sit :

S: Thhenms

C: Thermistor
closed vessl

(RD72001

1 )Absolute

humidity

Q!3l
swt

RSO R.watOr Block

!
I,

-.,mJ
*.*
RsO-4)6

c
S

Thcrmlrtor m
closed vessel

RSO-III7

RSO&
”

RSO-7&
c.

23
22
2l

Thcrmlrtor In
open vessel

\JJj\i

2)lnternal

equivalent

circuit

Absolute humidity (g/m’ 1

Humidity
IDetector
Circuite
of Absolute
Sensor Circuit
This detector circuit is used to detect the output
voltage of the absolute humidity circuit to allow the
LSI to control sensor cooking of the unit.
When the unit is set in the sensor cooking mode,
16 seconds later the detector circuit starts to function and the LSI observes the initial
voltage
availabel at its AN2 terminal. With this voltage
given, the switches SW1 to SW5 in the LSI are
turned on in such a way as to change the resistance
values in parallel with R50.
-1. Changing the resistance values results in that
there is the same potential at both F-3 terminal of
the absolute humidity sensor and AN3 terminal of
the LSI. The voltage of AN2 terminal will indicate
about -2.5V. This initial balancing is set up about
16 seconds after the unit is put in the Sensor
Cooking mode.

Top View

E23d
E22^I
EZl/

SW301
SW47
WC-J

ma--I
7

=H
e
50.
2

sensor circuit

Absolute humidity vs.
output voltage characteristic

GIPC

T
-I

CIRCUIT

As sensor cooking proceeds, the food is heated to
generate moisture by which the resistance balance
of the bridge circuit to deviate increasing the voltage available at AN2 terminal of the LSl. Then the
LSI observes that voltage at AN2 terminal
and
compares it with its initial value, and when the
comparison rate reaches the preset value (fixed for
each menu to be cooked), the LSI causes the unit
to stop sensor cooking; thereafter, the unit goes
into the next necessary operation automatically.
When the LSI starts to detect the initial voltage at
AN2 terminal 16 seconds after the unit has been
put in the Sensor Cooking mode, if it is im possible
to take a balance of the bridge circuit due to disconnection
of the absolute humidity
sensor, ERROR will reappear on the display and the cooking
is stopped.

Internal Structure of Sensor

Operational
amplifier

SENSOR

of 12

“’

R -8580

SERVICING
1. Precautions
Components

for

Handing

For those models, therefore, check and repair
all the controls (with the sensor-related
ones
included)
of the touch control
panel while
keeping it in contact with the oven proper.
B. On some models, on the other hand, the power
supply cord between the touch control panel
and the oven proper is so long that they may
be separated from each other. For those models, therefore, it is allowed to check and repair
the controls of the touch control panel while
keeping it apart from the oven proper;in this
case you must short both ends of the door
sensing switch (on PWB) of the touch control
panel with a jumper, which brings about an
operational state that is equivalent to that with
the oven door being closed.
As to the sensor-related
controls of the touch
control panel, their checking is allowed if the
dummy resistor(s) whose resistance is equal to
that of those controls is used.
(2) Servicing
the touch
control
panel with
power
supply
from an external
power
source:
Disconnect the touch control panel completely
from the oven proper,and short both ends of
the door sensing switch (on PWB) of the touch
control
panel,which
brings about an operational state that is equivalent
with the oven
door being closed. And connect an external
power source to the power input terminal of the
touch control panel, and then it is allowed to
check and repair the controls
of the touch
control panel;as in the case of (1 )-B above, it
is here also possible to check the sensor-related
controls of the touch control panel by using the
dummy resistor(s).

Electronic

This unit uses PMOS LSl in the integral part of the
circuits.
When handing these parts, the following
precautions should be strictly followed.
PMOS LSI have extremely high impedance at its
input and output terminals. For this reason, it is
easily influenced
by the surrounding
high voltage
power source, static electricity charged in clothes,
etc,and sometimes it is not fully protected by the
built-in protection circuit.
,order to protect PMOS LSI.
:; When storing and transporting,
thoroughly
wrap them in aluminum foil.
Also wrap PW boards containing
them in
aluminium foil.
as
2) When soldering, ground the technician
shown
in the figure
and use grounded
soldering iron and work table.

.
k

Shapes

Transistor
2SB793

appror.lMSl
/

of Electronic

Transistor

2SA937
DTD143A

Components

Transistor
DTA143ES
DTA114YS
DTC114ES

16 (R112)
1
Resistor Block.
R50, R90, R 110
R112

Servicing
of Touch Control
Panel
We describe the procedures to permit servicing the
touch control panel of the microwave oven and the
cautions you must consider when doing so.
To carry the servicing, power supply to the touch
control panel is available either from the power line
of the oven proper itself of from an external power
source.
(I ) Servicing
the touch
control
panel with
power supply from the oven proper:
CAUTION:
THE HIGH VOLTAGE TRANSFORMER
OF
THE MICROWAVE
OVEN IS STILL ALIVE
TO GIVE YOU DANGER
DURING
SERVICING.
Therefore, when checking the performance of
the touch control panel,put the outer cabinet
on the oven proper to keep from touching the
high voltage transformer, or unplug the primary
terminal (connector)
of the high voltage transformer to turn it off; and the end of such connector shall be insulated
with an insulating
tape. After servicing,
be sure to replace the
leads to their original locations.
A. On some models, the power supply cord between the touch control panel and the oven
proper is so short that they can’t be separated
from each other.

Servicing
Tools
Tools required when servicing the touch control
panel assembly.
1) Soldering iron: 30W
(To prevent leaking current, it is recommended
to
use a soldering iron with a grounding terminal.)
2) Oscilloscope:
Single beam, frequency
range:
DC - IOMHz type or more advanced model.
3) Others:
Hand tools

Other Precautions
1) Before turning on the power source of the
control unit, remove the aluminum foil applied
for preventing static electricity.
2) Connect the connectors of the indicator and
key units to the control unit taking care that the
lead wires are not twisted.
3) After aluminum foil is removed, take extra care
that abnormal voltage due to static electricity
etc. is not applied to the input or output terminals.
4) Attach connectors, electrolytic capacitors, etc.
to PWB, taking care that all connections
are
tight.
5) Be sure to use specified components where
high precision is required.
(RD94ZAZU)

R -8580

COMPONENT

REPLACEMENT

AND

WARNING:

To avoid possible exposure to microwave
energy;
A. Before operating the oven
1. Make sure that unlatching
the door slowly is
accompanied by a click indicating
actuation of
the monitor switch and latch switches.
2. Check visually the door seal for arcing and
damage.
B. Do not operate the oven until after repair if any of
conditions exist;
the following
1. Door does not close firmly against the front of
appliance.
2. There iS a broken door hinge or support.
3. The door is bent or warped.
-

ADJUSTMENT

PROCEDURE

There is any defective parts in the interlock,
oven door or microwave generating and transmission assemblv.
------ ---I.
5. There is any other visible damage to the oven.
C. Do not operate the oven
1. Without the RF gasket.
2. If the door is not closed.
CAUTION:
DISCONNECT
OVEN FROM
POWER
SUPPLY
BEFORE
REMOVING
OUTER
CASE.
DISCHARGE
HIGH
VOLTAGE
CAPACITOR
BEFORE
TOUCHING
ANY
OVEN
COMPONENTS OR WIRING.
(RDA?

POWER TRANSFORMER

RECTI IiFIER REMOVAL

HIGH VOLTAGE

CAUTION:

1. Disconnect
oven from power suppply and remove
outer case.
2. Discharge the high voltage capacitor.
3. Remove one (1) screw holding the rectifier to the
capacitor holder.
4. Disconnect the rectifier from the capacitor.

CAPACITOR

MOTOR

WHEN
REPLACING
THE
SILICON
RECTIFIER,
THE
GROUND
SIDE
TERMINAL
MUST
BE SECURED
FIRMLY
WITH
A
GROUNDING
SCREW.

REMOVAL

5. Disconnect rectifier and high voltage rectifier from
the capacitor. .br
6. Remove one (1) screw holding
the high voltage
rectifier and the capacitor holder.
7. Remove the capacitor from the holder.

Disconnect
oven from power supply and remove
outer case.
2. Discharge the high voltage capacitor.
3. Disconnect the high voltage wire leads from high
voltage capacitor.
4. Remove one (1) screw holding capacitor mounting
bracket.
I.

TURNTABLE

REMOVAL

3. Make sure the transformer is mounted correctly
to the corners underneath those tabs
the transformer,
secure the
4. After re-installing
transformer with two screws to the cabinet base,
one is with outertooth
washer and the other is
without outer-tooth
washer.
5
Re-connect
the wire leads (primary and high
voltage) to the transformer and filament leads of
transformer to the magnetron,
referring to the
“Pictorial Diagram”.
6. Re-install the outer case and check that the oven
is operating properly.

oven from power supply and remove
1. Disconnect
outer case.
2. Discharge high voltage capacitor.
filament leads of transformer from the
3. Disconnect
magnetron.
4. Disconnect wire leads from the transformer.
5. Remove two (2) screws and one (I) washer holding the transformer to the cabinet base.
Re-install
1. Rest the transformer on the base cabinet with its
primary terminals toward rear cabinet.
2. Insert the two edges of the transformer into two
metal tabs of the base cabinet.

HIGH VOLTAGE

203U)

AND/OR

COUPLING

REMOVAL

4. Remove the two (2) screws holding the turntable
motor to the mounting plate of the oven cavity.
5
Pull the turntable coupling out of the oven cavity.
The
turntable motor is now free.
6.

Disconnect the oven from power supply.
Remove one (I ) screw holding the turntable motor
cover to the base cabinet and take off the turntable
motor cover.
3. Disconnect 2-pin connector from the turntable motor.
::

MAGNETRON
oven from power supply and remove
1. Disconnect
outer case.
2. Discharge the high voltage capacitor.
3. Disconnect wire leads from the magnetron.
Remove
the magnetron
temp.
fuse fitted
to
waveguide flange. And release the wire leads from
the hole of magnetron cooling duct (B). And release the AH sensor harness from hole of chassis
Remove four (4) screws holding
the
support.
chassis support to cooling
duct (A), waveguide,
rear cabinet, control back plate.
4. Release the tab on cooling duct (B) to hold cooling
duct (A).
5. Carefully remove four (4) mounting screws holding
the magnetron
to waveguide,
when remove the

CONVECTION

screws, a carefull attention should be necessary to
prevent the magnetron fall away.
6. Remove the magnetron
(with magnetron
cooling
duct(B))
from the unit with a careful attention the
magnetron tube should not hit by any metal object
around the tube.
7. Remove one (1) screw holding cooling duct (B) to
the magnetron.
8. Remove cooling duct (B) from the magnetron.
9. Now the magnetron is free.
CAUTION:
WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET
IS IN
PLACE
AND
THE
MAGNETRON
MOUNTING
SCREWS ARE TIGHTENED
SECURELY.

MOTOR

Disconnect
oven from power supply and remove
outer case.
Disharge the high voltage capacitor.
Remove sliding the thermal cut-out with its wire
lead on.
Disconnect
wire leads from the convection
motor
and convection
heater.
5. Disconnect the 2-pin connector from thermistor.
6. Remove eleven (11) screws holding the heater duct
to the oven cavity.
Remove two (2) screws holding the heater duct to
thermal protection plate (bottom).
8. The heater unit is now free.
9. Remove the four (4) screws holding the thermal
protection plate(left) to the heater duct.
1 O.The thermal protection
plate(left)
and sheet( left)
are now free.
11 .Remove three (3) screws holding the convection
motor mounting plate to the heater duct.
12.Pull the convection
motor shaft out of convection
fan.
13.Now the convection
motor with the motor mounting plate is free.

COOLING

REMOVAL

14.Remove two (2) nuts holding
the motor mounting
plate to the convection motor.
15.Convection
motor is now free.
Re-install
1. Re-install the convection
motor mounting
plate to
the convection
motor by the two (2) nuts.
2. Put the convection fan to the motor shaft.(fit with a
E-ring.)
3. Re-install the heater duct to the convection
motor
mounting plate by the three (3) screws.
4. Make sure the rotation of the convection
motor.
5. Re-install the thermal protection
plate to cover the
heatewr duct with sandwiching
the thermal protection sheet.
6. Re-install the heater unit to the left side of the oven
cavity by the eleven (11) screws.
Re-install
the
heater unit to thermal protection plate (buttom) by
two (2) screws.
7. Re-install the wire leads to the convection
motor,
convection
heater, thermister connector.
Refering to “Pictorial diagram”.
8. Re-install the thermal cut-out.

FAN MOTOR

1. Disconnect
oven from power supply and remove
outer case.
2. Discbarge the high voltage capacitor.
3. Disconnect wire leads from the cooling fan motor.
4. Release AH sensor harness from chassis support
and cooling duct (A).
5. Remove four (4) screws holding the chassis support to rear cabinet, cooling duct (A), waveguide
flange and control panel back plate.

REMOVAL

6. Release the tab on cooling duct (B) holding cooling
duct (A).
7. Remove duct (A) with the cooling fan motor from
the unit.
The cooling fan motor assembly is now free.
8. Remove the fan blade from the cooling fan motor
shaft by pulling out the fan retainer clip.
9. Remove two (2) screws and nuts holding cooling
fan motor to the cooling duct (A).
The cooling fan motor is now free.

R -8580

DAMPER

ASSEMBlY

1. Disconnect
oven from power supply and remove
outer case.
2. Discharge the high voltage capacitor.
3. Disconnect
wire leads from damper motor and
damper switch.
4. Do above the MAGNETRON
REMOVAL from No.3
to No.6.
5. Remove one (1) screw holding the magnetron air
guide to waveguide flange.
6. Remove the magnetron air guide.

CONVECTION
I.
2.
3.
4.
5.
6.
7.

REMOVAL

7. Raise the stopper of the damper shaft, and pull out
the damper shaft.
8. Pull the damper ass’y out of the thermal protection
plate( right).
9. Remove one (1) screw holding the motor to the
damper.
1 O-The damper is now free.
11 .Remove one (1) screw holding the damper switch
to the damper.
12.Now, the damper switch is free.

HEATER OR CONVECTION

8. Now the convection

Do CONVECTION
MOTOR REMOVAL from No.1
to No.10.
Remove five (5) screws holding the convection
air
guide (4-40,4-41,4-42,4-45)
to the heater duct.
Remove four (4) screws holding the convection
air
guide (4-38) to the heater duct.
The convection air guide is now free.
Remove two (2) screws holding heating element
holders to the heater duct and remove them.
Remove two (2) screws holding convection
heater
to heater duct.
Pull the convection
heater out of the heater duct.

UPPER LATCH SWITCH

heater is free.

CONVECTION
FAN
1. Do CONVECTION
MOTOR REMOVAL from No.1
to No.13.
2. Remove two (2) screws holding the shaft mounting
plate ass’y to the heater duct.
3. Pull the convection
fan and washer out of the
heater duct.
4. Convection fan is now free.

/ MONITOR

1. Disconnect
oven from power supplv
. . . and remove
outer case.
2. Discharge the high voltage capacitor.
3. Disconnect the wire leads from the switches.
4. Remove the one (1) screw holding the upper latch
hook to the oven flange.
5. Remove the upper latch hook assembly from oven
flange.
6. Push outward on the two (2) retaining tabs holding
the switch in place.
7. The switch is now free.

LOWER LATCH SWITCH

FAN REMOVAL

SWITCH

REMOVAL

Re-install
1. Re-install
each interlock switch in its place.
The
monitor switch is in the upper position and the upper latch switch is in the lower position.
2. Re-connect the wire leads to each switch.
Refer to the pictorial diagram.
3. Secure the upper latch hook (with the one (‘I )
mounting screw) to the oven flange.
4. Make sure that the monitor switch and upper
latch
. _
switch are operating properly.
Refer to chapter “Test Procedure” and “Adjustment
procedure”.
(RDA1203tJ)

AND STOP SWITCH

1. Disconnect
the oven from the power supply and
remove the outer case.
2. Discharge the high voltage capacitor.
3. Disconnect the wire leads from the switches.
4. Remove the one (1) screw holding the lower latch
hook to the oven cavity front frange.
5. Remove the lower latch hook from the flange by
moving it downward.
6. To remove the individual
switch from the lower
latch hook, push outward the two (2) retaining tabs
holding the switch in place.
7. The switch is now free.

REMOVAL

Re-install
1. Re-install
each interlock switch in its place.
The
stop switch is in the upper position and the lower
latch switch is in the lower position.
2. Re-connect the wire leads to each switch.
Refer to the pictorial diagram.
3. Secure the lower latch hook (with the one (1)
mounting screws) to the oven flange.
4. Make sure that the lower latch switch
and stop
switch are operating properly.
Refer to chapter “Test Procedure” and “Adjustment
procedure”.
(RDAl203U)
(RDA1203U)

CONTROL

PANEL ASSEMBLY

AND CPU UNIT REMOVAL
Replacement

The complete control panel should be removed for replacement of components
except the relay unit.
To remove the control panel, proceed as follows:
1, Disconnect
oven from power supply and remove
outer case.
2. Discharge the high voltage capacitor.
3. Disconnect the wire connectors and wire leads from
the relay unit and CPU unit.
4. Disconnect a connector from the CPU unit.
5. Remove one (I ) screw holding the control panel
back plate to the chassis support.
6. Remove the two (2) screws holding
the bottom
edge of the back plate to the cabinet base.
7. Remove one (I) screw holding the back plate to the
oven cavity flange.
8. Lift up and pull the control panel forward.

of individual

component

is as follows:

CPU UNIT AND KEY UNIT
I, Disconnect the wire connector of CPU unit from the
relay unit.
2. Remove the four (4) screws holding
the panel
frame to the back plate.
3. Separate the panel frame and back plate.
4. Remove the three (3) screws holding the CPU unit
to the panel frame.
5. Lift up the control unit and disconnect
the key
connector from the CPU unit.
6. Now, the CPU unit and frame assembly are separated.

UPPER LATCH/LOWER
LATCH/STOP SWITCHES
AND MONITOR SWITCH ADJUSTMENT
If the upper latch,lower
latch switches stop switch and
monitor
switch
do not operate properly
due to a
mis-adjustment,
the following
adjustment
should be
made.
1. Loosen the one (1) screw holding the upper Jatch
book to the oven cavity front flange and the one (1)
screw holding the lower latch hook to the same
flange.
2. With the door closed, adjust the lower latch book
by moving it back and forth and then adjust the
upper latch hook by moving it back and forth, or
In and out play of the door allowed
up and down.
by the upper and lower latch hooks should be less
than 0.5 mm. The vertical position of the upper
latch hook should be placed where the upper latch
switch and monitor switch have activated with the
door closed. Vertical adjustment of the lower latch
book is not possible.
3. Secure the screws with washers firmly.
4. Now, make sure of the upper latch switch operation. If the upper latch switch has not, activated with
the door closed, loose the one (1) screw holding
the upper latch book to the oven cavity front flange
and adjust the upper latch hook position.

2. The upper latch and lower latch switches interrupt
the circuit before the door can be opened.
3. The monitor switch contacts close when the door
is opened.
4. Re-install the outer case and check for microwave
leakage around the door with an approved microwave survey meter. (Refer to Microwave
Measurement Procedure.)

After the adjustment, make sure of the following:
1. The in and out play of the door remains less than
0.5 mm at latched position. First check the upper
latch hook position, pushing and pulling the upper
portion of door toward the oven face. Then check
the lower latch hook position, pushing and pulling
the lower portion of door toward the oven face.
Both results (plays of the door) should be less than
0.5mm.

Figure

C-l.

Latch

Switches

Adjustment
(RDAl203U)

R -8580

DOOR REPLACEMENT

DOOR ADJUSTMENT
When removing and/or loosening hinges such as in the
case of a door replacement, the following
adjustment
criteria are taken.
Door is adjusted to meet the following three conditions
before tightening
the binge
screws.

DOOR REPLACEMENT
1. Disconnect
oven from power supply and remove
outer case.
2. Holding the door, remove three (3) screws securing
the upper door hinge to the oven cavity. The door
assembly is nowfree from the oven cavity.
3. On re-installing
new door assembly, secure the door
assembly with the three (3) mounting screws to the
oven cavity.
Make sure the door is parallel with the bottom line
of the oven face plate and the latch heads pass
through the latch holes correctly.

Adjust door latch heads at a position where they
smoothly catch the latch hooks through the latch
holes. Refer to upper latch and lower latch switches
adjustments.
2. Deviation of the door alignment from the horizontal
line of cavity face to be less than 1 mm.
3. Door should be adjusted with its face depressed
toward cavity face.

Note: After any service to the door, .-an approved
microwave survey meter should be used to asmicrowave
with
proper
compliance
sure
rediation standard.
(Refer to Microwave
Measurement Procedure).

After hinge screws are tightened
ditions, recheck 1 and 2.

screw

OUTER

DOOR

TORX

LATCH

SCREW

under foregoing

con-

Note: The door on a microwave
oven is designed to
act as an electronic seal preventing the leakage
of microwave energy from the oven cavity during
This function
does not require
the cookcycle.
that the door be airtight, moisture condensation
tight or light-tigbt.
Therefore,
the occasional
appearance of moisture, light or the sensing of
gentle air movement around the oven door is not
abnormal and do not of themselves, indicate a
leakage of microwave
energy from the oven
cavity.
If such were the case, your oven could
not be equipped with a vent, the very purpose
of which is to exhaust the vapor-laden
air from
the oven cavity.

Note: If the Latch Heads Need Removal, “TORX T-20”
or “LHXTIX
LR-3” Type screwdriver
should be
used.

TORX

AND ADJUSTMENT

CASE CABINET

ASSEMBL

(T-20)

HEADS

OVEN

Figure

C-2. Door

Assembly

Replacement

FACE

PLATE

and Adjustment

(RDA1203U)

R -8580

MICROWAVE

MEASUREMENT

After adjustment
of door latch switches,
monitor
switch and door are completed individually
or collectively, the following
leakage test must be performed
with a survey instrument and it must be confirmed that
the result meets the requirements of the performance
standard for microwave oven.

2.
3.

REQUIREMENT
The safety switch must prevent microwave
radiation
emission in excess of 5mW/cm2 at any point 5cm or
more from external surface of the oven.

PREPARATION
FOR TESTING:
Before beginning
the actual test for leakage, proceed
as follows;
1. Make sure that the test instrument
is operating
normally as specified in its instruction booklet.
Important:
Survey instruments
that comply with the requirement for instrumentations
as prescribed by the performance standard for microwave
ovens must be
used for testing.

5.
6.

Recommended instruments are:
NARDA 8100
NAR DA 8200
HOLADAY HI 1500
SIMPSON 380M
Place the oven tray into the oven cavity.
Place the load of 275 +15ml of water initially at
20 &5 “C in the center of the oven tray. The water
container should be a low form of 600 ml beaker
with inside diameter of approx. 8.5cm and made of
an electrically
non-conductive
material such as
glass or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage is measured accurately.
Close the door and turn the oven ON with the timer
set for several minutes. If the water begins to boil
before the survey is completed,
replace it with
275ml of the cool water.
Move the probe slowly (not faster that 2.5cm/sec.)
along the gap.
The microwave radiation emission should be measured at any point of 5cm or more from the external
surface of the oven,
(RDBl103U)

R -8580

OIL>

11II II II II II-

I II I I I

I I

l---lIIIII

I II

t
E
it.-P
P
5
8

2
a
.
z
B
g
ii
F

R -8580

/
/

C
lC

R -8580

5
2 t
0 L. T.TM
I

F M.
I

CONV M
I

(dir
SW -*

P0Wef.q

OAMPM
I

Relay Unit

Control Unit

Figure S-3. Printed Wiring Board
I

PARTS
Note :

LIST

The voltage supplied to the parts ‘I*” are greater than 250V.
*

REF. NO.

Refer to “REPLACEMENT
1

PART

NO.

PARTS LIST” described

at after PARTS LIST.
DESCRIPTION

I
ELECTRICAL

l- 2
;I ;
l- 5
l- 6
l- 7
l- 8
l- 9
l-10
l-11
l-12
l-13
l-14
l-15
l-16
l-17
l-18
l-19
l-20
l-21
l-22
l-23
l-24

2- 1

Power supply cord
Monitor switch
Fuse holder
Magnetron
temp. fuse
Damper switch and stop
Upper latch switch
Thermal cut-out
Oven lamp
Oven lamp socket
Turntable motor
Damper motor
Convection
motor
Cooling fan motor
Convection
heater
Power transformer

RC-QZA029WREO
RH-DZA008WREO
RV-MZA008WREO
FH-HZAOOSWREO
FDTCTAOSOWRKO
QSW-MA018WREO
RR-WZ0025WREO
RH-DZA012WREO
QFS-CAOlOWREO

High voltage capacitor
High voltage rectifier
Magnetron
Thermistor
AH sensor
Lower latch switch
Monitor resistor
Rectifier
Fuse (M8A)

221 ;
;I ;
2- 6
7
2- 8
2- 9
2-10
2-11
2-12
2-13
2-14
2-15
2-15A
2-15B
2:15C

FDAI-A066WRYO
GCOVHA092WRWO
GLEGP0009YBEO
PREF-A002WREO
GCABDA027WRWO
PCUSU0263WRPO
LSTPP0008YBFO
LSTPP0009YBFO
GCABUA141WRSO
PCUSU0337WRPO
TMAPCA302WRRO
GCOVAA081WRWO
LBSHC0032WREO
LHLDKOOOSYBFO
FFTASA014WRKO
GFTASA014WRPO
PCUSGA077WRPO
PSLDPAOOlWRPO

333333c2
c3

1
1A
1B
1c
1D
1F

E&7,20
C31,C65
c51-c53
c7o,c75

CPWBFA095WRKO
QCNCMA086DREO
QCNCMA040DREO
QCNCMA039DREO
QCNCWA030DREO
RV-KXA002DREO
RC-KZA032DREO
RC-EZA131DREO
RC-EZAOGlDREO
RC-KZA004DREO

tape
PANEL

1
1'
1
1
1
i
1

AW
AW
AY

BQ
AY
AK
BL
AV
BB
AF
AH
AQ
AE

1
1
4
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1

AX
AC
AB
AD
AV
AA
AC
AC
BC
AA
AC
AF
AB
AB
AH
AG
AC
AB

1
1
1
1
1
1
1
1
1
10

BV
Al3
AC
AB
AE
BC
AB
AE
AB
AA

PARTS

Control unit
14-pin connector
(D)
6-pin connector
(E)
3-pin connector
(F)
12-pin connector
(G)
Fluorescent
display tube
Capacitor
0.1 I.~F 5OV
Capacitor
1000 PF 35V
Capacitor
4.7 CIF 5OV
Capacitor
0.015 I.IF 25V

1
1
1
1
1
1
1
1
1
1

AR
AF
AE
AG
AH
AF
AG
AN
AH
AW

PARTS

Vibration proof cushion
Cord anchorage
(upper)
Cord anchorage
(lower)
Outer case cabinet
Shading cushion
Schematic
diagram
Base cover
Cord bushing
Cord holder

CONTROL

1
1
1
1
2

switch

Base cabinet
Turntable motor cover
Foot
Reflection
sheet
Rear cabinet

Cushion
Reflection

ICODE

PARTS

QACCA0032WREO
QSW-MA017WREO
QFSHDA002WREO
QFS-T0023WREO
QSW-M0174WREO
QSW-MA020WREO
RTHM-0054WREO
RLMPT0018WREO
QSOCLAOOlWREO
RMOTDA048WREO
RMOTDA043WREO
RMOTEA070WREO
RMOTEA017WREO
RHET-A030WREO
RTRN-A139WREO

CABINET

1 Q’TY

R -8580

Note :

The voltage supplied
*

REF. NO.

to the parts RI,, are greater than 25OV.

Refer to “REPLACEMENT
PART

PARTS LIST” described

at after PARTS LIST.

NO.

DESCRIPTION

C6
c9
Cl0
c30
c50

RC-EZA059DREO
RC-EZA057DREO
RC-EZA058DREO
RC-EZAOGODREO
RC-KZ104QDREO

Capacitor
Capacitor
Capacitor
Capacitor
Capacitor

C80
C81
CFl
Dl-D5,
D8-DlO

RC-EZA063DREO
RC-EZA062DREO
RCRS-A003DREO
RH-DZA029DREO

Capacitor
0.47 PF
Capacitor
3.3 PF
Ceramic filter(4.0MHZ)
Diode(lN4002)

ICl
IC2
Q1
Q30,Q41,
Q8L

COD1

1
1
1
1
1

A3
AB
A3
AB
AB

50V
50V

1
1
1
8

AB
AB
AF
AA

1
1
1
7

AW
AE
AC
AC

2
1
1
1
1
1
16

AB
AC
AC
AA
AA
AA
AA

2
2
1
1
1
1
1
5'

AA
AA
AA
AD
AA
AA
AA
AA
AA

1
1
3

AA
AA
AA

Resistor block(lOOk
nx4)
Resistor block(27k
nx6)
Resistor block(56k
nx15)
Zener diode (RD16EB3)
Zener diode (RD5.1EB3)
Zener diode (RD3.6EL2)
Relay unit

1
1
1
1
1
1
1

AB
AC
AD
AB
A3
AB
BG

QCNCMA108DREO
QCNCMA115DREO
QCNCMA109DREO
RC-KZA032DREO
RH-DZA024DREO

7-pin connector(A)
3-pin connector(B)
14-pin connecto;
~s;;mbglgyv(C)
Capacitor
Diode (US106OM)
.

;
1
1
8

AE
AF
AL
AB
AA

RH-TX825AKREO
RR-DZ154NDREO
RR-DZ471NDREO
RR-DZ103NDREO
RRLY-A013DREO
RALM-A008DREO
RTRNPA025DREO

Transistor
2SA937(Q)
Resistor
150k fl 1/4W
Resistor
470 n 1/4w
Resistor
10k 0 1/4W
Relay OMI-SH112D
Buzzer PKM3OSP
Transformertfor
control unit)

RH-IZA096DREO
RH-IZ0021WREO
RH-TZA035DREO
RH-TZA046DREO

PF
PF
FF
PF
~JF

Q’TY

25V
16V
25V
16V
25V

D7,20,51RH-DZA024DREO
D52,D70,
D80-D83,
D91,D92,
D94-D99,

10
100
22
47
0.1

Diode(US1060M)

LSI-IC(IR94558)
Transistor
2SB793(Q,R)
Transistor
DTA143ES

Q83-Q86,

Q50,QlOORH-TZA044DREO
RH-TZA047DREO
g88;
RH-TZA051DREO
Rl
RR-DZ331NDREO
R2
RR-SZ820RDREO
R3
RR-DZ561PDREO
R21,R55,RR-DZ103NDREO
R56
R91,R92,
R94-R99,
RlOO
-R104
R22,R54,RR-DZ473NDREO
R23,R31
RR-DZ153NDREO
RR-DZ471NDREO
R30
R50
RR-DZA069DREO
RR-DZ331PDREO
R51
R52
RR-NZ182NDREO
RR-NZ304NDREO
R53
RR-NZ151NDREO
R65
R66,R71,RR-DZ102NDREO
R76,R80,
R203
R67
RR-NZ362NDREO
R68
RR-DZ184NDREO
R70,R75,RR-DZ273NDREO
Rlll
R90
RR-DZA052DREO
2110
RR-DZA027DREO
3112
RR-DZA030DREO
ZDl
RH-EZAOSODREO
zD2
RH-EZA051DREO
zD30
RH-EZA052DREO
DPWBFA276WRKO
3-2
3-2A
3-2B
3-2C
11
184,
1180-186
240
140
141
142
IYl-RY6
?P40
I?1
.

Transistor
Transistor
Transistor
Resistor
Resistor
Resistor
Resistor

2SA933S
DTA114Y
DTD143A
330 n1/4w
82f2
1w
560 0 1/2W
10k R 1/4W

Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor

47k n1/4W
15k R 1/4W
470 n 1/4w
block(RNAF9T)
330 n1/2w
1.8k a(F) 1/4W
300k n(F) 1/4W
150 R(F) 1/4W
l.Ok n 1/4W

Resistor
Resistor
Resistor

3.6k a(F) 1/4W
180k Q 1/4W
27k n 1/4W

1
1
1
1
6
i

AB
AA
AA
AA
AM
AH
AT

R-8580

Note :

The
*I

REF. NO.

oltage supplied

to the parts ,,*” are greater than 250V.

?fer to “REPLACEMENT
PART

PARTS LIST” described

at after PARTS LIST.

RH-VZA009DREO
HPNLCA378WRJO
GMADIA031WRRO
DUNTKA184WREO
LANGTA046WRWO

Varistor
14DK471J
Control panel frame
Display filter
Key unit
Key unit angle

3- 7
3- 8

LCHSMA022WRWO
XCTSD40P12000

3- 9
3-10

XHPSD30P12XSO
LX-BZ0198WREO

Control panel back plate
Screw; Key unit angle and control
back plate mtg.
Screw; cpu unit mtg.
Screw; relay unit mtg.

444444;z

1
2
2A
3
4
5
7

4- 8
4- 9
4-10
4-10A
4-11
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
4-28
4-29
4-30
4-31
4-32
4-33
4-34
4-35
4-36
4-37
4-38
4-39
4-40
4-41
4-42
4-43
4-44
4-45
Cl-46
g-47
g-48
2-49
a-50
2-51
2-52
2-53

panel

i
1
1
4

AL
AA

6
2

1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1

BR
AR
AE
AF
AU
AN
AG
AG
AH
AQ
AF
AA
AF
AF
AF
AG
AC

i
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1

Fig
AA
AA
AT
AN
AP
AH
AG
AF
A3
A3
AC
AF
AE
AE
AA
AC
AG
AE
AE
AE
AG
AD
A3
A3
AC
AE

PARTS

PCUSUA083WRPO
FFANMA004WRKO
FREFHAOOGWRKO
PREFHA014WRWO
PFPF-A018WREO
PFPF-A019WREO
NBRGPAOOlWREO
PPACGA025WRFO
LANGTA121WRWO
LBNDKA029WREO
FANGTA056WRYO
LANGQA068WRWO
PFTA-A009WRWO
NSFTTA017WRMO
MCAMPA015WRFO
FHNG-A045WRYO
MHNG-0123WRM0
PCOVPA018WRWO
PGIDHA009WRWO
PGIDHA021WRWO
PGIDHAOllWRPO
PSKR-A067WRWO
PSKR-A068WRWO
PSKR-A069WRWO
PSKR-A070WRWO

Oven cavity
Turntable
roller stay
Turntable
support roller
Turntable
coupling
Turntable tray
Lamp filter
Waveguide
cover
Magnetron
cooling duct(A)
Magnetron
cooling duct(B)
Heater duct
Fan blade ass'y
Fan retainer clip
Chassis support
Upper latch hook
Monitor switch lever
Lower latch hook
Stop switch lever
Oven support angle
Steam duct
Steam duct cushion
(C)
Steam cushion
Convection
fan ass'y
Thermal protection
ass'y(left)
Thermal protection
plate(right)
Thermal protection
sheet(left)
Thermal protection
sheet(right)
Bearing
Bearing packing
Thermal protection
plate (for convection
Heating element holder
Shaft mounting plate ass'y
Convection
motor mounting plate
Damper
Damper shaft
Damper cam
Oven hinge(lower)
Oven hinge(upper)
Sensor cover
Convection
air guide (A)
Convection
air guide (3)
Magnetron
air guide
Convection
air guide (upper)(C)
Convection
air guide (inside)(D)
Convection
air guide (lower)(E)
Air barrier
(right)(F)

PSKR-A079WRWO
PSKR-A080WRWO
PCUSUA083WRPO
PCUSUA082WRPO
PSPA-A021WRFO

Air barrier
(right)(F)
Convection
air guide (H)
Steam duct cushion
Damper cushion
Spacer

PREFHA019WRWO
PCUSUA085WRPO
PCUSUA084WRPO
PCUSG0078YBPO
PFPF-A024WREO

Thermal protection
Steam cushion (3)
Air guide cushion
Spacer cushion
Thermal protection

FOVN-A090WRYO
FROLPA008WRKO
NROLPAOlOWREO
NCPL-A016WRFO
NTNT-AOOSWRHO
PFILWA008WRPO
PCOVPA050WREO
PDUC-0300WRF0
PDUC-A144WRFO
PDUC-A196WRWO
FFANJ0034WRKO
LSTY-0030WRE0
LANGFA056WRWO
LANGKA193WRFO
MLEVF0124WREO
LANGKA194WRFO
MELVPA081WRFO
LANGF0296WRPO
FDUC-A058WRWO
PCUSU0380WRPO

CODE

AE
AT
AH
AX
AK

1
1

VRSl
3- 3
3- 4
3- 5
3- 6

OVEN

Q’TY

DESCRIPTION

NO.

plate

motor)

1
1
1
1
1
1
3'

(bottom)
i
1
3

sheet

(right

AC
A3
AA
AA
AC
AM
AA
AA
AA
AC

R -8580

The voltage supplied

Note

*
REF. NO.

to the parts n*w are greater than 250V.

Refer to “REPLACEMENT
PART

PARTS LIST” described

at after PARTS LIST.

NO.

DESCRIPTION

Q’TY

ZODI

1
1
1
1
1

AC
AK
AB
AG
AG

Round insulator
(A)
Round insulator
(B)
Oven lamp socket mounting plate
Thermal protection
sheet (C)
Capacitor
mounting bracket

;
1
1
1

AD
AD
AC
AE
AC

Capacitor

4-54
4-55
4-56
4-57
4-58

PFPF-A025WREO
PFPF-A026WREO
PCUSU0326WRPO
PGISHA024WREO
PGISHA025WREO

Thermal protection
sheet
Thermal protection
sheet
Cushion
Heater insulator
(A)
Heater insulator
(B)

4-59
4-60
4-61
4-62
4-63
4-64

PGISHAO26WREO
PGISHA027WREO
LANGQA096WRPO
PFPF-A040WREO
LANGQ0255WRWO
LBNDK0035WRPO

(right B)
(bottom)

holder
DOOR

PARTS

1
2
3
4

CDORFA238WRKO
FANGTA051WRYO
FLEVFOlOGWRYO
LSTPPA018WRFO
LSTPPA019WRFO

Door assembly
Latch plate
Joint lever
Upper latch head
Lower latch head

1
1
1
1
1

BS
AG
AD
AC
AC

5- 5
5- 6
5- 7
5- 8
5- 9
5-10
5-11
5-12
5-13
5-14
15-15

MSPRT0059WREO
HDECQA075WRFO
HDECQA074WRFO
HDECQA072WREO
HDECQA073WREO
DDORFA115WRYO
PGLSPA106WREO
PPACG0105WREO
GCOVHA104WRFO
HDECQA076WRFO
HDECAA072WREO

Latch
Door
Door
Door
Door
Door
Door
Door
Choke
Door
Door

1
1
1
1
1
1
1
2
1
1
1

AC
AG
AF

5
5555-

spring
sash right
sash left
sash upper
sash lower
panel ass'y
glass
packing
cover
handle
decolation plate

left

AM
BF
AY
AA
AK
AH
AE

MISCELLANEOUS

*
*

66666666-

1
2
3
4
5
6
7
8

661109
6-11
6-13
6-14
6-15

FAMI-A008WREO
FAMI-A009WREO
QW-HZ0059WREO
QW-QZ0114WREO
FW-VZA396WREO
TSPCNA664WRR2
FW-VZA398WREO
LBNDCQ004CBEO
LHLDWQ004YBEO
QTANP0020YBEO
TCAUH0114WRRO
TCADC0222WRRO
TINSEA295WRRO
LHLDWQOOSYBEO

Low rack
High rack
High voltage wire A (Trans-Capa.)
High voltage wire B (Mag-Capa.)
Main wire harness
Name plate
Thermistor
harness
Wire holder (WH-l.,"M")
Wire holder (purse look "L")
Connector
Caution label
Cook book
Operation
manual
Wire holder (purse 1ock"LL")
SCREW,

7- 1
7- 2

LX-CZ0050WREO
LX-CZ0017WREO

7- 3
7- 4

XCPSD40P06000
LX-CZ0043WREO

7- 5

LX-NZ0081WREO
XCPWW3OP12XWO
XBPSD30P14KOO
XCPSD30P06000
LX-BZ0207WREO
LX-NZ0029YBEO

;I ;
;I "9
7-10
7-11
7-12
7-13

XBTSD40P08000
XBTUW40P06000
XBTUW40P08000

NUTS,

WASHERS

Screw;
Screw;

AND

AS
AS
AD
AE
AV
AC
AK
AA
AA
AC
BA
AL

PINS

door handle mtg.
convection
air guide
(A),(B),(C),(D),(H)and
thermistor mtg.
Screw; spacer mtg.
Screw; shaft mounting plate,
convection motor mounting plate, and
thremal protection
platetleft)mtg.
Nut; convection motor mtg.
Screw; heating element holder mtg.
Screw; damper switch mtg.
Screw; damper motor and AH sensor mtg.
Screw; oven lamp socket mtg.
Nut; steam duct ass'y and thermal
protection
plate(right)mtg.
Screw; steam duct ass'y mtg
Screw; waveguide
cover mtg.
Screw; thermal protection
platecright),

1
1
1
1
1
1
1
1
1
1
1
1
1
1

3
13
3
10

2
2
1

2’

3
17

R -8580

Note :

The voltage
*

REF. NO.

supplied

to the parts “*,, are greater than 250V.

Refer to “REPLACEMENT
PART

PARTS LIST” described

DESCRIPTION

7-14

XCPSD40P08000

7-15
7-16
7-17
7-18
7-19

XCTSD40P12000
Screw;
LX-BZ0141WREO
Screw;
XBPSD40P25000
Screw;
XWHTZ30-05081Washer;
XFPSD40P08000
Screw;

7-20
7-21

XCTWW40PlOOOO
LX-BZ0186WREO

7-22
7-23

XCTSD40P08000
LX-CZ0052WREO

7-24
7-25
7-26
7-27
7-28
7-29
7-30

LX-CZ0063WREO
XREUW30-06000

7-31
7-32
7-33
7-34
7-35
7-36
7-37
7-38

at after PARTS LIST.

NO.

XCPSD30PlOOOO
XBPSD50P12KOO
LX-CZA020WREO
LX-BZA036WREO
XWHSD50-08000
XNESD40-32000
XBPSDGOP14KSO
XWVSD60-07000
LX-BZA055WREO
XHSSB40P08000
XCTSD40P12000
XCPSD40P27000
XBTUW40P12000

Screw;

CI’TY

steamduct
ass'y, heating element unit
and heating element mtg.
thermal protection
plate(bottom),
convection
air guidecright),
ven support angle, AH sensor cover mtg.
base cabinet mtg.
monitor switch lever mtg.
cooling fan motor mtg.
convection
fan ass'y mtg.
turntable
motor mtg.

Screw;
Screw;

waveguide
cover mtg.
High voltage capacitor holder mtg.
Base cabinet, monitor resistor,
High voltage capacitor ass'y,
turntable
motor cover mtg.
Screw; magnetron
air guide
Screw; rear cabinet, upper and lower
latch hook mtg
Screw; magnetron
cooling duck (B)mtg
Ring; convection
motor mtg
Screw; oven lamp socket mounting plate mtg.
Screw; magnetron
mtg.
Screw; upper and lower oven hinge mtg.
Screw; cabinet mtg.
Washer; monitor switch lever mtg.
Nut; cooling fan motor mtg.
Screw; power transformer
mtg
Washer ; power transformer
mtg.
Screw; cabinet mtg.
Screw; oven lamp access cover ass'y mtg.
Screw; cord holder mtg.
Screw; cord anchorage mtg.
Screw; convection
heater mtg.
HOW TO ORDER

To have your order filled

promptly

REPLACEMENT

and correctly,

1. MODEL NUMBER
3. PART NO.

CODI

3
1
2
1
2

AA
AA
AA
AA
AA

3
13

AA
AA

1
6

AA
AA

1
1

AA
AA

ii
6
8
1
2
2
1
2
1
1
2
2

AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA

PARTS

please furnish

the following

information.

2. REF. NO.
4. DESCRIPTION
(RDP1303U)

R -8580

REPLACEMENT

PARTS LIST

This replacement parts list shows interchangeability
of marked ( * ) parts on the control panel parts to the alterations
of product locations.
This list has been prepared to show LISTED PART NO. along with the USED PART NO. side by side.
(RDQI 101 U)

NOTE :
Common resistors have been omited from this parts list, such as 1/4W
patibility list and cross referrence information.

I
I

/ RR-DZ102DDREO

PART CODE LISTED

carbon

DESCRIPTION

resistors below

is a com-

1/4W 1 Ok Q small shape carbon film
I

VRD-ST2EF102J
VRD-ST2HAlOl

RR-DZl 01 PDREO

I t i

PART CODE COMPATIBLE
VRO-ST2OF103J

RR-DZl03NDREO

and 1/2W

/ 1/4W 1 .Ok R carbon film.
J

1/2W 100 f2 carbon film.

1 t
3

PART CODE LISTED
“1.D :
Carbon film resistor.
1/4W and small shape.
“2.N :
1/4w.
D:
P:
1/2w.
“3.D :
Carbon film resistor.
“4.D :
1/4W and small shape.
E:
1/4W.
H:
1/2w.

(RDQ1102U)

R-8580

A
x
9
a

-1

,
I

,
5

R-8580

CONTROL

PANEL

PARTS

\\
Iri
0
p
1,
*
8
II
iP
I
1
5

3-r
9

3-2

‘Y
\‘\
k4
4
J/I
I”
//’
DOOR

ASSEMBLY

MISCELLANEOUS
6-3

6- I

Trans.

6-10

R-8580

\
I
,

PACKING

AND

ACCESSORIES

[TRAY
PACKING
FOAM
a (SPADP0328WREO)

WI Not

Redaceble

Item

/
1

R -8580

(RDXI 101 U)

SHARP

‘87

0 SHARP CORP. (9U0.75E)

Printed in Australia

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.2
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Creator                         : Acrobat Capture Server 2.0
Create Date                     : Thursday, June 04, 1998 6:24:16 PM
Title                           : Unknown
Author                          : sharp
Producer                        : Acrobat PDFWriter 3.01 for Windows
Subject                         : 
Modify Date                     : 1998:06:04 18:30:17
Page Count                      : 51

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Sharp Microwave Oven R 8580 Users Manual Unknown

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