Page 1
SUPPLEMENTAL
R-430BK
R-430BW
R-430BD
SHARF?
R-430BW
SERVICE MANUAL
S38Mi 07R430BE
MICROWAVE OVEN MODELS
R-430BK/R-430BW / R-430BD
In the interest of user-safety the oven is to be restored
to its original condition and only the parts identical to
those specified should be used.
WARNING TO SERVICE PERSONNEL: Microwave
ovens contain circuitry capable of producing
very high voltage and current. Contact with the
following parts may result in a severe, possibly
fatal electrical shock.(High Voltage Capacitor,
High Voltage Power Transformer, Magnetron,
High Voltage Rectifier Assembly, High Voltage
Harness etc..)
This is a supplemental Service Manual for Microwave Oven models R-430BK, R-430BW & R-430BD
These models are quite similar to the Base Model R-420BK (S/M#S28M104R420BE ).
This supplemental manual must be used in conjunction with the base model service manual for complete operation, service,
safety and replacement parts information.
TABLE OF CONTENTS
SECTION
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY.
Before Servicing
Warning to Service Personnel
Forewordandwarning ....................................................................... 2
Specifications ...............................................................................
KeyUnitLayout .............................................................................
Operation ..................................................................................
Servicing and Troubleshooting Guide .......................................................... 6
TestProcedures .............................................................................
TouchControlOutline .......................................................................
Component Replacement and Adjustment Procedure
Microwave Measurement Procedure
Schematic / Wiring Diagram ................................................................. 23
Parts .....................................................................................
Packing and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
.............................................................
................................................................. 1
...........................................
.......................................................... 22
........... Inside Front Cover
Inside Front Cover
PAGE
3
4
5
7
13
18
28
SHARP ELECTRONICS CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
Page 2
R-430BK
R-430BW
R-430BD
Do not operate or allow the oven to be operated with the door open.
a
( 1
Make the following safety checks on all ovens to be serviced before activating the magnetron
(b)
or other microwave source, and make repairs as necessary: (1) Interlock operation, (2) proper
door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to
or loosening of hinges and latches, (5) evidence of dropping or abuse.
C
Before turning on microwave power for any service test or inspection within the microwave gen-
( )
erating compartments, check the magnetron, waveguide or transmission line, and cavity for
proper alignment, integrity, and connections.
Any defective or misadjusted components in the interlock, monitor, door seal, and microwave
(d)
generation and transmission systems shall be repaired, replaced, or adjusted by procedures
described in this manual before the oven is released to the owner.
A microwave leakage check to verify compliance with the Federal Performance Standard
e
( )
should be performed on each oven prior to releasing the oven to the owner.
(RD21101U)
Before servicing an operative unit, perform a microwave emission check as per the Microwave
Measurement Procedure outlined in this service manual. If microwave emissions level is in excess
of the specified limit, contact SHARP ELECTRONICS CORPORATION immediately @
I-800-237-4277.
If the unit operates with the door open, service person should 1) tell the user not to operate the oven
and 2) contact SHARP ELECTRONICS CORPORATION and DHHS immediately.
Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit
found with emissions in excess of 4mW/cm2e The owner of the unit should be instructed not to use
the unit until the oven has been brought into compliance.
(RD81001 U)
Page 3
SERVICE MANUAL
SHARI?
Microwave Ovens
R=430BK/R=430BW/R=43OBD
Foreword
This manual has been prepared to provide Sharp
Electronics Corporation personnel with complete
operation and service information for Sharp microwave
oven models R-430BWR=430BW/R=430BD.
It is recommended that service personnel carefully
study the entire text of this manual so they will be
qualified to render satisfactory customer service.
Check interlock switches and the door seal carefully.
Special attention must be given to avoid electrical shock
. and microwave radiation hazards.
Specifications
General Information
Key Unit Layout
This supplemental service manual contains update information only. Please refer to base model
service manual (R-420BK) for complete service information
WARNING
Never operate the oven until the following points are ensured:
(A)The door is tightly closed.
(B)The door brackets and hinges are not defective.
(C)The door packing is not damaged.
(D)The door is not deformed or warped.
(E)There are no other visible signs of damage to the
oven.
DANGER
Certain initial parts are intentionally not grounded
and present a risk of electrical shock only during
servicing. Service personnel - Do not contact the fol-
lowing parts while the appliance is energized;
High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly and High voltage Harness.
If provided, Vent Hood, Fan Assembly and Cooling
Fan motor.
All of the parts marked
ages more than 25OV.
Removal of the outer case cabinet gives access to volt-
age above 250V.
All of the parts marked “A” on parts list may cause undue
microwave exposure, by themselves, or when they are
damaged, loosened or removed.
“*” on parts list are used at volt-
Operation
Test Procedures
Touch Control Panel
and Adjustment
Microwave Measurement
Schematic Diaaram / Wirina
Sharp Electronics Corporation
Sharp Plaza
Mahwah, New Jersey 07430-2135
Page 4
R-430BK
R-430BW
R-430BD
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of
producing very high voltage and current. Contact with following parts may result in a severe,
possibly fatal, electrical shock.
(EXAMPLE)
High Voltage Capacitor, High Voltage Power
Transformer, Magnetron, High Voltage Rectifier
Assembly, High Voltage Harness etc..
Read the Service Manual carefully and follow all
instructions.
Before Servicing
Danger High Voltage
1. Disconnect the power supply cord and then remove
outer case
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
WARNING:RlSK OF ELECTRICAL SHOCK. DISCHARGE
THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING.
The high-voltage capacitor remains charged about 60 se-
conds after the oven has been switched off. Wait for 60 seconds and then short-circuit the connection of the high voltage capacitor (that is the connecting lead of the high voltage
rectifier) against the chassis with the use of an insulated
screwdriver.
Whenever troubleshooting is performed, the power sup-
ply must be disconnected. In some cases it may be nec-
essary to connect the power supply after the outer case
has been removed, in this event:
1.
Disconnect the power supply cord, and then remove
outer case cabinet.
2.
Open the door and block it open.
Discharge the high voltage capacitor.
3.
4.
Disconnect the leads to the primary of the power
transformer.
5.
Ensure that the leads remain isolated from other
components and oven chassis by using insulation
tape.
After the above procedure, reconnect the power sup-
6.
ply cord.
When the testing is completed
1. Disconnect the power supply cord and then remove
outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4.
Reconnect the leads to the primary of the power
transformer.
Re-install the outer case cabinet.
5.
6. Reconnect the power supply cord after the outer
case cabinet is installed.
7. Start the oven and check all functions.
After repairing
1. Reconnect all leads removed from components during testing.
2. Re-install the outer case (cabinet).
. Reconnect the power supply cord after the outer
3
case is installed.
4. Reconnect the power supply cord after the outer
case is installed.
Run the oven and check all functions.
5.
Microwave ovens should not be operated empty. To test
for the presence of microwave energy within a cavity,
place a cup of cold water on the oven turntable, close the
door and set the power to HIGH and set the microwave
timer for two (2) minutes When the two minutes has
elapsed (timer at zero), carefully check to see if the water is hot. If the water remains cold, carry out Before
Servicing procedure and re-examine the connection to
the component being tested.
When all service work is completed and the oven is fully
assembled, the microwave power output should be
checked and the microwave leakage test should be car-
ried out.
Page 5
SPECIFICATIONS
R-430BK
R-430BW
R-430BD
Item
Power Requirements
Power Output
Case Dimensions
Cooking Cavity
1.3 Cu.Ft.
Control Complement
Description
120 Volts
14 Amperes
1650 Watts
60 Hertz
Single phase, 3 wire grounded
1100 watts (IEC-705 Test Procedure)
Operating frequency of 2450 MHz
Width 21 ll&”
Height 1231;’ (including feet)
Depth 1731~”
Width 15”
Height 817/&
Depth 1631;’
Tray Size 141/i’ Diameter
Touch Control System
Clock (I:00 - 12:59)
Timer (0 - 99 min. 99 sec.)
Microwave Power for variable cooking
Repetition Rate;
(HIGH) . . . s . . . . . Full power throughout the cooking time
P-HI
P-90 , . . . . . . . . . . . . . . . .
P-80 . . . . . . . . . . . , . . . . .
P-70 (MED HIGH) . . . . approx. 70% of full power
P-60 . . . . . . . . . . . , . . . . . approx. 60% of full power
P-50 (MED) . . . . . . . . . .
P-40 , . . . . , . . . . . . . . . . .
P-30 (MED LOW) . . . . . approx. 30% of full power
P-20 . * . . . . . . . . . . . . . . .
P-IO . . . . . . . . . , . . . . . . .
P-O................... No power throughout the cooking time
approx. 90% of full power
approx. 80% of full power
approx. 50% of full power
approx. 40% of full power
approx. 20% of full power
approx. 10% of full power
Oven Cavity Light
Safety Standard
FEATURES
Instant Action
Compu Defrost
Sensor Cook
Minute Plus
Kitchen Timer
Variable Power (10)
4 Stage Cooking
Yes
UL Listed
FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
Page 6
R-430BK
R-430BW
R-430BD
Key Unit Layout
a. Indicators.
b. Lighted digital display.
c. Custom Help.
Features user friendly communications during
cooking procedure.
d. SENSOR COOKING pads.
Cooking time is determined by AH Sensor
e. Minute Plus pad.
Touch to start oven or Touch to cook for 1
minute at 100% power or to increase cooking time.
f. Compu Cook pad.
Touch to cook certain foods.
g, Compu Defrost pad.
Touch to defrost certain foods.
h. Number selection pads.
i. Power Level pad. Touch to select micro-
wave power setting.
j. Clock pad.
Touch to set clock.
k. Beverage Center pad.
Touch to Reheat certain beverages.
I. Stop/Clear pad.
Touch to erase during programming.
Touch once to stop operation of oven during
cooking.
Touch twice to cancel cooking program.
m. Kitchen Timer pad.
Touch to set minute function.
n. Start/Touch On pad.
Touch to start oven.
,.
,:
., j : : ;. ‘,. ‘.
jj&&p
Custom,
. . . ‘::‘: :
,: ,I: ‘1, ,,,, ;, 1 “: i::‘-
. .
‘.
/ SENSOR COOKING-
I I
a
-0
b
-0
C
-0
d
-0
I I /
Page 7
OPERATION
DESCRIPTION OF OPERATING SEQUENCE
The following is a description
during oven ope ration.
of compon
ent functions
Sensor Cooking Condition
When using the REHEAT 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 the power level needed for
1 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 is inputted into the
LSI.
The following is an example of how the AH Sensor
Works:
3. Sensor detects moisture and humidity and calculates cooking time and variable power level.
Cooking Sequence
1. Touch REHEAT pad.
Note: The oven should not be operated in either mode
immediately after plugging in the unit. Wait five
minutes before cooking in sensor mode.
The coil to the shut off relay (RY-1) is energized, the
2.
oven lamp, turntable motor and cooling fan motor are
turned on and the power transformer remains off.
1. Potatoes at room temperature
Vapor is emitted very slowly.
2. Heated potatoes. Moisture and humidity is emitted
rapidly. You can smell the aroma as it cooks.
3. After about 16 seconds, the cook relay (RY-2) is energized. The power transformer is turned on, microwave energy is produced and first stage cooking is
started.
Note: The 16 second delay is for cooling time required
to remove any vapor from the oven cavity and
sensor. During this first stage, do not open the
oven door or touch the STOP/CLEAR pad.
4.
When the sensor detects the vapor emitted from the
food, the display switches over the remaining cook-
ing time and the timer counts down to zero.
At this time, the door may be opened to stir food, turn
it or season, etc.
5.
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.
By opening the door or touching the STOP/CLEAR
6.
pad, the time of day will re-appear on the display and
the oven will revert to an OFF condition.
Page 8
R-430BK
R-430BW
R-430BD
When troubleshooting the microwave oven, it is helpful 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.
Before replacing a blown monitor fuse, test the door sensing switch, primary interlock relay, secondary interlock switch and monitor switch for proper operation.
tion.)
Whenever troubleshooting is performed, the power supply must be disconnected. In some cases it may be neces-
sary to connect the power supply after the outer case cabinet has been removed. In this event,
1.
Disconnect the power supply cord, and then remove outer case cabinet.
Open the door and block it open.
2.
Discharge the high voltage capacitor.
3.
Disconnect the leads to the primary of the power transformer.
4.
5. Ensure that the leads remain isolated from other components and oven chassis by using insulated tape.
After the above procedure install the outer case cabinet, reconnect the power supply cord.
6.
(Refer to “Test Procedure” sec-
When the testing is completed
Disconnect the power supply cord, and then remove outer case
1.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Reconnect the leads to the primary of the power transformer.
5. Re-install the outer case (cabinet).
Reconnect the power supply cord after the outer case is installed.
6.
7. Run the oven and check all functions.
Troubleshooting Guide
Sensor Cooking Condition
Problem
The oven is in the sensor cooking Control Unit
condition but AH sensor does not end
or AH sensor turns off about a maxi-
mum of 30 minutes after start.
When a cup of water is heated by AH Sensor
sensor, the oven does not shut off
when the water is boiling.
Possible Cause
Test Procedure
Procedure G
Procedure L
Page 9
Procedure Letter Component Test
.
G
Touch Control Panel Assembly Test
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper maintenance can not be performed with only a
voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into two
control units, Control Unit and Key Unit. Troubleshooting by unit replacement is described according
to the symptoms indicated.
Before testing
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that these leads remain isolated from other components and oven chassis by using insulated tape.
6. After that procedure, re-connect the power supply cord.
1. Key Unit
1. Disconnect the power supply cord, and then remove outer case cabinet
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Check unit ribbon connection before replacement.
5. Reconnect all leads removed from components during testing.
6. Re-install the outercase (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
The following symptoms indicate a defective key unit. Replace the key unit.
a) When touching the pads, a certain pad produces no signal at all.
b) When touching a number pad, two figures or more are displayed.
c) When touching the pads, sometimes a pad produces no signal.
If the key unit is defective.
1. Disconnect the power supply cord, and then remove outercase cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Replace the key unit.
5. Reconnect all leads removed from components during testing.
6. Re-install the outercase cabinet.
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
2. Control Unit
The following symptoms indicate a defective control unit. Before Replacing the control unit, perform the Key unit test (Procedure K) to determine if control unit is faulty.
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.
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) All the segments of a digit flicker.
2-3 Other possible problems 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.
R-430BK
R-430BW
R-430BD
Y
7
Page 10
R-430BK
R-430BW
R-430BD
TEST PROCEDURES
Procedure Letter
. Touch Control Panel Assembly Test (Confinued)
G
When testing is completed,
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Reconnect all leads removed from components during testing.
5. Re-install the outercase cabinet.
6. Reconnect the power supply cord after installing the outer case cabinet.
7. Run the oven and check all functions.
Component Test
H . Relay Test
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that the leads remain isolated from other components and oven chassis by using insulated
tape.
6. After the above procedure , reconnect the power supply cord.
7. Check voltage between Pin No. 1 of the 2 pin connector (A) and the common terminal of the relay
RYI on the control unit with A.C. voltmeter. The meter should indicate 120volts. If not, check oven
circuit.
RY-1 and RY-2 Relay Test
These relays are operated by D.C. voltage.
Check voltage at the relay coil with a DC. voltmeter during the microwave cooking operation.
DC. voltage indicated
DC. voltage not indicated . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . , .
Defective relay.
Check diode which is connected to the relay
coil. If diode is good, control unit is defective.
I .
1 Relay Symbol
RY 1
RY2
8. Disconnect the power supply cord.
9. Open the door and block it open.
10. Discharge the high voltage capacitor.
11. Reconnect all leads removed from components during testing.
12. Re-install the outer case cabinet.
13.Reconnect the power supply cord after installing the outer case cabinet.
14.Run the oven and check all functions.
1 Operational Voltage
Approx. 24.3 V DC
Approx. 23.5 V DC
1 Connected Components
Oven lamp/Turntable motor/Cooling fan motor
Power transformer
Foil pattern on the printed wiring board Test
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary
on the PWB, which acts as a fuse.
1 Foil Pattern check and repairs
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Follow the troubleshooting guide given below for repair.
1 Steps 1 Occurrence
1 Only pattern at “a” is broken.
I Pattern at “a” and ‘?I” are broken
2
I
1 Cause or Correction
* Insert jumper wire Jl and solder.
I * Insert the coil RCILF~OO~YAZZ between “c” and “d”. 1
8
Page 11
TEST PROCEDURES
R-430BK
EEY
.’ Procedure Letter
1.
Continued
Procedures to be taken when the foil pattern of the printed wiring board (PWB)
is open
5. Make a visual inspection of the varistor burn
damage and test the transformer with an ohmmeter for the presence of layer short-circuit
(check the primary coil resistance which is
approximately 210 Q * 15%). If any abnormal
condition is detected, replace the defective
part(s) m
6. Reconnect all leads removed from components during testing.
7. Re-install the outercase (cabinet).
8. Reconnect the power supply cord after installing the outer case cabinet.
9. Run the oven and check all functions.
2. Follow the troubleshooting guide given below. If indicator does not light up after above check and
repairs are finished.
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that the leads remain isolated from other components and oven chassis by using insulated tape.
6. After the above procedure, reconnect the power supply cord.
7. Follow the troubleshooting guide given below for repair.
Component Test
m
0
1 Steps ( Occurrence
1
The rated AC voltage is not present between
Pin No.1 of the 2-pin connector (A) and the
I I
I I
8. Disconnect the power supply cord, and then remove the outer case.
9. Open the door and block it open,
IO. Discharge the high voltage capacitor.
11. Reconnect all leads removed from components during testing.
12. Re-install the outer case cabinet.
13.Reconnect the power supply cord after the outer case cabinet is installed.
14.Run the oven and check all functions.
common terminal of the relay RYI .
2
The rated AC voltage is present at primary Low voltage transformer or secondary circuit
side of low voltage transformer. defective. Check and repair.
Check supply voltage and oven power cord
9
Page 12
R-430BK
R-430BW
R-430BD
TEST PROCEDURES
Procedure Letter Component Test
J Compu Defrost Test
1. Place one cup of water in the center of the turntable tray in the oven cavity.
2. Close the door, touch the “COMPU DEFROST” pad once and touch the number pad “I”, and touch
the number pad “5”. Then touch the “START” pad.
3. The oven is in “COMPU DEFROST’ cooking mode.
4. The oven will operate as follows:
Weight
0.5 70% 47 sec. 0% 52 sec. 50% 32 sec. 30%
5. If improper operation is indicated, the control unit is probably defective and should be checked.
K . Key Unit Test
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon is
making good contact and verify that the door sensing switch operates properly (contacts are
closed when the door is closed and open when the door is open). If the door sensing switch is good,
disconnect the flat ribbon cable that connects the key unit to the control unit and make sure the
door sensing switch is closed (either close the door or short the door sensing switch connector).
Use the key unit matrix indicated on the control panel schematic and place a jumper wire between
the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control unit
responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does
not respond, it is faulty and must be replaced.If a specific pad does not respond, the above method
may be used (after clearing the control unit) to determine if the control unit or pad is at fault.
5. Reconnect all leads removed from components during testing.
6. Re-install the outer case cabinet.
7. Reconnect the power supply cord after installing the outer case cabinet
8. Run the oven and check all functions.
1st Stage 2nd Stage
Level
Time Level Time Level Time Level
3rd Stage
4th Stage
Time
40 sec.
G8 G7
5
8
0
0 9 8
Z
Minute Compu
Plus
Z
Start Frozen Beverage
cv
Touch
6
KEY UNIT
4 3
Defrost
Clock
G6 G5 G4 G3 G2
Fish/
seafood
snacks center
10
2
7
1
6
Frozen
vegetables
Rice
Reheat
Baked
potato
Poultry
Compu
Cook
Popcorn
Fresh
vegetables
Ground
meat
Frozen
main dish
Gl
Custom
Help
KITCHEN
TIMER
POWER
LEVEL
stop
Clear
Page 13
Procedure Letter Component Test
L . AH Sensor Test
Checking the initial sensor cooking condition
1. The oven should be plugged in at least five minutes before sensor cooking.
2. Room temperature should not exceed 95” F (35” C).
3. The unit should not be installed in any areas where heat and steam are generated. The unit should
not be installed, for example, next to a conventional surface unit.
4. Exhaust vents are provided on the bottom 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 be some 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 off by the spray and turn off before the food is properly cooked.
8. If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.
Water load cooking test
Note: The cabinet should be installed and screws tightened. _
Make sure the oven has been plugged in at lease five minutes before checking sensor cook opera-
tion.
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 Reheat pad once and touch the Start pad, Now, the oven is in the sensor cooking operation
and “REHEAT“ “SENSOR“ “COOK“ will appear in the display.
5. Now the oven will operate for the first 16 seconds without generating microwave energy.
Note: ERROR will appear if the door is opened or Stop/Clear pad is touched during first stage of sen-
sor cooking.
6. After approximately 16 seconds, microwave energy is produced, the oven should turn off when
water is boiling (bubbling).
If the oven does not turn off, replace the AH sensor or check the control unit.
Testing Method for AH Sensor and/or Control Unit
To determine if the sensor is defective, the simplest method is to replace it with a new sensor.
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Remove the AH sensor.
5. Install the new AH sensor.
6 Reconnect all leads removed from components during testing.
7. Re-install the outer case.
8. Reconnect the power supply cord and check the sensor cook operation, proceed as follows:
A. Fill approximately 200 milliliters (7.2 oz.) of tap water in a 1000 milliliter measuring cup.
B. Place the container on the center of tray in the oven cavity.
C. Close the door.
D. Touch Reheat pad once and touch the Start pad.
E. The control panel is in automatic Sensor operation.
F, The oven will turn off automatically when the water is boiling (bubbling).
If the new sensor does not operate properly, the problem is with the control unit.
Checking the Control Unit
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Disconnect the sensor connector that is mounted to control panel.
5. Then connect the dummy resistor circuit (see fig. A) to the sensor connector of control panel.
R-430BK
EEY
1
11
Page 14
R-430BK
R-430BW
R-430BD
Procedure Letter
L.
Checking the Control Unit (Confinued)
6. Disconnect the wire leads to the primary of power transformer.
7. Ensure that these leads remain isolated from other components and oven chassis by using insulated tape.
8. After that procedure, reconnect the power supply cord.
9. Check the sensor cook operation proceed as follows:
lO.Disconnect the power supply cord, and then remove outer case cabinet.
11. Open the door and block it open.
12. Discharge the high voltage capacitor.
13.Disconnect the dummy resistor circuit from the sensor connector of control panel.
14Carry out the necessary repair.
15Reconnect all leads removed from components during testing and repairing.
16.Re-install the outer case cabinet.
17.Reconnect the power supply cord after the outer case is installed.
tions.
18.Carry out the “Water load cooking test” again and ensure that the oven works properly.
Component Test
A. Touch REHEAT pad once and touch Start pad.
B. The control panel is in the sensor cooking operation.
C. After approximately 20 seconds, push plunger of select switch for more than 3 seconds. This
condition is the same as judgment by AH sensor.
D. After approximately 3 seconds, the display shows “XX. XX’ which is the remaining cooking
time, and the display counts down,
If the above is not the case, the control unit is probably defective.
If the above checks positive, the AH sensor is probably defective.
Run the oven and check all func-
F-l +
F-2 +
F-3 +
TO CONNECTOR (F)
ON CONTROL UNIT
CONNECTOR
PLUNGER
1
2
3
Ri
R2
RI, R2:
22&J + 1% ll2W
R3: 4.3ka + 5% 1/4W
R4: 1 MQ + 5% 1/4W
J
~--k-l
Figure A. Sensor Dummy Resistor Circuit
COM
NC
NO
12
Page 15
OUTLINE OF TOUCH CONTROL PANEL
R-430BK
E%dl
The touch control section consists of the following units
as shown in the touch control panel circuit:
(1) Key Unit
(2) Control Unit (The Control Unit consist of Power Unit
and LSI Unit)
The principal functions of these units and their related
signals are explained below.
Key Unit
The key unit is composed of a matrix. Signals generated
in the LSI are sent to the key unit through P20 - P27.
When a key pad is touched, a signal is completed
through the key unit and passed back to the LSI through
AN8, AN9, AN1 0 and AN1 1 to perform the function that
was requested.
Control Unit
The Control unit consists of the following:
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.
ACL Circuit
A circuit to generate a signal which resets the LSI to
the initial state when power is applied.
Buzzer Circuit
The buzzer is responsive to signals from the LSI to
emit Audible sounds (key touch sound and completion sound).
4.
Door Sensing Switch
A switch to “tell” the LSI if the door is open or closed.
Relay Circuit
5.
To drive the magnetron, fan motor, turntable motor
and oven lamp.
6.
Indicator Circuit
This circuit consists of 45 segmenets and 5 com-
mon electrodes using a liquid Crystal Display.
7.
Back Light Circuit
A circuit to drive the back light (Light emmitting
diodes LDI -LDlO).
It incorporates a very small error because it works
on commercial frequency.
Power Source Circuit
8.
This circuit generates voltage necessary in the control unit from the AC line voltage.
In addition, the synchronizing signal is available in
order to compose a basic standard time in the clock
circuit.
Symbol Voltage Application
vc - 5v LSI (ICI),
9. Absolute Humidity Sensor Circuit
This circuit detects the humidity of the food which is
being cooked, to control automatic cooking.
13
Page 16
R-430BK
R-430BW
R-430BD
The I/O signals of the LSI (IZA866DR) is detailed in the following table.
( Pin No. 1 Signal 1 I/O 1 Description
/
1
2
3
4
5
6
7
8
9
10
,
11
12
13
14
15
16
17
18
19
20
21
AN8 IN
Signal coming from touch-key.
When either G-12 line on key matrix is touched, a corresponding signal out of P20-P27 will be
input into AN8. When no key is touched, the signal is held at “H” level.
IN
AN9
Signal similar to AN8.
When either Gil line on key matrix is touched, a corresponding signal will be inputted into AN9.
AN10 IN
Signal similar to AN8.
When either GIO line on key matrix is touched, a corresponding signal will be inputted into
ANIO.
AN11 IN Signal similar to AN8.
When either G9 line on key matrix is touched, a corresponding signal will be inputted into AN1 1.
AVSS IN
I
TEST
x2
x2
vss
OUT
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to VC.
IN
Connected to VC.
Terminal not used.
IN Connected to GND.
IN
Power source voltage: - 5V.
VC voltage of power source voltage to drive the LSI is input to VSS terminal. Connected to VC.
OSCI IN Internal clock oscillation frequency setting input.
The internal clock frequency is set by applying the ceramic filter oscillatior circuit with respect
to OSCI terminal.
osc2 OUT Internal clock oscillation frequency control output.
Output to control oscillation input of 0SC2.
RESET IN Auto-clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set to
‘I” level the moment power is supplied, at this time the LSI is reset. Thereafter set at “H” level.
MD0 IN
Connected to GND.
P20 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is inputted to AN8 - AN11 terminal while
one of G8 line keys on key matrix is touched.
P21 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is inputted to AN8 - AN11 terminal while
one of G7 line keys on key matrix is touched.
P22
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is inputted to AN8 - AN11 terminal while
one of G6 line keys on key matrix is touched.
P23 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is inputted to AN8 - AN11 terminal while
one of G5 line keys on key matrix is touched.
P24
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is inputted to AN8 - AN11 terminal while
one of G4 line keys on key matrix is touched.
P25 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is inputted to AN8 - AN11 terminal while
one of G3 line keys on key matrix is touched.
P26 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is inputted to AN8 - AN11 terminal while
one of G2 line keys on key matrix is touched.
P27 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is inputted to AN8 - AN11 terminal while
one of Gl line keys on key matrix is touched.
J
14
Page 17
R-430BK
R-430BW
R-430BD
Signal I/O
22
P30
23 P31 OUT
OUT Signal to sound Buzzer (2.0 kHz).
Description Pin No.
0.1 sec.
Terminal not used.
24 P32 OUT Common data signal: COM5.
Connected to LCD signal COM5 (Pin No. 37).
25-29
P33-P37
OUT
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.)
P33 (25) ............
P34 (26) ............
P35 (27) ............ SEG34 (40)
P36 (28)
............
P37 (29) ............
SEG 1 (39) ............ SEGI (1)
SEG 2 (40)
............ SEG2 (2)
SEG 3 (41) ............
SEG 4 (42) ............ SEG4 (4)
SEG 5 (43)
............ SEGS (5)
SEG 6 (44) ............ SEG6 (6)
SEG 7 (45)
SEG 8 (46)
............ SEG7 (7)
............ SEG8 (8)
SEG 9 (47) ............ SEG9 (9)
SEG 10 (48)
......... SEGIO (10)
SEG 11 (49) ......... SEGII (11)
SEG 12 (50)
......... SEG12 (12)
SEG 13 (51) ......... SEG13 (13)
SEG 14 (52)
......... SEG14 (14)
SEG 15 (53) ......... SEG15 (15 & 32)
SEG 16 (54) .........
SEG 17 (55) ......... SEG17 (17)
SEG 18 (56) ......... SEG18 (18)
LCD (Pin No.)
SEG32 (38)
SEG33 (39)
SEG35 (41)
SEG36 (42)
SEG3 (3)
SEGIG (16)
B: completion sound
LSI signal (Pin No.) LCD (Pin No.)
SEG 19 (57) ......... SEGIS (19)
SEG 20 (58) ......... SEG20 (20)
SEG 21 (59) ......... SEG21 (21)
SEG 22 (60) ......... SEG22 (22)
SEG 23 (61) ......... SEG23 (23)
SEG 24 (62) ......... SEG24 (24)
SEG 25 (63) ......... SEG25 (25)
SEG 26 (64) ......... SEG26 (26)
SEG 27 (65) ......... SEG27 (27)
SEG 28 (66) ......... SEG28 (28)
SEG 29 (67) ......... SEG29 (29)
SEG 30 (68) ......... SEG30 (30)
SEG 31 (69) ......... SEG31 (31)
SEG 32 (70) ......... SEG37 (43)
SEG 33 (71) ......... SEG38 (44)
SEG 34 (72) ......... SEG39 (45)
SEG 35 (73) ......... SEG40 (46)
SEG 36 (74) ......... SEG41 (47)
SEG 37 (75) ......... SEG42 (48)
SEG 38 (76) ......... SEG43 (49)
SEG 39 (77) ......... SEG44 (50)
SEG 40 (78) ......... SEG45 (51)
30 vss
IN Power source voltage: - 5V.
31-32 VL3-VL2 IN
33 VL3
34 vcc
IN
IN
35 COM4 OUT
36 COM3 OUT
37 COM2
OUT
38 COMI OUT
39-69
70-78
SEGl -SEG31
SEG32-SEG40
79 vcc
OUT
OUT
\
IN
VC voltage of power source voltage to drive the LSI is input to VSS terminal. Connected to VC.
Power source voltage input terminal
Standard voltage for LCD.
Power source voltage input terminal
Standard voltage for LCD. Connected to GND.
Power source voltage GND (OV)
The power source voltage to drive the LSI is input to VCC terminal.
Common data signal: COMI.
Connected to LCD signal COMI (Pin No. 33).
Common data signal: COM2.
Connected to LCD signal COM2 (Pin No. 34).
Common data signal: COM3.
Connected to LCD signal COM3 (Pin No. 35).
Common data signal: COM4.
Connected to LCD signal COM4 (Pin No. 36).
Segment data signal
Signal Similar to P33.
Segment data signal
Signal Similar to P33.
Power source voltage GND (OV)
The power source voltage to drive the LSI is input to VCC terminal.
15
Page 18
R-430BK
R-430BW
R-430BD
Pin No. Signal
80-84 PIO-PI4
85-86 P15-PI6
87
88-89 P40-P41
90 P42
PI7
I/O
Description
OUT Used for Initial balancing of the bridge circuit (absolute humidity sensor).
OUT
Terminal not used.
OUT Oven lamp, fan motor and turntable motor driving signal.
To turn on and off shut off relay RYI. The square waveform voltage is delivered to the RY-1
driving circuit and RY-2 control circuit.
16.7 msec.
” 1 ~ ‘I-_----I n ‘I R--L---H
OUT
OUT
I
I
‘(
During Cooking
Terminal not used.
Magnetron high-voltage circuit driving signal.
I
I
Y
To turn on and off cook relay RY2. In high operation, the signals holds “H” level during microwave cooking and ‘I” level while not cooking. In other cooking modes (variable cooking) the
signal turns to “H” level and “L” level in repetition according to the power level.
- - -- ------- - --------
P-HI
PF_ 24 sec. +rc i’
H: GND
91 IRQO IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
16.7 msec.
92 AVCC
IN
A/D converter power source voltage.
I
I
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
93 AN0
IN
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 LSI.
94
AN1
IN
AH Sensor input.
This is an analog input terminal from the AH sensor circuit and is connected to the A/D converter
built in to the LSI.
95
AN2
To Input signal which communicates the door open/close information to the LSI,
IN
Door closed; “H” level signal (OV).
Door opened ‘I_” level signal (-5V).
96 AN3
OUT
Terminal not used.
97-100 AN&AN7 IN Terminal to change functions according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model in
operation is applied to set up its cooking constant.
H: +5V
L: GND
d
I
16
Page 19
Precautions for Handling Electronic Components
This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed:
CMOS LSI have extremely high impedance at its input
and output terminals. For this reason, it is easily influenced by surrounding high voltage power sources,
static electricity charge in clothes, etc. and sometimes
it is not fully protected by the built-in protection circuit.
In order to protect CMOS LSI, practice the following
guidelines:
1. When storing and transporting LSI, thoroughly wrap
them in aluminum foil.
Also wrap all PW boards in aluminum foil.
2. When soldering, the technician should use a ground-
ing strap as shown in the figure and use a grounded
soldering iron and work table.
Approx. 1 Ma
/
Shapes of Electronic Components
Transistor
P
CB
E -
Transistor
2SB1238
KRC243M
Servicing of Touch Control Panel
We describe the procedures to permit servicing of the
touch control panel of the microwave oven and the precautions you must take when doing so.
,
. .-
To perform the servicing, power to the touch control panel is available either from the power line of the oven itself
or from an external power source.
Servicing The Touch Control Panel With The Oven Power Supply
The high voltage transformer of the microwave oven
is still live during servicing and presents a hazard.
When checking the performance of the touch control
panel, put the outer cabinet on the oven to avoid touching the high voltage transformer or unplug the primary
terminal (connector) of the high voltage transformer to
turn it off; the end of such connector must be insulated
with an insulating tape. After servicing, be sure to reconnect the leads to their original locations.
1. Onso
touch
me models, the power supply co
control panel and the oven itself
#rd be tween the
is so
short that
the two can’t be separated. For those models, check
and repair all the controls (sensor-related ones included) of the touch control panel while keeping it
connected to the oven.
2. On some models, the power supply cord between the
touch control panel and the oven proper is long
enough that they may be separated from each other.
For those models, therefore, it is possible 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
the oven door being closed.
As for the sensor-related controls of the touch control
panel, checking them is possible if dummy resistor(s)
with resistance equal to that of the controls are used.
Servicing The Touch Control Panel With An External Power Supply
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 activates an operational state that is equivalent to the oven
door being closed. Connect an external power source
to the power input terminal of the touch control panel,
then it is possible to check and repair the controls of the
touch control panel; it is also possible to check the sen-
sor-related controls of the touch control panel by using
the dummy resistor (s).
Servicing Tools
Tools required to service the touch control panel assem-
bly.
1. Soldering iron: 30W
(It is recommended to use a soldering iron with a
grounding terminal.)
2. Oscilloscope: Single beam,
DC-IOMHz type or more advanced model.
3. Hand tools.
frequency range:
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 connector of the key unit to the control
unit being sure that the lead wires are not twisted.
After aluminum foil is removed, be careful that abnor-
3.
mal voltage due to static electricity etc. is not applied
to the input or output terminals.
Attach connectors, electrolytic capacitors, etc. to
4.
PWB, making sure that all connections are tight.
Be sure to use specified components where high pre-
5
cision is required.
17
Page 20
R-430BK
R-430BW
R-430BD
COMPONENT REPLACEMENT/ADJUSTMENT PROCEDURE
icrowave ovens contain circuitry capable of producing very high voltage and current, contact with the following
arts may result in severe, possibly fatal, electric shock.
(ample
gh Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness
c..
Avoid possible exposure to microwave energy. Please follow the
instructions below before operating the oven.
Disconnect the power supply cord.
Visually check the door and cavity face plate for
damage (dents, cracks, signs of arcing etc.).
arty out any remedial work that is necessary before
operating the oven.
o not operate the oven if any of the following condiIns exist;
Door does not close firmly.
Door hinge, support or latch hook is damaged.
The door gasket or seal is damaged.
The door is bent or warped.
5. There are defective parts in the door interlock systern.
6. There are defective parts in the microwave generating and transmission assembly.
7. There is visible damage to the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case cabinet is not fitted.
3 prevent electric shock, take the following pre3utions.
Before wiring.
;) Disconnect the power supply cord.
2) Open the door and block it open.
3) Discharge the high voltage capacitor and wait for
60 seconds.
!. Don’t let the wire leads touch the following parts;
1) High voltage parts:
Magnetron, High voltage Transformer, High voltage capacitor and High voltage rectifier assembly.
2) Hot parts:
Oven lamp, Magnetron, High voltage Transform-
er and oven cavity.
3) Sharp edge:
Bottom plate, oven cavity, waveguide, flange,
chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Switch , Switch lever, and
Open button.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector until its pin is
locked and make sure that the wire leads do not
come off even if the wire leads are pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Wiring Diagram.
18
Page 21
ABSOLUTE HUMIDITY SENSOR CIRCUIT
Structure of Absolute Humidity Sensor
The absolute humidity sensor includes two thermistors
as shown in the illustration. One thermistor is housed in
the closed vessel filled with dry air while another is in an
open vessel. Each sensor is provided with a protective
cover made of metal to protect it from the external airflow. The open vessel cover has two small holes in it to
allow moisture laden air from the oven cavity to surround
it.
Sensing part
ventilation openings for sensing
(Open vessel)
Operational Principle of AH Sensor
The figure below shows the basic structure of an abso-
lute humidity sensor. A bridge circuit is formed by two
thermistors and two resistors (RI and R2).
The output of the bridge circuit is amplified by an opera-
’ tional amplifier.
Each thermistor is supplied with a current to keep it
heated to about 150” C (302” F) and the resultant heat
is dissipated in the air, if the two thermistors are placed
in different humidity conditions they show different hu-
midity conditions and different degrees of heat conductivity leading to a potential 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 is
amplified by the operational amplifier.
Operational +
\
Thermistors
Absolute humidity vs.
output voltage characteristic
Sensing part
(Closed vessel)
R-430BK
E%F
the 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 available at its AN1 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 RI 07-RI 11 of IC2.
Changing the resistance values results in that there is
the same potential at both the F-3 terminal of the absolute humidity sensor and the AN0 terminal of the LSI.
The voltage of AN1 terminal will indicate about -25V.
This initial balancing is set up about 16 seconds after the
unit is put in the Sensor Cooking mode.
As the sensor cooking proceeds, the food is heated to
generate moisture by which the resistance balance of
the bridge circuit is deviated to increase the voltage
available at the AN1 terminal of the LSI. Then the LSI
observes that voltage at AN1 terminal and compares it
with its initial value. When the comparison rate reaches
the preset value (fixed for each menu to be cooked), the
LSI caused the unit to stop sensor cooking; thereafter,
the unit goes into the next operation automatically.
When the LSI starts to detect the initial voltage at AN1
terminal 16 seconds after the unit has been put in the
Sensor Cooking mode, if it is impossible to take a bal-
ance of the bridge circuit due to disconnection of the ab-
solute humidity sensor, ERROR will reappear on the dis-
play and cooking is stopped.
Absolute Humidity Sensor Circuit
--------_____
r
R107 620k Q
R108 300k ’
R1O 150kQ
0 L%vL
I
R11137.4k Q
I ” -
I 81
I
SW1
80
P1O-o-Q
SW2
Pll -o-=-J
SW3
82
P12-o-o-J
SW4
83
P137
SW5
84 P14-o-o-J
R3I - I
[ C: Thermistor ’
open vessel I
closed vessel
Absolute humidity (g/m3) )
Detector Circuit of AH Sensor Circuit
This detector circuit is used to detect the output voltage
of the absolute humidity circuit to allow the LSI to control
19
Va: -15V
Va: -15V
S: Thermistor open vessel
vc: -5v C: Thermistor closed vessel
Page 22
R-430BK
R-430BW
R-430BD
AH SENSOR DUCT REMOVAL
1.
Disconnect the power supply cord.
2.
Open the oven door and block it open.
.
3
Remove screws from the rear of the outercase cabinet. Slide the entire case back about 1 inch (3cm) to
free it from retaining clips on the cavity faceplate.
4.
Discharge the high voltage capacitor.
5.
Lift entire outer case cabinet from unit.
Remove ground screw mounted into the sensor
6.
duct.
Sensor Ground
screw
Sensor Duct
7. Slide the two tabs of the sensor duct to the right.
8. Sensor duct is now free.
.
Discharge the high voltage capacitor before touching
any oven components or wiring.
AH SENSOR REPLACEMENT
Removal
1.
Disconnect power supply cord ,
2.
Open the oven door and block it open.
3.
Remove screws from the rear of the outercase cabinet. Slide the entire case back about 1 inch (3cm) to
free it from retaining clips on the cavity faceplate.
4.
Lift the entire outercase cabinet from the oven unit.
5.
Discharge high voltage capacitor.
6.
Remove two (2) screws holding the AH sensor
Refer to Figures l-l 6 & 2-l 6.
7.
Disconnect the AH sensor harness from connector
CN-F on control unit.
8.
AH sensor is now free.
Installation
1.
Insert new AH sensor into AH sensor duct.
Refer to Figures 1-16 & 2-16 for proper sensor
orientation.
2.
Install two (2) screws to secure AH sensor.
3.
Route the AH sensor harness above emboss on AH
sensor duct.
Refer to Figures l-l 6 & 2-16.
4.
Continue to route AH sensor harness across the
oven cavity top plate and through the large opening.
Refer to Figure 2-16.
5
.
Connect AH sensor harness to CN-F on the control
unit.
Re-install the outercase cabinet and check for prop-
6.
er operation.
20
Page 23
AH SENSOR ORIENTATION 8t HARNESS ROUTING
AH Sensor
Orientation
Mounting
Screw
R-430BK
R-430BW
R-430BD
AH densor
AH Sensor Duct
Figure l-1 6
Oven Left Side View
AH Sensor
Harness %
C
Figure 2-16
Oven Top View
21
Page 24
R-430BK
R-430BW
R-430BD
MICROWAVE MEASUREMENT PROCEDURE
After adjustment of the door, interlock and monitor
switches are completed individually or collectively, a INTERLOCK SWITCH TEST and MICROWAVE LEAKAGE TEST must be performed to assure compliance
with DHHS (CDRH) Performance Standards for Microwave Ovens.
Interlock Switch Test
Make sure that the door sensing switch, secondary interlock switch and monitor switch are operating properly
by checking with an ohmmeter.
Refer to the “Test Procedure” of the door sensing switch,
secondary interlock switch and monitor switch.
Microwave Leakage Test
Requirements
1. Microwave leakage limit (Power density limit).
The power density of microwave radiation emitted by
a microwave oven shall not exceed 1 mW/cm* at any
point 5cm or more from the external surface of the
oven, measured prior to acquisition by the purchaser,
and thereafter (through the useful life of the oven)
5mW/cm* at any point 5cm or more from the external
surface of the oven.
2. Safety interlock switches.
Primary interlock relay and door sensing switch will
prevent microwave radiation emissions in excess of
the requirement as above mentioned, secondary
interlock switch shall prevent microwave radiation
emission in excess of 5 mW/cm* at any point 5cm
or more from the external surface of the oven.
Preparation For Testing
Before beginning the actual measurement of leakage,
proceed as follows:
I. Make sure that the actual instrument is operating nor-
mally as specified in its instruction booklet.
2. Place the oven tray in the oven cavity.
3. Place the load of 275 & 15ml(9.8 oz.) of tap water ini-
tially at 20 + 5’C (68OF) in the center of the oven cav-
ity.
The water container shall be a low form of 600 ml (20
oz.) beaker with an inside diameter of approximately
8.5 cm (3 % in.) and made of an electrically nonconductive 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.
4. Set the cooking control on High.
5. Close the door and put the oven into a cook cycle for
several minutes. If the water begins to boil before the
survey is completed, replace it with 275ml of cool water.
Leakage Test
Closed-door leakage test (microwave
1. Grasp the probe of the survey instrument and hold it
perpendicular to the gap between the door and the
body of the oven.
2. Move the probe slowly, not faster than lin./sec
(2.5cm/sec.) along the gap, watching for the maximum indication of the meter.
3 Check for leakage at the door screen, sheet metal
seams and other accessible positions where the continuity of the metal has been breached (eg., around
switches, indicator and vents).
While testing for leakage around the door pull the
door away from the front of the oven as far as is per-
mitted by the closed latch assembly.
4. Measure carefully at the point of the highest leakage
and make sure that the highest leakage is no greater
than 4 mW/cm* to allow for measurement uncertainty,
and that the secondary interlock switch does turn the
oven OFF before any door movement.
measurement).
‘Note: Survey instruments that comply with the require-
ment for instrumentation 21 CFRI 030.1 O(c)(3)(i),
as prescribed by the performance standard for
microwave ovens must be used for testing.
Note: After servicing, record data on service invoice
and microwave leakage report.
22
Page 25
D
/ /
l
H.V.
CAPACITOR
m
TEMP.
0
u
MAGNETRON
RED
---
0
I
RED
N.O.
B1
I
NC.
DOOR
SENSING
I I I’
/f/
MONITOR ’ ’ ’
d
SWITCH
SWITCH
GRN
WHT
Note 2
m D
0
u
\-‘- - - -I 1 PRItiiki $--+L+: (
In
-
m
I
. .
Schematic Diagram
n
0
I
I n?_l- ha n__- -If*! - __
MONITOR
uoor uosea, LOOK u-r Lonamon
BLK
I
FUSE
%+_2+- _ _ ,
ORG
_f
Ry_1 1 c - - 7
n
1
I
I--
I I J7-m
-
- l f
INTERLOCK
SECONDARY
SWITCH
Note 6
ORG
r
WHT
c)
WHT
FUSE
TEMP.
CAVITY
RED
5. The hot (red) wire must be connected to the (finish lead) terminal of the power transformer.
6. Terminal with blue mark on lamp socket must be connected to the (orange) wire.
I
GRYNVHT
1. Circuits subject to change without notice.
NOTES:
2. Wire color code applies to primary circuits only, not to low-voltage or secondary circuits.
3. Power supply cord terminal marked “N” must be connected to the neutral (Gray & white) wire. 0 4. Power supply cord grounding screw must be kept tight at all times.
J,
Page 26
R-430BK
R-430BW
R-430BD
- - - - - -0
I
CE I
’ 92
, 00’
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
A
24
Page 27
1
2
3
4
5
6
AC1 2OV
60Hz
TURNTABLE
MOTOR
OVEN LAMP
FAN
MOTOR
MICRO
I ,
~
Dl-D4
lIESI
4
._d
. .
b
-I
5'
-I
C
--
_o
7
1 3
I
I
I
I
I
1 T'
0
6
RYI
iA+ e
LN.9
--
[COW
b
w
R4 27
4
w 1:
:I
D5
I
I
I 0
b/ 1
D6
e-w-_
s-_-
2SB1238
Q2
-
R5 4.7k
1
I
I I
J m’ c5
101
”
SPI
R6 3.3k
_ lOpI35v
*
I
1 Q3 KRC243M
+&7]
D8
ICI01
= [c5
[CSj
lC8l
LED
VA
GND
VC
INT
VR
BUZZER
TURNTABLE
MOTOR
OVEN LAMP
FAN
MOTOR
I
I
MICRO
N.C.
Cl1 N.C.
cz1
DOOR
SWITCH
DOOR
SWITCH
NOTE
1
2
- : IF NOT SPECIFIED, 1/4w I!I 5%
__)t_ : IF NOT SPECIFIED, lSS270A
Power Unit Circuit
3 4
25
5 6
Page 28
Page 29
R-430BK
R-430BW
R-430BD
1
A
B
2 3 4 5 6
C
D
E
F
G
H
~
1 2 3 4 5 6
Printed Wiring Board of Power Unit
27
Page 30
R-430BK
R-430BW
R-430BD
Contact your nearest SHARP Parts Distributor to order.
For location of SHARP Parts Distributor, Please call Toll-Free;
I-800-BE-SHARP
Ref No. Part No. Q
*
*A
l- 1
*
l- 2
l- 3
l- 4
l- 5
l- 6
l- 7
l- 8
l- 9
l-10
l-11
*
1-12
1-13
*
1-14
1-15
1-16
1-17
RC-QZB018MREO
FH-DZBOO8MRYO
QSOCLBOO6MREO
RLMPTAO68WREO
RMOTEA346WREO
QFSHDBOO3MREO
FFS-BAOlG/KIT
QSW-MAllOWREO
QFS-TBOO6MREO
RV-MZA255WREO
RMOTDAl82/KIT
RTRN-BO6OMREO
FACCDBOO3MREO
QW-QZBO16MREO
FW-VZB147MREO
FW-VZBl25MREO
FDTCTAl77WRKO
r
2- 1 LBNDKBOO7MRPO
2- 2 LANGTBO28MRPO
A
2- 3
2- 4 GDAI-BO5OMRPO
2- 5 GLEGPBOO3MRFO
2- 6 MLEVPBO16MRFO
2- 7
2- 8 NFANPBOOlMREO
2- 9 PDUC-BO43MRFO
2-10
A
2-11 PCOVPBO37MRPO
2-12 GCABUBO82MRPO
2-13 -FROLPBO24MR+K&
2-14
2-15 PPACGBO14MRFO
2-16
2-17 PDUC-BO74MRPO M
2-18 PCUSUBO42MRPO
2-19
PHOK-BOl3MRFO M
PDUC-BO73MRPO M
-------------------
GCABUBO58MRPOA
GCABUBO81MRPOA
&NT-Ab95WREO
PCUSGBO33MRPO M
PCUSGBO28MRPO
Description
Electrical
M
H.V. Capacitor
M
H.V. Diode assembly
M
Oven lamp socket
M
Oven lamp
M
Fan motor
M
Fuse block
M
Monitor switch (V-16G-2C25) & Fuse assembly
(2OA--25OVAC)
M
Sec. interlock & Door sensing switch (V-16G-3C25)
M
Temperature fuse (144'C)
M
Magnetron
M
T.T. Motor
M
Power transformer
M
Power cord
M
H.V. wire A (Transformer - Capacitor)
M
Main wire harness
M
Stop switch harness
M
AH sensor 1'
Oven
M
H.V. Capacitor band
M
Chassis support
Latch hook
M
Base plate
M
Foot
M
Latch lever
Magnetron duct
M
Fan blade
M
Fan duct
-
Oven cavity (Not a replaceable Dart)
M
Waveguide cover
M
Outer case cabinet
M
Outer case cabinet
M
Outer case cabinet
M
T.T. Roller assembly
M
T.T. Tray
M
T.T. Motor packing
Base plate cushion
AH sensor duct
M
Air flow cushion
M
cavity cushion
(R-430BK)
(R-430BW)
(R-430BD)
Qty Code
_
*
1
1
1
1
1
1
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
AQ
AE
AE
AR
AD
AF
AE
AF
BE
AP
BF
AC
AU
AF
AQ
AB
AF
AG
AQ
AD
AF
AC
AD
AD
AV
AV
AV
AK
AF
28
Page 31
R-430BK
R-430BW
R-430BD
Ref No.
Part No. Q
Description Qty Code
Control Panel
3-l / CPWBFBOllMRUO- M Control unit' 1 BK
3-1A QCNCMA446DREO J &pin connector (CN-A) 1 AD
3-1B QCNCMA275DREO J 2-pin connector (CN-B) 1 AB
3-1c FW-VZB146MREO M Lead wire harness
21
RC-KZAO87DREO J Capacitor O.lkF 50V
(WH-1)
22 VCEAB31EW108M J Capacitor 1000pF 35V 1
C3 RC-KZA087DREO J Capacitor
c4-5 VCEAB31VW106M J Capacitor
Dl-4
VHDllESl///-1 J Diode (11ESl)
O.lpF 50V
10pF 35V
D5-8 VHDlSS270A/-1 J Diode (lSS270A) 4
Ql-Q2
Q3
Rl VRD-B12EF242J J Resistor
VS2SB1238//-3 J Transistor (2SBl238)
VSKRC243M//-3 J Transistor (KRC243M) 1
2.4k@/4W
R2 VRD-B12HF681J J Resistor 68O@/sW
R3 VRD-B12HF511J J Resistor 510@/2w
R4 VRD-B12EF270J J Resistor 27@/,w
R5 VRD-B12EF472J J Resistor 4.7ka '/,w
R6 VRD-B12EF332J J Resistor 3.3ka l/,w
RY2-1
SPl
Tl
VRSl RH-VZAO32DREO J Varistor (104G471K)
RRLY-BOO2MREO M Relay (DU24Dl-lP(M))
RALM-AO14DREO J Buzzer (PKM22EPT)
- RTRNPBOOgMREO M Transformer
,
ZDl VHEHZ161///-1 J Zener diode (HZ16-1)
3-2 LHLD-BOO6MRFO M LCD holder
3-3 FPNLCB206MRKO M Control panel assembly (R-430BK)
FPNLCB207MRKO M Control panel assembly (R-430BW)
FPNLCB208MRKO M Control panel assembly (R-430BD)
3-4 FUNTKBl54MREO M Key unit (R-430BK)
FUNTKBl55MREO M Key unit (R-430BW)
FUNTKB156MREO M Key unit (R-430BD)
3-5 JBTN-BO7OMRFO M Open Button (R-430BK)
3-5 JBTN-BO7lMRFO M Open Button (R-430BW)
3-5 JBTN-BO72MRFO M Open Button (R-43OBD)
3-6 MSPRTAO5OWREO M Button Spring
3-7 PSHEPA626WREO M LED sheet
3-8 XEPSD3OPlOXSO M Screw; Control unit mtg.
1
AC
1 AB
AD
1 AB
2 AB
4 AB
2
AB
1
1
1
AB
1
1
1
2 AH
1 AG
1
1 AE
1
1 AC
1
1
1
1 AR
1
1
1
1
AR
AR
AE
AE
1 AE
1
1 AR
1
29
Page 32
R-430BK
R-430BW
R-430BD
Ref No. Part No. Q Description Qty Code
Door
4- 0 CDORFB217MRKO M Door assembly(R-43OBK) 1 BE
4- 0 CDORFB216MRKO M Door assembly (R-430BW) 1 BE
4- 0 CDORFB215MRKO M Door assembly(R-43OBD) 1 BE
4- 1 FCOV-Bll5MRKO M Door screen assembly (R-430BK) 1 AS
4- 1 FCOV-B116MRKO M Door screen assembly (R-43OBW) 1 AS
4- 1 FCOV-B117MRKO M Door screen assembly (R-430BD) 1 AS
4- 2 FDORFBO62MRTO M Door panel 1 AW
A
4- 3 PSHEPBO2lMREO M Sealer film 1 AE
4- 4 GCOVHBO34MRFO M Choke cover 1 AG
A
4- 5 LSTPPBO2lMRFO M Latch head ' 1 AE
4- 6 MSPRTAO46WREO M Latch spring ' 1 AB
4- 7 HPNL-BO77MREO M Door Screen (R-430BK) 1 AK
4- 7 HPNL-BO78MREO M Door Screen (R-430BW/R-430BD) 1 AK
Miscellaneous
5- 1 TCAUABO15MRRO
5- 2
5- 3 TCAUABO33MRRO
5- 4 TLAB-BO33MRRO
5- 5 TINSEB18OMRRO
TCAUABO27MRRO
Monitor caution label
DHHS caution label
UL SCREW label
Menu label
Operation manual
AB
AE
6- 1 LX-BZAO4lWREO
6- 2 LX-CZ0052WREO
6- 3
6- 4 LX-BZ0081YBEO
6- 5 XOTSD40Pl2000
6- 6 XCPSD30P08000
6- 7 XCBSD30P08000
6- 8 XHTSD40P08000
6- 9 LX-CZAO38WREO
6-10 XHTSD4OPO8RVO
6-11 LX-CZBOllMREO
XHTSD4OP12RVO
Fasteners
M
Screw; Base plate mtg.
M
Screw; Latch hook mtg.
M
Screw; Power cord mtg.
M
Screw; H.V. Capacitor mtg.& Magnetron mtg.
M
Screw; Power transformer mtg., Chassis support &
Base plate.
M
Screw; T.T. Motor mtg. & AH sensor mtg.
M
Screw; Temperature fuse mtg.
M
Screw; Magnetron duct mtg.
M
Screw; O.C. Cabinet grnd.
M
Screw; Fan motor mtg.
M
Screw; UL O.C. Cabinet
& AH sensor duct mtg.
1
3
3
1
5
12
30
Page 33
4
r
I
Cavity Assembly
A
z
Q
/
R-430BK
R-430BW
1
I
4
5-3
Q
3
-I
I
I
I
5
1
I
I
6
R-430BD
3
:
0
9
2-a
1-12
Page 34
R-430BK
R-430BW
R-430BD
4
-
3
-
J
-
1 2
Control Panel Assembly
3 4 5
6
1
-
Door Assembly
r----
E
-
’ ‘\
I
F
-
G
-
4-o
Q
--- ---------~-___- ------- _L ------------~--
4-2
4-1
\
‘$
\
(3
1
H
l--_____-__----------~-_----_--_--___----------_-
1 2 3 4 5 6
J
32
Page 35
Wire Harnesses
*
Actual harnesses may be different than illustrations.
4 * TRAY HOLDER
. . .,
_:^
a OPERATlON MANUAL d>
.
.:
* Non-replaceable items.
1
* PACKING CASE
I
2
3
U
4
5
6
33
Page 36
R-430BK
R-430BW
R-430BD
SHARR
‘980 SHARP CORP. (3M2.70E) Printed in U.S.A.
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