Sharp R-2V53 User manual

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SHARP SERVICE MANUAL
MICROWAVE OVEN
MODEL R-2V53
In interests of user-safety the oven should be restored to its original
condition and only manufacturer original spare parts must be used.
This is a supplemental Service Manual for Model R-2V53.
This model is quite simiiar to Base Model R-2V52 (Refer No. is S9003R2V52PJ/).
Use this supplemental manual together with the Base Model Service Manual.
Refer to the Base Model Service Manual for complete operation, service information, etc.
TABLE OF CONTENTS Page
GENERAL IMPORTANT INFORMATION ...................................................................................................... 1
WARNING .......................................................................................................................................................... 1
PRODUCT SPECIFICATIONS ......................................................................................................................... 2
APPEARANCE VIEW ........................................................................................................................................ 3
TEST PROCEDURE ........................................................................................................................................... 4
PICTORIAL DIAGRAM ..................................................................................................................................... 7
PARTS LIST ....................................................................................................................................................... 8
SHARP CORPORATION

R-2V53

R-2V53
SERVICE MANUAL
SHARI=
MICROWAVE OVEN
R-2V53
GENERAL IMPORTANT INFORMATION
This Manual has been prepared to provide Sharp Corp. Service
engineers with Operation and Service Information.
It is recommended that service engineers carefully study the
entire text of this manual and base model manual, so they will
be qualified to render satisfactory customer service.
CAUTION
MICROWAVE RADIATION
Service engineers should not be exposed to the micro-
wave 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.
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 is not any other visible damage with the oven.
Servicing and repair work must be carried out only by
trained service engineers.
All the parts marked “*”
more than 250V. on parts list are used at voltages
SHARP CORPORATION
OSAKA, JAPAN
APPEARANCE VIEW
PICTORIAL DIAGRAM

R-2V53
PRODUCT SPECIFICATIONS
ITEM
Power Requirements
I
/ 240 Volts
50 Hertz
DESCRIPTION
Power Consumption
Power Output
Outside Dimensions
Cooking Cavity Dimensions
Turntable diameter
Control Complement
Single phase, 3 wire earthed
0.96 kW, Approx. 4.2 Amperes
I
600 watts nominal of RF microwave energy (By method of IEC 705 1988)
500 watts nominal of RF microwave energy (2 litre water load)
1 Operating frequency of 2450MHz
I
j Width 450 mm
Height 285 mm including foot
Depth 340 mm
Width 285 mm
, Height 185 mm
Depth 313 mm
272mm
’ 60 min. Dual Speed Timer
Microwave Power Control
Repetition Rate;
HIGH ..................................... Full power throughout the cooking time
MED HIGH (MEDIUM HIGH) ................. approx. 70% of Full Power
MED (MEDIUM) ....................................... approx. 50% of Full Power
MED LOW (MEDIUM LOW DEFROST) approx. 30% of Full Power
LOW ............................................................ approx. 10% of Full Power
Start Button
Set Weight / Approx. 13.0 kg
GENERAL INFORMATION
WARNING
THIS APPLIANCE MUST BE EARTHED
IMPORTANT
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
2

R-2V53
APPEARANCE VIEW
* Place the roller stay on
the coupling in the oven
and seat the turntable on
the roller stay.
CONTROL PANEL
\ VARIABLE COOKING CONTROL
OPEN DOOR
1. Timer (O-60 minutes dual speed timer)
Turn to set cooking time or weight of
defrost food.
2. Meat defrost guide (inner scale)
3. Variable cooking control
There are five power levels
Approximate percentage of microwave
power for each power level.
HIGH 100%
MED HIGH (MEDIUM HIGH) 70%
MED (MEDIUM) 50%
MED LOW/DEFROST
(MEDIUM LOW/DEFROST) 30%
LOW 10%
4. Door open button
5. START button
6. Hole of oven cavity
7. Ventilation openings
8. See through door
9. Safety door latches
10. Hinges
11. Waveguide cover
12. Oven lamp
13. Roller stay
14. Turntable
15. Access cover for oven lamp replacement
16. Power supply cord
3

R-2V53
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
MAGNETRON TEST
NEVER TOUCH ANY PART IN THE CIRCUIT WlTH YOUR HAND OR AN INSULATED !
; TOOL WHILE THE OVEN IS IN OPERATION.
CARRY OUT 3D CHECKS
Isolate the magnetron from the high voltage circuit by removing all leads connected to the filament
terminal.
To test for an open circuit filament use an ohmmeter to make a continuity test between the
magnetron filament terminals, the meter should show a reading of less than 1 ohm.
To test for a short circuit filamen to anode condition, connect ohmmeter between one of the fil-
ament terminals and the case of the magnetron (ground). This test should be indicated an infinite
resistance. If a low or zero resistance reading is obtained then the magnetron should be replaced.
MICROWAVE OUTPUT POWER BY METHOD OF IEC 705 1988
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (with outer case fitted).
Microwave output power from the magnetron can be measured by way of IEC 705, i.e. it can be
measured by using a 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/4.1 87 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/4.187=VxAT
P(W)=4.187xVxAT/t
Our condition for the water load is as follows:
Room temperature ... around 2O”C, Power supply Voltage ... 240 volts.
Water load ... 1000 g, Initial temperature ... 1Of2”C, Heating time .... 70 sec.
P=60xAT
Measuring condition:
I. Container
The water container must be a cylindrical borosilicate glass vessel having a maximum material
thickness of 3 mm and an outside diameter of approximately 190 mm.
2. Temperature of the oven and vessel
The oven and the empty vessel are at ambient temperature prior to the start of the test.
3. Temperature of the water
The initial temperature of the water is (10 f 2)X.
4. Select the initial and final water temperature so that the maximum difference between the final
water temperature and the ambient temperature is 5K.
5. Select stirring devices and measuring instruments in order to minimize addition or removal of
heat.
6. The graduation of the thermometer must be scaled by 0.1 “C at minimum and an accurate
thermometer.
7. The water load must be (1000 f 5) g.
8. “t” is measured while the microwave generator is operating at full power. Magnetron filament
heat-up time is not included.
NOTE: The operation time of the microwave oven is “t + 2” sec. 2 sec. is magnetron filament
heat-up time.

R-2V53
TEST PROCEDURES (CONT’D)
PROCEDURE
LETTER COMPONENT TEST
Measuring method: ~~-
1. Measure the initial temperature of the water before the water is added to the vessel.
Example: The initial temperature Tl = 11 “C
2. Add the 1 litre water to the vessel.
3. Place the load on the centre of the shelf.
4. Operate the microwave oven at HIGH for the temperature of the water rises by a value A T of
(10 f 2) K.
5. Stir the water to equalize temperature throughout the vessel.
6. Measure the final water temperature.
Example: The final temperature T2 = 21 “C
7. Caluculate the microwave power output p in watts from above formula.
Initial temperature
1Temperature after
i (70 + 2) = 72 sec.
jT1 = 11°C
(T2 = 21°C
/Temperature difference Cold-Warm / AT = 10°C
Measured output power P= 60 x 10°C
The equation is as follows: = 600 Watts
i P= 60 x AT I
JUDGMENT: The measured output power should be at least &I5 % of the
rated output power.
CAUTION: 1°C CORRESPONDS TO 60 WATTS.
REPEAT MEASUREMENT IF THE POWER IS INSUFFICIENT.
*
T2”C
Heat up for 72 sec.
Note: IEC is the abbreviation of International Electronical Commission.
MICROWAVE OUTPUT POWER BY METHOD OF 2 LITER WATER LOAD
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (with outer case fitted).
Microwave output power from the magnetron can be measured by way of substitution i.e it can
be measured by using a 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.
5

R -2V53
TEST PROCEDURES (CONT’D)
PROCEDURE
LETTER COMPONENT TEST
’ The formulae is as follows; ,
P x t / 4.2 = V x AT
P (W) = 4.2 x V x AT / t
Our condition for the water load is as follows:
Room temperature ... around 20°C, Power supply Voltage ... 240 volts.
Water load ... 2000 ml, Initial temperature ... 1O&l “C, Heating time ...2 min. 48 sec. !
P=50xAT ,
Measuring method:
A) Use two 1 litre Pyrex beakers with a diameter of approximately of 12cms.
B) Place 1 litre of 10°C water in each beaker.
C) Mark Tl on the one beaker and mark T2 on the other one. And stir the water and measure the
temperature of water the thermometer and note them. The graduation of the thermometer must
be scaled by 0.1 “C at minimum and an accurate mercury thermometer is recommended.
Example: The initial temperature Tl = 1O’C, T2 = 11 “C
D) Place the two beakers as touching each other in the centre of the cavity.
E) Set the timer to 2 minute 48 seconds at 100% power (the time required to raise the water
temperature 10 degrees C.)
F) The time must be measured with stopwatch or wristwatch.
G) After 2 minute and 48 seconds, stop the oven by opening the door.
H) Remove the two beakers from the oven and measure the temperature of the water by stiring the
water with the thermometer and noting the readings.
Example: Tl = 20°C, 12 = 21 “C
Initial temperature Tl=lO”C T2=ll”C
,Temperature after 2 min. 48 sec. Tl = 20°C T2 = 21 “C
Temperature difference Cold-Warm AT1 = 10°C AT2 = 10°C I
, Mean temperature rise AT AT = (AT1 +AT2) / 2 j
I / = (IOOC + IOOC) /2 ;
j = 10°C I
Measured output power P=50xlo”c /
The equation is as follows: I = 500 Watts
P= 50 x AT
NOTE: The measured output power should be at least f15 % of the rated
output power.
CAUTION: 1°C CORRESPONDS TO 50 WATTS.
REPEAT MEASUREMENT IF THE POWER IS INSUFFICIENT.
4
crl OC) (T2 OC) (T2 OC)
Heat up for 2 min. 48 sec.
6

R-2V53
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7

R -2V53
PARTS LIST
Note : The voltage supplied to the parts “*” are greater than 250V.
REF. NO. 1 PART NO. I DESCRIPTION 1Q’TY ICODE
ELECTRICAL PARTS
l- 6
l- 7
i- 8
i- 9
l-10
l-11
l-13
l-14
l-15 -
l-16
1-17
l-18
l-19
l-20
QSWTEA092WREO TM: Timer motor
QFS-TA014WREO TFl: Temp. fuse 150°C (MG)
QSW-MA007WREO SWl:
QSW-MA009WREO SW3: 1st latch & cook switch (V-5230D-069)
QSW-MAOlOWREO SW2: Monitor switch (V-5220D-070)
2nd latch switch (V-5210D-068)
QFS-TA014WREC TF3:
RC-QZAllSWREC Temp. fuse 150°C (OVEN)
FMOTEA208WRKG C: High voltage capacitor
FM: Fan motor with fan blade
QACCAAOllWREO
OFS-C0019WREO Power supply cord F: Fuse M6.3A
QFS-TAOlOWREO
QSOCLAOllWREO
RLMPTA029WREO
RMOTDA086WREO
RR-WZA003WREO
RTRN-A293WREO
RV-MZA122WREO
FW-OZA071WRKO
QFSHDA002WREO
2- 1
2'-- l-l
l-2
2- 2
2- 3
2- 4
2- 5
FFTASA035WRKC
PCUSGA306WRPO Oven lamp access cover assembly
Cushion
PSLDPA005WRPO Lamp reflector
GCABUA306WRPO Outer case cabinet
FDAI-A135WRWO Bottom plate
FHNG-A096WRTO
GLEGPA023WREO Lower oven hinge
Foot
TF2: Temp. fuse 115°C
Oven lamp socket
OL: Oven lamp
TTM: Turntable motor
R: Monitor resistor 0.8R 20W
T: Power transformer
MG: Magnetron
H.V. rectifier assembly
Fuse holder
CABINET PARTS
-i- 1
:
1
1
:
1
1
1'
1
1
1
1
1
1
1
BF
AG
AF
AF
AF
AG
AW
BA
AP
AE
AG
AH
AK
AP
AG
BK
BF
AH
AE
CONTROL PANEL PARTS
1 IAN
1 AA
1 AD
1 BC
1 AV
3- 1 HPNLCA957WRRO Control 3- - panel
-G JBTN-A688WRFO Start button 1 AU
;- 4 JBTN-A689WRFO Door open button 1 AF JKNBKA450WRVO Timer knob 1 AG
3- 5 JKNBKA451WRVO Variable cooking 1
control knob AH
1 AH
3- 6 MSPRPA067WREO Button spring 1 AB
OVEN PARTS
FROLPA046WRKO Roller stay
NTNT-A034WRFO Turntable 1 AX
4- 3 MLEVPA167WRFO Switch lever 1 AM
MSPRTA115WREO Switch lever spring 1 AE
PHOK-A062WRFO Latch hook 1 AC
1
4- 6 AP LBNDKA038WRPO4- 7 Capacitor holder
MHNG-A225WRTO Upper oven hinge 1 AH
4- 8 DOVN-A314WRKO Oven 1 AG
4- 8-2 LBOS-A042WREO cavity assembly
4- 8-3 XBPUW50P08000 Waveguide stub 1 BN
Screw 1 AG
1
4- 8-4 AA XWSUW50-13000 Washer
4- 9 LX-WZA028WREO Washer 1 AA
4-10
4-11 LSTPPA069WRFO Cord anchorage (upper)
4-12 LSTPPA070WRFO Cord anchorage (lower) PCLIC0026WREO P-clip
4-13 PCOVPA208WRFO
4-14 H.V.C.1 PCOVPA241WREO Waveguide cover 1 AF
PCUSGA208WRPO Trans. cushion 1 AL
4-17 PCUSUA190WRPO Cushion 1 AC
PDUC-A395WRFO Air guide 1 AC
1 AG
8