SHARP CORPORATION
SERVICE MANU AL
R-3V97
S9632R3V97PX/
In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
MICROWAVE OVEN
MODEL
R-3V97
Page
MICROWAVE MEASUREMENT ............................................................................................... Inside Front Cover
CAUTION, MICROWAVE RADIATION................................................................................................................. 1
WARNING..............................................................................................................................................................1
WIRING DIAGRAM ............................................................................................................................................... 1
PICTORIAL DIAGRAM ......................................................................................................................................... 2
PARTS LIST ......................................................................................................................................................... 3
TABLE OF CONTENTS
This is a supplemental Service Manual for Model R-3V97. This model is quite similar to Base Model R-3V16
(Refer No. is SX433R3V16PX/). Use this supplemental manual together with the Base Model Service Manual for
Completed operation, service information, etc..
R-3V97
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.
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.
Recommended instruments are:
NARDA 8100
NARDA 8200
HOLADAY HI 1500
SIMPSON 380M
2. Place the oven tray into the oven cavity.
3. Place the load of 275 ± 15ml of water initially at 20 ±
5˚C in the centre 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.
4. 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 cool water.
5. Move the probe slowly (not faster that 2.5cm/sec.)
along the gap.
6. The microwave radiation emission should be measured
at any point of 5cm or more from the external surface of
the oven.
mW cm
2
mW cm
2
Microwave leakage measurement at 5 cm distance
SHARP
R-3V97
1
CAUTION
MICROWAVE RADIATION
DO NOT BECOME EXPOSED TO RADIATION FROM THE MICROWAVE GENERATOR OR OTHER PARTS
CONDUCTING MICROWAVE ENERGY.
Service engineers 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.
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 "*" on parts list are used at voltages more than 250V.
Removal of the outer wrap gives access to potentials above 250V.
All the parts marked "∆" on parts list may cause undue microwave exposure, by themselves, or when they are damaged,
loosened or removed.
Figure O-1 Oven Schematic-OFF Condition
NOTE: indicates components with potentials above 250 V.
SCHEMATIC
NOTE: CONDITION OF OVEN
1.DOOR CLOSED
2.CLOCK APPERAS ON DISPLAY
BRN/18
G-Y/18
EARTH
FM
TTM
NC
BLU/18
TM
CAPACITOR
0.94µ
AC 2000V
H.V. RECTIFIER
MAGNETRON
POWER
TRANSFORMER
MONITOR
RESISTOR
0.8/20W
MONITOR
SWITCH
TURNTABLE
MOTOR
FAN MOTOR
TIMER
OVEN LAMP
THERMAL
CUT-OUT
95˚C
1ST.
LATCH
SWITCH
TEMP.
FUSE
150˚C
(MG)
FUSE
M6.3A
2ND.
LATCH
SWITCH
TEMP.
FUSE
150˚C
(OVEN)
OL
220V ~50 Hz
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