DOWNLOAD Sharp R-671M Service Manual ↓ Size: 2.28 MB | Pages: 43 in PDF or view online for FREE

Model
R-671M
Pages
43
Size
2.28 MB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven
File
r-671m.pdf
Date

Sharp R-671M Service Manual ▷ View online

R-671M  -  1
TABLE OF CONTENTS
Page
CAUTION, MICROWAVE RADIATION ....................................................................................................   3
WARNING ................................................................................................................................................. 3
SERVICING .............................................................................................................................................  4
GENERAL INFORMATION ....................................................................................................................... 4
PRODUCT SPECIFICATIONS ................................................................................................................. 5
APPEARANCE VIEW ..............................................................................................................................  6
OPERATION SEQUENCE ........................................................................................................................ 7
FUNCTION OF IMPORTANT COMPONENTS .......................................................................................  9
TROUBLESHOOTING GUIDE ............................................................................................................... 10
TEST PROCEDURE ..............................................................................................................................  11
TOUCH CONTROL  PANEL ASSEMBLY .............................................................................................. 18
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ..................................................  23
MICROWAVE MEASUREMENT ...........................................................................................................   29
WIRING DIAGRAM ................................................................................................................................  30
PICTORIAL DIAGRAM ..........................................................................................................................  33
CONTROL PANEL CIRCUIT .................................................................................................................. 34
PRINTED WIRING BOARD .................................................................................................................... 35
PARTS LIST ..........................................................................................................................................  36
S8805R671M//
MICROWAVE OVEN WITH
TOP AND BOTTOM GRILLS
MODELS
R-671(B)M
R-671(W)M
In interests of user-safety the oven should be restored to
its original condition and only parts identical to those
specified should be used.
 SERVICE MANUAL
SHARP CORPORATION
10min.
AUTO
COOK
AUTO
DEFROST
MICROWAVE
POWER LEVEL
STOP/
CLEAR
TIMER
Kg/Lb AUTO START
CLOCK
START
AUTO MINUTE
Instant Cook
GRILL
LESS
MORE
Kg   Lb g   oz
DUAL
GRILL
1min.
10sec.
PIZZA
BREAKFAST
MIXEED GRILL
OVEN CHIPS
BAKED POTATOES
1 Chilled Ready Meals
2 Frozen Ready meals
3 Roast Beef/Lamb
4 Roast  Pork
5 Roast  Poultry
6 Crispy Crumb Foods
7 Qulche / pie
1 Meat Joint
2 Poultry
3 Chicken  Portions/
Steak / Chops
4 Minced  Meat
5 Bread
STR
AUTO
TOP GRILL
BOTTOM GRILL
KG PCS MICRO
MICRO
COOK
TURN
R-671M  -  2
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.
Removal of the outer wrap gives access to potential above 250V.
All the parts marked "
" on the parts list may cause undue microwave exposure, by themselves, or when they
are damaged, loosened or removed.
Never operate the Grill and/ or Bottom heater with the oven outer cabinet removed. 
(Because air flow is
eliminated, and the excess heat generated on adjacent components). 
It can cause permanent damage or fire.
SHARP CORPORATION
OSAKA, JAPAN
SERVICE MANUAL
MICROWAVE OVEN WITH TOP AND BOTTOM GRILL
  R-671(B)M / R-671(W)M
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, so they will be qualified to render
satisfactory customer service.
WARNING
MICROWAVE RADIATION
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 mirowave 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.
R-671M  -  3
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
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
WARNING: AGAINST THE CHARGE OF THE HIGH-
VOLTAGE CAPACITOR
The high-voltage capacitor remains charged about 60 sec-
onds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the high-
voltage capacitor (that is, of the connecting lead of the high-
voltage rectifier) against the chassis with the use of an
insulated screwdriver.
Sharp recommend that wherever possible fault-finding is
carried out with the supply disconnected. It may in, some
cases, be necessary to connect the supply after the outer
case has been removed, in this event carry out 3D checks and
then disconnect the leads to the primary of the power trans-
former. Ensure that these leads remain isolated from other
components and the oven chassis. (Use insulation tape if
necessary.) When the testing is completed carry out 3D
checks and reconnect the leads to the primary of the power
transformer.
SERVICING
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts will
result in electrocution.
High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage harness.
REMEMBER TO CHECK 4R
1) Reconnect all leads removed from components during
testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run  the oven. Check all functions.
Microwave ovens should not be run 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 that the water is now hot. If the water
remains cold carry out 3D checks and re-examine the
connections 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 a microwave leakage test carried out.
R-671M  -  4
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
230-240V
50 Hertz
Single phase, 3 wire earthed
Power Consumption
Microwave cooking
1.3 kW  Approx. 5.8 A
Top Grill mode
0.75 kW
Approx. 3.1 A
Grill cooking
Bottom Grill mode
0.45 kW
Approx. 1.9 A
Top and Bottom  mode
1.15 kW
Approx. 4.8 A
Dual cooking
Micro and Top Grill
2.0 kW
Approx. 9.5 A
Micro and Bottom Grill
1.7 kW
Approx. 8.3 A
Micro, Top and Bottom Grill
2.4kW
Approx. 10.6 A
Power Output
800 W nominal of RF microwave energy (measured by method of IEC 705)
Operating fequency 2450 MHz
Grill heating element Power Output (Top Grill)
700 W
Bottom heating element Power Output
400 W
Case Dimensions
Width
450 mm
Height
298 mm including foot
Depth
392 mm
Cooking Cavity Dimensions
Width
296 mm
Height
203 mm
Depth
299 mm
Turntable diameter
275 mm
Control Complement
Touch Control System
Clock (1:00 - 12:59 or 0:00 - 23:59) / Timer (0 - 90 minutes)
Microwave Power for Variable Cooking
 Repetition Rate;
100% ................................. Full power throughout the cooking time
70% ..................................................  approx. 70% of FULL Power
50% ..................................................  approx. 50% of FULL Power
30% ..................................................  approx. 30% of FULL Power
10% ..................................................  approx. 10% of FULL Power
LESS ( )/MORE ( ) keys,
STOP/CLEAR key
AUTO COOK key
AUTO DEFROST key
PIZZA key, BREAKFAST key
INSTANT COOK keys
MICROWAVE POWER LEVEL key
DUAL GRILL key, GRILL key
START/AUTO MINUTE key
TIMER key
TIME keys
WEIGHT CONVERSION key
AUTO START/CLOCK key
Kg.Lb g.oz key
Set Weight
Approx. 15 kg
PRODUCT DESCRIPTION
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  • DOWNLOAD Sharp R-671M Service Manual ↓ Size: 2.28 MB | Pages: 43 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp R-671M in PDF for free, which will help you to disassemble, recover, fix and repair Sharp R-671M Microwave Oven. Information contained in Sharp R-671M Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.