Service Manuals, User Guides, Schematic Diagrams or docs for : Sharp MICROWAVEs R-870B
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R-870B
SERVICE MANUAL
S8837R870BPHR
DOUBLE GRILL
CONVECTION
MICROWAVE OVEN
TURNOVER ADD STAND COVER
STIR DEFROST HELP
%
KG AUTO SENSOR COOK
CRISPY SNACK PIZZA
R-870B
AUTO COOK
GRILL ROAST BAKE
1 1
Grilled Fish 1
Beef Cake
2
MODEL
Grilled Lobster 2 2
Lamb Apple Pie
3 3
Steak Chicken 3
Cookies
SENSOR COOK
RICE MENU REHEAT DISH STEAM MENU
HELP
GRILL CONVEC PREHEAT MIX
DOUBLE GRIL
L SLOW COOK POWER LEVEL EASY DEFROST
CONVECTIO
N
STOP/ CLEAR
INSTANT COOK/START
Sensor
In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
TABLE OF CONTENTS
Page
CAUTION, MICROWAVE RADIATION.................................................................................................... 1
WARNING .................................................................................................................................................1
PRODUCT SPECIFICATIONS ................................................................................................................ 2
GENERAL INFORMATION....................................................................................................................... 2
APPEARANCE VIEW .............................................................................................................................. 3
OPERATION SEQUENCE....................................................................................................................... 4
FUNCTION OF IMPORTANT COMPONENTS ....................................................................................... 8
SERVICING .............................................................................................................................................. 8
TROUBLESHOOTING GUIDE ............................................................................................................... 10
TEST PROCEDURE .............................................................................................................................. 12
TOUCH CONTROL PANEL ASSEMBLY .............................................................................................. 20
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE .................................................. 27
MICROWAVE MEASUREMENT ........................................................................................................... 33
WIRING DIAGRAM ................................................................................................................................ 34
PICTORIAL DIAGRAM .......................................................................................................................... 38
POWER UNIT CIRCUIT ......................................................................................................................... 39
CONTROL PANEL CIRCUIT .................................................................................................................. 40
PRINTED WIRING BOARD .................................................................................................................... 41
PARTS LIST .......................................................................................................................................... 42
SHARP CORPORATION
R-870B
R-870B
SERVICE MANUAL PRODUCT SPECIFICATIONS
GENERAL INFORMATION
DOUBLE GRILL
CONVECTION
MICROWAVE OVEN
APPEARANCE VIEW
R-870B
GENERAL IMPORTANT INFORMATION
OPERATING SEQUENCE
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
FUNCTION OF IMPORTANT
text of this manual, so they will be qualified to render satisfactory
COMPONENTS
customer service.
CAUTION SERVICING AND
MICROWAVE RADIATION TROUBLESHOOTING GUIDE
Service engineers should not be exposed to the microwave
energy which may radiate from the magnetron or other micro-
wave generating devices if it is improperly used or connected. TEST PROCEDURE
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.
TOUCH CONTROL PANEL
WARNING
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
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.
MICROWAVE MEASUREMENT
(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. WIRING DIAGRAM
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.
PARTS LIST
All the parts marked "" on parts list may cause undue microwave
exposure, by themselves, or when they are damaged, loosened or
removed.
Never operate the Top 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 a fire.
SHARP CORPORATION
OSAKA, JAPAN
1
R-870B
PRODUCT DESCRIPTION
SPECIFICATION
ITEM DESCRIPTION
Power Requirements 220 Volts
50 Hertz
Single phase, 3 wire earthed
Power Consumption Microwave cooking 1.6 kW
Top Heater mode 1.3 kW
Grill cooking Bottom heater mode 0.9 kW
Double grill mode 2.1 kW
Convection cooking 2.1 kW
Power Output 900 W nominal of RF microwave energy (measured by method of IEC 705)
Operating frequency 2450 MHz
Grill heater Power Output (Top heater) 1200 W (600 W x 2)
Bottom heater Power Output 800 W
Case Dimensions Width 520 mm
Height 309 mm including foot
Depth 502 mm
Cooking Cavity Dimensions Width 352 mm
Height 207 mm
Depth 368 mm
Turntable diameter 325 mm
Control Complement Touch Control System
Clock (1:00 - 12:59) / Timer (0 - 99 minutes and 99 seconds)
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
Mix cooking
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