DOWNLOAD Sharp R-872M (serv.man5) Service Manual ↓ Size: 1.02 MB | Pages: 47 in PDF or view online for FREE

Model
R-872M (serv.man5)
Pages
47
Size
1.02 MB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Complete
File
r-872m-sm5.pdf
Date

Sharp R-872M (serv.man5) Service Manual ▷ View online

R-872M - 1
SERVICE MANUAL
MICROWAVE OVEN WITH
GRILL AND CONVECTION
  R-872(W)M/ R-872(SL)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
Personnel 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.
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 a fire.
SHARP CORPORATION
OSAKA, JAPAN
SERVICING
PRODUCT SPECIFICATIONS
GENERAL INFORMATION
APPEARANCE VIEW
OPERATING SEQUENCE
FUNCTION OF IMPORTANT
COMPONENTS
TROUBLESHOOTING GUIDE
AND TEST PROCEDURE
TOUCH CONTROL PANEL
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
MICROWAVE MEASUREMENT
WIRING DIAGRAM
PARTS LIST
R-872M - 2
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 High voltage
transformer. 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 High
voltage 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, High voltage 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 compo-
nent 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 should be carried out.
R-872M - 3
  PRODUCT DESCRIPTION
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
230 - 240 Volts / 50 Hertz / Single phase, 3 wire earthed
Power Consumption
Microwave cooking
1 .45kW  Approx. 6.2 A
Convection cooking
1.53 kW  Approx. 6.6 A
Top Grill mode ...................... 1.05 kW
Approx. 4.2 A
Grill cooking
Bottom Grill mode ................. 0.55 kW
Approx. 2.2 A
Top and Bottom  mode ......... 1.55 kW
Approx. 6.3 A
Micro and Top Grill ................. 2.4 kW
Approx. 10.2 A
Micro and Bottom Grill .......... 1.95 kW
Approx. 8.5 A
Dual cooking Micro and Convection
2.4 kW
Approx. 10.2A
Power Output
900 W nominal of RF microwave energy (measured by method of IEC 705)
Operating frequency 2450 MHz
Top Grill Grill heating element Power Output
1.0 kW
Bottom heating element Power Output
0.5 kW
Case Dimensions
Width 520 mm
Height 309 mm (including foot)
Depth 488 mm
Cooking Cavity Dimensions
Width  349 mm
Height 207 mm
Depth 357 mm
Turntable diameter
325 mm
Control Complement
Touch Control System
Clock (1:00 - 12:59) / Timer (0 - 99 minutes 90 sec.)
Microwave Power for Variable Cooking
 Repetition Rate;
100 (HIGH) ....................... Full power throughout the cooking time
70 (MEDIUM HIGH) .........................  approx. 70% of FULL Power
50 (MEDIUM) ...................................  approx. 50% of FULL Power
30 (MEDIUM LOW) ..........................  approx. 30% of FULL Power
10 (LOW) .........................................  approx. 10% of FULL Power
Convection temperature control range:
   250˚C, 230˚C, 220˚C, 200˚C, 180˚C, 160˚C, 130˚C, 100˚C, 70˚C and 40˚C
TIME keys, BREAKFAST key, PIZZA key, INSTANT COOK keys
AUTO COOK key, AUTO DEFROST key, INFO key, WEIGHT keys
LESS/MORE keys, CONVECTION TEMPERATURE key, GRILL key
DUAL CONVECTION/GRILL key, MICROWAVE POWER LEVEL key
STOP/CLEAR key, START/AUTO MINUTE key, TIMER key
WEIGHT CONVERSION key, AUTO START/CLOCK key,
Set Weight
Approx. 20 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
R-872M - 4
OVEN
9. Door seals and sealing surfaces
10.Ventilation openings
11.Outer cabinet
12.Power supply cord
13.Turntable
14.High rack
15.Low rack
1. Control panel
2. Oven lamp
3. Grill heating element (Top Grill)
4. Door opening button
5. Waveguide cover
6. Oven cavity
7. Turntable motor shaft
8. Grill heating element
(Bottom Grill)
CONTROL PANEL
BREAKFAST
PIZZA
MIXED GRILL
MINCED MEAT
CHICKEN PTNS
FRESH FISH
RICE/PASTA
FRESH VEG.
CAKE
OVEN CHIPS
BAKED POTATOES
nfo
1 Chilled Ready Meals
1 Meat Joint
1 Frozen Ready Meals
2 Poultry
3 Roast Beef /
3 Chicken Ptn, Steak, Chops
   Roast Lamb
4 Minced Meat
4 Roast Pork
5 Bread
5 Roast Poultry
LBS
KG
OZ
COOK
DEFROST AUTO
%
nfo
AUTO indicator, showing auto cooking on progress.
DEFROST indicator.
TOP GRILL indicator.
BOTTOM GRILL indicator
CONVECTION indicator.
COOK indicator showing oven in operation.
MICROWAVE indicator.
WEIGHT indicators.
LESS/MORE indicators.
DIGITAL DISPLAY.
INFO indicator for interactive display.
PIZZA key. Press to cook pizza.
AUTO DEFROST key.
INFO key for interactive display.
LESS/MORE keys. 
Press to shorten or lengthen heating time.
INSTANT COOK keys.
GRILL key.  
Press to select Grill
DUAL CONVECTION/GRILL key.
Press to select Dual Convection or Dual Grill.
AUTO START/CLOCK key.
Use to set the clock.
START/AUTO MINUTE key.
Press to start a programme.  Press to cook on
(HIGH) for 1 minute or increase time during
cooking in multiples of 1 minute.
% percentage microwave power level indicator.
BREAKFAST key.
TIME keys. 
Use to select cooking time.                  
STOP/CLEAR key.
Press once to stop a programme,
and/or twice to cancel a programme.
TIMER key
WEIGHT CONVERSION key
MICROWAVE POWER LEVEL key.
Press to select microwave 
power level.
WEIGH keys.
CONVECTION TEMPERATURE key.
AUTO COOK key.
R-872
9
7
10
4
1
8
6
5
3
2
10sec.
10sec.
10min.
10min.
1min.
1min.
Instant Cook
Instant Cook
BREAKFAST
PIZZA
MIXED GRILL
MINCED MEAT
CHICKEN PTNS
FRESH FISH
RICE/PASTA
FRESH VEG.
CAKE
OVEN CHIPS
BAKED POTATOES
AUTO
AUTO
COOK
COOK
AUTO
AUTO
DEFROST
DEFROST
Kg  Lb
Kg  Lb
LESS
LESS
GRILL
GRILL
TIMER
TIMER
Kg/Lb
Kg/Lb
DUAL
DUAL
CONVECTION
CONVECTION
GRILL
GRILL
MORE
MORE
CONVECTION
CONVECTION
(˚C)
C)
MICROWAVE
MICROWAVE
POWER LEVEL
POWER LEVEL
STOP/
STOP/
CLEAR
CLEAR
AUTOSTART
AUTOSTART
CLOCK
CLOCK
START
START
AUTO MINUTE
AUTO MINUTE
g  oz
g  oz
nfo
1 Chilled Ready Meals
1 Meat Joint
1 Frozen Ready Meals
2 Poultry
3 Roast Beef /
3 Chicken Ptn, Steak, Chops
   Roast Lamb
4 Minced Meat
4 Roast Pork
5 Bread
5 Roast Poultry
LBS
KG
OZ
COOK
DEFROST AUTO
%
nfo
10
12
11
14
15
13
APPEARANCE VIEW
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Sharp R-872M (serv.man5) Service Manual ▷ Download

  • DOWNLOAD Sharp R-872M (serv.man5) Service Manual ↓ Size: 1.02 MB | Pages: 47 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp R-872M (serv.man5) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp R-872M (serv.man5) Microwave Oven. Information contained in Sharp R-872M (serv.man5) 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.