R-205WM - Sharp Home Appliance Service Manual (repair manual)

r-205wm service manual
Model
R-205WM
Pages
24
Size
966.71 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven
File
r-205wm.pdf
Date

Read Sharp R-205WM Service Manual online

R-205M - 1
S20214R205M//
SHARP CORPORATION
SERVICE MANUAL
In  the 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
TABLE OF CONTENTS
Page
SERVICING ......................................................................................................................................  2
CAUTION, WARNING .......................................................................................................................  3
PRODUCT DESCRIPTION ...............................................................................................................  3
APPEARANCE VIEW .......................................................................................................................  4
OPERATION SEQUENCE ................................................................................................................  5
COMPONENT REPLACEMENT .......................................................................................................  6
TEST PROCEDURES .......................................................................................................................  7
CONTROL UNIT ASSEMBLY ...........................................................................................................   9
MICROWAVE LEAKAGE...................................................................................................................  13
WIRING / RE-WIRING........................................................................................................................ 14
SCHEMATIC DIAGRAM ...................................................................................................................  15
PICTORIAL DIAGRAM .....................................................................................................................  16
CONTROL UNIT DIAGRAM .............................................................................................................  17
PRINTED WIRING BOARD DIAGRAM ............................................................................................  18
PARTS LIST ......................................................................................................................................  19
EXPLODED DIAGRAM OF OVEN PARTS .......................................................................................  21
CONTROL PANEL AND DOOR PARTS ..........................................................................................  22
MISCELLANEOUS AND PACKING/ACCESSORIES .......................................................................  23
®
MODEL
R-205(W)M
R-205M - 2
Microwave ovens should not be used without a load.   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 microwave timer for one (1) minute, set the
power level to HIGH (100%).  When the one (1) minute has elapsed (timer at zero) carefully check that the water is now
hot.
AFTER REPAIR 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.
When all service work is completed, and the oven is fully assembled, the microwave power output should be checked
and microwave leakage test carried out.
IMPORTANT: If the oven becomes inoperative because of a blown fuse F1 in the monitored latch switch - monitor
switch circuit, check the monitored latch switch and monitor switch before replacing the fuse F1.
Sharp recommend that wherever possible, fault-finding is carried out with the supply disconnected.  In some
cases, it may be necessary to connect the supply with  the cover removed to carry out fault investigation in the
control circuitry.  In such cases, the high voltage circuit should be disabled as described below to reduce the
hazards:-
Carry out 3D checks (see above).
Disconnect the supply leads from the high voltage transformer, making a note of the polarity.  Insulate the
connectors, ensuring they are positioned away from the transformer and fastened there.
Connect any relevant test equipment e.g. voltmeter.
Reconnect the oven to the supply, then close the door.
Note the results of the test, taking care to keep clear of the operational oven.
Carry out 3D checks (see above).
Reconnect the leads to the transformer.  Take care to observe correct polarity.
Carry out 4R checks (see below).
 WARNING TO SERVICE PERSONNEL
SERVICING
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, High voltage wires.
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 seconds 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 using a screwdriver with an insulated handle.
R-205M - 3
WARNING
Servicing and repair work must be carried out only by
trained service engineers.
The parts marked '*' on the parts list and schematic
diagram have voltages in excess of 250V.
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.
CAUTION
MICROWAVE RADIATION
Do not become exposed to radiation from the
magnetron or other parts conducting microwave en-
ergy.  All input and output microwave connections,
waveguides, flanges and gaskets must be secured.
Never operate the device without a microwave en-
ergy absorbing load attached. Never look into an
open waveguide or antenna while the device is ener-
gized.
SPECIFICATION
Power Requirements
230 -240 Volts     50 Hertz     Single phase, 3 wire grounded
Power Consumption
1.2KW
Power Output
800 watts nominal of RF microwave energy (measured by way of IEC 60705)
Operating frequency of 2450 MHz
Case Dimensions
Width 449 mm     Height 282 mm including foot     Depth 369 mm
Cooking Cavity Dimensions
Width 287 mm     Height 220 mm     Depth 311 mm
Turntable diameter
272 mm
Control Complement
Electronic/Mechanical Control System
Microwave Power for Variable Cooking
     Repetition Rate :
    
HIGH .................... Full power throughout the cooking time
     
MEDIUM HIGH ..... approx. 70% of Full Power
     
MEDIUM ............... approx. 50% of Full Power
    
MEDIUM LOW ..... approx. 30% of Full Power
    
LOW ..................... approx. 10% of Full Power
Net Weight
Approx. 13.3 kg
 
    PRODUCT DESCRIPTION
WARNING
THIS APPLIANCE MUST BE EARTHED
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN
ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW : EARTH        BLUE : NEUTRAL        BROWN : LIVE
If the mains lead is replaced, only part number QACCBA009WRE0 should be used
CAUTION / WARNING
As part of our policy of continuous improvement, we reserve the right to
alter design and specifications without notice
R-205M - 4
7
1. Place the roller stay on the floor of
the oven cavity, engaging shaft into
turntable motor shaft.
2. Then place the turntable on roller
stay.
1
Door
2
Door hinges
3
Waveguide cover
4
Control panel
5
Coupling
6
Door open button
7
Door lock openings
8
Oven cavity
9
Door seals and sealing surfaces
10 Safety door latches
11 Ventilation openings
12 Outer cabinet
13 Power supply cord
Turntable
Roller stay
Seal packing
1
2
3
CONTROL PANEL
1.
Cooking Control
2.
Cook & Defrost Guide
3.
Timer (0 - 30 minutes)
APPEARANCE VIEW
OVEN
Page of 24
Display

Download Sharp R-205WM Service Manual (Repair Manual)

Here you can read online and download Sharp R-205WM Service Manual in PDF. R-205WM service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp R-205WM Microwave Oven. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.