DOWNLOAD Sharp R-24STM (serv.man6) Service Manual ↓ Size: 859.48 KB | Pages: 32 in PDF or view online for FREE

Model
R-24STM (serv.man6)
Pages
32
Size
859.48 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Complete
File
r-24stm-sm6.pdf
Date

Sharp R-24STM (serv.man6) Service Manual ▷ View online

R-24STM - 1
SHARP CORPORATION
SERVICE MANUAL
R
R-24STM
S81104R24STM/
TABLE OF CONTENTS
                                                                                                                                                                     Page
SERVICING.................................................................................................................................................. 2
WARNING/GENERAL IMPORTANT INFORMATION..................................................................................3
PRODUCT DESCRIPTION...........................................................................................................................4
APPEARANCE VIEW................................................................................................................................... 5
OPERATION SEQUENCE............................................................................................................................6
FUNCTION OF IMPORTANT COMPONENTS.............................................................................................7
TEST PROCEDURE....................................................................................................................................  8
DESCRIPTION OF LSI.................................................................................................................................11
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE........................................................ 14
MICROWAVE MEASUREMENT..................................................................................................................  19
WIRING/REWIRING.....................................................................................................................................  20
TEST DATA AT A GLANCE.........................................................................................................................  20
SCHEMATIC DIAGRAMS............................................................................................................................  21
PICTORIAL DIAGRAM.................................................................................................................................  22
CONTROL PANEL CIRCUIT.DIAGRAM......................................................................................................  23
SWITCH UNIT DIAGRAM.............................................................................................................................24
PRINTED WIRING BOARD DIAGRAM........................................................................................................  25
PRINTED WIRING BOARD OF SWITCH UNIT DIAGRAM..........................................................................26
PARTS LIST.................................................................................................................................................  27
EXPLODED DIAGRAM OF OVEN PARTS..................................................................................................  30
CONTROL PANEL PARTS/DOOR PARTS.................................................................................................   31
MISCELLANEOUS/PACKING & ACCESSORIES.......................................................................................   32
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-24STM - 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 wires.
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-24STM - 3
WARNING
Never operate the oven until the following points are ensured.
(A) The door is tightly closed.
(B) The door and oven 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 the parts list may cause undue
microwave exposure, by themselves, or when they are dam-
aged, loosened or removed.
SERVICE MANUAL
MICROWAVE OVEN
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.
SHARP CORPORATION
OSAKA, JAPAN
R-24STM
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.
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-24STM - 4
SPECIFICATION
  ITEM
   DESCRIPTION
Power Requirements
230 -240 Volts
50 Hertz
Single phase, 3 wire earthed
Power Consumption
1.2 kW
Power Output
800W watts nominal of RF microwave energy
(measured by way of IEC 60705)
Operating frequency of 2450 MHz
Case Dimensions
Width 449mm
Height 282mm including foot
Depth 366mm
Cooking Cavity Dimensions
Width 287mm
Height 220mm
Depth 311mm
Turntable diameter
272mm
Control Complement
Jog/Touch  Control System
Clock (1.00-12.59 or 0.00-23.59) - 12HR or 24HR setting
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
EXPRESS COOK button                  TIME/WEIGHT button
EXPRESS DEFROST button             POWER LEVEL button
START/AUTO MINUTE button
STOP/CLEAR button
Net Weight
Approx. 13 kg
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
PRODUCT SPECIFICATIONS
GENERAL INFORMATION
As part of our policy of continuous improvement, we reserve the right to
alter design and specifications without notice
Page of 32
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  • DOWNLOAD Sharp R-24STM (serv.man6) Service Manual ↓ Size: 859.48 KB | Pages: 32 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp R-24STM (serv.man6) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp R-24STM (serv.man6) Microwave Oven. Information contained in Sharp R-24STM (serv.man6) 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.