Table of Contents
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SERVICING .................................................................................................................................................2
CAUTION / WARNING ................................................................................................................................ 3
PRODUCT DESCRIPTION .......................................................................................................................... 3
OPERATION DATA ..................................................................................................................................... 4
OUTPUT POWER TEST PROCEDURE ..................................................................................................... 5
IMPORTANT COMPONENTS ..................................................................................................................... 5
TEST PROCEDURES ................................................................................................................................. 6
TOUCH CONTROL PANEL ASSEMBLY .................................................................................................... 8
COMPONENT PLACEMENT AND ADJUSTMENT ................................................................................... 12
WIRING / RE-WIRING ............................................................................................................................... 13
SCHEMATIC DIAGRAM ............................................................................................................................ 14
CONTROL PANEL CIRCUIT DIAGRAM ................................................................................................... 15
PRINTED WIRING BOARD DIAGRAM ..................................................................................................... 16
PART LIST ................................................................................................................................................. 17
EXPLODED DIAGRAM OF OVEN PARTS ............................................................................................... 20
CONTROL PANEL/DOOR PARTS ............................................................................................................ 21
MISCELLANEOUS/PACKING & ACCESSORIES ..................................................................................... 22
SERVICE MANUAL
STIR
TURN
KG
PCS MICRO COOK
Auto Cook
1 Roast Beef / Lamb
AUTO COOK/
DEFROST
2 Roast Pork
3 Roast Poultry
POWER LEVEL/
WEIGHT
4 Fresh Vegetables
5 Jacket Potatoes
STOP
CLEAR
6 Rice / Pasta
Auto Defrost
START
AUTO MINUTE
7
Meat Joint
8
Poultry
10min. 1min.
10sec.
900W
E
R-343
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
SHARP CORPORATION
R343M - 1
S03271R343M//
MICROWAVE OVEN
MODEL
R-343(W)M
R-343(G)M
R-343(SL)M
Page
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Table of Contents
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Summary of Contents for Sharp R-343WM
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Page 1: Table Of Contents
SCHEMATIC DIAGRAM ..........................14 CONTROL PANEL CIRCUIT DIAGRAM ....................15 PRINTED WIRING BOARD DIAGRAM ..................... 16 PART LIST ..............................17 EXPLODED DIAGRAM OF OVEN PARTS ....................20 CONTROL PANEL/DOOR PARTS ......................21 MISCELLANEOUS/PACKING & ACCESSORIES ..................22 SHARP CORPORATION R343M - 1... -
Page 2: Servicing
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. -
Page 3: Caution / Warning
CAUTION / WARNING CAUTION WARNING MICROWAVE RADIATION Servicing and repair work must be carried out only by trained service engineers. Do not become exposed to radiation from the The parts marked '*' on the parts list and schematic magnetron or other parts conducting microwave diagram have voltages in excess of 250V. -
Page 4: Operation Data
OPERATION DATA OFF CONDITION 5. When the door is opened during a cook cycle, the Closing the door activates all door interlock switches (latch switches come to the following condition. switch, monitored latch switch and stop switch). CONDITION DURING DOOR OPEN IMPORTANT SWITCH CONTACT... -
Page 5: Output Power Test Procedure
The power output of this oven is rated using the method specified by IEC-60705. Full details of how to carry out this procedure can be found in the Sharp Technical Training notes which is available from Sharp Parts Centre (part number SERV-LITMW01). -
Page 6: Test Procedures
TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER TOUCH CONTROL PANEL ASSEMBLY TEST To prevent an electric shock. Do not touch the electrical parts and the printed wiring CAUTION board. Because the control unit is " TRANSLESS CIRCUIT " and all electrical parts are used at A.C. - Page 7 TEST PROCEDURES (CONT'D) PROCEDURE COMPONENT TEST LETTER PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD (PWB) IS OPEN To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit on the PWB, this foil pattern acts as a fuse.
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Page 8: Touch Control Panel Assembly
TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 5) Buzzer Circuit The touch control section consists of the following circuits as The buzzer is responsive to signals from the LSI to emit shown in the touch control panel circuit. audible sounds (key touch sound and completion sound). - Page 9 DESCRIPTION OF LSI LSI(IZA919DR) The I/O signal of the LSI(IZA919DR) are detailed in the following table. Pin No. Signal Description 1-12 SEG0 - Segment data signal. SEG11 Connected to LCD. The relation between signals are as follows: LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
- Page 10 DESCRIPTION OF LSI Pin No. Signal Description Oven lamp, fan motor and turntable motor driving signal. To turn on and off shut off relay (RY1). H : +5V The square waveform voltage is deliv- L : 0V ered to the RY1 driving circuit. 20.0 msec Signal coming from tact switch.
- Page 11 TOUCH CONTROL PANEL ASSEMBLY SERVICING 1. Precautions for Handling Electronic Components B. On some models, the power supply cord between This unit uses CMOS LSI in the integral part of the circuits. the touch control panel and the oven proper is so When handling these parts, the following precautions long enough that they may be separated from each should be strictly followed.
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Page 12: Component Placement And Adjustment
COMPONENT REPLACEMENT AND ADJUSTMENT WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1. CARRY OUT 3D CHECKS. 2. Door hinge, support or latch hook is damaged. 2. Make sure that a definite "click" can be heard when the 3. -
Page 13: Wiring/ Re-Wiring
RE-WIRING Ensure the following: 1. Wires must not touch: a) High voltage parts. b) Parts that become hot. c) Sharp edges. d) Movable parts. 2. Positive lock connectors are fitted correctly. 3. Wires are connected correctly as per pictoral diagram. -
Page 14: Schematic Diagram
SCHEMATIC DIAGRAM 50Hz 230-240V BRN /17 G-Y/17 FUSE EARTH NOISE SUPPRESSION COIL 0.22 /250V 680K/0.5W 0.0033 /250V 0.0033 /250V 10M/0.5W OVEN MAGNETRON THERMAL THERMAL CUT-OUT CUT-OUT COM. MONITORED LATCH SWITCH STOP SWITCH MONITOR SWITCH POWER TRANSFORMER CAPACITOR 1.0 F 2100VAC H.V. -
Page 15: Control Panel Circuit Diagram
LIQUID CRYSTAL DISPLAY D1:11ES1 10min. Auto Cook / Defrost (J1) 1min. Power Level / Weigft 10sec. VRS1 Stop / Clear 10G471K Start / Auto o /M Minute OVEN LAMP TURNTABLE MOTOR FAN MOTOR IC1 IZA919DR 101M 1267Y ZD40 KRC101M HZ4C3 –... -
Page 16: Printed Wiring Board Diagram
WARNING: AC LINE VOLTAGE IS SUPPLIED TO ALL PARTS VRS1 SP30 ZD70 ZD40 (CF1) (C60) (C61) (R65) ZD20 CN-B ZD21 (SW60) (R64) WARNING: (WH-1) TRANSLESS (SW1) (SW2) (SW3) (SW4) (SW5) (SW6) (SW7) -
Page 17: Part List
PART LIST Note: The parts marked ' # ' have voltages in excess of 250V. The parts marked ' ∆ ' may cause undue microwave exposure when damaged, loosened or removed. §' 'mark : Spare part delivery section. ELECTRIC PARTS REF NO PART NO §... - Page 18 PART LIST Note: The parts marked ' # ' have voltages in excess of 250V. The parts marked ' ∆ ' may cause undue microwave exposure when damaged, loosened or removed. §' mark : Spare part delivery section. CONTROL PANEL PARTS CONTINUED REF NO PART NO §...
- Page 19 PART LIST Note: The parts marked ' # ' have voltages in excess of 250V. The parts marked ' ∆ ' may cause undue microwave exposure when damaged, loosened or removed. § 'mark : Spare part delivery section. DOOR PARTS REF NO PART NO §...
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Page 20: Exploded Diagram Of Oven Parts
EXPLODED DIAGRAM OF OVEN PARTS OVEN PARTS 7-12 4-20 4-16 4-10 7-11 4-11 6-14 4-12 7-11 4-15 4-14 4-23 NOTE: In the event of removing the turntable motor cover this part should be refitted using screw connection : LX-EZA045WRE0 (7-10) R343M - 20... -
Page 21: Control Panel/Door Parts
CONTROL PANEL/DOOR PARTS CONTROL PANEL PARTS 3 - 1 3-1E 3-1F 3 - 6 3-1D 3-2-3 3 - 6 3-2-2 3 - 3 3-2-1 3-1C 3 - 4 3 - 5 DOOR PARTS 5-10 R343M - 21... -
Page 22: Miscellaneous/Packing & Accessories
MISCELLANOUS /PACKING & ACCESSORIES MISCELLANEOUS TO. HVC TO. MG Actual wire harness may be different than illustration. PACKING AND ACCESSORIES *TOP PACKING FPADBA233WRK1 *DOOR PROTECTION SHEET SPADPA020WRE0 *POLYETHENE BAG SSAKHA047WRE0 *TRAY HOLDER (SPADPA015WRE0) MICROWAVE OVEN *ROLLER STAY *BOTTOM PACKING FPADBA234WRK3 TURNTABLE TRAY COOK BOOK &... - Page 23 NOTES R343M - 23...
- Page 24 Sharp Corp. 2000. Printed in UK. R343M - 24...