Microwave Oven Service Manual RS511P RS511MB RCS10MPA RCS511A RCS10MPSA RFS511G RFS12MPSA URS511MB RFS12G URS511P URCS511A RFS511SW2A CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SAFETY PRECAUTIONS This device is to be serviced only by properly qualified service personnel. Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be taken to avoid possible exposure to excessive microwave energy. PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY A) Do not operate or allow the oven to be operated with the door open.
CONTENTS (Page) SAFETY PRECAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Inside front cover SPECIFICATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1 CAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
SPECIFICATIONS SPECIFICA SPECIFICATIONS ITEM MODEL Power Requirement DESCRIPTION RS511P / RS511MB URS511MB / URS511P RCS511A / RFS511G URCS511A / RFS511SW2A 230 Volts AC 50 Hz 240 Volts AC 50 Hz 1,60 , 0 Watts 1,70 , 0 Watts Single phase, 3 wire grounded Power Output 1,100 Watts full microwave power (IEC 60705) Microwave Frequency 2,450 MHz Magnetron 2M282 Timer 0 ~ 60 min.
CAUTIONS Unlike other appliances, the microwave oven is high-voltage and high-current equipment. Though it is free from danger in ordinary use, extreme care should be taken during repair. MICROWAVE RADIATION Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating device if it is improperly used or connection.
INSTALLATIONS BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY. INSTALLING EARTHING INSTRUCTIONS 1. Empty the microwave oven and clean inside it with a soft, damp cloth. Check for damage such as misaligned door, damage around the door or dents inside the cavity or on the exterior. This microwave oven is designed to be used in a fully earthed condition. It is imperative, therefore, to make sure it is properly earthed before servicing 2.
FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PANEL Display Some items in display can be seen but will not glow. Pads TIME ENTRY Pads 1-0 HOLD 0%, DEFROST 20%, MEDUIM 50%, MED-HI 70% STOP/RESET START RS511P / URS511P 4-1 Use to enter heating time without changing preprogrammed number pads. Use to begin heating with preprogrammed times and power levels or to enter times for “Manual Time Entry” cooking. Use to select power level.
FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PANEL Display Some items in display can be seen but will not glow. Pads TIME ENTRY Pads 1-0 POWER LEVEL STOP/RESET START QTY2x RCS511A / URCS511A 4-2 Use to enter heating time without changing preprogrammed number pads. Use to begin heating with preprogrammed times and power levels or to enter times for “Manual Time Entry” cooking. Use to select power level. Oven can heat at full or reduced power.
FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PANEL Display Some items in display can be seen but will not glow. Pads DIAL Use to enter cooking time. QUICK SET Use to begin heating with preprogrammed times and power levels. 70%, 50%, DEFROST Use to select power level. Oven can heat at full or reduced power. START Use to start “Manual Time Entry” program or restart interrupted cooking cycle. Use to advance to next user option.
FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PANEL Display Some items in display can be seen but will not glow. Pads TIME ENTRY Pads 1-0 HOLD 0%, DEFROST 20%, MEDUIM 50%, MED-HI 70% STOP/RESET START RFS511SW2A 4-4 Use to enter heating time without changing preprogrammed number pads. Use to begin heating with preprogrammed times and power levels or to enter times for “Manual Time Entry” cooking. Use to select power level. Oven can heat at full or reduced power.
OPERATING INSTRUCTIONS FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PANEL TIME POWER ENTRY LEVEL - Display Some items in display can be seen but will not glow. QTY 2X Pads + 8 9 TIME ENTRY Use to enter heating time without changing preprogrammed number pads. Pads 1-0 Use to begin heating with preprogrammed times and power levels or to enter times for “Manual Time Entry” cooking. DIAL Use to enter times for “Manual Time Entry” cooking.
Cooking Displays Shows when power is connected to oven. Open and close door to clear. READY shows when oven control will accept entries. Appears after oven door is opened and closed. 33:33 shows heating time. When more than 1 heating stage is programmed, total time for all stages displays. COOK shows when oven is operating. 20 indicates the microwave power level used. If power level does not show, oven is heating at 100% power. Programming Displays Indicates programming mode.
Operation CAUTION Preprogrammed Times and Cook Level All preprogrammed pads arrive set at full power. To avoid fire, do not dry newspapers or clothes in microwave oven. Interrupting Option: Double Digit Option: Single Digit Pads Operation • Open oven door to interrupt operation. Oven fan continues to operate. Close door and press START pad to resume oven operation. • Press STOP/RESET pad to interrupt operation. Display continues to show countdown time.
PROGRAMMING Preprogrammed Number Pads Multiple Heating Stages Oven has 10 preprogrammed number pads. Follow instructions below to program heating times and power levels for customized cooking. Follow instructions below to program oven to perform 3 consecutive heating cycles without interruption. 1. Open oven door. ¥ If door is closed or STOP/RESET pad is pressed before finishing programming sequence, oven exits programming mode. 1. Open oven door.
4. Press START pad to advance to next option. See table for options. User Options Follow the instructions below to customized the microwave ovenÕs operation. End-of-cycle signal, maximum heating time and other options can be changed to meeting your cooking needs. 5. Press number pad (0,1-3) to change option. 6. Press START pad to save changes. ¥ Repeat steps 4-6 to change additional options. 1. Open oven door.
SCHEMATIC DIAGRAM 4-10
CIRCUIT DESCRIPTION • A high voltage of approximately 2100 volts AC is generated in the secondary of the high voltage transformer which is increased by the action of the high voltage diode and charging of the high voltage capacitor. • The negative 4,000 Volts DC is applied to the filament of the magnetron. GENERAL DETAILS • The low voltage transformer supplies the necessary voltage to the micom controller when power cord is plugged in.
SERVICE INFORMATION TOOLS AND MEASURING INSTRUMENTS NECESSARY TOOLS NECESSARY MEASURING INSTRUMENTS Tools normally used for TV servicing are sufficient. Standard tools are listed below.
MEASUREMENT WITH OUTER CASE REMOVED NOTES WHEN MEASURING ¥ Do not exceed meter full scale deflection. ¥ The test probe must be removed no faster than 1 inch/sec (2.5 cm/sec) along the shaded area, otherwise a false reading may result. ¥ The test probe must be held with the grip portion of the handle. A false reading may result if the operator's hand is between the handle and the probe.
MEASUREMENT OF MICROWAVE POWER OUTPUT • Microwave power output measurement is made with the microwave oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of (1000±5) g of potable water. • The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190mm. • The oven and the empty vessel are at ambient temperature prior to the start of the test.
Remove Remove choke choke cover cover D. PCB ASSEMBLY REMOVAL 1) Remove the control panel assembly from the cavity. (Refer to control panel assembly removal on previous page.) 2) Remove screws which hold the PCB SUB ASSÕY to the control panel. 3) Disconnect the flat cable from the PCB SUB ASSÕY and take off the PCB SUB ASSÕY PCB Sub Asm Control Panel Remove Remove door door Door seal plate E. DOOR MAIN ASSEMBLY REMOVAL 1) Open the door.
F. MAGNETRON REMOVAL G. REMOVING THE STIRRER FAN MOTOR 1) Disconnect the leadwire from the magnetron. 2) Carefully remove the mounting screws holding the magnetron and the waveguide. 3) Remove the magnetron ASS’Y until the tube is clear from the waveguide. 1) Disconnect the leadwire from the stirrer fan motor terminals. 2) Remove the screw securing the stirrer fan motor to the oven cavity ASS’Y 3) After repairing the motor, replace the removed leadwire. NOTE: 1.
H. HIGH VOLTAGE TRANSFORMER REMOVAL K. INTERLOCK SYSTEM 1) INTERLOCK MECHANISM The door lock mechanism is a device which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger resulting from the microwave leakage. 2) MOUNTING OF THE PRIMARY/MONITOR/ SECONDARY SWITCHES TO THE LATCH BOARD 3) INSTALLATION AND ADJUSTMENT OF THE LATCH BOARD TO THE OVEN ASSEMBLY 1) Discharge the high voltage capacitor.
INTERLOCK CONTINUITY TEST WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS. TYPE NO. SZM-V 21-FC-93 FOR PRIMARY SWITCH TYPE NO. SZM-V 16-FD-62 OR V-16-2C 25 FOR MONITOR SWITCH TYPE NO. SZM-V 16-FD-63 OR V-16-3C 25 FOR SECONDARY SWITCH B. SECONDARY INTERLOCK SWITCH TEST A. PRIMARY INTERLOCK SWITCH TEST Disconnect the wire lead from the secondary switch.
COMPONENT TEST PROCEDURE CAUTIONS 1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER. (SEE PAGE 2-1) 2. ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN CONTAINER) IN THE OVEN.
COMPONENTS TEST PROCEDURE RESULTS Antenna Gasket Chassis Filament NOTE: When testing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition. HIGH VOLTAGE CAPACITOR HIGH VOLTAGE DIODE NOTE : Some inexpensive meters may indicate infinite resistance in both direction. Measure the resistance. (Ohm-meter scale: Rx1000) ¥ Terminal to terminal. Normal: Momentarily indicates several ohms, and then gradually returns to infinite.
COMPONENTS RELAY 3 TEST PROCEDURE Check for continuity of relay 3 an ohm-meter. (Remove wire leads from relay 3 and operate the unit.) RESULTS POWER LEVEL 1 2 3 4 5 6 7 8 9 10 3 sec 4 sec 5 sec 6 sec 7 sec 8 sec 9 sec 10 sec 11 sec 12 sec 9 sec 8 sec 7 sec 6 sec 7 sec 4 sec 3 sec 2 sec 1 sec 0 sec Relay 3 BLOWER MOTOR (Wire leads removed) Measure the resistance. (Ohm-meter scale: R x 100) Normal: Approx. 72~82 ohm Abnormal: Infinite or several K-ohm.
TROUBLESHOOTING SHOOTING TROUBLE WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IF WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IF THE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THE THE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THE MICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL. MICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL.
(TROUBLE 1) The following visual conditions indicate a probable defective control circuit. 1. Incomplete segments. ¥ Segment missing. ¥ Partial segment missing. ¥ Digit flickering (NOTE: Slight flickering is normal.) 2. Colon does not turn on or blink. 3. A distinct change in the brightness of one or more numbers in display. 4. One or more digits in the display are not lighting. 5. Display indicates a number different from one touched, for example, key in 5 and 3 appears in the display. 6.
(TROUBLE 2) Oven does not operate at all, Display window does not display any figures, and no input is accepted. CONDITION CONDITION 1. Fuse blows. CHECK Check continuity of monitor switch (with door closed). RESULT Continuity. CAUSE Malfunction of the monitor switch. No continuity. REMEDY Replace fuse, primary, monitor, secondary switches, and RELAY(RY3) of P.C.B Assembly. Replace fuse Check continuity of primary switch (with door opened). Continuity.
(TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired program times are set and START pad is touched. CONDITION CONDITION CHECK 1. Setting time does not count down when touching START pad. Check continuity of secondary switch (with door closed). 2. Blower motor or oven lamp do not turn on. RESULT No continuity. CAUSE REMEDY Defective secondary switch. Replace secondary switch. Continuity. Check the connection between CN1 connector and PCB assembly.
(TROUBLE 5) No microwave oscillation even though oven lamp and blower motor run. (Display operates properly) CONDITION CONDITION No microwave oscillation. CHECK RESULT Disconnect the wire leads from relay 3 and check No continuity. continuity of relay 3 (Operate the unit) Continuity. Check high voltage transformer Abnormal CAUSE REMEDY Defective PCB assembly. Replace PCB assembly. Defective high voltage transformer. Replace high voltage transformer. Defective high voltage capacitor.
EXPLODED VIEW INTRODUCTION MODEL : RS511MB RFS511G URS511MB OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS DOOR PARTS LATCH BOARD PARTS CONTROL PANEL PARTS 6-1
#EV# EXPLODED VIEW INTRODUCTION MODEL : RCS511A RS511P RFS511SW2A URS511P URCS511A OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS DOOR PARTS LATCH BOARD PARTS CONTROL PANEL PARTS 6-2
#EV# DOOR PARTS MODEL : RS511MB RFS511G URS511MB RCS511A RS511P RFS511SW2A URS511P URCS511A 1013 1005 1004 1385 1002 1000 W136 1006 1007 W108 1384 1009 W206 1386 W207 6-3 W105
#EV# CONTROL PANEL PARTS MODEL : RFS511G 2012 W102 2006 2381 W130 2000 2005 2400 6-4
#EV# CONTROL PANEL PARTS MODEL : RS511MB URS511MB 2012 W102 2381 2002 2006 W130 2000 2005 2400 6-5
#EV# CONTROL PANEL PARTS MODEL : RS511P URS511P 2004 W102 2006 2381 W130 2000 2002 6-6
#EV# CONTROL PANEL PARTS MODEL : RCS511A RFS511SW2A URCS511A 2004 W102 2381 2006 W130 2000 6-7
#EV# OVEN CAVITY PARTS MODEL : RS511MB RFS511G URS511MB RCS511A RS511P RFS511SW2A URS511P URCS511A 5045 W109 3001 W158 W121 W109 W121 W105 3009 W109 5024 3004 9000 7037 W109 W108 6-8
#EV# LATCH BOARD PARTS MODEL : RS511MB RFS511G URS511MB RCS511A RS511P RFS511SW2A URS511P URCS511A 4001 W102 4003 4009 W117 W160 4008 4002 4004 4000 6-9
#EV# INTERIOR PARTS MODEL : RS511MB RFS511G URS511MB RCS511A RS511P RFS511SW2A URS511P URCS511A Discord original for parts supplied. Change pieces simultaneously.
#EV# BASE PLATE PARTS MODEL : RS511MB RFS511G URS511MB RCS511A RS511P RFS511SW2A URS511P URCS511A 6001 W121 6000 3901 W162 3902 3026 W121 6013 W108 6-11
SCHEMATIC DIAGRAM OF P.C.
PRINTED CIRCUIT BOARD 7-2
