삼 정 흥 판 MODEL 721.62642 / 721.80592 721.62649 / 721.80599 721.62644 / 721.80594 721.62643 / 721.80593 DIVISION 22 BASIC FIELD MANUAL FOR MICROWAVE OVEN MODEL 721.62642400 / 721.80592401 / 721.80592402 721.62649400 / 721.80599401 / 721.80599402 721.62644400 / 721.80594401 / 721.80594402 721.62643400 / 721.80593401 / 721.
CAUTION SAFETY PRECAUTIONS 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. b.
FOREWORD Read this Manual carefully. Failure to adhere to or observe the information in this Manual may result in exposing yourself to the Microwave Energy normally contained within the oven cavity. MODEL 721.62642 / 721.80592 721.62649 / 721.80599 721.62644 / 721.80594 721.62643 / 721.
SPECIFICATIONS Rated Power Consumption - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1500W maximum (Microwave oven+Cook top lamps+Ventilation fan) Microwave Output - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1000W (IEC60705) Adjustable 100W through 1000W, 10 steps Frequency - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2450 MHz ± 50 MHz Power Supply - - - - - - - - -
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. PRECAUTIONS ON INSTALLATION A. Plug the power supply cord into a 120V AC, 60Hz, single-phase power source with a capacity of 15A or 20A. B. Avoid placing the unit in a location where there is direct heat or splashing water. C. Install the unit on the mounting plate firmly. D. Place the unit as far away as possible from TV, radio, etc. to prevent interference.
OPERATING INSTRUCTIONS CONTROL PANEL 1 4 2 5 3 7 6 8 9 10 13 14 11 12 16 17 15 18 20 19 21 22 23 25 24 28 29 26 27 4-1
CONTROL PANEL INSTRUCTIONS 1. Display. The display includes a clock and indicators to tell you time of day, cooking time settings, cook powers, quantities, weights and cooking functions selected. 16. Express Defrost. Touch this pad to express defrost. “GROUND BEEF 1.0 LBS TOUCH START” will appear in the display. 2. Dinner Plate. Touch this pad to cook without entering a cook time or power. 17. Add Minute.
OVERALL CIRCUIT DIAGRAM SCHEMATIC DIAGRAM (I) *Check the Model No.
SCHEMATIC DIAGRAM (II) *Check the Model No. (ADD Noise filter) RY1 O.L RY11 V.M RY14 C.L HIGH RY15 C.L NIGHT RY6 T.
MATRIX CIRCUIT FOR TOUCH KEY BOARD 5-3
GENERAL INFORMATION FOR SERVICE GENERAL PRECAUTIONS IN USE FEATURES AND SPECIFICATIONS FEATURES A. Never operate the unit when it is empty. Operating the oven with no load may shorten the life of the magnetron. Whenever cooking dry foods (dried fish, bread, etc.) or a small amount of food, be sure to put a glass of water into the cooking compartment. The glass turntable may become hot after operating, be careful when touching it. B.
SERVICE INFORMATION PRECAUTIONS AND REPAIR SERVICE TIPS PRELIMINARY (3) Do not operate the unit until it is completely repaired, if any of the following conditions exist. The unit must not be operated. (a) The door does not close firmly. (b) The hinge is broken. (c) The door seal is damaged. (d) The door is bent or warped, or there is any other visible damage on the unit that may cause microwave energy leakage. NOTE: Always keep the seal clean.
MICROWAVE LEAKAGE TEST CAUTIONS MEASURING MICROWAVE ENERGY LEAKAGE • Be sure to check microwave leakage prior to servicing the oven if the oven is operative prior to servicing. • The service personnel should inform the manufacture importer, or assembler of any certified oven unit found to have a microwave emission level in excess of 5 mW/cm2 and should repair any unit found to have excessive emission levels at no cost to the owner and should ascertain the cause of the excessive leakage.
MEASUREMENT WITH THE OUTER CASE REMOVED NOTE WHEN MEASURING (1) Do not exceed meter full scale deflection. (2) The test probe must be removed no faster than 1 inch/sec (2.5cm/sec) along the shaded area, otherwise a false reading may result. (3) 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.
DISASSEMBLY INSTRUCTIONS (4) Remove 3 screws securing the circuit board. IMPORTANT NOTES: UNIT MUST BE DISCONNECTED FROM ELECTRICAL OUTLET WHEN MAKING REPAIRS, REPLACEMENTS, ADJUSTMENTS AND CONTINUITY CHECKS. WAIT AT LEAST ONE MINUTE, UNTIL THE HIGH VOLTAGE CAPACITOR IN THE HIGH VOLTAGE POWER SUPPLY HAS FULLY DISCHARGED. THE CAPACITOR SHOULD BE DISCHARGED BY USING INSULATED WIRE - I.E. TEST PROBE CONNECTED TO 10K-OHM RESISTOR IN SERIES TO GROUND.
HOW TO REMOVE THE F.P.C. CONNECTOR HOW TO INSERT THE F.P.C. CONNECTOR Follow the steps below as illustrated in Figures 4 and 5 to remove the F.P.C. connector. Follow the steps below as illustrated in Figures 6 and 7 to insert the F.P.C. connector. (1) Hold the edges of the plastic fastener with thumb and forefinger. (Figure 4) (2) Lift up the lever of the plastic fastener from the terminal socket by lightly pressing the lever end with forefinger. (Figure 5) (3) Remove the F.P.C.
B. REMOVING THE OUT CASE(Figure 8) (1) Remove the vent grille by removing two screws securing it to the out case. (2) Remove two screws securing it to the front bracket. (3) Remove two screws securing it to the air duct. (4) Remove the mounting plate by turning the two screws securing it to the out case. (5) Remove the base plate by removing four screws securing it to the out case. Remove the Mount, All from the out case by removing two screws securing it to the out case.
C. REMOVING THE DOOR INTERLOCK SWITCHES (Figures 9,10) (1) Disconnect the wire leads from the interlock switches. (2) Remove two screws securing the Latch Board. (3) Make necessary replacements and check microwave energy leakage according to “ADJUSTMENT PROCEDURE” on page 7-12.
NOTES: • When removing the magnetron, make sure that its dome does not hit any adjacent parts, or it may be damaged. D. REMOVING MAGNETRON (Figures 11 Through 13) (1) Remove the vent grille. (2) Remove mount, all. (3) Remove outcase. (4) Disconnect the wireleads. (5) Remove the three screws and Magnetron very carefully. • When replacing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition.
E. REMOVING DOOR (Figure 14) (1) Remove the vent grille by two screws securing it to the outcase loosening. (2) Lift up and draw the door. NOTES: • After replacing the door, be sure to check that the primary interlock switch, the secondary interlock switch and the interlock monitor switch operate normally. • After replacing the door, check for microwave energy leakage with a survey meter. Microwave energy leakage must be below the limit of 5mW/cm2. (With a 275 ml water load) Figure 14 F.
(3) Carefully pull the ventilation motor ASS'Y out of the microwave oven. (See Figure 18) G. ASSEMBLING DOOR (1) When mounting the door assembly to the oven assembly, be sure to adjust the door assembly parallel to the chassis. Also adjust so the door has no play between the inner door surface and oven frame assembly. If the door assembly is not mounted properly, microwaves may leak from the clearance between the door and the oven. Space Figure 18 H.
I. REMOVING THE TURNTABLE MOTOR (1) Remove the turntable. (2) Remove the turntable shaft VERY CAREFULLY with a slotted screwdriver. (Figure 19) (3) Remove the base plate by removing eight screws securing it to the oven cavity. (Figure 20) (4) Disconnect the leadwire from the turntable motor terminals. (5) Remove a screw securing the turntable motor to the oven cavity ASS'Y. (Figure 21) NOTES: • Remove the leadwire from the turntable motor VERY CAREFULLY.
INTERLOCK SYSTEM 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. ADJUSTMENT PROCEDURES To avoid possible exposure to microwave energy leakage, adjust the door latches and interlock switches, using the following procedure. CHECK THE DOOR LATCH AND SWITCH CLOSING. NOTE: The outer cover of the microwave oven is removed.
TEST THE LATCH AND SWITCH SEQUENCE (7) When you achieve the proper sequence of switches in Steps 5 and 6, tighten the latch board screws at that point. (5) Open the oven door slowly. Watch the door latch, the Secondary Switch.
INTERLOCK CONTINUITY TEST A. PRIMARY INTERLOCK SWITCH TEST B. SECONDARY INTERLOCK SWITCH TEST When the door is opened slowly, an audible click should be heard at the same time or successively at intervals and the latches should activate the switches with an audible click. If the latches do not activate the switches when the door is closed, the switches should be a adjusted in accordance with the adjustment procedure. Disconnect the wire lead from the primary switch.
TEST AND CHECKOUT PRECEDURES AND TROUBLESHOOTING - CAUTIONS Filament Winding - DISCONNECT THE POWER SUPPLY CORD FROM THE WALL OUTLET WHENEVER REMOVINGING THE CABINET FROM THE UNIT. PROCEED WITH THE TESTS ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER. (SEE FIGURE 24) Secondary Winding - ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN CONTAINER) IN THE OVEN.
COMPONENTS TEST PROCEDURES Measure the resistance: (1) Terminal to terminal RESULTS Normal reading: Momentarily indicates several ohms, and then gradually returns to infinite ohms. Abnormal reading: Indicates continuity or infinite ohms from the beginning. Ohmmeter Figure 25-a HIGH-VOLTAGE CAPACITOR (2) Terminal to case Normal readings: Infinite. Abnormal reading: Indicates continuity. Ohmmeter Figure 25-b Normal readings: continuity.
COMPONENTS TEST PROCEDURES Measure the resistance between terminal pins of connector KEY CONNECTOR. NOTE: When reconnecting the FPC connector, make sure that the holes on the FPC connector are properly engaged with hooks on the plastic fastener. MATRIX CIRCUIT FOR TOUCH KEY BOARD CONNECTOR(KEY CON) (For detail matrix circuit of each model, refer to page 5-2.
COMPONENTS TEST PROCEDURES Check for continuity of relay 2 with an ohm-meter. (Remove wire leads from relay 2 and operate the unit.) Relay 2 RELAY2 Figure 30 CAUTION: The relay connector 2 must be correctly connected Relay 2.
(2) CHECKOUT PROCEDURES FOR RELAY. - PROBLEM (A) Oven lamp turn on without touching START key when the door is closed. NO GOOD YES Remove the mate connector of I/O CON from the circuit board. Does the unit still operate? NO Replace the circuit board YES Defective RELAY1 Replace RELAY1 - PROBLEM (B) Oven lamp turn on When the door is closed and START key is touched. YES GOOD NO Measure the voltage at pin NO.
(3) CHECKOUT PROCEDURES FOR CIRCUIT BOARD The following symptoms indicate a defective circuit board. 1) The start function fails to operate but the high voltage Systems, the interlock switches, the door sensing and the relay check good. 2) The unit with a normal relay continuously operates. 3) Proper temperature measurement is not obtained. 4) The buzzer does not sound or continues to sound.
7-21 Check: 1. POWER SUPPLY 2. FUSE (See “CHECKOUT PROCEDURES FOR FUSE BLOWING: on page 7- 18) 3. OVEN CAVITY THERMOSTAT 1 PROBLEM - B: Display does not show correct numbers and/ or correct indications when programmed. 1 PROBLEM - A: “PLEASE SET TIME OF DAY” does not appear in display window when power supply cord is plugged into wall outlet. C. TROUBLE SHOOTING Before following this troubleshooting read “TRIAL OPERATION” on page 6- 1.
7-22 2 1 Check: 1. PRIMARY AND SECONDARY INTERLOCK SWITCHES 2. THERMOSTAT PROBLEM - C: Unit does not heat up even if display counts down when START key is touched for “HIGH POWER” cooking.
7-23 1 PROBLEM - D: No buzzing when touching the key, between stages or at end of cooking
7-24 1 Check: 1. POWER SUPPLY 2. FUSE PROBLEM - E: Ventilation fan does not operate when “FAN HIGH/ LOW” key is touched.
#EV# EXPLODED VIEW DOOR PARTS Model: 721.62642400 / 721.80592401 / 721.80592402 721.62649400 / 721.80599401 / 721.80599402 721.62644400 / 721.80594401 / 721.80594402 721.62643400 / 721.80593401 / 721.80593402 1005 1004 1002 1000 For 721. 62643 721.
#EV# CONTROLLER PARTS FOR MODEL: 721.62642 721.62649 721.62644 721.80592 721.80599 721.80594 2004 2006 2002 2000 W106 *07 2008 2381 FOR MODEL: 721.62643 721.
#EV# OVEN CAVITY PARTS W138 W142 FOR MODEL 3010 721. 62642 721. 62644 721. 80592 721. 80594 W109 W138 W142 FOR MODEL 721. 62649 721. 62643 721. 80599 721.
#EV# LATCH BOARD PARTS 4000 4002 W102 4001 4003 4002 4004 8-4
#EV# INTERIOR PARTS (I) 3002 W101 3012 5009 W108 3008 5008 5035 3037 3009 W101 W105 W108 5018 W101 5002 5034 5000 8-5
#EV# INTERIOR PARTS (II - I) Model: 721.80592401 721.80599401 721.80594401 721.80593401 Check the rating label of Model and order SVC parts according to the Model No. 3027 5015 5037 5045 5038 W108 W109 5337 * Check the Model No. * Check the Model No. 5010 5006 W136 5001 * Check the Model No. 5005 5004 5016 5011 W101 * Check the Model No.
#EV# INTERIOR PARTS (II - II) Model: 721.80592402 721.80599402 721.80594402 721.80593402 Check the rating label of Model and order SVC parts according to the Model No. 3027 5015 5037 5045 5038 W108 W109 5337 * Check the Model No. * Check the Model No. 5010 5006 W136 5001 * Check the Model No. 5004 5016 5011 W101 * Check the Model No.
#EV# INSTALLATION PARTS 6008 W109 6011 6010 6009 VINYL BAG 8-8
P/NO : 3828W5S5158 Printed in Korea