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7-17

COMPONENTS TEST

PROCEDURES

RESULTS

TOUCH KEY

BOARD

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.)

FPC CONNECTOR

Top

Resistance

value

When
touched

Less than
400 ohms

When not
touched

More than
1 mega ohm

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Содержание 721.80412500

Страница 1: ...N 22 BASIC FIELD MANUAL FOR MICROWAVE OVEN MODEL 721 80412500 721 80412501 721 80419500 721 80419501 721 80414500 721 80414501 721 80413500 721 80413501 May 2005 MODEL 721 80412 721 80419 721 80414 72...

Страница 2: ...lignment integrity and connections d Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or adjusted...

Страница 3: ...E INFORMATION 7 1 PRECAUTIONS AND REPAIR SERVICE TIPS 7 1 MICROWAVE LEAKAGE TEST 7 2 POWER OUTPUT MEASUREMENT 7 3 DISASSEMBLY INSTRUCTIONS 7 4 INTERLOCK SYSTEM 7 12 INTERLOCK CONTINUITY TEST 7 14 TEST...

Страница 4: ...t 90 C 5 C Fuse 20A Primary Interlock Switch Secondary Interlock Switch Interlock Monitor Switch Magnetron 2M214 161GP High Voltage Capacitor Capacitor 1 0 F 2 1 KV AC High Voltage Diode Diode 350mA 9...

Страница 5: ...operation of the microwave oven requires that the magnetron be assembled to the waveguide and cavity Never operate the magnetron unless it is properly installed Be sure that the magnetron gasket is pr...

Страница 6: ...he event of an electrical short circuit grounding reduces the risk of electrical shock The plug must be plugged into an outlet that is properly installed and grounded 3 1 INSTALLATIONS BEFORE YOU BEGI...

Страница 7: ...4 1 OPERATING INSTRUCTIONS CONTROL PANEL 1 2 5 8 12 16 19 22 17 9 3 7 6 11 13 14 15 18 21 24 20 10 4 23 6...

Страница 8: ...w frozen meat by weight 12 Number Pads Touch number pads to enter cooking times cook powers quantities weights or food categories 13 Express Defrost Touch this pad to express defrost GROUND BEEF 1 0 L...

Страница 9: ...5 1 OVERALL CIRCUIT DIAGRAM SCHEMATIC DIAGRAM RY1 O L RY14 C L HIGH RY15 C L NIGHT RY11 V M RY6 T M...

Страница 10: ...5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD...

Страница 11: ...omes on The unit will begin cooking and the display window will show the time counting down by seconds D After about 5 minutes make sure the primary interlock switch the secondary interlock switch and...

Страница 12: ...ll service adjustments should be made for minimum microwave energy leakage readings 3 Do not operate the unit until it is completely repaired if any of the following conditions exist The unit must not...

Страница 13: ...crowave oven should not exceed 4 mW cm2 Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage EQUIPMENT TESTER VOLTS DC AC Ohmmeter Microwave surve...

Страница 14: ...ve been used 3 At least once a year have the electromagnetic energy leakage monitor checked for calibration by its manufacturer 1 Microwave power output measurement is made with the microwave oven sup...

Страница 15: ...ALL CIR CUIT DIAGRAM ESPECIALLY SWITCHES AND HIGH VOLTAGE CIRCUIT A REMOVING POWER AND CONTROL CIRCUIT BOARD Figures 1 2 and 3 1 Remove a screw securing the control panel assembly to the oven cavity 2...

Страница 16: ...ONNECTOR Follow the steps below as illustrated in Figures 6 and 7 to insert the F P C connector 1 Insert the F P C connector into the terminal socket securely with the fingers 2 Hold the plastic faste...

Страница 17: ...move 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 remo...

Страница 18: ...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 Latch Board Secondary I...

Страница 19: ...cent parts or it may be damaged 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 After replacing the magnet...

Страница 20: ...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 F D...

Страница 21: ...ounted properly microwaves may leak from the clearance between the door and the oven H REMOVING THE VENTILATION FAN ASS Y 1 Remove the mounting plate by removing two screws securing it to the back pla...

Страница 22: ...emoving 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...

Страница 23: ...nt of the latch board may not be necessary Go to Steps 5 and 6 to check the sequence of the switches NOTE To correct sequence of the Primary Interlock Switch Secondary Interlock Switch and the Interlo...

Страница 24: ...the body of the switches in the following sequence Interlock Monitor Switch Primary Interlock Switch Secondary Interlock Switch NOTE The Interlock Monitor Switch is an added safety check on the Primar...

Страница 25: ...he secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch C MONITOR SWITCH TEST Disconnect the wire lead from the monitor switch C...

Страница 26: ...ads are removed 1 Measure the resistance Across the filament terminals of the magnetron with an ohm meter on Rx1 scale 2 Measure the resistance Between each filament terminal of the magnetron and the...

Страница 27: ...mentarily indicates several ohms and then gradually returns to infinite ohms Abnormal reading Indicates continuity or infinite ohms from the beginning Normal readings Infinite Abnormal reading Indicat...

Страница 28: ...necting 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 c...

Страница 29: ...k switches and or the interlock monitor switches are adjusted or replaced 7 18 COMPONENTS TEST PROCEDURES RESULTS RELAY2 Check for continuity of relay 2 with an ohm meter Remove wire leads from relay...

Страница 30: ...Does the unit still operate Replace the circuit board Replace RELAY1 NO NO YES YES GOOD Defective RELAY1 PROBLEM B Oven lamp turn on When the door is closed and START key is touched Measure the voltag...

Страница 31: ...perates 3 Proper temperature measurement is not obtained 4 The buzzer does not sound or continues to sound 5 Some segments of one or more digits do not light up or they continue to light up or segment...

Страница 32: ...ru E BUZZER Problems F PROBLEM A PLEASE SET TIME OF DAY does not appear in display window when power supply cord is plugged into wall outlet PROBLEM B Display does not show correct numbers and or corr...

Страница 33: ...7 22 PROBLEM C Unit does not heat up even if display counts down when START key is touched for HIGH POWER cooking Check 1 PRIMARY AND SECONDARY INTERLOCK SWITCHES 2 THERMOSTAT 1 2...

Страница 34: ...7 23 PROBLEM D No buzzing when touching the key between stages or at end of cooking 1...

Страница 35: ...7 24 PROBLEM E Ventilation fan does not operate when FAN HIGH LOW key is touched 1 Check 1 POWER SUPPLY 2 FUSE...

Страница 36: ...ODED VIEW DOOR PARTS 1005 1000 1002 1004 1006 1007 1011 1009 1381 For 721 80413 1003 1008 W109 EV Model 721 80412500 721 80412501 721 80419500 721 80419501 721 80414500 721 80414501 721 80413500 721 8...

Страница 37: ...8 2 CONTROLLER PARTS 2004 2002 2000 2008 2381 2006 W106 07 2004 2008 2006 W106 07 2381 EV FOR MODEL 721 80412 721 80419 721 80414 FOR MODEL 721 80413...

Страница 38: ...W138 W142 W142 W142 3001 3029 3024 3003 3036 3018 3034 3026 3028 5036 3026 3025 3011 6000 5038 3014 6001 W118 W118 W109 3010 FOR MODEL 721 80412 721 80414 FOR MODEL 721 80419 721 80413 8 3 OVEN CAVITY...

Страница 39: ...8 4 4000 W102 4001 4002 4003 4002 4004 LATCH BOARD PARTS EV...

Страница 40: ...8 5 INTERIOR PARTS I 3002 3012 3008 W101 5009 W108 5008 5035 W101 5034 5000 5002 5018 W101 W105 3009 W108 3037 EV...

Страница 41: ...3027 5015 5045 5037 5038 5006 5010 5016 5014 W109 W108 5337 5004 5011 5058 5044 5043 3004 W136 W101 5041 5001 5024 8 6 INTERIOR PARTS II EV...

Страница 42: ...8 7 INSTALLATION PARTS 01 OWNERS MANUAL 02 SERVICE MANUAL 06 1 UPPER TEMPLATE 06 2 WALL TEMPLATE 04 INSTALLATION MANUAL 05 COOKING GUIDE LABEL 6008 W109 6011 6010 6009 VINYL BAG EV...

Страница 43: ...Printed in Korea P NO 3828W5S5237...

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