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5-9

COMPONENTS

TEST PROCEDURE

RESULTS

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.

Measure the resistance.
(Ohm-meter scale: Rx1000)
• Terminal to case.

Measure the continuity (Forward).
(Ohm-meter scale: Rx10000)

Measure the continuity (Reverse).
(Ohm-meter scale: Rx10000)

Normal: Momentarily indicates

several ohms, and then
gradually returns to
infinite.

Normal: Infinite.

Normal: Infinite.
Abnormal: Continuity.

Normal: Continuity.
Abnormal: Infinite.

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.

5-9

COMPONENTS

TEST PROCEDURE

RESULTS

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.

Measure the resistance.
(Ohm-meter scale: Rx1000)
• Terminal to case.

Measure the continuity (Forward).
(Ohm-meter scale: Rx10000)

Measure the continuity (Reverse).
(Ohm-meter scale: Rx10000)

Normal: Momentarily indicates

several ohms, and then
gradually returns to
infinite.

Normal: Infinite.

Normal: Infinite.
Abnormal: Continuity.

Normal: Continuity.
Abnormal: Infinite.

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.

5-9

COMPONENTS

TEST PROCEDURE

RESULTS

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.

Measure the resistance.
(Ohm-meter scale: Rx1000)
• Terminal to case.

Measure the continuity (Forward).
(Ohm-meter scale: Rx10000)

Measure the continuity (Reverse).
(Ohm-meter scale: Rx10000)

Normal: Momentarily indicates

several ohms, and then
gradually returns to
infinite.

Normal: Infinite.

Normal: Infinite.
Abnormal: Continuity.

Normal: Continuity.
Abnormal: Infinite.

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.

5-9

COMPONENTS

TEST PROCEDURE

RESULTS

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.

Measure the resistance.
(Ohm-meter scale: Rx1000)
• Terminal to case.

Measure the continuity (Forward).
(Ohm-meter scale: Rx10000)

Measure the continuity (Reverse).
(Ohm-meter scale: Rx10000)

Normal: Momentarily indicates

several ohms, and then
gradually returns to
infinite.

Normal: Infinite.

Normal: Infinite.
Abnormal: Continuity.

Normal: Continuity.
Abnormal: Infinite.

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.

Antenna

Gasket

Chassis

Filament

Antenna

Gasket

Chassis

Filament

Antenna

Gasket

Chassis

Filament

Antenna

Gasket

Chassis

Filament

Antenna

Gasket

Chassis

Filament

Antenna

Gasket

Chassis

Filament

Antenna

Gasket

Chassis

Filament

Antenna

Gasket

Chassis

Filament

Содержание LD510D

Страница 1: ...R Microwave Oven Service Manual LD510D CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ...

Страница 2: ...eration 2 proper door closing 3 seal and sealing surfaces arcing wear and other damage 4 damage to or loosening of hinges and latches 5 evidence of dropping or abuse C Before turning on microwave power for any service test or inspection within the microwave generating compartments check the magnetron wave guide or transmission line and cavity for proper alignment integrity and connections D Any de...

Страница 3: ...ATING PROCEDURE 4 1 SCHEMATIC DIAGRAM 4 2 CIRCUIT DESCRIPTION 4 3 SERVICE INFORMATION 5 1 TOOLS AND MEASURING INSTRUMENTS 5 1 MICROWAVE LEAKAGE TEST 5 1 MEASUREMENT OF MICROWAVE POWER OUTPUT 5 3 DISASSEMBLY AND ADJUSTMENT 5 3 INTERLOCK CONTINUITY TEST 5 8 COMPONENT TEST PROCEDURE 5 9 TROUBLE SHOOTING 5 12 EXPLODED VIEW 6 1 REPLACEMENT PARTS LIST 7 1 CONTENTS ...

Страница 4: ...e only It is not recommended for built in installation ITEM MODEL Power Requirement Power Output Microwave Frequency Magnetron Timer Outside Dimensions Cavity Dimensions Net Weight Shipping weight Control Complement Nameplate Location Accessories DESCRIPTION DEL10D 230 Volts AC50 Hz 1 00 Single phase 3 wire grounded 1 000 Watts full microwave power IEC60705 2 450 MHz 2M246 050 GF 207 8 W x 123 8 H...

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 properly installed around the dome of the tube whenever installing the magnetron 2 1 CAUTIONS Unlike other appliances the microwave oven is high voltage and high current equipment Though it is free fro...

Страница 6: ...nd the door or dents inside the cavity or on the exterior 2 Put the oven on a counter table or shelf that is strong enough to hold the oven and the food and utensils you put in it The control panel side of the oven is the heavy side Use care when handling 3 Do not block the vent and the air intake openings Blocking vent or air intake openings can cause damage to the oven and poor cooking results M...

Страница 7: ...ausing or Stopping Operation 1 Open oven door Oven stops cooking Timer maintains current time setting 2 Cooking resumes when door is closed 3 Turn timer knob counterclockwise to OFF to clear all cooking time To avoid damaging oven only heat in microwave oven when turntable is in place OPERATION CHECK Heating 1 Open oven door place food in oven and close door 2 Set timer knob to desired cooking tim...

Страница 8: ...SCHEMATIC DIAGRAM 4 2 ...

Страница 9: ...ING Both the primary and timer switches are cut off primary winding voltage of the high voltage transformer When the door is opened the secondary switch is opened and when the door is closed the secondary switch is closed The timer stirrerfan and fan motor stop As the door is opened if the contact of primary switch fails to open the fuse opens due to the large current surge caused by the monitor s...

Страница 10: ...tion leakage MEASURING MICROWAVE ENERGY LEAKAGE Pour 275 15cc of 20 5 C 68 9 F water in a beaker which is graduated to 600 cc and place the beaker on the center of the turntable Set the energy leakage monitor to 2 450 MHz and use it following the manufacturer s recommended test procedure to assure correct result When measuring the leakage always use the 2 inch 5cm spacer supplied with the probe Op...

Страница 11: ...e 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 When testing near a corner of the door keep the probe perpendicular to the surface making sure the probe horizontally along t...

Страница 12: ... and pull out control panel assembly carefully from the cavity refer to page 2 1 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 diam...

Страница 13: ...ary switch operate normally 2 After replacing the door check for microwave energy leakage with a survey meter Microwave energy must be below the limit of 4 mW cm with a 275 ml water load 3 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 ...

Страница 14: ...leakage tighten the mounting screws properly making sure there is no gap between the waveguide and the magnetron G REMOVING THE STIRRER FAN MOTOR 1 Lay the unit down on its back 2 Remove the stirrer fan motor cover The stirrer fan base cover is easily removed by pinching the eight parts with a wire cutting 3 Disconnect the leadwire from the stirrer fan motor terminals 4 Remove the screw securing t...

Страница 15: ...ket 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 AS...

Страница 16: ... is closed meter should indicate a closed circuit When the secondary switch operation is abnormal make the necessary adjustment or replace the switch using only the same type of switch C MONITOR SWITCH TEST Disconnect the wire leads from the monitor switch Connect the ohmmeter leads to the common COM and normally closed NC terminals of the switch The meter should indicate a closed circuit with the...

Страница 17: ...FORMER Wire leads removed MAGNETRON Wire leads removed 1 Measure the resistance Ohm meter scale Rx1 and Rx100 Primary winding Secondary winding Filament winding 2 Measure the resistance Ohm meter scale Rx1000 Primary winding to ground Filament winding to ground 1 Measure the resistance Ohm meter scale Rx1 Filament terminal 2 Measure the resistance Ohm meter scale Rx1000 Filament to chassis Approx ...

Страница 18: ...RE RESULTS 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 Measure the resistance Ohm meter scale Rx1000 Terminal to case Measure the continuity Forward Ohm meter scale Rx10000 Measure the continuity Reverse Ohm meter scale Rx10000 Normal Momentarily indicate...

Страница 19: ... CORRECT POSITION WHEN REMOVING THE WIRE LEADS FROM THE PARTS BE SURE TO GRASP THE CONNECTOR NOT THE WIRES 5 10 COMPONENTS TEST PROCEDURE RESULTS FAN MOTOR Wire leads removed MOTOR Wire leads removed Measure the resistance Ohm meter scale R x 100 Measure the resistance Ohm meter scale R x 1000 Normal Approx 350 450 ohm Abnormal Infinite or several K ohm Normal Approx 12 14K ohm Abnormal Infinite o...

Страница 20: ...ng many plug into one plug outlet and using them at the same time blown fuse or breaker Microwave oven plug is not inserted tightly Output power is too low Low AC input voltage Food temperature is too low Using metallic ware and allowing it to touch the oven wall Sparks occur Inconsistent intensity of microwave by their characteristics 1 Use plastic wrap or lid 2 Stir once or twice while cooking s...

Страница 21: ...ive power supply cord Replace power supply cord Defective thermostat Replace thermostat Check continuity of thermostat Check continuity of power supply cord TROUBLE 1 Oven does not operate at all NOTE All these switches must be replaced at the same time Refer to page 5 8 Normal Normal Abnormal Defective high voltage capacitor Replace high voltage capacitor Set is good condition defective fuse only...

Страница 22: ...lable Minimum 8 5 C temperature rise is normal condition CONDITION CHECK RESULT CAUSE REMEDY Output is low Lower than 90 of rating voltage Normal Abnormal Measure the output power Defective magnetron Replace magnetron Decrease in power source voltage with load Suggest customer contact local electric power utility co or qualified electrician Check the power source voltage ...

Страница 23: ...gh voltage capacitor Normal Check high vol tage capacitor Abnormal Defective high voltage diode Replace high voltage diode Normal Check high vol tage diode Abnormal Defective magnetron Replace magnetron Check magnetron TROUBLE 3 No microwave oscillation even though oven lamp and fan motor run NOTE Make sure the wire leads are in the correct position When removing the wire leads from the parts be s...

Страница 24: ...6 1 EXPLODED VIEW INTRODUCTION EV MODEL LD510D ...

Страница 25: ...6 2 DOOR PARTS 1007 1006 1013 1004 2385 2384 1005 EV ...

Страница 26: ...6 3 CONTROL PANEL PARTS 2007 2005 2003 W109 2015 2386 W102 2002 2014 EV ...

Страница 27: ...6 4 OVEN CAVITY PARTS 01 7037 3001 W108 W118 3009 W105 5024 EV ...

Страница 28: ...6 5 LATCH BOARD PARTS W102 4002 4003 4002 4000 4001 EV ...

Страница 29: ...6 6 INTERIOR PARTS 5041 W140 5001 5010 W140 5014 5016 5000 5007 5013 5002 5053 3007 W128 W110 W101 W109 W101 W109 W101 W108 W136 5015 5020 9000 5006 5055 5009 W102 5012 5049 5003 W140 3031 3006 EV ...

Страница 30: ...6 7 BASE PLATE PARTS 5008 6000 W115 6007 W108 W101 6001 EV ...

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