GE LMAB1240ST Manual - Free PDF Download

Page 2 - SAFETY PRECAUTIONS; CAUTION; MICROWAVE RADIATION

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 betaken to avoid possible exposure to excessive microwave energy. PRECAUTIONS TO BE OBSERVED BEFORE ANDDURIN...

Page 3 - CONTENTS

CONTENTS (Page) SAFETY PRECAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Inside front cover SPECIFICATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...

Page 4 - SPECIFICATIONS; DESCRIPTION

SPECIFICATIONS 1-1 This microwave oven is designed for household use only. It is not recommended for commercial purposes. DESCRIPTION LMAB1240ST 120 Volts AC 60 Hz (13.3A) 1500 Watts Single phase, 3 wire grounded 1200 Watts full microwave power (IEC60705) 2450 MHz 2M246-050GF 0 ~ 99 min. 99 sec. 20 ...

Page 5 - CAUTIONS

CAUTIONS 2-1 • DO NOT operate on a 2-wire extension cord during repair and use. • NEVER TOUCH any oven components or wiring during operation. • BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. • For about 30 seconds after the oven stops, an electric charge remains...

Page 6 - INSTALLATION; INSTALLING; WARNING

INSTALLATION 3-1 INSTALLING 1. Empty the microwave oven and clean inside it with a soft, damp cloth. Check for damage such asmisaligned door, damage around the door or dentsinside 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 ...

Page 7 - OPERATING INSTRUCTIONS; FEATURES

OPERATING INSTRUCTIONS 4-1 FEATURES CONTROL PANEL 1. DISPLAY: The display includes a clock and indicators that tell you the time of day, cook time settings, andcooking functions selected. 2. AUTO TOUCH: Touch this pad to cook without entering a cook time or power. 3. AUTO DEFROST: Touch this pad to ...

Page 8 - OPERATING SEQUENCE; CANCEL FUNCTION

4-2 OPERATING SEQUENCE The following is a description of component functionsduring oven operation. 1. SETTING THE CLOCK 2. CANCEL FUNCTION Touch the STOP/CLEAR pad whenever you needto cancel an entry or a function currently in use.The display will either return to the last item enteredor to the cloc...

Page 11 - CIRCUIT DESCRIPTION

GENERAL DETAILS • The low voltage transformer supplies the necessary voltage to the micom controller when power cord isplugged in. • When the door is closed, the primary switch is ON, the secondary switch is ON, and the monitor switch opens(contact COM and NO). WHEN SELECTING COOKING POWERLEVEL AND ...

Page 12 - SERVICE INFORMATION; TOOLS AND MEASURING INSTRUMENTS

NECESSARY TOOLS Tools normally used for TV servicing are sufficient.Standard tools are listed below. • Diagonal pliers• Long nose pliers• Phillips screwdriver• Flat blade screwdriver• Wrench (size 5mm)• Nutdriver (size 5mm)• Adjustable wrench• Soldering iron• Solder• Vinyl insulation tape• Polishing...

Page 13 - NOTES WHEN MEASURING; WARNING : AVOID CONTACTING ANY; SPECIAL TIP

MEASUREMENT WITH OUTER CASEREMOVED • When you replace the magnetron, measure for microwave energy leakage before the outer case isinstalled and after all necessary components arereplaced or adjusted.Special care should be taken in measuring thefollowing parts. (Circled area of Fig. below) - Around t...

Page 14 - MEASUREMENT OF MICROWAVE POWER OUTPUT

5-3 A. OUTER CASE REMOVAL 1) Disconnect the power supply cord from the outlet.2) Remove the screws from the rear of the case. The outer case must be moved backward to be liftedoff. B. POWER SUPPLY CORD 1) Remove the outer case.2) Disconnect two terminals and remove one screw of the ground terminal. ...

Page 16 - G. REMOVING THE TURNTABLE MOTOR

F. MAGNETRON REMOVAL 1) Disconnect the lead wire from the magnetron.2) Carefully remove the mounting screws holding the magnetron and the waveguide. 3) Remove the magnetron ASSEMBLY until the tube is clear from the waveguide. NOTE: 1. When removing the magnetron, make sure its dome does not hit any ...

Page 18 - A. PRIMARY INTERLOCK SWITCH TEST; B. SECONDARY INTERLOCK SWITCH TEST; INTERLOCK CONTINUITY TEST; WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION; COMPONENTS

A. PRIMARY INTERLOCK SWITCH TEST When the door is opened slowly, an audible click should be heard at the same time or successivelyat intervals and the latches should activate theswitches with an audible click. If the latches do not activate the switches whenthe door is closed, the switches should be...

Page 19 - COMPONENT TEST PROCEDURE

5-8 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 HIGHVOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THEHIGH VOLTAGE TRANSFORMER. (SEE P...

Page 22 - TROUBLE SHOOTING; CAUSE

5-11 TROUBLE SHOOTING CAUTIONS 1. Check grounding before checking for trouble.2. Be careful of the high voltage circuit.3. Discharge the high voltage capacitor. (See page 2-1)4. When checking the continuity of the switches or of the high voltage transformer, disconnect one lead wire from these parts...

Page 23 - CONDITION

5-12 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. Displa...

Page 27 - EXPLODED VIEW; INTRODUCTION

EXPLODED VIEW 6-1 INTRODUCTION DOOR PARTS CONTROL PANEL PARTS BASE PLATE PARTS OVEN CAVITY PARTS LATCH BOARD PARTS INTERIOR PARTS #EV#

Page 28 - DOOR PARTS

DOOR PARTS 6-2 13552A 13213A 13352A 13581A 14970A 14026A 15006A 13536A 13551A #EV#

Page 29 - CONTROL PANEL PARTS

CONTROL PANEL PARTS 6-3 24781M 23551A 23550D 24510L 24970A 23551B 268711 WTP018 24930D #EV#

Page 30 - OVEN CAVITY PARTS

OVEN CAVITY PARTS 6-4 36549S 33052A WTP013 33390G WTT010 WSZ185 33112U 35889A #EV#

Page 31 - LARCH BOARD PARTS

LARCH BOARD PARTS 6-5 WSZ085 466001 466003 466001 43500A #EV#

Page 34 - BASE PLATE PARTS

BASE PLATE PARTS 6-8 56170D 63302A 63303A WTT021 WSZ002 WTT028 647781 948502 #EV#