LG LMVM1945SB, Service Manual

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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.
TABLE OF CONTENTS
(Page)
SAFETY PRECAUTIONS ......................................................................................................... Inside front page
SPECIFICATIONS .......................................................................................................................................... 1-1
CAUTIONS ..................................................................................................................................................... 2-1
INSTALLATION .............................................................................................................................................. 3-1
OPERATING INSTRUCTIONS....................................................................................................................... 4-1
CONTROL PANEL ................................................................................................................................. 4-1
CONTROL PANEL INSTRUCTIONS ..................................................................................................... 4-2
OVERALL CIRCUIT DIAGRAM ...................................................................................................................... 5-1
SCHEMATIC DIAGRAM......................................................................................................................... 5-1
MATRIX CIRCUIT FOR TOUCH KEY BOARD ...................................................................................... 5-2
GENERAL INFORMATION FOR SERVICE ................................................................................................... 6-1
GENERAL PRECAUTIONS IN USE ...................................................................................................... 6-1
TRIAL OPERATION ............................................................................................................................... 6-1
FEATURES AND SPECIFICATIONS FEATURES................................................................................. 6-1
SERVICE 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 .......................................................................................................................... 7-11
INTERLOCK CONTINUITY TEST .......................................................................................................... 7-13
TEST AND CHECKOUT PROCEDURES AND TROUBLESHOOTING................................................. 7-14
A. TEST PROCEDURES................................................................................................................ 7-14
B. CHECKOUT PROCEDURES..................................................................................................... 7-16
C. TROUBLESHOOTING ............................................................................................................... 7-20
EXPLODED VIEW .......................................................................................................................................... 8-1
REPLACEMENT PARTS LIST ............................................................................................................... 8-9
SCHEMATIC DIAGRAM OF P.C.B. .......................................................................................................... 8-17
PRINTED CIRCUIT BOARD..................................................................................................................... 8-18
P.C.B. PARTS LIST ................................................................................................................................. 8-19