LG hfe lg electronics lst-3510a service en free download

File name hfe_lg_electronics_lst-3510a_service_en.pdf

SET-TOP BOX SERVICE MANUAL MODEL : LST-3510A CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. SECTION 1 SUMMARY CONTENTS OVERVIEW...1-2 PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS...1-3 SERVICING PRECAUTIONS...1-4 SPECIFICATIONS ...1-5 LOCATION OF CUSTOMER CONTROLS ...1-6 1-1 OVERVIEW 1 Description - Digital HDTV receiver/DVD player can receive a ground HD digital broadcasting signal and play a DVD. - Configuration LST3500 largely consists of 4 boards - ATSC board, Front Panel board, SMPS board, and DVD board. Each board consists of the followings: ATSC board - System part It consists of CPU, Flash Memory, System Memory, MPEG-II Decoder, and EPLD. It controls the operation of the entire system, and handles MPEG A/V data. - Tuner part It generates TP signal by transmitting IF of the desired channel from the RF signal to the VSB receiver. - A/V signal output part It processes the A/V signal handled by the DAC to output. Front Panel board - Front part It is located at the front, which receives various key inputs of users and displays the state of the set-top box at the VFD. SMPS board - Power part It supplies the DC power to the main digital board based on AC 110~220V as an input. DVD board - DVD part It plays a disc and transmits the A/V data to the MPEG Decoder IC. 1-2 PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS IMPORTANT SAFETY NOTICE A.C. Voltmeter This manual was prepared for use only by properly trained audio-video service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs. 0.15uF Special components are also used to prevent x-radiation, shock and fire haz- Place this probe