LG service free download

File name service.pdf

Internal Use Only Website http://biz.lgservice.com SERVICE MANUAL MICRO HI-FI SYSTEM SERVICE MANUAL MODEL: CM2540 MODEL: CM2540 CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. P/NO : AFN76932794 JANUARY, 2015 CONTENTS SECTION 1 ... GENERAL SECTION 2 ... CABINET & MAIN CHASSIS SECTION 3 ... ELECTRICAL SECTION 4 ... REPLACEMENT PARTS LIST 1-1 SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS ... 1-3 ESD PRECAUTIONS ... 1-5 OPTION & HIDDEN KEY ... 1-6 1. HOW TO CHECK S/W VERSION NUMBER? 2. HOW TO MAKE A SYSTEM RESET? 3. HOW TO SET THE SYSTEM OPTION? 4. HOW TO SET THE DOOR LOCK OPTION? 5. HOW TO UPGRADE MAIN AND SUB MCU FIRMWARE? SPECIFICATIONS ... 1-8 1-2 SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2. Repair notes 1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point