42″LCD TV Haier LT42A11ServiceServiceServiceTable of ContentsDescription Page Description PageSAFETY NOTICEANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSISAND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICINGELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING6.2 Power Board…..…………..…………..…..…….......336.3 Key Board………………………..……...……….......376.4 IR Board…………………………..….…….…….......377.Adjustment................................................................388.Block Diagram.……..................................................399.Wiring Diagram.…….................................................4010.Schematic Diagram……..……..……….……….......4110.1 Main Board………….…………………....…..........4110.2 Power Board………..…..…………...……….........5510.3 Key Board…………….………….……………........6110.4 IR Board………..………………….……….............6210.Exploded View…………………….………….….......6311.BOM List……………….…………….……………......65Table of Contents........……...................................…........1Important Safety Notice.......................................……......2Revision List………………………………………………....31. General Specifications...............................………........42. Operating Instructions…………………….……...….......62.1 The Use of Remote Control…….…………...…….......62.2 To Use the Menus...……………………….……….......72.3 How to Connect……..…………………….………......162.4 Front Panel Control Knobs……………….………......173.Input/Output Specification…………....................……..184.Mechanical Instructions……………………..................225.Repair Flow Chart ……………………….…….……......256.PCB Layout ………………..………………....…...........316.1 Main Board………………..……………......…..…......31