Magnavox 19MDTR20 Service Manual

Also see for 19MDTR17: Features

Contents

1-3-4 T1102_SN2. Installation1. Using desoldering braid, remove the solder fromthe foil of each pin of the flat pack-IC on the CBAso you can install a replacement flat pack-IC moreeasily.2. The “●” mark on the flat pack-IC indicates pin 1.(See Fig. S-1-7.) Be sure this mark matches the 1on the PCB when positioning for installation. Thenpresolder the four corners of the flat pack-IC. (SeeFig. S-1-8.)3. Solder all pins of the flat pack-IC. Be sure thatnone of the pins have solder bridges.Instructions for Handling Semi-conductorsElectrostatic breakdown of the semi-conductors mayoccur due to a potential difference caused byelectrostatic charge during unpacking or repair work.1. Ground for Human BodyBe sure to wear a grounding band (1 MΩ) that isproperly grounded to remove any static electricity thatmay be charged on the body.2. Ground for WorkbenchBe sure to place a conductive sheet or copper platewith proper grounding (1 MΩ) on the workbench orother surface, where the semi-conductors are to beplaced. Because the static electricity charge onclothing will not escape through the body groundingband, be careful to avoid contacting semi-conductorswith your clothing.Example :Pin 1 of the Flat Pack-ICis indicated by a " " mark. Fig. S-1-7PresolderCBAFlat Pack-ICFig. S-1-8CBAGrounding BandConductive Sheet orCopper Plate1MΩ1MΩCBA