Denon DVD-1740/558 Service Manual

7DVD-1740/558With Iron Wire:1. Using desoldering braid, remove the solder fromall pins of the flat pack-IC. When you use solderflux which is applied to all pins of the flat pack-IC,you can remove it easily. (Fig. S-1-3)2. Affix the wire to a workbench or solid mountingpoint, as shown in Fig. S-1-5.3. While heating the pins using a fine tip solderingiron or hot air blower, pull up the wire as the soldermelts so as to lift the IC leads from the CBAcontact pads as shown in Fig. S-1-5.4. Bottom of the flat pack-IC is fixed with glue to theCBA; when removing entire flat pack-IC, first applysoldering iron to center of the flat pack-IC and heatup. Then remove (glue will be melted). (Fig. S-1-6)5. Release the flat pack-IC from the CBA usingtweezers. (Fig. S-1-6)Note: When using a soldering iron, care must betaken to ensure that the flat pack-IC is notbeing held by glue. When the flat pack-IC isremoved from the CBA, handle it gentlybecause it may be damaged if force is applied.2. 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.To SolidMounting PointSoldering IronIron WireorHot Air BlowerFig. S-1-5Fine TipSoldering IronCBAFlat Pack-ICTweezersFig. S-1-6Example :Pin 1 of the Flat Pack-ICis indicated by a " " mark. Fig. S-1-7PresolderCBAFlat Pack-ICFig. S-1-8