Sharp DV-SL90UM Service Manual - Page 7

(4) Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (5) Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6) Note: When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied. Hot Air Blower 2. Installation (1) Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily. (2) The " " mark on the flat pack-IC indicates pin 1. (See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. S1-8.) (3) Solder all pins of the flat pack-IC. Be sure that none of the pins have solder bridges. Example : To Solid Mounting Point or Iron Wire Soldering Iron Fig. S-1-5 Pin 1 of the Flat Pack-IC is indicated by a " " mark. Presolder Fig. S-1-7 CBA Fine Tip Soldeing Iron Tweezers Flat Pack-IC Fig. S-1-6 CBA Flat Pack-IC Fig. S-1-8 1-4-3 DVD_NOTE2