Sharp DV-S2U Service Manual - Page 6

STANDARD NOTES FOR SERVICING Circuit Board Indications a. The output pin of the 3 pin Regulator ICs is indicated as shown. Top View Input Out In Bottom View How to Remove / Install Flat Pack-IC 1. Removal With Hot-Air Flat Pack-IC Desoldering Machine: (1) Prepare the hot-air flat pack-IC desoldering ma- chine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1) b. For other ICs, pin 1 and every fifth pin are indicated as shown. 5 Pin 1 10 c. The 1st pin of every male connector is indicated as shown. Pin 1 Instructions for Connectors 1. When you connect or disconnect the FFC (Flexible Foil Connector) cable, be sure to first disconnect the AC cord. 2. FFC (Flexible Foil Connector) cable should be inserted parallel into the connector, not at an angle. FFC Cable Connector CBA Fig. S-1-1 (2) Remove the flat pack-IC with tweezers while applying the hot air. (3) 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) (4) Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6) Caution: 1. Do not supply hot air to the chip parts around the flat pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protect other parts from damage. (Fig. S-1-2) 2. The flat pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it. CBA Hot-air Flat Pack-IC Desoldering Machine * Be careful to avoid a short circuit. 1-4-1 Masking Tape Tweezers Flat Pack-IC Fig. S-1-2 DVD_NOTE