Denon DVD-2500BT Service Manual

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Denon DVD-2500BT Service Manual Manual pdf 9 page image

9DVD-2500BTSTANDARD NOTES FOR SERVICINGCircuit Board Indications1. The output pin of the 3 pin Regulator ICs isindicated as shown.2. For other ICs, pin 1 and every fifth pin areindicated as shown.3. The 1st pin of every male connector is indicated asshown.Instructions for Connectors1. When you connect or disconnect the FFC (FlexibleFoil Connector) cable, be sure to first disconnectthe AC cord.2. FFC (Flexible Foil Connector) cable should beinserted parallel into the connector, not at anangle.Pb (Lead) Free SolderWhen soldering, be sure to use the Pb free solder.How to Remove / Install Flat Pack-IC1. RemovalWith Hot-Air Flat Pack-IC Desoldering Machine:1. Prepare the hot-air flat pack-IC desolderingmachine, then apply hot air to the Flat Pack-IC(about 5 to 6 seconds). (Fig. S-1-1)2. Remove the flat pack-IC with tweezers whileapplying the hot air.3. 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)4. Release the flat pack-IC from the CBA usingtweezers. (Fig. S-1-6)CAUTION:1. The Flat Pack-IC shape may differ by models. Usean appropriate hot-air flat pack-IC desolderingmachine, whose shape matches that of the FlatPack-IC.2. Do not supply hot air to the chip parts around theflat pack-IC for over 6 seconds because damageto the chip parts may occur. Put masking tapearound the flat pack-IC to protect other parts fromdamage. (Fig. S-1-2)Top ViewOut InBottom ViewInput510Pin 1Pin 1FFC CableConnectorCBA* Be careful to avoid a short circuit.Fig. S-1-1