4 How to replace the Lithium BatteryREPLACEMENT PROCEDURE1. Remove the Top case and DVD-RAM drive unit with Main P.C.B. by referring the Disassembling Procedure.2. Unsolder the Lithium Batteries: B7751 and then replace it into new one.( As shown in 23.2.3. The Main P.C.B. )NOTE:The lithium battery is a critical component. ( Type No.: CR2354-1GUF Manufactured by Panasonic. )It must never be subjected to excessive heat or discharge.It must therefore only be fitted in equipment designed specifically for its use.Replacement batteries must be of the same type and manufacture.They must be fitted in the same manner and location as the original battery, with the correct polarity contacts observed.Do not attempt to re-charge the old battery or re-use it for any other purpose.It should be disposed of in waste products destined for burial rather than incineration.5 Handling the Lead-free Solder5.1. About lead free solder (PbF)Distinction of PbF P.C.B.:P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.Caution:···· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher.Please use a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ±20°F (370 ± 10°C).···· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).···· When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heatthe soldering points with the Pb free solder until it melts enough.8DMR-E75VP
