Sharp PN-T322B Service Manual - Page 4

LEAD-FREE SOLDER The PWB' s of this model employs lead-free solder. The "LF" marks indicated on the PWB's and the Service Manual mean "Lead-Free" solder. Thealphabet following the LF mark shows the kind of lead-free solder. Example: 5mm Lead-Free Solder composition code (Refer to the table at the right.) a Solder composition Sn-Ag-Cu Sn-Ag-Bi Sn-Ag-Bi-Cu Sn-Zn-Bi Sn-In-Ag-Bi Sn-Cu-Ni Sn-Ag-Sb Bi-Sn-Ag-P Bi-Sn-Ag Solder composition code a b z i n s p (1) NOTE FOR THE USE OF LEAD-FREE SOLDER THREAD When repairing a lead-free solder PWB, use lead-free solder thread. Never use conventional lead solder thread, which may cause a breakdown or anaccident. Since the melting point of lead-free solder thread is about 40˚C higher than that of conventional lead solder thread, the use of the exclusive-use solder-ing iron is recommendable. (2) NOTE FOR SOLDERING WORK Since the melting point of lead-free solder is about 220˚C, which is about 40˚C higher than that of conventional lead solder, and its soldering capacityis inferior to conventional one, it is apt to keep the soldering iron in contact with the PWB for longer time. This may cause land separation or mayexceed the heat-resistive temperature of components. Use enough care to separate the soldering iron from the PWB when completion of soldering isconfirmed. Since lead-free solder includes a greater quantity of tin, the iron tip may corrode easily. Turn ON/OFF the soldering iron power frequently. If different-kind solder remains on the soldering iron tip, it is melted together with lead-free solder. To avoid this, clean the soldering iron tip after com-pletion of soldering work. If the soldering iron tip is discolored black during soldering work, cleanand file the tip with steel wool or a fine filer. "CAUTION" RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS CAUTION DOUBLE POLE/NEUTRAL FUSING The battery supplied with this product contains traces of Lead. For EU: The crossed-out wheeled bin implies that used batteries should not be put to the general householdwaste! There is a separate collection system for used batteries, to allow proper treatment and recycling in accordance with legislation. Please contact your local authority for details on the collection and recycling schemes. For Switzerland: The used battery is to be returned to the selling point. For other non-EU countries: Please contact your local authority for correct method of disposal of the used battery. "BATTERY DISPOSAL" THIS PRODUCT CONTAINS A LITHIUM PRIMARY (MANGANESS DIOXIDE) MEMORY BACK-UP BATTERY THAT MUST BE DISPOSED OF PROPERLY. PLEASE CONTACT YOUR LOCAL SHARP DEALER OR AUTHORIZED SERVICE REPRESENTATIVE FOR ASSISTANCE IN DISPOSING OF THIS BATTERY. U.S.A.ANDCANADAONLY ii