PT-TW371R (serv.man3) — Panasonic Projector Service Manual (repair manual). Page 2

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  About lead free solder (PbF)
This projector is using the P.C.Board which applies lead free solder.
Use lead free solder in servicing from the standpoint of antipollution for the global environment.
•  Lead free solder: Sn-Ag-Cu (tin, silver and copper) has a higher melting point (approx. 217°C) than standard solder Typically  
  the melting point is 30~40 °C higher. When servicing, use a high temperature soldering iron with temperature limitation 
  function and set it to 370 ± 10 °C.
•  Be precautious about lead free solder. Sn-Ag-Cu (tin, silver and copper) will tend to splash when heated too high (approx. 
  600°C or higher).
•  Use lead free solder for the P.C.Board (specified on it as “PbF”) which uses lead free solder. (When you unavoidably use 
   lead solder, use lead solder after removing lead free solder. Or be sure to heat the lead free solder until it melts completely, 
   before applying lead solder.)
•  After solder to double layered P.C.Boards, check the component side for excess solder which may flow onto the opposite side.
About the identification of the lead free solder P.C.Board.
 For the P.C.Board which applies lead free solder, the symbol as shown in the figure below is printed or stamped on the surface 
or the back of P.C.Board.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. 
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment 
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause 
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. 
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off 
and on, the user is encouraged to try to correct the interference by one of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/BD technician for help.
The user may find the booklet “Something About Interference” available from FCC local regional offices helpful.
FCC Warning:
To assure continued FCC emission limit compliance, follow the attached installation instructions. This includes using the provided power 
cord and shielded interface cables when connecting to computer or peripheral devices. Also, any unauthorized changes or modifications 
to this equipment could void the user’s authority to operate this device.
Any unauthorized changes or modifications to this equipment will void the user’s authority to operate this device.
There are special components used in this equipment which are important for safety. These parts are marked by 7 in the schematic 
diagram, circuit board diagrams, exploded views and replacement parts list. It is essential that these critical parts should be replaced 
with manufacturer’s specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of 
The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this service manual.
Le technicien d'entretien doit lire et suivre les «Précautions de sécurité» et «Avis important de sécurité» dans ce manuel d'entretien.
This service information is designed for experienced repair technicians only and is not designed for used by the general  
public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a 
product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt 
to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or 
Ce document d'entretien est destiné aux techniciens d'entretien expérimentés uniquement et n'est pas conçu pour une utilisation 
par le grand public. Il ne contient pas des avertissements ou des mises en garde pour aviser les non-techniciens des dangers 
potentiels lorsqu'ils tentent de réparer un produit. Les appareils alimentés par l'électricité doivent être révisés ou réparés unique-
ment par des techniciens professionnels expérimentés. Toute tentative d'entretenir ou de réparer le ou les produits traités dans ce 
document d'entretien par autrui peut entraîner des blessures graves ou la mort.
  WARNING : Use UV Radiation eye and skin protection during servicing.
   AVERTISSEMENT : Utilisez UV lumière oeil dioprotection et la protection de la peau lors de l'entretien.
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