Panasonic TC-20KL05P Service Manual

Contents

Panasonic TC-20KL05P Service Manual Manual pdf 3 page image

- 3 -TC-20KL05PABOUT LEAD FREE SOLDER (PbF)Note:In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder thatcontains lead.We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),Silver, (Ag), and Copper, (Cu).This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repairwork we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.Caution• PbF solder has a melting point that is 50° ~ 70° F, (30° ~ 40°C) higher than Pb solder. Please use a soldering iron withtemperature control and adjust it to 700° ± 20° F, (370° ± 10°C).In case of using high temperature soldering iron, please becareful not to heat too long.• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).• If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possibleand be sure that any remaining is melted prior to applying the Pb solder.• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto theopposite side (See figure, below).SUGGESTED PbF SOLDERThere are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufacturer’s specific instructions for the melting points of their products and any precautions for using their product with othermaterials.The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.HOW TO RECOGNIZE THAT PB FREE SOLDER IS USEDP.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.) Pb Free is not used the Power Supply Board of thisunit.(Example : Digital Board)CN61218EL659L661L660IC605R70L619L618C667R708 L630R611F605 R736L620L621 R723R613R610C717C731C694L655L643L604L606L605R767R769R768L656L657SCHQ6097551502625176100C738C668RA610RA609D602J600819IC610Q613C726D607D608R737E Q62016L624L625L626L658L653L654L642C666BAT600PFUP1330YA PbFRA602C672C728+24V+3.3V/BAT25DIGITAL BOARD COMPONENT VIEWMarked