Panasonic TC-14RM10LP, Service Manual

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TC-14RM10LP/ TC-20RM10LP/ TC-20RA10LP
ABOUT 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 that
contains 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 repair
work 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 with
temperature control and adjust it to 700° ± 20° F, (370° ± 10°C).In case of using high temperature soldering iron, please be
careful 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 possible
and 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 the
opposite side (See figure, below).
SUGGESTED PbF SOLDER
There 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 manufac
turer’s specific instructions for the melting points of their products and any precautions for using their product with other
materials.
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 USED
P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.) Pb Free is not used the Power Supply Board of this
unit.
(Example : Digital Board)
CN612
1 8
E
L659
L661 L660
IC605
R70
L619 L618
C667
R708
L630
R611
F605
R736
L620
L621
R723
R613
R610
C717 C731
C694
L655
L643
L604 L606 L605
R767 R769 R768 L656 L657
S
CH
Q609
75
51
50
26 25
1
76
100
C738
C668
RA610
RA609
D602
J600
8
1
9
IC610
Q613
C726
D607
D608
R737
E Q620
16
L624
L625
L626
L658
L653
L654
L642
C666
BAT600
PFUP1330YA PbF
RA602
C672
C728
+24V
+3.3V/BAT
25
DIGITAL BOARD COMPONENT VIEW
Marked