Panasonic TX-42AS750E / TX-42ASW754 / TX-42ASR750 (serv.man2) Service Manual ▷ View online
About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.
This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work,
we’d suggest the use of Pb free solder as well, although Pb solder may be used.
PCBs manufactured using lead free solder will have the PbF within a leaf Symbol
stamped on the back of PCB.
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 and set it to 700 ± 20 °F (370 ± 10 °C).
higher. Please use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).
Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before
applying Pb solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before
applying Pb solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
After applying PbF solder to double layered boards, please check the component side for excess solder which may
flow onto the opposite side. (see Fig.3)
flow onto the opposite side. (see Fig.3)
Suggested Pb free solder
There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder.
However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used. (see Fig.4)
However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used. (see Fig.4)
Fig.3
Fig.4
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Service Navigation
Chassis Board Layout
Chassis Board Layout
Board Name
Function
A-Board
AV Terminal, HDMI, USB, WIFI, Digital Audio Out, TUNER-A+(T2+C+S) x2,
DVB-T2/T/S/C Dem, CI Slot , SD Slot , Peaks IC_LD6, Speaker out,
eMMc Memory, STM EEPROM, DDR SDRAM
P-Board
Main Input, Power Supply, LED DRIVER
K-Board
Remote Receiver, Power and Timer LED, C.A.T.S
GK-Board
Key control, Power switch
A-BOARD
K-BOARD
P-BOARD
GK-BOARD
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Service Hints
How to remove the backcover
Lay the main unit face down. (see Fig.5)
Remove the 4 fixing screws and the pedestal assembly. (see Fig.6)
Remove the 24 fixing screws and the backcover. (see Fig.7)
Fig.5
Fig.6
(1)
(1)
(1)
(1)
SCREWS
(1) THE5ZL002N /4pcs/
Fig.7
SCREWS
(2) THTD037J /16pcs/
(3) THEC1509 /8pcs/
(3) THEC1509 /8pcs/
(2)
(2)
(1)
(2)
(2)
(2)
(1)
(2)
(2)
(2)
(3)
(3)
(3)
(3)
(2)
(2)
(2)
(3)
(3)
(2)
(3)
(3)
(2)
(2)
(2)
(2)
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Applicable Signals
Note:
Signals other than above may not be displayed properly.
The above signals are reformatted for optimal viewing on your display.
Signal name
COMPONENT
HDMI
525 (480) / 60i,60p
*
*
625 (576) / 50i, 50p
*
*
750 (720) / 60p, 50p
*
*
1,125 (1,080) / 60i, 50i
*
*
1,125 (1,080) / 60p
*
1,125 (1,080) / 50p
*
1,125 (1,080) / 24p
*
Component (Y, Pb, Pr) (from AV2 terminal), HDMI
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