5
55PMA550/55HDM71 (PW1)
3. Service points
Lead free solder
This product uses lead free solder (unleaded) to help preserve the environment. Please read these instructions
before attempting any soldering work.
Caution:
Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead free
solder can splatter at high temperatures (600
˚
C).
Lead free solder indicator
Printed circuit boards using lead free solder are engraved with an "F."
Properties of lead free solder
The melting point of lead free solder is
approximately
40-50
˚
C higher than leaded solder.
Servicing solder
Solder with an alloy composition of
96.5
Sn
/
3.0Ag
/
0.5Cu or
99.3
Sn
/
0.7Cu is recommended.
Although servicing with leaded solder is possible, there are a few precautions that have to be taken. (Not taking
these precautions may cause the solder to not harden properly, and
cause
consequent malfunctions.)
Precautions when using leaded solder
Remove all lead free solder from soldered joints when replacing components.
If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly after the lead
free solder has been completely melted (do not apply the soldering iron without solder).
Servicing soldering iron
A soldering iron with a temperature setting capability (temperature control function) is recommended.
The melting point of lead free solder is higher than leaded solder. Use a soldering iron that maintains a high
stable temperature (large heat capacity), and that allows temperature adjustment according to the part being
serviced, to avoid poor servicing performance.
Recommended soldering iron:
Soldering iron with temperature control function (temperature range: 320-450
˚
C)
Recommended temperature range per part:
Part
Soldering iron temperature
Mounting (chips) on mounted PCB
320
˚
C±30
˚
C
Mounting (chips) on empty PCB
380
˚
C±30
˚
C
Chassis, metallic shield, etc.
420
˚
C±30
˚
C
FILTER PWB, SW PWB, LED/RECEIVER PWB, TACT SW PWB, SP TERMINAL(L/R) PWB
AUDIO PWB, JOINT PWB, SUB WOOFER PWB
VIDEO PWB
The PWB assembly which has used lead free solder
Summary of Contents for 55HDM71 - 55" Plasma Panel
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Page 41: ...55PMA550 55HDM71 41 ...
Page 47: ...47 55PMA550 55HDM71 10 Block diagram ...
Page 49: ...49 55PMA550 55HDM71 11 Connection diagram PW1 55V CONNECTION DIAGRAM ...
Page 50: ...50 55PMA550 55HDM71 12 Wiring diagram Wiring diagram 1 2 ...
Page 52: ...52 55PMA550 55HDM71 13 Disassembly diagram ...
Page 54: ...54 55PMA550 55HDM71 ...
Page 67: ...55P1 A BUS D2 PWB CND1 4 55P1 A BUS D1 PWB CND2 4 CND2 9 ...
Page 68: ...55P1 A BUS D4 PWB CND3 12 55P1 A BUS D3 PWB CND4 3 CND3 5 CND4 5 ...
Page 69: ...55P1 A BUS U2 PWB CNU1 4 55P1 A BUS U1 PWB CNU2 7 CNU2 4 ...
Page 70: ...55P1 A BUS U4 PWB CNU3 10 55P1 A BUS U3 PWB CNU4 5 CNU3 5 CNU4 3 ...
Page 71: ...55P1 LOGIC PWB CN9 ...
Page 72: ...CN23 55P1 X SUS PWB CN21 CN25 CN24 CN22 ...
Page 73: ...55P1 Y SUS PWB CN31 CN34 ...
Page 74: ...55PMA550 55HDM71 YK No 006E Digital Media Division QR60581 Printed in Japan JE ...