6
VSX-LX52
1
2
3
4
A
B
C
D
E
F
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3
4
1. SERVICE PRECAUTIONS
1.1 NOTES ON SOLDERING
1.2 NOTES ON REPLACING
1.3 CAUTION
• For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit.
Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs
accompanied by reworking of soldering.
• Compared with conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 ºC.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 ºC in general, although
the temperature depends on the heat capacity of the PC board on which reworking is required and the weight of the tip of
the soldering iron.
Do NOT use a soldering iron whose tip temperature cannot be controlled.
Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting
temperatures (hard to melt/easy to harden).
The following lead-free solders are available as service parts:
• Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP1008 0.3 in dia.
The part listed below is difficult to replace as a discrete component part.
W
hen the part listed in the table is defective, replace whole Assy.
IC
8
00
EMMA2RL2
UPD612
8
3F1-407LU2A
BGA
IC1501
HDMI Receiver
SII9233ACTU
IC with heat-pad
DIGITAL MAI
N
ASSY
ASSY NAME
Ref No.
Part No.
Remarks
FUNCTION
PCB ASSY Part No.
Parts that is Diffcult to Replace
A
W
X9420
• Discharging
Please refer to page 52, “Preparations Before Perfoming Diagnosis of the PO
W
ER AMP Assy”.
• Ground Points
Please refer to page 53, “Ground Points”.
