Pioneer SC-LX72, Service Manual

Page: 6 / 236

6
SC-LX82
1 2 3 4
A
B
C
D
E
F
1 2 3 4
1. SERVICE PRECAUTIONS
1.1 NOTES ON SOLDERING
1.2 NOTES ON REPLACING PARTS
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.
When the part listed in the table is defective, replace whole Assy.
IC800 EMMA2RL2 UPD61283F1-407LU2A BGA
IC1501 HDMI Receiver SII9233ACTU IC with heat-pad
DIGITAL MAIN
ASSY
ASSY NAME
Ref No. Part No. Remarks FUNCTION
PCB ASSY Part No.
Parts that is Difficult to Replace
AWX9498
• Discharging
Before starting the diagnosis, wait for three minutes until the electricity of the unit is discharged.
• Ground Points
Please refer to page 62, “Ground Points”.