Service Precautions; Notes On Soldering; Notes On Replacing Parts; Service Notice - Pioneer VSX-321-K-P Service Manual

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1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

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• 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
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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.
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1.2 NOTES ON REPLACING PARTS

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.
Assy Name
D
D-MAIN Assy
D-MAIN Assy
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1.3 SERVICE NOTICE

• Discharging
For more detail, please refer to "7. DISASSEMBLY - 1. Discharging".
• Notes on Ground Points Connection
For more detail, please refer to "7. DISASSEMBLY - 2. Notes on Disassembly and Assembly - Confirmation of GND Wire".
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Ref No. Function
IC102 Audio DSP System IC
IC601 IC, LOGIC-D/A Converter
HTP-071
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Parts that is Difficult to Replace
Part No.
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Remarks
IC with heat-pad
IC with heat-pad
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