Pioneer ND-G500XS Service-Handbuch - Seite 5

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1. SERVICE PRECAUTIONS

1.1 SERVICE PRECAUTIONS

1. You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and should

keep the safety during servicing by following the safety instructions described in this manual.

2. Be careful in handling ICs. Some ICs such as MOS type are so fragile that they can be damaged by electrostatic

induction.

3. The area where the temperature gets high as a completely assembled product is the heat sink.

As a unit, on the other hand, sub-heat sink and the periphery of the sub-heat sink are the areas where the temperature

gets high.

4. Approximately one hour after activating, the temperature on part of outer surface reaches nearly 70

Therefore, be careful not to get burn, immediately after turning off power.

5. Watch out for a hot heat sink.

Operations while removing a heat sink can cause failure.

6. As a heat sink (approx. 250 g to 300 g) is heavy comparing with the product weight (approx. 900 g).

Keep a balance when taking out the board.

1.2 NOTES ON SOLDERING

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 C.

Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 C 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.

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.

ND-G500/XS/E5