ND-G500/XS/E5
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1. SERVICE PRECAUTIONS
1.1 SERVICE PRECAUTIONS
1.2 NOTES ON SOLDERING
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
o
C.
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.
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.
Summary of Contents for ND-G500 - Amplifier
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Page 7: ...ND G500 XS E5 7 5 6 7 8 5 6 7 8 C D F A B E 2 2 CONNECTION DIAGRAM ...
Page 12: ...ND G500 XS E5 12 1 2 3 4 1 2 3 4 C D F A B E 9 2 EXTERIOR ND G500 XS E5 A A A ...
Page 16: ...ND G500 XS E5 16 1 2 3 4 1 2 3 4 C D F A B E A a A b A b A AMP UNIT ...
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