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1. SERVICE PRECAUTIONS
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1.1 NOTES ON SOLDERING
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.
1.2 SERVICE PRECAUTIONS
• Be careful not to scratch or stain the cabinet during servicing, because it may cause a serious complaint.
• As the product weighs 90 kg, be fully careful when handling it. Four people are required when moving it.
• Be careful of the order of wire arrangement at a place where several wires are fixed together with a screw (on the power
main electrolytic capacitor, etc.), as this can affect the sound quality.
Follow the detailed procedure described in "7. DISASSEMBLY" .
• As the product has conical feet, be very careful not to scratch floor surfaces in the customer' s home.
• Leads of power transistors supplied as service parts are NOT bent like ones used on the product.
Bend leads of supplied parts as shown the rough indication below before using.
TE
L 13942296513
1.3 FOR JIG
Jig for the Product (Recommended Sizes) and How to Use the Jig
Top
10 cm
www
.
Approx. 22 cm apart
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6
40 cm
8 cm
Jig
Top
x
ao
u163
y
i
As the jig holds the transformer
and heatsink in place, align it with those parts.
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7
2 9
8
5.8 mm 8.5 mm
7.2 mm
Power transistor
Q Q
3
6 7
1 3
1 5
View of the product held
in place by the jig
co
.
TAD-M600
7
8
9 4
2 8
0 5
8
2 9
9 4
2 8
m
8
9 9
A
B
C
9 9
D
E
F
Jig
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