To Service Personnel - Yamaha YST-SW225 Service Manual

YST-SW225
I TO SERVICE PERSONNEL
1. Critical Components Information
Components having special characteristics are marked s
and must be replaced with parts having specifications equal
to those originally installed.
2. Leakage Current Measurement (For 120V Models Only)
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.
Meter impedance should be equivalent to 1500 ohm shunted
G
by 0.15µF.
"CAUTION"
"F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE."
CAUTION
F1: REPLACE WITH SAME TYPE 4A, 125V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 4A, 125V.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the manufacturing process except soldering of the P.C.B. ass'y contains LEAD. In addition, other
electrical/electronic and /or plastic (where applicable) components may also contain traces of chemicals found by the
California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive
harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA-
SON WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose
eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before
handling food.
About Lead Free Solder / 無鉛ハンダについて
All P.C.B.s used for this product are soldered with lead
free soldering material which is an alloy of Sn+Ag+Cu (tin
+ silver + copper).
Among some types of lead free solder currently available,
it is recommended to use one of the following types for the
repair work.
• Sn + Ag + Cu (tin + silver + copper)
• Sn + Cu (tin + copper)
• Sn + Zn + Bi (tin + zinc + bismuth)
Caution:
1. As the melting point temperature of the lead free solder
is about 30°C to 40°C (50°F to 70°F) higher than that of
the lead solder, be sure to use a soldering iron suitable
to each solder.
2. If lead solder must be used, be sure to remove lead free
solder from each terminal section of the parts to be
replaced and from the area around it completely before
soldering, or make sure that the lead free solder and
lead solder melt together fully.
2
WALL EQUIPMENT
OUTLET UNDER TEST
INSULATING
TABLE
Leakage current must not exceed 0.5mA.
G
G Be sure to test for leakage with the AC plug in both polarities.
この製品に使用されているすべての基板のハンダ付けに
は、Sn+Ag+Cu （ 錫+銀+銅） の合金である無鉛ハンダが使用
されています。
無鉛ハンダにはいくつかの種類がありますが、修理時には
下記のような無鉛ハンダの使用を推奨します。
・Sn+Ag+Cu （ 錫+銀+銅）
・Sn+Cu （ 錫+銅）
・Sn+Zn+Bi （錫+亜鉛+ビスマス）
注意：
① 無鉛ハンダの融点温度は通常の鉛入りハンダに比べ30
∼40℃程度高くなっていますので、それぞれのハンダ
に合ったハンダごてをご使用ください。
② 鉛入りハンダを使わざるを得ない場合は、あらかじめ交
換する部品端子部やその周辺部の無鉛ハンダをすべて取
り除くか、あるいは無鉛ハンダと鉛入りハンダが十分に
溶けた状態となるようにハンダ付けしてください。
AC LEAKAGE
TESTER OR
EQUIVALENT