To Service Personnel - Yamaha YAS-408 Service Manual

YAS-408/YMS-4080/ATS-4080

■ TO SERVICE PERSONNEL

1. Critical Components Information
Components having special characteristics are marked ⚠ 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 ohms shunted
by 0.15 μF.
About lead free solder / 無鉛ハンダについて
All of the P.C.B.s installed in this unit and solder joints are
soldered using the lead free solder.
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:
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.
WARNING: Lithium batteries
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
WARNING:
Lithium batteries are dangerous because
they can be exploded by improper handling. Observe the
following precautions when handling or replacing lithium
batteries.
• Leave lithium battery replacement to qualified service
personnel.
• Always replace with batteries of the same type.
• When installing on the PC board by soldering, solder
using the connection terminals provided on the battery
cells. Never solder directly to the cells. Perform the
soldering as quickly as possible.
• Never reverse the battery polarities when installing.
• Do not short the batteries.
• Do not attempt to recharge these batteries.
• Do not disassemble the batteries.
• Never heat batteries or throw them into fire.
2
WALL EQUIPMENT
OUTLET UNDER TEST
INSULATING
TABLE
• Leakage current must not exceed 0.5mA.
• Be sure to test for leakage with the AC plug in both polarities.
本機に搭載されているすべての基板およびハンダ付けに
よる接合部は無鉛ハンダでハンダ付けされています。
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：
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。
注意
正しい電池と交換しないと爆発が起きるおそれがありま
す。
同一型名または同等品以外の電池とは絶対に交換しない
ようにしてください。
ADVARSEL!
Lithiumbatteri –Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri af samme fabrikat og
type. Levér det brugte batteri tilbage til leverandøren.
VARNING
Explosionsfara vid felaktigt batteribyte. Använd samma
batterityp eller an ekvivalent typ som rekommenderas
av apparattillverkaren. Kassera använt batteri enligt
fabrikantens instruktion.
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan
tyyppiin. Hävitä käytetty peristo valmistajan ohjeiden
mukaisesti.
AC LEAKAGE
TESTER OR
EQUIVALENT