Service Precautions; サービス時の注意事項 - Yamaha MX-D1 Service Manual

MX-D1
I SERVICE PRECAUTIONS /
1. Safety measures
• Some internal parts in this product contain high voltages
and are dangerous. Be sure to take safety measures
during servicing, such as wearing insulating gloves.
• Note that C196, C197, C198, C199, C222 and C223
are dangerous even after the power is turned off because
an electric charge remains and a high voltage continues
to exist there.
Before starting the service work, connect discharging
resistors (5 k-ohms/10 W) to the terminals indicated in
the figure below to discharge electricity. The time
required for discharging is about 30 seconds. (at 4
locations for Lch and Rch, each)
MAIN P.C.B.
5 k-ohms
10W
5 k-ohms
10W
5 k-ohms
10W
8
サービス時の注意事項
IC129
C217
TP304
C223
TP303
TP302
R272
C222
C196
TP301
C191
D134
D135
D137
1. 安全対策
・ この製品の内部には高電圧部分があり危険です。修理の際は、
絶縁性の手袋を使用するなどの安全対策を行ってください。
・ C196、C197、C198、C199、C222、C223には電源
をOFFにした後も電荷が残り、高電圧が維持されており危険で
す。
修理作業前に放電用抵抗 （5kΩ/10W） を下記の端子間に接続
して放電してください。放電所用時間は約3 0 秒間です。
（Lch、Rchに各4箇所あります。）
C199
T101
C197
C198
C190
D139
D138
D136
5 k-ohms
10W