Yamaha DVX-S301 Service Manual Download

Page: 2 / 68

DVR-S300/

NX-P301/NX-P302

DVR-S300

NX-P301/NX-P302

WALL
OUTLET

EQUIPMENT
UNDER TEST

AC LEAKAGE
TESTER OR
EQUIVALENT

INSULATING
TABLE

■

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

●

Leakage current must not exceed 0.5mA.

●

Be sure to test for leakage with the AC plug in both polarities.

WARNING: Laser Safety

This product contains a laser beam component. This
component may emit invisible, as well as visible radiation,
which may cause eye damage. To protect your eyes
and skin from laser radiation, the following precautions
must be used during servicing of the unit.

1) When testing and/or repairing any component within

the product, keep your eyes and skin more than 30 cm
away from the laser pick-up unit at all times. Do not
stare at the laser beam at any time.

2) Do not attempt to readjust, disassemble or repair the

laser pick-up, unless noted elsewhere in this manual.

3) CAUTION : Use of controls, adjustments or perfor-

mance of procedures other than those specified herein
may result in hazardous radiation exposure.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product 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
REASON 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.

Laser Emitting conditions:

1) When the Top Cover is removed, and the STANDBY/

ON SW is turned to the "ON" position, the laser
component will emit a beam for several seconds to
detect if a disc is present. During this time (5-10 sec.)
the laser may radiate through the lens of the laser pick-
up unit. Do not attempt any servicing during this period!
If no disc is detected, the laser will stop emitting the
beam. When a disc is loaded, you will not be exposed
to any laser emissions.

2) The laser power level can be adjusted with the VR on

the pick-up PWB, however, this level has been set by
the factory prior to shipping from the factory. Do not
adjust this laser level control unless instruction is
provided elsewhere in this manual. Adjustment of this
control can increase the laser emission level from the
device.

警告：レーザーの安全対策

本機はレーザー光線を放射する部品を搭載しています。こ
の部品が放射するレーザー光線は目に損傷を起こします。
このレーザー光線から目及び肌を保護するために、本機の
修理作業中は下記の注意を厳守してください。

1）テスト時または修理時、目及び肌を光ピックアップか

ら30cｍ以上離してください。いかなる場合もレーザー
光線を見つめないでください。

2）光ピックアップの再調整及び分解はしないでくださ

い。

3）このマニュアル上で指定されている以外の制御、調

整、手順はレーザー光線を照射される結果を招く恐れ
があります。

レーザー放射条件

1）トップカバーを取り外しSTANDBY/ONスイッチをON

にすると、ディスク検知のため5〜10秒間、光ピック
アップからレーザー光線が放射されます。この間、修
理はしないでください。
ディスクが検知されなければ、レーザー光線の放射は
停止します。ディスクがセットされている場合、ディ
スクで遮られるのでレーザー光線は修理担当者に届き
ません。

2）レーザーパワーレベルは光ピックアップ基板上のVRに