Nakamichi CD Player 4 - General Information and Safety Precautions; Model Number and Destinations; Cautions and Warnings for Operation; Laser Pickup Handling Procedures

@ Laser Caution Label and Class 1 Laser Product Label (for EP)
=
CAUTION- INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED.
AVOID EXPOSURE TO BEAM.
VORSICHT! UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN DECKEL |
GEOFFNET UND WENN SICHERHEITSVERRIEGELUNG UBERBRUCKT IST.
NICHT DEM STRAHL AUSSETZEN!
VARNING— OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD OCH SPARR
AR URKOPPLAD. STRALEN AR FARLIG.
ADVARSEL- USYNLIG LASERSTRALING VED ABNING, NAR SIKKERHEDSAFBRYDERE
ER UDE AF FUNKTION. UNDGA UDSATTELSE FOR STRALING.
VAROITUS! LAITE SISALTAA LASERDIODIN, JOKA LAHETTAA NAKYMATONTA
CLASS 1
LASER PRODUCT
THIS COMPACT DISC PLAYER IS CLASSIFIED AS A
CLASS 1 LASER PRODUCT.
THE CLASS 1 LASER PRODUCT LABEL iS LOCATED
ON THE REAR EXTERIOR.
SILMILLE VAARALLISTA LASERSATEILYA.
1.4. Handling the Laser Pickup
In case of repair or replacement of the Laser Pickup, pay
attention to the following handling instructions since the
laser diode in the Laser Pickup is not resistant to static
electricity.
(1) Grounding
When you repair a Laser Pickup, first ground the
human body, as well as the measuring instruments
and other tools (with particular caution to soldering
iron). What’s more, your workbench and floor should
desirably be grounded using conductive sheet or
copper plate. See Fig. 1.1.
Note: Be careful so as not to let your clothes touch
the Laser Pickup, as static electricity on the
clothes will not be released even if your body
is grounded.
(NO GOOD)
Laser Pickup
(2)
(3)
(GOOD)
Fig. 1.1
Discharge of Electricity
Be sure to discharge electricity from objects brought
into contact with the Laser Pickup (i.e., soldering
iron, tweezers, probes, volt-ohm-meter probes, etc.)
before starting work by contacting them with the
Compact Dise Player’s chassis. Besides, never touch
the Laser Pickup while power is applied.
Soldering Iron to be Used
The soldering iron for use in repair work shoud be:
(1) a ceramic soldering iron, (2) a soldering iron with
its metal part grounded, or (8) a soldering iron whose
insulation resistance after five minutes of power
application is 10 M-ohm or more at 500 VDC.
Soldering should be completed promptly, at a
soldering iron temperature of 320° max (39 W). A
soldering iron heated above this temperature can
break down the laser diode.
Wrist-strap
for Grounding
8
Conductive Sheet
or Copper Plate