Samsung Electronics
1-3
1-3 Precautions for Electrostatically Sensitive Devices (ESDs)
1. Some semiconductor ("solid state") devices
are easily damaged by static electricity.
Such components are called Electrostatically
Sensitive Devices (ESDs. Examples include
integrated circuits and some field-effect
transistors. The following techniques will
reduce the occurrence of component
damage caused by static electricity.
2. Immediately before handling any
semiconductor components or assemblies,
drain the electrostatic charge from your
body by touching a known earth ground.
Alternatively, wear a discharging
wrist-strap device. (Be sure to remove it
prior to applying power--this is an electric
shock precaution.)
3. After removing an ESD-equipped assembly,
place it on a conductive surface such as
aluminum foil to prevent accumulation of
electrostatic charge.
4. Do not use freon-propelled chemicals.
These can generate electrical charges that
damage ESDs.
5. Use only a grounded-tip soldering iron
when soldering or unsoldering ESDs.
6. Use only an anti-static solder removal
device. Many solder removal devices are
not rated as "anti-static" (these can
accumulate sufficient electrical charge to
damage ESDs).
7. Do not remove a replacement ESD from its
protective package until you are ready to
install it. Most replacement ESDs are
packaged with leads that are electrically
shorted together by conductive foam,
aluminum foil or other conductive
materials.
8. Immediately before removing the protective
material from the leads of a replacement
ESD, touch the protective material to the
chassis or circuit assembly into which the
device will be installed.
9. Minimize body motions when handling
unpackaged replacement ESDs. Motions
such as brushing clothes together, or lifting
a foot from a carpeted floor can generate
enough static electricity to damage an ESD.
1-4 Special Precautions and Warning Labels for Laser Products
This Product Complies with
DHHS Rules 21CFR, Sub
chapter J.At date of Manu-
facture
CERTIFIED ONLY TO CANADIAN
ELECTRICAL CODE.
CERTIFIE EN VERTU DU CODE
CANADIAN DE LELETRICITE
SEULEMENT
CAUTION
:
INVISIBLE LASER RADIATION WHEN OPEN
AND INTERLOCKS DEFEATEO AVOIDEXPOSURE TO BEAM
ADVARSEL
: USYNLIG LASERSTRÅLING VED ABNING
NÅR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION
UNDGA UDSAETTELSE FOR STRALING
VARO
:AVATTAESSA JA SUOJALUKITUS OHITETTAESSA
OLET ALTTINA NAKYMATTÖMALLE LASERSATEILYLLE ALA
KATSO SATEESEEN!
VARNING
:OSYNLIG LASERSTRÅLNING NAR DENNA DEL
AR OPPNAD OCH SPARREN AR URKOPPLAD BETRAKTA
EJSTRÅLEN!
UL : Manufactured for U.S.A. Market.
CSA : Manufactured for Canadian Market.
EU
: Manufactured for European Market.
SCAN : Manufactured for Scandinavian
Market.
(UL)
(SCAN)
(CSA)
Fig. 1-3 Warning Labels (Location: Enclosure Block)
Fig. 1-4 Warning Labels (Location: Disc Clamper, Inner Side of Unit Door or Nearby Unit Chassis )
(EU)
CLASS 1
LASER PRODUCT
(EU)
Precautions
Summary of Contents for DV7720KV
Page 21: ...Samsung Electronics 5 2 5 1 Adjustment Point Location Alignment and Adjustment ...
Page 150: ...Samsung Electronics 8 1 8 Block Diagram ...
Page 151: ...Samsung Electronics 9 1 9 PCB Diagram 9 1 Front Top DV7720KV ...
Page 152: ...Samsung Electronics 9 2 PCB Diagram 9 2 Front Top DV4720KV ...
Page 153: ...Samsung Electronics 9 3 PCB Diagram 9 3 Video cd 9 4 1 Top view 9 4 2 Bottom view ...
Page 154: ...Samsung Electronics 9 4 PCB Diagram 9 3 Main ...
Page 155: ...Samsung Electronics 9 5 PCB Diagram ...
Page 156: ...Samsung Electronics 9 6 PCB Diagram 9 5 Power ...
Page 157: ...Samsung Electronics 9 7 PCB Diagram 9 6 Deck ...
Page 158: ...Samsung Electronics 9 8 PCB Diagram 9 7 Deck 9 8 Deck ...
Page 159: ...Samsung Electronics 10 1 10 Wiring Diagram Fig 10 1 Wiring Diagram DV7720KV DV4720V ...
Page 160: ...Samsung Electronics 10 2 Wiring Diagrams Fig 10 2 Wiring Diagram DV7700KV DV4700V ...
Page 161: ...Samsung Electronics 11 1 Schematic Diagrams 11 Schematic Diagram 11 1 Front ...
Page 162: ...Samsung Electronics 11 2 Schematic Diagrams 11 2 Main 1 4 Servo Section ...
Page 163: ...Samsung Electronics 11 3 Schematic Diagrams 11 3 Main 2 4 LD Video Section ...
Page 164: ...Samsung Electronics 11 4 Schematic Diagrams 11 4 Main 3 4 Audio Section ...
Page 165: ...Samsung Electronics 11 5 Schematic Diagrams 11 5 Main 4 4 Syscon Section ...
Page 166: ...Schematic Diagrams 11 Ð 6 Samsung Electronics 11 6 Video CD ...
Page 167: ...Samsung Electronics 11 7 Schematic Diagrams 11 8 Power DV 7620KV DV 7622KV ...