2
DV-310-S
1
2
3
4
A
B
C
D
E
F
1
2
3
4
SAFETY INFORMATION
This service manual is intended for
q
ualified service technicians ; it is not meant for the casual
do-it-yourselfer. Qualified technicians have the necessary test e
q
uipment and tools, and have been
trainedto properly and safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may
void the warranty. If you are not
q
ualified to perform the repair of this product properly and safely,
you should not risk tryin
g
to do so and refer the repair to a
q
ualified service technician.
W
AR
N
I
N
G !
THE AEL (ACCESSIBLE EMISSIO
N
LE
V
EL) OF THE LASER PO
W
ER OUTPUT IS LESS THA
N
CLASS 1
BUT THE LASER COMPO
N
E
N
T IS CAPABLE OF EMITTI
N
G RADIATIO
N
EXCEEDI
N
G THE LIMIT FOR
CLASS 1.
A SPECIALLY I
N
STRUCTED PERSO
N
SHOULD DO SER
V
ICI
N
G OPERATIO
N
OF THE APPARATUS.
LASER DIODE CHARACTERISTICS
FOR D
V
D : MAXIMUM OUTPUT PO
W
ER : 5 m
W
W
A
V
ELE
N
GTH : 650 nm
FOR CD :
MAXIMUM OUTPUT PO
W
ER : 5 m
W
W
A
V
ELE
N
GTH : 7
8
0 nm
Additional Laser Caution
∗
: See page 26.
1.
• Laser diode is driving with Q2303,Q2305(650nm LD) and Q2302,
Q2304(7
8
0nm LD)on the D
V
D MT PCB Assy.
Therefore, when short-circuit between the emitter and collector of these
transistors or the base voltage is supplied for transistors turn on, the
laser oscillates. (failure mode)
• In the test mode
∗
, there is the mode that the laser oscillates except
for the disc judgment and playback. LD O
N
mode in the test mode
oscillates with the laser forcibly.
2.
W
hen the cover is open, close viewing through the objective lens with
the naked eye will cause exposure to the laser beam.
LABEL CHECK
(Printed on the Rear Panel)
Location: inside of the unit
OPE
N/C
LOS
E
HOM
E
MEN
U
RET
URN
ENT
ER
TOP
ME
NU
MEN
U
USB
DVD
/US
B
STA
NDB
Y/O
N
