Clarion DRB3375V - Page 8

procedures other than those specified herein may
~ result in hazardous radiation exposure.Do not look
into the optical lens at anytime.
6.Precautions for servicing the CD player
6-1.When replacing the pickup unit,take a countermea-
sure for electrostatic destruction(protection with a
short pin,etc.)to be careful in handling. |
6-2:When disassembling,be sure to turn off the
power.Disconnecting a connector during power-on
may destroy the internal IC.
7.Precautions for handling the pickup
7-1.Destruction due to surge current or static electricity
If a large current flows to the LD even for a very
short period,deterioration is promoted by a strong
light emitted by itself,or it is destroyed.See to it that
the LD drive circuit will not be exposed to a surge
current caused by a switch and others.If you handle
it carelessly,it will be destroyed instantaneously by
Static electricity applied form a human body.The
terminals of the LD have been shorted in order to
protect them against electrostatic destruction caused
by transportation upon shipment.To make safety
doubly sure,earth a human body,instruments,and
jigs without fail when installing.!t is recommended
to spread a ground mat on a work bench or the floor
for grounding.To open the shorted parts,use a sol-
dering iron after inserting a connector.Use the sol-
dering iron whose metallic part is earthed or whose
insulation resistance is 10M ohm or more(500C DC)
in Sminutes after turning on the power,and whose
temperature at its tip is 320°C or less(30W),,and work |
quickly.Depending on mechanism,when rmoving the :
flexible P.W.B.,short it.
7-2.2-axis block
Actuator
The actuator has a powerful magnetic circuit.If a.
magnetic substance is put close to it.its character-
istics will change.Also see to it that no foreign substances
will enter through the clearance of the cover.
Cleaning the lens
Adherence of dust to the objective reduces performance.To
clean the lens,apply a small amount of isopropylaicohol
to lens paper and wipe the lens gently.
7-3.Handling
a)When handling the pickup drive unit,hold the resin
mold chassis.
b)Note that if the circuitry of the printed circuit board
is directly touched by a hand or other substances,the
LD may be deteriorated.
c)lf you directly touch the pins of the flexible con-
nector with hand,the LD will be deteriorated.When
removing the mechanism from the set,be fully careful
in handling.
Mi DURING REPAIR OR INSPECTION,OBSERVE THE FOLLOWING.
1.Use specified parts.
The system uses parts with special safety charac-
teristics against flame and voltage.Use only parts
with equivalent characteristics when replacing them.
2.Place the parts and wiring back in their original positions
after replacement or re-wiring.
For proper circuit construction,use of insulation
tubes,bonding,gaps to P.W.B. etc.is involved. The
wiring connection and routing to the P.W.B. are
specially devised using clamps to keep away from
heated and high-voltage parts.So,make sure to replace
them back in their original positions after repair or
inspection.
3.Check for safety after repair.
Check that the screws,parts,and wires are put back
securely in their original position after repair.And
make sure for safety reasons there is no possibility
of secondary ploblems around the repaired spots.
4.Cautions regarding chips. _
Do not reuse removed chips even when no abnor-
mality is observed in their appearance.Always re-
place them with new ones.(The chip parts include
resistors,condensers, diodes, transistors, etc.). The negative
pole of tantalum condensers is highly susceptible to
heat,so use special care when replacing them,and
check operation afterward.
li ERROR DISPLAY
5.Cautions in handling flexible P.W.B.
Before working with a soldering iron,make sure that
the iron tip temperature is around 270°C .Take care
not to apply the iron tip repeatedly({more than 3 times)
to the same patterns.Also take care not to apply the
tip with force.
won DRBIZ75V cistion
wm ORB4275E ciation
12¥ © GROUND
183-279kHx
531-1602kHz
FM (UK) 87.5-108MHz 87.5-108MHz
cE
CLASS 1 LASER PRODUCT
(EN-60825, 1991)
CLASS 1 LASER PRODUCT
(EN-60825. 1991}
pened
Bottom View of
Main Unit
Top View of
Main Unit
CAUTION — OvVrSA E LARS RADIATION Wate Orb AnD
WTERLOCES ‘ces bere TED entena
To
protect
the
system,this
unit
has
been
equipped
with
self
diagnostic
functions.if
a
fault
arises,a
warning
is
issued
by various error displays.Follow the corrective measure and remove the fault.
Corrective measure
This
error
display
indicates
that
a
fault
has
arisen
in
the
mechanism
of
the
main
unit
_
(for example,the disc cannot be changed or ejected).—Check the main unit.
Error display
Er2-
Er3
DRB3275V
NRRADOTEE
This
error
display
indicates
that
the
pickup
focus
is
off
because
of
a
scratched
disc
or
some
other
factor
during
the
main
unit
play.—Check
the
compact
disc.
a i Oe Sa a NT AP Sa Fe EER SCE Ne A TON ME FEES AEE ee Ey ee ee