Service Aids; Laser Product; Information About Lead.free Soldering - Philips CEM220/55 Service Manual

1-4
SERVICE AIDS
@
wARNTNG
All
lCs and many other semi-conductors are
susceptible
to electrostatic discharges
(ESD).
Careless
handling
during repair can reduce life
drastically.
When
repairing,
make sure that
you
are
connected with the same
potential
as the mass
of
the
set
via
a
wrist
wrap
with
resistance.
Keep
components and
tools also at this
potential.
Safety
regulations
require that the set be restored to its original
condition
and
that parts which are
identical with those specified,
be used
Safety components are marked by the symbolA.
ESD
)
IAT
INFORMATION ABOUT LEAD.FREE SOLDERING
Philips CE is producing lead-free sets
from
1
.1
.2005 onwards.
IDENTIFICATION:
Regardless of special logo (not always indicated) one must treat all sets from l-i-Jan7d6-d onwards, according next rules:
.
On our website
umw.atvourservice,ce.Philios.com
you find more information
to:
*
BGAde-/soldering (+ baking instructions)
*
Heating-profiles of BGAs and other lCs used in Philips-sets
*
Lead free
You will find this and more technical information within the "magazine', chapter'workshop
news".
For
additional questions please contact your local repair-helpdesk.
SERVICE INSTRUCTION
Safety regulations require that after a repair, the set must be retumed in
its
original condition. Pay in particular attention to
the following points:
.
Route the wire trees correctly and fix them with the
mounted cable clamps.
.
Check the insulation
of
the AC Power lead for external
damage.
.
Check the strain reliei of the AC Power cord
lor proper
lunction.
.
Check the electrical DC resistance between the AC Power
Plug and the secondary side (only for sets which have
a
AC
Power isolated power supply):
CLASS
1
LASER PRODUCT
1.
Unplug the AC Power cord and connect a wire
between the two pins ol the AC Power plug.
2.
Set the AC Power switch to the
"on'position (keep ths
AC Power cord unplugged!).
3.
Measure the resistance value between the pins ol the
AC Power plug and the metal shielding of the tuner
or
the aerial connection on the set.
The
reading should be
larger than 4.5 Mohm (For U.S.
it should be between
4.2 Mohm and 12 Mohm).
4.
Switch "off" the set, and remove the wire between the
two pins of the
AC
Power plug.
.
Check the cabinet lor defects, to avoid touching of any
inner parts by the customer.