Philips PM3208 - 6 Dismantling the Instrument; 6.1 General Information; 6.2 Removing the Top- and Bottom Covers

6
DISMANTLING
THE
INSTRUMENT
6-4
6 DISMANTLING THE INSTRUMENT
6.1 GENERAL INFORMATION
WARNING:
The
opening
of
covers
or
removal
of
parts,
except
those
to
which
access can
be gained by
hand,
is
likely
to
expose
live parts,
and
also
accessible
terminals
may
be
live.
The instrument shall be disconnected from all voltage sources before
any adjustment, replacement or maintenance and repair during which
the instrument will be opened.
If
afterwards
any
adjustment,
maintenance
or
repair
of
the
opened
instrument
under
voltage
is
inevitable,
it
shall
be
carried
out
only
by
a
qualified
person
who
is aware
of
the
hazard
involved.
Bear in mind that capacitors inside the instrument may still be charged
even if the instrument has been separated from all voltage sources.
ATTENTION:
This
section
provides
the
dismantling
procedures
required
for
the
removal
of
components
during
repair operations.
All
circuit
boards
removed
from
the
oscilloscope
should
be
adequately
protected
against
damage,
and all
normal precautions
regarding
the
use
of
tools
must
be
observed.
During dismantling procedures, a careful note must be made of all
disconnected leads, to ensure that they may be reconnected to
their correct terminals during assembly.
Damage may result if the instrument is switched on when a circuit
board has been removed, or if a circuit board is removed within
one minute after switching off the instrument.
NOTE: All screws which have to be remounted directly in the housing-parts must be
fixed with a torque of maximum 1 Nm.
6.2 REMOVING THE TOP- AND BOTTOM COVERS
To adjust the instrument it is necessary to remove both the top- and bottom covers.
6.2.1 Removing the top cover
~ remove the 6 mounting screws, 3 left, 3 right, 2 on the top (fig. 6.1)
— now the top cover can be lifted vertically.
6.2.2 Removing the bottom cover
— remove the 8 mounting screws, 1 left, 1 right, 6 on the bottom.
- now, the bottom cover can be lifted vertically.
6.2.3 Remounting the covers.
Remounting the covers can be carried out in reversed order.
6.1 GENERAL INFORMATION