Toshiba 50HP82 Service Manual page 8

SAFETY PRECAUTIONS
1 . Cautions for disassembly
(1) For the suspension-type set (No. of workers: 3
to 5 including assistants)
• Take adequate measures in order not to dam-
age the surface of the set or the filter, using a
protection mat (vinyl sheet or blanket).
• When relieving the set from the condition of
suspension from the ceiling, do not tilt its main
body too much by supporting its both sides,
while the mounting hooks (top and bottom) are
released. (Reasons: If the main body is posi-
tioned slantwise, a load is applied to its upper
part and there can be danger of making the
set fall down carelessly when the set is un-
hooked.)
• During disassembly, the allocation of person-
nel should be such that suitable stands or plat-
forms are assuredly arranged to enable the
personnel to support the set, standing on both
sides of the set. For safety, it is preferable to
provide for assistant personnel who can receive
the removed set.
• During this removal work, support the set at its
frame with hands. Never touch the filter or glass
surface. Assistant personnel on the front side
should apply hands to the lower part of the
casing. [If the casing is strongly hit with a
wooden hammer or the like, the unseen side
area of the module panel glass may be broken
even though the module itself does not seem
to have been broken . Therefore , support the
frame by hand in order not to drop it.]
(2) For the wall-hang type, corner type, or pole unit
mounting set (No. of workers: 2 <generally>)
• Examining a good timing, release the mount-
ing hooks (top and bottom) from the right and
the left.
• If the set is installed in an elevated place, pro-
vide for firm scaffolds in advance. It is prefer-
able to ask for the support of assistant person-
nel as in the case of the suspension type.
• During this removal work, try to support the set
at its frame with hands. Never touch the filter
or glass surface. Assistant personnel on the
front side should apply hands to the lower part
of the casing. [If the casing is strongly hit with
a wooden hammer or the like, the unseen side
area of the module panel glass may be broken
even though the module itself does not seem
to have been broken. Therefore, support the
frame by hand in order not to drop it.]
2. The least minimum caut ions for product disas-
sembly
• Secure a working space, arranged as wide as pos-
sible.
• Prior to disassembling the set, protect the acrylic
surface with an air mat or the like.
• To prevent the thread ridges from being damaged,
use an adequate screwdriver.
• Many screws are actually used. Therefore, use
two or three containers where these screws can
be kept . Never disassemble the inner parts of the
module (pipes, etc.).
• When lifting the module from the set, two persons
should stand on both sides of the module to hold
the stable parts of the junction while they lift the
module upright. (If dust or such foreign substance
enters in between the module and the filter, moir*
or similar problems can arise. In addition, once it
enters, it is necessary to take careful measures
not to damage the contamination area while re-
moving contaminants.) [Please understand that the
replacement of the module may call for an air-blast
treatment (air brush) in a clean room.]
Complementary caution) In particular, if a conduc-
tive foreign matter (such as a metallic chip) is at-
tached to the flexible cable of the module, there
can be danger of the occurrence of a phenom-
enon like wire breakage that is caused by parti-
tion breakdown in the module. For this reason, it
is necessary to bear in mind that the flow of air
blast should be directed only in the predetermined
direction at all times.
3. Method of returning the set (when returning the
set to the manufacturing base in Japan)
• When returning the set, put the set in the speci-
fied package box.
Otherwise, swinging and vibration Ioads may be
applied to the set during transportation, and this
may give rise to destruction of a mounting sec-
tion, such as gas-hermetically-sealed pipe (glass)
of the moduIe.
• When optional parts are also put in the box for
returning, a list of options (accessories) should also
be produced and returned, if possible. This ar-
rangement is effective to confirm the owner of the
returned items.
• To confirm the user-oriented problem, and for the
purpose of future improvements, a report of rea-
sons for malfunction should also be packed.
A definite address should be specified so that the
repaired set can be returned and faulty phenom-
ena can be confirmed .
2-6