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EN 12
4.
Q549.6E LA
4.2
Service Positions
For easy servicing of this set, there are a few possibilities
created:
•
The buffers from the packaging.
•
Foam bars (created for Service).
4.2.1
Foam Bars
Required for sets
1
42"
Figure 4-3 Foam bars
The foam bars (order code 3122 785 90580 for two pieces) can
be used for all types and sizes of Flat TVs.
See
Figure 4-3
for details. Sets with a display of 42" and larger,
require four foam bars [1]. Ensure that the foam bars are
always supporting the cabinet and never only the display.
Caution: Failure to follow these guidelines can seriously
damage the display!
By laying the TV face down on the (ESD protective) foam bars,
a stable situation is created to perform measurements and
alignments. By placing a mirror under the TV, you can monitor
the screen.
4.3
Assy/Panel Removal
4.3.1
Rear Cover
Warning: Disconnect the mains power cord before you remove
the rear cover.
Note: it is not necessary to remove the stand while removing
the rear cover.
Removing the Piezo Touch Control Panel PWB requires
special attention. Refer to
details.
1. Remove all screws of the rear cover.
2. Lift the rear cover from the TV. Make sure that wires and
flat coils are not damaged while lifting the rear cover from
the set.
4.3.2
Speakers
Each speaker unit is mounted with two screws.
When defective, replace the whole unit.
2009-May-29
Mechanical Instructions
1
E_06532_018.eps
171106
Piezo Touch Control Panel
for
4.3.3
Ambi Light
Each Ambi Light unit is mounted on a subframe. Refer to
Figure 4-4
for details.
Figure 4-4 Ambi Light unit
1. Unplug the connector(s) [1].
2. Remove the screws [2].
3. The PWB can now be taken from the subframe.
When defective, replace the whole unit.
Note: the screws that secure the AmbiLight units are longer
than the other screws.
4.3.4
Main Power Supply PSU 42/47N&T DELTA DPS-288CP A &
Power Supply IPB 42 DELTA 2K9 N&T
1. Unplug all connectors.
2. Remove the fixation screws.
3. Take the board out.
When defective, replace the whole unit.
4.3.5
Piezo Touch Control Panel
The flexfoil between Piezo Flexfoil Assy (mounted on the
plastic rim of the set), and the PWB as described below, is
extremely vulnerable. Do not pull hard at the PWB or
flexfoil.
Once the flexfoil has been damaged, the entire plastic rim
of the set (with the touch-control pads) has to be swapped!
The Piezo Touch Control Panel PWB contains ESD sensitive
components, implying that necessary industrial ESD
precautions must be taken during removing or remounting.
Refer to
Figure 4-5
and
2
1
18570_202_090526.eps
Figure 4-6
for details.
090526
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