Philips 32PFL3904H/12 Service Manual page 12

EN 12 4. Q543.1E LA
The foam bars (order code 3122 785 90580 for two pieces) can
be used for all types and sizes of Flat TVs.
See figure Figure 4-5 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 Assembly/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.
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. A sticker on the
the unit indicates if it is the right ("R") or left ("L") box, seen from
the backside of the set, and a arrow points to the bottom of the
set.
When defective, replace the whole unit.
4.3.3 IR & LED Board
1. Unplug the connectors leading to the SSB and IR & LED
Board.
2. Lift the board and take it out.
When defective, replace the whole unit.
4.3.4 Key Board Control Panel
1. Unplug the key board connector from the IR & LED board.
2. Release the clamp on the topside using a screwdriver.
3. Lift the unit and take it out of the set.
When defective, replace the whole unit.
4.3.5 Main Supply Panel
1. Unplug all connectors.
2. Remove the fixation screws.
3. Take the board out.
When defective, replace the whole unit.
4.3.6 Small Signal Board (SSB)
Caution: It is mandatory to remount screws at their original
position during re-assembly. Failure to do so may result in
damaging the SSB.
1. Unplug all connectors.
2. Remove all screws that secure the board.
3. The SSB can now be taken out of the set, together with the
side cover.
4. To remove the side cover, push the clamp with a
screwdriver in the middle of the cover and pull the cover
sidewards from the SSB.
4.3.7 LCD Panel
Refer to Figure 4-6 for details. As every screen size has a
(slightly) different mechanical construction (some have the
2009-Nov-20
Mechanical Instructions
boards directly mounted on the LCD display, others use
brackets), we only describe one model. Disassembly method of
other LCD panels is similar to the one described below. This
particular photo is taken from a set with the timing controller
(TCON) located on the SSB.
1. Remove the Main Supply Panel and Small Signal Board as
earlier described.
2. Unplug the connectors to and from the Speakers, IR & LED
Board and Key Board Control Panel.
3. Remove the stand [1].
4. Release the subframe from the stand [2].
5. Remove the brackets [3] that secure the LCD Panel.
6. The LCD panel can now be lifted from the front cabinet.