Philips FM23 AC Service Manual page 22

EN 22 4. FM23, FM24, FM33
4.3.3
Power Supply Panel
Figure 4-7 Service Position Power Supply
It is possible to perform most measurements from the
component level side (thus, how the panel is mounted in the
set). However, to reach the copper-side of the Power Supply:
1. Unplug the power.
2. Remove all fixation screws from the Power Supply.
3. Hinge the Power Supply forward, so that you can reach the
copper-side. Use a non-conducting part underneath, to
support the PWB (e.g. a carton box).
Caution: make sure that, when you hinge the Power
Supply forward, you do not damage the cables. Pay special
attention to the flat cable (on connector 0307) and the
cable on connector 0306, because they can be easily
damaged by the sharp edge of the connector plate.
4. To remove the Power Supply, unplug all cables.
5. Remove the Power Supply.
4.3.4
Audio Amplifier Panel
The solder-side of this panel is directly accessible. To access
the component-side, or to remove the whole panel, unscrew
the three fixation screws (see figure 'Power Supply Panel'), and
(re)move the panel.
4.4
PDP and Glass Plate Replacement
Mechanical Instructions
B
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270901
4.3.5
LED/Switch Panel and Speakers
LED/SWITCH PANEL
FOR VERSION WITH SPEAKERS
Figure 4-8 Service Position LED/Switch Panel and Speakers
To access or replace the LED/Switch panel and/or speakers:
1. Take the monitor from its service stand, and put it (face
down) on a soft surface (blanket, foam cushion or foam
stand), to make sure that you do not damage the front glass
plate.
2. Unscrew all fixation screws of the plastic back cover.
3. Lift and remove the plastic back cover.
4. You can access now the LED/Switch panel and/or the
speakers.
4.3.6
LED/Switch panel
To measure the component-side, or to remove the LED/Switch
panel, unscrew one fixation screw (see enlarged part of figure
'LED/Switch Panel and Speakers'), and remove the panel.
4.3.7
Loudspeakers
As soon as you have removed the plastic back cover, you must
replace the speaker-box sealing foams (12nc: 3122 358
76221). This, to ensure that the loudspeakers are airtight.
Do not stretch the foam during mounting. Pay special attention
to the corners, to make sure that the foam is not stretched and
that it is pushed in the corners.
Plastic backcover
Foam cushion
LED/SWITCH PANEL
FOR SPEAKERLESS VERSION
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