Service manual

5. DISASSEMBLY AND ASSEMBLY
5.20 Service Manual BSM-4100
3. Place the chassis block face up on the table. Remove the 4 screws from the
LCD unit as shown below and separate the LCD unit from the chassis block.
CAUTION
••
••
• Since the LCD unit is covered with glass, do not apply a mechanical
shock such as dropping or pressure to the LCD unit.
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• Before placing the LCD unit face down on the table, check that the
table is covered with a clean, soft and smooth material to avoid
making the screen dirty or damaging the screen.
4. Place the LCD unit face down on the table covered with a clean, soft and
smooth material.
5. Replace the backlight lamps with new ones as follows.
CAUTION
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••
• Handle the backlight lamp cover carefully because the edges may be
sharp and can hurt you.
••
••
• When removing the 2 old backlight lamps from the holder, use a small
tip tool such as small flat-blade screwdriver and carefully insert it
between the lamp and holder at both ends. Be careful because the
lamp can be easily broken.
••
••
• Since the lamp is covered with glass, do not apply a mechanical
shock such as dropping or pressure to the lamp. If the lamp has a
small crack, the gas composition in the lamp will gradually change
and the lamp may deteriorate too much in a short period.
••
••
• Check that the cable between the inverter board and lamps is not
damaged. If the cable has even slight damage, it may break the vinyl
of the wire and short circuit may occur because a high voltage is
output for the lamps through the cable.