Toshiba A50 - Manual (Page 10)

User’s Manual x
DVD-R/-RW UJ-811BTJB-A
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The DVD -R/-RW drive employs a laser system. To ensure proper use
of this product, please read this instruction manual carefully and retain
for future reference. Should the unit ever require maintenance, contact
an authorized service location.
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Use of controls, adjustments or the performance of procedures other
than those specified may result in hazardous radiation exposure.
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To prevent direct exposure to the laser beam, do not try to open the
enclosure.