Hitachi PRIMAIDE 1440 Instruction Manual page 157

(h) Mounting of new xenon lamp
Injury due to Xenon Lamp Explosion (at mounting)
Do not touch the quartz glass part of the xenon lamp with
bare hands.
If the quartz glass part of the xenon lamp is contaminated
with dust or fingerprints, wipe it using a gauze sheet or
absorbent cotton cloth slightly moistened with high-quality
alcohol.
If the xenon lamp is turned on with dust or fingerprints left
on the surface of the quartz glass part, it may cause
contamination burn-in to decrease the mechanical strength
of the glass part, resulting in explosion of the xenon lamp.
Injury due to Xenon Lamp Explosion (at mounting)
Be sure to mount the xenon lamp in the specified direction.
If the mounting direction (polarity) is wrong, the cathode
will be consumed significantly to disable turn-on of the
lamp.
Mount the lamp so that the '+' (anode) mark on it will be
positioned at the support metal of the lamp holder.
If the lamp with its cathode consumed excessively is used
continuously, pressure inside the lamp bulb may become
too high, causing possible explosion. To prevent this,
replace the lamp with a new one immediately if its cathode
has been consumed substantially.
Injury due to Xenon Lamp Explosion (at mounting)
If the nut on the lamp base and wiring part is loose, the
contact resistance between them will increase due to poor
contacting. This could generate a large amount of heat to
make the lamp extremely hot, resulting in possible
explosion. To prevent this, be sure to tighten the nut
securely.
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WARNING
WARNING
WARNING