NEC Nc900ca Manual

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5.
Maintenance \bf Y\bur 
\fr\bject\br
NOTEPlease request your dealer\fi to perform cleaning of the p\firojector inside.
5-1. Cleaning the Cabinet
Before carrying out maintenance of your projector, \fe sure to always check that the projector is turned off and the power plug 
is unplugged from the electrical \fioutlet.
• Wipe with a dry, soft cloth witho\fiut nap. 
  When the ca\finet is excessively dirty, wipe with cloth well wrung after \feing dampened with a neutral detergent diluted with 
water and then finis\fih up with a dry cloth.
  When you use a che\fimical dust cloth, \fifollow the instruc\fitions in the manua\fil attached to it. \fi
•  Do not use a solven\fit, such as thinner\fi or \fenzene. The co\fiating may deteriora\fite or peel off. 
•  When removing dust on the ventilation opening, suck it off using an adapter with a \frush on a vacuum cleaner. Never allow 
the cleaner withou\fit an adapter to co\fime into direct contact or use\fi a nozzles adapter\fi in cleaning. 
•  Clean  the  ventilation  opening  at  regular  intervals.  Dust,  if  allowed  to  accumulate  there,  may  cause  heating  inside,  which 
leads to functiona\fil trou\fle. The interval\fi, which can vary with the locatio\fin of your projector, is a\fout 100 hour\fis. 
•  Do not damage the c\fia\finet \fy scratchin\fig it or allowing ha\fird o\fjects to hit it\fi. This can scratch\fi the projector. 
•  Consult your deale\fir/distri\futor a\fout\fi cleaning the insid\fie of the projector. 
NO TEDo not allow insecticide or other volatile liquid to splash on the ca\finet, lens or screen. Also, do not allow any ru\f\fer 
or plastic o\fject t\fio remain in contact w\fiith the ca\finet for\fi a long time. The c\fioating may deterior\fiate or peel off.
5-2. Cleaning the Lens
Clean  the  lens  the  same  way  as  with  camera  lens  (using  a  commercially  availa\fle  camera  \flower  or  cleaning  paper  for 
glasses). Take care not to damage the\fi lens when cleanin\fig.   
						

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5. Maintenance of \fiYour Projector
5-3. Replacing the Lamp an\ld the Air Filter
5-3-1. Warnings About Replacing the Lamp
When the usage time of the lamp \feing used as the light source exceeds the lamp replacement time (approximate), the mes-
sage “Lamp1 OverTime” or “Lamp2 OverTime” is displayed on the projector LCD screen. When this happens, the lamp has 
reached its replacement time an\fid you should replace it with a n\fiew lamp.
TIP•   The lamp replacement time (a\fipproximate) is 3,000 \fihours.
•    You  can  check  the  current  amount  of  lamp  usage  remaining  (approximate)  using  the  following  items  in  the 
adjustment menus. \fi(See page 48)
-    Amount of lamp usa\fige remaining (approximate): “\bnformation” → ” Usage” → “Lamp Remaining”
 CAUTION
DO  NOT  TOUCH  THE  LAMP  immediately  after  it  has  \feen  used.  \bt  will  \fe  extremely  hot.  Turn  the  projector  off  and  then 
disconnect the pow\fier ca\fle. Allow at \fileast one hour for\fi the lamp to cool \fi\fefore handling.
•  Use the specified la\fimp for safety and \fiperformance.
•  Do  not  mount  the  lamp  that  you  first  used  mounted  in  lamp  1  in  lamp  2,  and  do  not  mount  the  lamp  that  you  first  used 
mounted in lamp 2 \fiin lamp 1. \bf you d\fio, the lamp replacement time (a\fipproximate) will not \fi\fe calculated properly.
•  Please purchase the replacement lamp at your dealer/distri\futor. Specify NP-9LP01 as the model num\fer for the replace-
ment lamp when ordering.
•  Replace  the  air  filters  at  the  same  time  as  when  you  replace  the  lamp.  Specify  NP-9AF01  as  the  model  num\fer  for  the 
replacement filter wh\fien ordering.
•  A replacement lamp and air filter kit is also provided. Specify NP-9LP01 as the model num\fer for the replacement lamp and 
filter kit when ordering.
•  Do not remove any screws other than as \fispecified.
•  The lamp has glass attached for protecting the lamp. Handle with care to avoid accidently \freaking it. Furthermore, do not 
touch the surface of the glass. \fiThis may lead to p\fierform degradation in te\firms of \frightness.
•  \bf you continue using the lamp after the message has \feen displayed, the lamp may \flow. When the lamp \flows, it shatters 
creating a large sound, and fragments of the lamp \fecome scattered around within the lamp house. \bf this happens, please 
contact your deale\fir/distri\futor for a\fi replacement.
•  \bf you replace the lamp while the unit is installed suspended from the ceiling, take care to ensure that no one can enter \felow 
the unit. \bf the la\fimp shatters, there is a risk of lam\fip fragments flying e\fiverywhere.
NO TEThe  lamp  replacement  time  is  not  the  guarantee  time.  The  actual  replacement  time  varies  depending  on  the 
usage environment. 
						

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5. Maintenance of \fiYour Projector
5-3-2. Warnings About Replacing the Air Filter
Air filters are attached over the air inlet of the projector to prevent dust. Replace air filters periodically to maintain the projector’s 
performance.
 WARNING:
• 
When replacing air filters\fi, turn off the projector and unplug \fithe power ca\fle.
•  Dust in air filters will hinder ventilation of the projector, lead to a rise of the internal temperature and can cause a fire or 
malfunction.
 CAUTION
Before replacing the filters, turn off the projector, disconnected the power ca\fle and then allow the ca\finet to cool. Failure 
to do so can result in electric \fishock or \furn injuries.
•  Please purchase the replacement air filte\fir at your dealer/d\fiistri\futor. Specify the NP-9A\fiF01 (optional) whe\fin you order.
•  A replacement lamp and air filter kit is also provided. Specify NP-9LP01 as the model num\fer for the replacement lamp and 
filter kit when ordering. 
•  Always replace \foth of the air filters at the same time. \bf you do not replace \foth of the air filters, the air filter usage time will 
not \fe calculated c\fiorrectly.
• Air inlet
•  Air filter (rear) Air outlet
•  Air inlet
•  Air filter (side)
Model num\fer Replacement cycle
NP-9AF01 Replace each time \fiyou replace the lamp.
NP-9LF01
(Replacement lamp \fiand filter kit) 
						

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5. Maintenance of \fiYour Projector
5-3-3. Procedure for Replacing the Lamp an\ld Air Filter
• Step 1
Replace the lamp (\fiSee page 54)
• Step 2
Replace the rear air filter (See \fipage 59)
Replace the side a\fiir filter (See page \fi62)
• Step 3
Reset the lamp usa\fige time and air filt\fier usage time (See \fipage 64)
5-3-4. Replacing the Lamp
This section descr\fii\fes the procedure for replacing \foth of th\fie lamps.
\freparati\bn:  Have a Phillips he\fiad screwdriver ready.
1 Remove the lamp cover. 
  1.  
Loosen  the  screw  securing  the  lamp  cover  until  the  Phillips  screwdriver  goes  into  a  free-
wheeling condition.
The screw is not remova\fle.
  2.  
Grasp the standoff pillar of the screw securing the lamp cover and pull it up towards you to 
remove the lamp cover. 
						

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5. Maintenance of \fiYour Projector
2 Remove the lamp housing.
  1.  
Loosen the two screws securing the lamp housing until the Phillips screwdriver goes into a 
freewheeling condition.
The two screws are not remova\fle.
  2.  
Grasp the handle and \lremove the lamp housing.
At this time, pull\fi the lamp housing s\fitraight out.
 CAUTION
Make sure that lamp housin\fig is cool enough to\fi handle \fefore removing it.  
						

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5. Maintenance of \fiYour Projector
3 Install a new lamp housing.
  1.  
Insert a new lamp housing until\l the lamp housing is\l plugged into the socket.
Finally, align the protrusion for aligning the position of the lamp housing with the groove in the receptacle side of the 
projector.
Protrusion Groove 
						

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5. Maintenance of \fiYour Projector
 2.  
Secure it in place with \lthe two screws.
Be sure to tighten the sc\firews.
NO TEBe sure to install \foth L\fiamp 1 and Lamp 2. \fiThe projector will not t\fiurn on unless \foth th\fie lamps are installed.
4 Reattach the lamp cover.
  1. 
 
Align the protrusions (2 locations) in the lamp cover with the receptacle holes in the projector 
and mount the lamp \lcover. 
						

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5. Maintenance of \fiYour Projector
 2. 
 
Tighten the screw to secure the lamp cover.
Be sure to tighten the sc\firew.
This completes replacing the lamp. \fiNext, replace the air filte\firs.
•  Replace the rear air filter (See \fipage 59)
•  Replace the side a\fiir filter (See page \fi62)
NO TEAlways replace \foth of the air filters at the same time. \bf you do not replace \foth of the air filters, the air filter usage 
time will not \fe ca\filculated correctly. 
						

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5. Maintenance of \fiYour Projector
5-3-5. Replacing the Rear Air Filter
\freparati\bn: Replace the lamp fir\fist. (See page 54)
1 Open the filter cover.
  1.  
Loosen each of the\l two knobs by turning them counterclockwise.
The kno\fs are not remova\fle. \bf the kn\fio\f is too tight to \fiturn, use a Phillips \fiscrewdriver.
  2. 
 
Tilt the filter cover towards you to open it. 
						

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5. Maintenance of \fiYour Projector
2 Remove the air filter.
Pull the right side\fi of the air filter t\fiowards you to remove it.
3 Mount the air filter to the projector.
Look for an arrow (↑A\bR FLOW) indicating the installation direction on the side of the air filter. Point the arrow towards 
the projector.
  1. 
  Align the air filter to the flange on the left side of the air \linlet.
  2.  
Push the right side of the ai\lr filter against the air inlet\l on the projector.
Flange