NEC Projector PA621U User Manual

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7. Maintenance
(2) Push the left edges of the filters and remove the two hard 
honeycomb filters.
- The  filters  cannot  be  removed  by  pressing  the  left  and 
right edges.
4. Use a vacuum cleaner to vacuum all the dust inside.
  Get rid of dust in the accordion filter
NOTE:	
•	 Whenever	 you	vacuum	 the	filter,	 use	the	soft	 brush	 attachment	 to	
vacuum.	This	is	to	avoid	damage	to	the	filter.
•	 Do	not	wash	 the	filter	 with	water.	 Doing	so	can	 result	 in	filter	 clog-
ging.
5. Remove dust from the filter unit and the filter cover.
  Clean both outside and inside.
6. Attach the four filters to the filter unit.
(1) Insert the hard honeycomb filters into the tips of the flanges 
at the center, then bend the filters and push them in under 
the hooks.
-  The filters cannot be inserted from the outside.
(2) Turn the filter unit over.
 Mount the accordion filters under the flanges along the outer 
edges.
	 •		 Each	 accordion	 filter	has	slits	 in	it.	Align	 the	slits	 with	 the	
protrusions on the filter unit.
7. Mount the filter unit back onto the projector cabinet.
 Insert the filter unit onto the projector with the sides on which 
the left and right hooks are located on the outside.
Slit
Flange
Hook
Hook 
						

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7. Maintenance
8. Put the filter cover back to the projector cabinet.
 Insert the 4 catches on the top of the filter cover into the grooves 
in the projector, then press the left and right buttons to close.
•	 Push	the	filter	cover	until	it	clicks	into	place.
9.	 Clear	the	filter	usage	hours.
  Plug the power cord into the wall outlet, and then turn on the 
projector.
 From the menu, select [RESET] → [CLEAR FILTER HOURS]. 
(→ page 117)
 The interval time to clean the filters is set to [OFF] at time of 
shipment. When  using  the  projector  as  it  is,  you  do  not  clear 
the filter usage 
Catch
Button 
						

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7. Maintenance
 Cleaning the Lens
•	 Turn	off	the	projector	before	cleaning.
•	 The	projector	has	a	plastic	lens.	Use	a	commercially	available	plastic	lens	cleaner.
•	 Do	not	scratch	or	mar	the	lens	surface	as	a	plastic	lens	is	easily	scratched.
•	 Never	use	alcohol	or	glass	lens	cleaner	as	doing	so	will	cause	damage	to	the	plastic	lens	surface.
 Cleaning the Cabinet
Turn	off	the	projector,	and	unplug	the	projector	before	cleaning.
•	 Use	a	dry	soft	cloth	to	wipe	dust	off	the	cabinet.
	 If	heavily	soiled,	use	a	mild	detergent. 	
•	 Never	use	strong	detergents	or	solvents	such	as	alcohol	or	thinner. 	
•	 When	cleaning	the	ventilation	 slits	or	the	 speaker	 using	a	vacuum	 cleaner,	 do	not	 force	 the	brush	 of	the	 vacuum	
cleaner	into	the	slits	of	the	cabinet.
Vacuum the dust off the ventilation slits.
•	 Clogged	ventilation	slits	may	cause	a	rise	in	the	internal	temperature	of	the	projector,	resulting	in	malfunction.
•	 Do	not	scratch	or	hit	the	cabinet	with	your	fingers	or	any	hard	objects
•	 Contact	your	dealer	for	cleaning	the	inside	of	the	projector.
NOTE:	 Do	not	 apply	 volatile	 agent	such	as	insecticide	 on	the	 cabinet,	 the	lens,	 or	the	 screen.	 Do	not	 leave	 a	rubber	 or	vinyl	 product	
in	prolonged	contact	with	it.	Otherwise	the	surface	finish	will	be	deteriorated	or	the	coating	may	be	stripped	off.	 
						

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7. Maintenance
 Replacing the Lamp and the Filters
When	the	lamp	 reaches	 the	end	 of	its	 life,	 the	LAMP	 indicator	 in	the	 cabinet	 will	blink	 red	and	 the	message	 “THE	
LAMP	HAS	REACHED	 THE	END	 OF	ITS	 USABLE	 LIFE.	PLEASE	 REPLACE	 THE	LAMP	 AND	FILTER. 	USE	 THE	
SPECIFIED	 LAMP	FOR	SAFETY	 AND	PERFORMANCE.” 	will	 appear	 (*).	Even	 though	 the	lamp	 may	still	be	working,	
replace	 the	lamp	 to	maintain	 the	optimal	 projector	 performance. 	After	 replacing	 the	lamp,	 be	sure	 to	clear	 the	lamp	
hour	meter. 	(→	page	116)
 CAUTION
•	 DO	NOT	TOUCH	 THE	LAMP	 immediately	 after	it	has	 been	 used.	It	 will	 be	extremely	 hot.	Turn	 the	projector	
off	and	then	disconnect	the	power	cord. 	Allow	at	least	one	hour	for	the	lamp	to	cool	before	handling.
•	 Use	the	specified	lamp	for	safety	and	performance.
•	 DO	NOT	REMOVE	 ANY	SCREWS	 except	one	lamp	 cover	 screw	 and	two	lamp	 housing	 screws.	You	 could	 receive	
an	electric	shock.
•	 Do	not	break	the	glass	on	the	lamp	housing.
	 Keep	 finger	prints	off	the	 glass	 surface	 on	the	 lamp	 housing. 	Leaving	 finger	prints	on	the	 glass	 surface	 might	cause	
an	unwanted	shadow	and	poor	picture	quality.
•	 The	 projector	 will	turn	 off	and	 go	into	 standby	 mode	when	you	continue	 to	use	 the	projector	 for	another	 100	hours	
after	 the	lamp	 has	reached	 the	end	 of	its	 life. 	If	 this	 happens,	 be	sure	 to	replace	 the	lamp. 	If	 you	 continue	 to	use	
the	 lamp	 after	the	lamp	 reaches	 the	end	 of	its	 life,	 the	lamp	 bulb	may	shatter,	 and	pieces	 of	glass	 may	be	scattered	
in	the	 lamp	 case.	Do	 not	 touch	 them	as	the	 pieces	 of	glass	 may	cause	 injury.	If	 this	 happens,	 contact	your	NEC	
dealer	for	lamp	replacement.
*NOTE:	This	message	will	be	displayed	under	the	following	conditions:
•	 for	one	minute	after	the	projector	has	been	powered	on
•	 when	the		(POWER)	button	on	the	projector	cabinet	or	the	POWER	OFF	button	on	the	remote	control	is	pressed
To	turn	off	the	message,	press	any	button	on	the	projector	cabinet	or	the	remote	control.
Optional	lamp	and	tools	needed	for	replacement:
•	 Phillips	screwdriver	(plus-head)
•	 Replacement	lamp: 	 
NP26LP
Flow of Replacing the Lamp and the Filters
Step 1. Replace the lamp 
Step 2. Replace the filters (→ page 162)
Step 3.	 Clear	the	lamp	usage	hours	and	the	filter	usage	hours	(→ page 116, 117) 
						

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7. Maintenance
2. Remove the lamp housing.
(1)	Loosen	 the	two	 screws	 securing	 the	lamp	 housing	 until	the	phillips	 screwdriver	 goes	into	a	freewheeling	 condi-
tion.
	 •	The	two	screws	are	not	removable.
	 •		There	 is	an	 interlock	 on	this	 case	 to	prevent	 the	risk	 of	electrical	 shock.	Do	 not	 attempt	 to	circumvent	 this	
interlock.
(2)	Remove	the	lamp	housing	by	holding	it.
InterlockGuide hole
To replace the lamp: 
1. Remove the lamp cover.
(1)	Loosen	the	lamp	cover	screw
	 •	 The	lamp	cover	screw	is	not	removable.
(2)	Pull	the	bottom	of	the	lamp	cover	towards	you	and	remove	it.
CAUTION:
Make	 sure	that	the	lamp	 housing	 is	cool	
enough	to	before	removing	it. 
						

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7. Maintenance
This completes the lamp replacement.
Go on to the filter replacement.
NOTE:	When	you	continue	 to	use	 the	projector	 for	another	 100	hours	 after	the	lamp	 has	reached	 the	end	 of	its	 life,	 the	projector	
cannot	turn	on	and	the	menu	is	not	displayed.
If	this	happens,	press	the	HELP	button	on	the	remote	control	for	10	seconds	to	reset	the	lamp	clock	back	to	zero.
When	the	lamp	time	clock	is	reset	to	zero,	the	LAMP	indicator	goes	out.
	
4. Reattach the lamp cover.
(1)	Insert	the	top	edge	of	the	lamp	cover	into	the	groove	in	the	projector	and	close	the	lamp	cover.
(2)	Tighten	the	screw	to	secure	the	lamp	cover.
	 •	Be	sure	to	tighten	the	screw.
3.  Install a new lamp housing.
(1)	Insert	a	new	lamp	housing	until	the	lamp	housing	is	plugged	into	the	socket. 	
(2)	Position	so	that	 the	guide	 hole	in	the	 bottom	 right	of	the	 lamp	 house	 is	over	 the	protrusion	 on	the	 projector	 then	
press	all	the	way	in.
(3)	Secure	it	in	place	with	the	two	screws.
	 •	Be	sure	to	tighten	the	screws. 
						

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7. Maintenance
To replace the filters:
Four	filters	are	packaged	with	the	replacement	lamp.
Honeycomb	filter	(coarse	mesh):	Large	and	small	sizes	(attached	to	the	outside	of	the	filter	unit)
Accordion	filter	(fine	mesh):	Large	and	small	sizes	(attached	to	the	inside	of	the	filter	unit)
NOTE:	
•	 Replace	all	four	filters	at	the	same	time.
•	 Before	replacing	the	filters,	wipe	off	dust	and	dirt	from	the	projector	cabinet.	
•	 The	projector	is	precision	equipment.	Keep	out	dust	and	dirt	during	filter	replacement.
•	 Do	not	wash	the	filters	with	soap	and	water.	Soap	and	water	will	damage	the	filter	membrane.	
•	 Put	filters	into	place.	Incorrect	attachment	of	a	filter	may	cause	dust	and	dirt	to	get	into	the	inside	of	the	projector.	
Before	replacing	the	filters,	replace	the	lamp. 	(→	page	159)
1. Push up the buttons on the left and right to release the filter unit and pull it ou\
t.
2.  Remove the filter unit by pulling out the tab.
3.  Remove the four filters.
(1)  Turn the filter unit over and pull out the two soft accordion filters (large and small).
Filter cover
Filter unit 
						

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7. Maintenance
(2) Push the left edges of the filters and remove the two hard honeycomb filters (large and small).
	 •	The filters cannot be removed by pressing the left and right edges.
4. Remove dust from the filter unit and the filter cover.
  Clean both outside and inside.
5. Attach four new filters to the filter unit.
(1) Insert the hard honeycomb filters into the tips of the flanges at the center, then bend the filters and push them 
in under the hooks.
-  The filters cannot be inserted from the outside.
(2) Turn the filter unit over.
 Mount the accordion filters under the flanges along the outer edges.
	 •	Each	accordion	filter	has	slits	in	it. 	Align	the	slits	with	the	protrusions	on	the	filter	unit.
6. Mount the filter unit back onto the projector cabinet.
 Insert the filter unit onto the projector with the sides on which the left \
and right hooks are located on the outside.
7.  Mount the filter cover back onto the projector cabinet.
 Insert  the  4  catches  on  the  top  of  the  filter  cover  into  the  grooves  in  the  projector,  then  press  the  left  and  right 
buttons to close.
This completes the filter replacement.
Go on to the clearing lamp and filter hour meters.
To clear the lamp usage hours and the filter usage hours:
1.  Place the projector where you use it.
2.  Plug the power cord into the wall outlet, and then turn on the projector.
3.	 Clear	the	lamp	usage	hours	and	the	filter	usage	hours.
1.  From the menu, select [RESET] → [CLEAR LAMP HOURS] and reset the lamp usage hours.
2.  Select [CLEAR FILTER HOURS].and reset the filter usage hours. (→ page 117) 
						

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8. User Supportware
 Installing Software Program
Installation for Windows software
The	software	 programs	 except	Image	Express	 Utility	2	for	 Mac	 support	 Windows	 7,	Windows	 Vista,	and	Windows	
XP.
NOTE:
•	 To	 install	 or	uninstall	 each	software	 program,	 the	Windows	 user	account	 must	have	“Administrator”	 privilege	(Windows	 7,	Win-
dows	Vista)	or	“Computer	Administrator”	privilege	(Windows	XP).
•	 Exit	all	running	programs	before	installation.	If	another	program	is	running,	the	installation	may	not	be	completed.
•	 To	 run	Virtual	 Remote	 Tool	or	PC	 Control	 Utility	Pro	4	on	 Windows	 XP	Home	 Edition	 and	Windows	 XP	Professional,	 “Microsoft	
.NET	Framework	 Version	2.0	or	later”	 is	required.	 The	Microsoft	 .NET	Framework	 Version	2.0	or	later	 is	available	 from	Microsoft’s	
web	page.	Download	and	install	it	on	your	computer
•	 Image	Express	Utility	Lite	will	be	installed	to	the	system	drive	of	your	computer.
	 If	the	message	 “There	is	not	 enough	 free	space	 on	destination”	 is	displayed,	 free	up	enough	 space	(about	 100	MB)	 to	install	 the	
program.
 
1	 Insert	the	accompanying	NEC	Projector	CD-ROM	into	your	CD-ROM	drive.
 The menu window will be displayed.
TIP:
If	the	menu	window	will	not	be	displayed,	try	the	following	procedure.
For	Windows	7
1.	 Click	 “start”	on	Windows.
2.	 Click	 “All	Programs” 	→	“Accessories” 	→	“Run”.
3.	 Type 	your 	CD-ROM 	drive 	name 	(example: 	“Q:\”) 	and 	“LAUNCHER.EXE” 	in 	“Name”. 	(example: 	Q:\
LAUNCHER.EXE)
4.	 Click	 “OK”.
 the menu window will be displayed. 
						

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8. User Supportware
2	 Click	a	software	program	you	wish	to	install	on	the	menu	window.
 The installation will start.
•	 Follow	the	instructions	on	the	installer	screens	to	complete	the	installation.
TIP:
Uninstalling a Software Program
Preparation:
Exit	 the	software	 program	before	uninstalling. 	To	 uninstall	 the	software	 program,	 the	Windows	 user	account	 must	have	
“Administrator” 	privilege	(Windows	7	and	 Windows	Vista)	or	“Computer	Administrator” 	privilege	(Windows	XP).
•	For	Windows	7/Windows	 Vista
1	 Click	“Start”	and	then	 “Control	Panel”.
 The Control Panel window will be displayed.
2	 Click	 “Uninstall	a	program” 	under	“Programs”
 The “Programs and Features” window will be displayed.
3 Select the software program and click it.
4	 Click	 “Uninstall/Change” 	or	“Uninstall”.
	 •	 When	the	 “User	Account	Control” 	windows	is	displayed,	click	 “Continue”.
 Follow the instructions on the screens to complete the uninstallation.
•	For	 Windows	XP
1	 Click	 “Start”	and	then	 “Control	Panel”.
 The Control Panel window will be displayed.
2	 Double-click	 “Add	/	Remove	Programs”.
 The Add / Remove Programs window will be displayed.
3	 Click	the	software	program	from	the	list	and	then	click	 “Remove”.
 Follow the instructions on the screens to complete the uninstallation.