NEC Projector PA622U User Manual

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7. Maintenance
This	section	 describes	 the	simple	 maintenance	 procedures	you	should	 follow	to	clean	 the	filters,	 the	lens,	 the	cabinet, 	
and	to	replace	the	lamp	and	the	filters.
❶ Cleaning the Filters
The	air-filter	 sponge	keeps	dust	and	dirt	from	 getting	 inside	the	projector	 and	should	 be	frequently	 cleaned.	If	 the	 filter	
is	dirty	or	clogged,	your	projector	may	overheat.
 WARNING
•	 Please	 do	not	 use	 a	spray	 containing	 flammable	 gas	to	remove	 dust	attached	 to	the	 filters,...

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7. Maintenance
2. Remove the filter unit by pulling out the tab.
Filter	unit Tab
3. Remove the four filters.
	 Hold	 and	remove	 the	filters	 fitted	to	the	 two	 sides	 of	the	 filter	
unit.
4. Use a vacuum cleaner to vacuum all the dust inside.
	 Get	rid	of	dust	in	the	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...

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7. Maintenance
6. Attach 4 new filters to both sides of the filter unit.
	 The 	installation 	locations 	of 	the 	filters 	are 	differentiated 	by	
whether	 there	are	any	 slits	 (notches). 	Install	 the	filter	 under	 the	
flange	around	the	filter	unit	as	follows.
(1)	Attach	 the	2	filters	 with	transparent	 frames	fitted	to	the	 grips	
to	the	side	of	the	filter	unit	where	the	knob	is	located.
•	 Turn	 over	the	side	 of	the	 filter	 with	the	transparent	 box	
and	then	install	it.
(2)	Attach	the	2...

141
7. Maintenance
❷ 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.
 WARNING
•	 Please	do	not	 use	 a	spray	 containing	 flammable	 gas	to	remove	 dust	attached	 to	the	 lens,	 etc.	Doing	 so	may	
result	in	fires.
❸ Cleaning...

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7. Maintenance
❹ 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...

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7. Maintenance
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.
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...

144
7. Maintenance
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.
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...

145
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...

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7. Maintenance
3. Remove the four filters.
	 Hold	onto	the	filters	fitted	to	both	sides	of	the	filter	unit	to	remove	the	filter	unit.
4.  Remove dust from the filter unit and the filter cover.
	 Clean	both	outside	and	inside.
5.  Attach 4 new filters to both sides of the filter unit.
	 The	 installation	 locations	of	the	 filters	 are	differentiated	 by	whether	 there	are	any	 slits	 (notches). 	Install	 the	filter	
under	the	flange	around	the	filter	unit	as	follows.
(1)	Attach	 the	2	filters	 with...

147
8. User Supportware
❶ Operating Environment for Software Included on CD-ROM
Names and Features of Bundled Software Programs
Name	of	software	programFeatures
Virtual	Remote	Tool
(Windows	only)
When	the	computer	 and	projector	 are	connected	 using	a	network	 (wired	LAN),	
such	operations	 as	turning	 the	projector’s	 power	on	and	 off	and	 switching	 the	
signal	can	be	performed. 	It	 is	 also	 possible	 to	send	 an	image	 to	the	 projector	
and	 register	 it	as	 the	 background	 logo.	Once	 the	image...