NEC Projector UM351W User Manual

120
7. Maintenance
6.	 Insert	the	large	filter	case	into	the	projector	cabinet.
	 Make	sure	that	the	filter	 case	 is	inserted	 in	the	 correct	 orienta-
tion.
7.  Put the small filter case to the projector cabinet.
	 Make	 sure	that	the	filter	 case	 is	inserted	 in	the	 correct	 orienta-
tion.
8.  Put the filter cover back to the projector cabinet.
	 Insert	 two	catches	 of	the	 tip	of	the	 filter	 cover	 into	the	groove	 of	the	
cabinet, and push the button to close the filter cover.
•	 If	 you	find...

121
7. Maintenance
 Cleaning the Projection Window
•	 Turn	off	the	projector	before	cleaning.
•	 Do	not	scratch	or	mar	the	projection	window	as	it	is	made	of	glass.
•	 Use	a	blower	 or	lens	 paper	 to	clean	 the	projection	 window,	and	be	careful	 not	to	scratch	 or	mar	 the	glass	 sur-
face.
 WARNING
•	 Do	 not	use	 a	spray	 containing	 flammable	 gas	to	get	 rid	of	accumulated	 dust	and	dirt	on	the	 projection	 window.	
It	may	cause	of	fire.
 Cleaning the Cabinet
Turn	off	the	projector,	and	unplug...

122
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.” 	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	102)
 CAUTION
•	 DO	NOT...

123
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.
To	replace	the	lamp: 	
1. Remove the lamp cover.
(1)	Loosen	the	lamp	cover	screw
	 •	 The	lamp	cover	screw	is...

124
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)	Slide	the	lamp...

125
7. Maintenance
To	replace	the	filters:
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...

126
7. Maintenance
3. Remove the four filters and use a vacuum cleaner to vacuum 
all the dust inside and outside.
  Get rid of dust in the sponge 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	 clogging.
4. Remove  dust  from  the  filter  cover  and  the  two  filter  cases 
(large and small).
  Clean both outside and inside.
5. Attach...

127
7. Maintenance
6.	 Insert	the	large	filter	case	into	the	projector	cabinet.
	 Make	sure	that	the	filter	 case	 is	inserted	 in	the	 correct	 orienta-
tion.
7.  Put the small filter case to the projector cabinet.
	 Make	 sure	that	the	filter	 case	 is	inserted	 in	the	 correct	 orienta-
tion.
8.  Put the filter cover back to the projector cabinet.
	 Insert	 two	catches	 of	the	 tip	of	the	 filter	 cover	 into	the	groove	 of	the	
cabinet, and push the button to close the filter cover.
•	 If	 you	find...

128
8. Appendix
1 Troubleshooting
This	section	helps	you	resolve	problems	you	may	encounter	while	setting	up	or	using	the	projector.
Indicator Messages
Power	Indicator
Indicator ConditionProjector	ConditionNote
Off The main power is off –
Blinking light Blue
0�5 sec On,0�5 sec OffThe projector is getting ready to turn on�Wait for a moment�
2�5 sec On,0�5 sec OffOff Timer is enabled� –
Orange Cooling Wait for a moment
Steady light BlueThe projector is turned on�–
Orange In  Standby  condition  [NETWORK...

129
8. Appendix
Common Problems & Solutions
(→	“Power/Status/Lamp	Indicator” 	on	page	128.)
ProblemCheck	These	Items
Does not turn on
or shut down•	 Check	 that	the	power	 cord	is	plugged	 in	and	 that	 the	power	 button	 on	the	 projector	 cabinet	or	the	 remote	 control	is on� (→ pages 13, 14)•	 Ensure	that	the	lamp	cover	is	installed	correctly.	(→ page 124)•	 Check	 to	see	 if	the	 projector	 has	overheated.	 If	there	 is	insufficient	 ventilation	around	the	projector	 or	if	the	 room	where you are...