NEC Projector PA621U User Manual

							199
9. Appendix
 Mounting the cable cover (sold separately)
Mounting	the	separately	 sold	cable	 cover	 on	the	 projector	 allows	you	hide	 the	cables	 for	a	cleaner 	
appearance.
 CAUTION
•	After	mounting	 the	cable	 cover,	 be	sure	 to	fasten	 using	the	screws	 provided. 	If	 not,	 the	cable	 cover	 could	fall,	
damaging	the	cable	cover	and	possibly	resulting	in	injury.
•	 Do	not	bundle	the	power	cord	and	place	it	under	the	cable	cover. 	Doing	so	could	lead	to	fire.
•	 Do	not	apply	 excessive	 force	to	the	 cable	 cover.	Doing	 so	could	 damage	 the	cable	 cover,	 resulting	 in	the	
projector	falling	or	causing	injury.
Mounting
Preparations:
1. Connect the power cord and cables to the projector (the connection cords are omitted from the diagrams).
2.  Prepare a Phillips screwdriver.
1.  Insert the two round protrusions on the left and right edges 
of  the  cable  cover  into  the  grooves  in  the  bottom  of  the 
projector to line it up.
NOTE:	 Be	careful	 not	to	let	 the	 power	 cord	and	cables	 get	pinched	 by	the	
cable	cover.
2. Turn the cable cover screw clockwise.
-  Tighten the screw securely.
Removing
1. Turn the cable cover screw counterclockwise until it turns 
loosely.
-  Hold  the  cable  cover  while  doing  this  to  prevent  it  from 
falling.
- The screw does not come completely off.
2. Remove the cable cover.
-  Turn the cable cover a little, then lift it off.
1
2
1
2 
						

							200
9. Appendix
 Pin Assignments of D-Sub COMPUTER Input Connector
Mini D-Sub 15 Pin Connector
Signal	Level
Video	signal	:	0.7Vp-p	(Analog)
Sync	signal	:	TTL	level
5
14 23 10
11
12 1314 15
69 78
Pin No. RGB	Signal	(Analog)YCbCr	Signal1RedCr2Green	or	Sync	on	GreenY3BlueCb4Ground5Ground6Red	GroundCr	Ground7Green	GroundY	Ground8Blue	GroundCb	Ground9No	Connection10Sync	Signal	Ground11No	Connection12Bi-directional	DATA	(SDA)13Horizontal	Sync	or	Composite	
Sync14Vertical	Sync15Data	Clock 
						

							201
9. Appendix
 Troubleshooting
This	section	helps	you	resolve	problems	you	may	encounter	while	setting	up	or	using	the	projector.
Indicator Messages
Power Indicator
Indicator	display	Projector	status	Procedure
Off	Power	is	off.–
FlashingBlue	(short	flashes)Preparing	to	turn	power	onWait	a	while.
Blue	(long	flashes)Off	timer	(enabled)
Program	timer	(off	time	enabled)
–
Orange	(short	
flashes)
Projector	coolingWait	a	while.
Orange	(long	flashes)Program	timer	(on	time	enabled)
LitBluePower	on–
Red	Standby	mode	(NORMAL)–
OrangeStandby	mode	(NETWORK	STANDBY)–
Status Indicator
Indicator	display	Projector	status	Procedure
OffNo	problem,	or	
standby	mode	
(POWER-SAVING	or 
NETWORK	STAND-
BY)
–
FlashingRed	(cycles	
of	1)
Cover	problemThe	lamp	 cover	 is	not	 properly	 mounted. 	Mount	 it	properly. 	(→ 
Page	161)
Red	(cycles	
of	4)
Fan	problemThe	 cooling	 fan	has	 stopped	 turning.	Contact	 an	NEC	 projector	
customer	support	center	for	repairs.
Red	(cycles	
of	9)
Iris	error	The	iris	is	not	 operating	 properly.	Contact	 an	NEC	 projector 	
customer	support	center	for	repairs.
FlashingOrangeNetwork	conflictIt	is 	not 	possible 	to 	connect 	the 	projector’s 	built-in 	LAN 	and	
wireless	 LAN	simultaneously	 to	the	 same	 network. 	To	 connect	
the	 projector’s	 built-in	LAN	and	wireless	 LAN	simultaneously,	
connect	them	to	different	networks.
LitGreen	Standby	mode	
(NORMAL)
–
OrangeButton	has	been	
pressed	while	
projector	is	in	key	lock	
mode
The	projector’s	 keys	are	locked. 	The	 setting	 must	be	canceled	
to	operate	the	projector. 	(→	Page	106)
Projector’s	ID	number	
and	remote	control’s	
ID	number	do	not	
match
Check	the	control	IDs.	(→	Pages	106	and	107) 
						

							202
9. Appendix
Lamp Indicator
Indicator	display	Projector	status	Procedure
OffThe	lamp	is	turned	off.–
FlashingGreenPreparing	to	relight	lamp	after	
lighting	has	failed
Wait	a	while.
RedLamp	replacement	grace	
period
The	lamp	 has	reached	 the	end	 of	its	 service	 life	and	
is	now	 in	the	 replacement	 grace	period	 (100	hours). 	
Replace	the	lamp	as	soon	as	possible. 	(→	page	159)
Red	(cycles	
of	6)
Lamp	does	not	lightThe	lamp	 has	not	turned	 on.	Wait	 at	least	 1	minute,	 then	
turn	the	power	 back	on.	If	 the	 lamp	 still	does	 not	light,	
contact	an	NEC	projector	customer	support	center.
LitRedLamp	usage	time	exceededThe	 lamp	 has	exceeded	 its	usage	 time.	The	 projector’s	
power	 cannot	 be	turned	 on	until	 the	lamp	 is	replaced. 	
(→	page	159)
GreenLamp	lit–
Temp. Indicator
Indicator	display	Projector	status	Procedure
OffNo	problem
FlashingRed	(cycles	of	2)Temperature	problemThe	temperature 	protector 	has 	been 	activated. 	If 	the	
room	 temperature	 is	high,	 move	 the	projector	 to	a	cool	
place. 	If 	the 	problem 	still 	persists, 	contact 	an 	NEC	
projector	customer	support	center.
LitOrangeHigh	surrounding	temperatureThe	 surrounding	 temperature	 is	high. 	Lower	 the	room	
temperature.
If the temperature protector is activated
If	the	 projector’s	 internal	temperature	 rises	abnormally,	 the	lamp	 turns	 off	and	 the	temperature	 indicator	flashes	
(repeatedly	in	cycles	of	2).
It	may	 happen	 that	the	projector’s	 temperature	 protector	is	simultaneously	 activated	and	the	projector’s	 power	turns	
off.
If	this	happens,	do	the	following:
-	 Unplug	the	power	cord	from	the	power	outlet.
-	 If	using	in	a	place	where	the	surrounding	temperature	is	high,	move	the	projector	to	a	different,	cool	place.
-	 If	there	is	dust	in	the	ventilation	holes,	clean. 	(→ pages 155	and	158)
-	 Wait	as	such	about	1	hour	for	the	projector’s	internal	temperature	to	lower. 
						

							203
9. Appendix
Common Problems & Solutions
(→	“Power/Status/Lamp	Indicator” 	on	page	214.)
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 161)
•	 Check	 to	see	 if	the	 projector	 has	overheated.	 If	there	 is	insufficient	 ventilation	around	the	projector	 or	if	the	
room where you are presenting is particularly warm, move the projector t\
o a cooler location�
•	 Check	 to	see	 if	you	 continue	 to	use	 the	projector	 for	another	 100	hours	 after	the	lamp	 has	reached	 the	end	
of its life� If so, replace the lamp� After replacing the lamp, reset the lamp hours used� (→ page 116)
•	 The	lamp	may	fail	to	light.	Wait	a	full	minute	and	then	turn	on	the	power	again.
•	 Set	 [FAN	MODE]	 to	[HIGH	 ALTITUDE]	 when	using	 the	projector	 at	altitudes	 approximately	 5500	feet/1600	
meters  or  higher �  Using  the  projector  at  altitudes  approximately  5500  feet/1600  meters  or  higher  without 
setting to [HIGH ALTITUDE] can cause the projector to overheat and the projector could shut down� If this 
happens, wait a couple minutes and turn on the projector � (→ page 108)
 If you turn on the projector immediately after the lamp is turned off, the fans run without displaying an image 
for some time and then the projector will display the image� Wait for a moment�
Will turn off•	 Ensure	that	the	[OFF	TIMER],	[AUTO	POWER	OFF]	or	[PROGRAM	TIMER]	is	off.	(→ page 101, 111)
No picture•	Check if the appropriate input is selected� (→ page 16) If there is still no picture, press the SOURCE button 
or one of the input buttons again�
•	 Ensure	your	cables	are	connected	properly.
•	 Use	menus	to	adjust	the	brightness	and	contrast.	(→ page 93)
•	 Ensure	that	the	lens	cover	is	open.	(→ page 14)
•	 Reset	the	settings	or	adjustments	to	factory	preset	levels	using	the	[RESET]	in	the	Menu.	(→ page 116)
•	 Enter	your	registered	keyword	if	the	Security	function	is	enabled.	(→ page 37)
•	If the HDMI input or the DisplayPort signal cannot be displayed, try the following�
- Reinstall your driver for the graphics card built in your computer, or use the updated driver �
 For reinstalling or updating your driver, refer to the user guide accompanied with your computer or graphics 
card, or contact the support center for your computer manufacturer �
Install the updated driver or OS on your own responsibility�
We are not liable for any trouble and failure caused by this installation\
�
•	 Be	sure	to	connect	 the	projector	 and	notebook	 PC	while	 the	projector	 is	in	 standby	 mode	and	before	 turning	
on the power to the notebook PC�
 In  most  cases  the  output  signal  from  the  notebook  PC  is  not  turned  on  unless  connected  to  the  projector 
before being powered up�
*  If the screen goes blank while using your remote control, it may be the result of the computer’s screen-saver 
or power management software�
•	 See	also	the	page	218�
Picture suddenly 
becomes dark
•	 Check	 if	the	 projector	 is	in	 the	 Forced	 ECO	mode	 because	 of	too	 high	 ambient	 temperature.	 If	this	 is	the	 case,	
lower the internal temperature of the projector by selecting [HIGH] for \
[FAN MODE]� (→ page 108)
Color tone or hue is 
unusual
•	 Check	 if	an	 appropriate	 color	is	selected	 in	[WALL	 COLOR].	 If	so,	 select	 an	appropriate	 option.	(→  page 
101)
•	 Adjust	[HUE]	in	[PICTURE].	(→ page 93)
Image isn’t square to 
the screen
•	 Reposition	the	projector	to	improve	its	angle	to	the	screen.	(→ page 17)
•	 Use	the	Keystone	correction	function	to	correct	the	trapezoid	distortion.	(→ page 22)
Picture is blurred•	 Adjust	the	focus.	(→ page 19)
•	 Reposition	the	projector	to	improve	its	angle	to	the	screen.	(→ page 17)
•	 Ensure	 that	the	distance	 between	the	projector	 and	screen	 is	within	 the	adjustment	 range	of	the	 lens. 
(→ page 201)
•	Has the lens been shifted by an amount exceeding the guaranteed range? (→ page 205)
•	 Condensation	 may	form	 on	the	 lens	 if	the	 projector	 is	cold,	 brought	 into	a	warm	 place	and	is	then	 turned	 on.	
Should this happen, let the projector stand until there is no condensati\
on on the lens� 
						

							204
9. Appendix
Flicker appears on 
screen
•	Set  [FAN  MODE]  to  other  than  [HIGH  ALTITUDE]  mode  when  using  the  projector  at  altitudes  approximately  5500 
feet/1600 meters or lower� Using the projector at altitudes less than approximately 5500 feet/1600 meters and setting 
to [HIGH ALTITUDE] can cause the lamp to overcool, causing the image to flicker � Switch [FAN MODE] to [AUTO]� (→ 
page 108)
Image is scrolling 
vertically, horizontally 
or both
•	 Check	the	computer’s	 resolution	and	frequency.	 Make	sure	that	the	resolution	 you	are	trying	 to	display	 is	
supported by the projector � (→ page 207)
•	 Adjust	the	computer	image	manually	with	the	Horizontal/Vertical	in	the	[IMAGE	OPTIONS].	(→ page 95)
Remote control does 
not work
•	 Install	new	batteries.(→ page 9)
•	 Make	sure	there	are	no	obstacles	between	you	and	the	projector.
•	 Stand	within	22	feet	(7	m)	of	the	projector.	(→ page 9)
•	To  perform  computer  mouse  operations  using  the  projector’s  remote  control,  connect the  optional  mouse 
receiver to the computer� (→ page 30)
Indicator is lit or 
blinking
•	 See	the	POWER/STATUS/LAMP	Indicator.	(→ page 214)
Cross color in RGB 
mode
•	 Press	the	AUTO	ADJ.	button	on	the	projector	cabinet	or	the	remote	control.	(→ page 24)
•	 Adjust	the	computer	 image	manually	 with	[CLOCK]/[PHASE]	 in	[IMAGE	 OPTIONS]	 in	the	 menu.	 (→  page 
94)
For	more	information	contact	your	dealer. 
						

							205
9. Appendix
If there is no picture, or the picture is not displayed correctly.
•	 Power	on	process	for	the	projector	and	the	PC.
	 Be	sure	to	connect	 the	projector	 and	notebook	 PC	while	 the	projector	 is	in	 standby	 mode	and	before	 turning	 on	
the	power	to	the	notebook	PC.
	 In	most	cases	 the	output	 signal	from	the	notebook	 PC	is	not	 turned	 on	unless	 connected	 to	the	 projector	 before	
being	powered	up.
NOTE:	You	can	check	 the	horizontal	 frequency	of	the	 current	 signal	in	the	 projector’s	 menu	under	 Information.	 If	it	reads	 “0kHz”,	
this	means	there	is	no	signal	being	output	from	the	computer.	(→	page	113	or	go	to	next	step)
•	 Enabling	the	computer’s	external	display.
	 Displaying	 an	image	 on	the	 notebook	 PC’s	screen	 does	not	necessarily	 mean	it	outputs	 a	signal	 to	the	 projector. 	
When	using	a	PC	 compatible	 laptop,	a	combination	 of	function	 keys	will	enable/disable	 the	external	 display.	Usu-
ally,	 the	combination	 of	the	 “Fn” 	key	 along	 with	one	of	the	 12	function	 keys	gets	the	external	 display	to	come	 on	
or	off. 	For	 example,	 NEC	laptops	 use	Fn	+	F3,	 while	 Dell	laptops	 use	Fn	+	F8	 key	 combinations	 to	toggle	 through	
external	display	selections.
•	 Non-standard	signal	output	from	the	computer
	 If	the	output	 signal	from	a	notebook	 PC	is	not	 an	industry	 standard,	 the	projected	 image	may	not	be	displayed	
correctly. 	Should	 this	happen,	 deactivate	 the	notebook	 PC’s	LCD	screen	 when	the	projector	 display	is	in	 use. 	Each	
notebook	 PC	has	 a	different	 way	of	deactivate/reactivate	 the	local	 LCD	screens	 as	described	 in	the	 previous	 step.	
Refer	to	your	computer’s	documentation	for	detailed	information.
•	 Image	displayed	is	incorrect	when	using	a	Macintosh
	 When	 using	a	Macintosh	 with	the	projector,	 set	the	 DIPswitch	 of	the	 Mac	 adapter	 (not	supplied	 with	the	projector)	
according	to	your	resolution. 	After	setting,	restart	your	Macintosh	for	the	changes	to	take	affect.
	 For	setting	display	 modes	other	than	those	 supported	 by	your	 Macintosh	 and	the	projector,	 changing	the	DIP	 switch 	
on	a	Mac	 adapter	 may	bounce	 an	image	 slightly	 or	may	 display	 nothing. 	Should	 this	happen,	 set	the	 DIP	 switch	
to	the	 13"	 fixed	 mode	 and	then	 restart	 your	Macintosh. 	After	 that,	restore	 the	DIP	 switches	 to	a	displayable	 mode	
and	then	restart	the	Macintosh	again.
NOTE:	A	Video	 Adapter	 cable	manufactured	 by	Apple	 Computer	 is	needed	 for	a	PowerBook	 which	does	not	have	 a	mini	 D-Sub	
15-pin	connector.
•	 Mirroring	on	a	PowerBook
*	 When	 using	the	projector	 with	a	Macintosh	 PowerBook,	 output	may	not	be	set	 to	1024	 ×	768	 unless	 “mirroring” 	
is	off	on	your	PowerBook. 	Refer	to	owner’s	manual	supplied	with	your	Macintosh	computer	for	mirroring.
•	 Folders	or	icons	are	hidden	on	the	Macintosh	screen
	 Folders	or	icons	 may	not	be	seen	 on	the	 screen. 	Should	 this	happen,	 select	[View]	→	[Arrange]	 from	the	Apple	
menu	and	arrange	icons. 
						

							206
9. Appendix
NOTE:	Contact	your	local	dealer	for	a	full	list	of	the	PC	Control	Codes	if	needed.
Cable Connection
Communication	Protocol
Baud rate �����������������������������������������38400 bps
Data length  ��������������������������������������8 bits
Parity �����������������������������������������������No parity
Stop bit ��������������������������������������������One bit
X on/off ��������������������������������������������None
Communications procedure �������������Full duplex
NOTE:	Depending	on	the	equipment,	a	lower	baud	rate	may	be	recommended	for	long	cable	runs.
PC Control Connector (D-SUB 9P)
 PC Control Codes and Cable Connection
PC Control Codes
Function  Code Data
POWER ON 02H 00H 00H 00H 00H 02H
POWER OFF  02H 01H 00H 00H 00H 03H
INPUT SELECT COMPUTER 1  02H 03H 00H 00H 02H 01H 01H 09H
INPUT SELECT COMPUTER 2  02H 03H 00H 00H 02H 01H 02H 0AH
INPUT SELECT COMPUTER 3  02H 03H 00H 00H 02H 01H 03H 0BH
INPUT SELECT HDMI  02H 03H 00H 00H 02H 01H 1AH 22H
INPUT SELECT DisplayPort  02H 03H 00H 00H 02H 01H 1BH 23H
INPUT SELECT VIDEO  02H 03H 00H 00H 02H 01H 06H 0EH
INPUT SELECT S-VIDEO  02H 03H 00H 00H 02H 01H 0BH 13H
INPUT SELECT VIEWER  02H 03H 00H 00H 02H 01H 1FH 27H
INPUT SELECT NETWORK  02H 03H 00H 00H 02H 01H 20H 28H
PICTURE MUTE ON  02H 10H 00H 00H 00H 12H
PICTURE MUTE OFF  02H 11H 00H 00H 00H 13H
SOUND MUTE ON  02H 12H 00H 00H 00H 14H
SOUND MUTE OFF  02H 13H 00H 00H 00H 15H
NOTE	1:	Pins	1,	4,	6	and	9	are	no	used.
NOTE	2:	Jumper	“Request	to	Send”	and	“Clear	to	Send”	together	on	both	ends	of	the	cable	to	simplify	cable	connection.
NOTE	3:	For	long	cable	runs	it	is	recommended	to	set	communication	speed	within	projector	menus	to	9600	bps.
15243
67 9
8
To GND of PC
To RxD of PC
To TxD of PC
To RTS of PC
To CTS of PC 
						

							207
9. Appendix
 Troubleshooting Check List
Before	contacting	 your	dealer	 or	service	 personnel,	 check	the	following	 list	to	be	 sure	 repairs	 are	needed	 also	by	
referring	 to	the	 “Troubleshooting” 	section	 in	your	 user’s	 manual. 	This	 checklist	 below	will	help	 us	solve	 your	problem	
more	efficiently.
*	Print	this	page	and	the	next	page	for	your	check.
Frequency of occurrence  always  sometimes (How often?_____________________)  other (__________________)
No  image  is  displayed  from  your  PC  or  video  equipment  to  the projector �
Still no image even though you connect the projector to the PC first, then start the PC�
Enabling your notebook PC’s signal output to the projector �
•	 A	combination 	of 	function 	keys 	will 	enable/disable 	the 	exter-nal	 display.	 Usually,	 the	combination	 of	the	 “Fn”	 key	along	with	 one	of	the	 12	function	 keys	turns	 the	external	 display	on	or	off.	
No image (blue or black background, no display)�
Still  no  image  even  though  you  press  the  AUTO  ADJUST button�
Still  no  image  even  though  you  carry  out  [RESET]  in  the projector’s menu�
Signal cable’s plug is fully inserted into the input connector
A message appears on the screen�( _____________________________________________ )
The source connected to the projector is active and available�
Still  no  image  even  though  you  adjust  the  brightness  and/or the contrast�
Input source’s resolution and frequency are supported by the projector �
Power
No power (POWER indicator does not light blue)  See also “Status Indicator (STATUS)”�
Power cord’s plug is fully inserted into the wall outlet�
Lamp cover is installed correctly �
Lamp  Hours  Used  (lamp  operation  hours)  was  cleared  after lamp replacement�
No  power  even  though  you  press  and  hold  the  POWER  but-ton�
Shut down during operation�
Power cord’s plug is fully inserted into the wall outlet�
Lamp cover is installed correctly�
[AUTO POWER OFF] is turned off (only models with the [AUTO POWER OFF] function)�
[OFF TIMER] is turned off (only models with the [OFF TIMER] function)�
Video and Audio
Image is too dark�
Remains  unchanged  even  though  you  adjust  the  brightness and/or the contrast�
Image is distorted�
Image appears to be trapezoidal (unchanged even though you carry out the [KEYSTONE] adjustment)�
Parts of the image are lost�
Still  unchanged  even  though  you  press  the  AUTO  ADJUST button�
Still  unchanged  even  though  you  carry  out  [RESET]  in  the projector’s menu�
Image is shifted in the vertical or horizontal direction�
Horizontal  and  vertical  positions  are  correctly  adjusted  on  a computer signal�
Input source’s resolution and frequency are supported by the projector�
Some pixels are lost�
Image is flickering�
Still  unchanged  even  though  you  press  the  AUTO  ADJUST button�
Still  unchanged  even  though  you  carry  out  [RESET]  in  the projector’s menu�
Image shows flickering or color drift on a computer signal�
Still  unchanged  even  though  you  change  [FAN  MODE]  from [HIGH ALTITUDE] to [AUTO]�
Image appears blurry or out of focus�
Still unchanged even though you checked the signal’s resolution on PC and changed it to projector’s native resolution�
Still unchanged even though you adjusted the focus�
No sound�
Audio  cable  is  correctly  connected  to  the  audio  input  of  the projector�
Still unchanged even though you adjusted the volume level�
AUDIO OUT is connected to your audio equipment (only models with the AUDIO OUT connector)�
Other
Remote control does not work�
No  obstacles  between  the  sensor  of  the  projector  and  the remote control�
Projector is placed near a fluorescent light that can disturb the infrared remote controls�
Batteries are new and are not reversed in installation� 
Buttons on the projector cabinet do not work (only models with the [CONTROL PANEL LOCK] function)
[CONTROL  PANEL  LOCK]  is  not  turned  on  or  is  disabled  in the menu�
Still unchanged even though you press and hold the EXIT button for a minimum of 10 seconds� 
						

							208
9. Appendix
In the space below please describe your problem in detail.
Information on application and environment where your projector is used
Projector
Model number:
Serial No�:
Date of purchase:
Lamp operating time (hours):
Eco Mode:  OFF  ON
Information on input signal:
Horizontal synch frequency [     ] kHz
Vertical synch frequency  [     ] Hz
Synch polarity  H  (+)  (−)
 V  (+)  (−)
Synch type  Separate  Composite
  Sync on Green
STATUS Indicator:
Steady light  Orange  Green
Flashing light [     ] cycles
Remote control model number:
Signal	cable
NEC standard or other manufacturer’s cable?
Model number:            Length:       inch/m
Distribution amplifier
Model number:
Switcher
Model number:
Adapter
Model number:
ProjectorPC
DVD player
Installation environment
Screen size:      inch
Screen type:  White matte  Beads  Polarization
  Wide angle  High contrast
 Throw distance:   feet/inch/m
 Orientation:  Ceiling mount  Desktop
Power outlet connection:
 Connected directly to wall outlet
 Connected  to  power  cord  extender  or  other  (the 
number of connected equipment______________)
 Connected to a power cord reel or other (the number 
of connected equipment______________)
Computer
Manufacturer:
Model number:
Notebook PC  / Desktop 
Native resolution:
Refresh rate:
Video adapter:
Other:
Video	equipment
VCR, DVD player, Video camera, Video game or other
Manufacturer:
Model number: