Norcent LT2722 Manuale utente
Norcent LT2722
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LCD TV MONITOR
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS
BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY
OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES,
ERRORS OR OMISSIONS.
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Revision List
Version Release Date Revision History Model Name
A00 Jan.-09-2006 Initial Release EF84MGNKB2NCTMC
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Table Of Contents
Revision List .............…………...............……..............................................…………........................... 1
Table Of Contents .............................................................................................………….......................... 2
1. General Specifications ................................................................................………….......................... 3
2. Operating Instructions ..................................................................................……………..………….. 4
2.1 The Use Of Remote Control ..........................................................................................…………… 4
2.2 Front Panel Control Knobs ..........................................................................................…………… 5
2.3 OSD Operating ............................................................................................................…………… 5
2.4 Safety Notice ............ ...................................................................................................…………...…. 10
3. Input Specification ..........................................................................................……………………… 13
3.1 Input Signal connector ............................................................................................................... 13
3.2 Factory Preset Display Modes............................................................................................................ 14
4. Mechanical Instructions ........……………………………………………………………………………. 15
5. Repair Flow Chart ...................................................................................................................... 21
6. White Balance, Luminance Adjustment …………………………………………………………………. 26
7. BOM List ........................................................…………………………………………......................... 28
8. PCB Layout ........................………………………………………...........................………………...…. 51
8.1 Main Board ......................……....................................................…………………………………. 51
8.2 Power Board ...................……....................................................…………………………………. 55
8.3 Key/IR Board ...................…………..........................................………………………………….. 57
8.4 Earphone Board ..........................…………........................................……………………………….. 58
9. Block Diagram .........................................................................................…………………………...... 59
9.1 Main Board ...........................………........……………………………………………………………..... 59
9.2 Power Board ...................................………………………………………………………...………..... 60
9.3 Exploded View ...........................………………………………………………………………………. 61
10. Schematic Diagram .............…………....................................................…………………………… 62
10.1 Main Board ......................……....................................................………………………………… 62
10.2 Power Board ...................……....................................................………………………………… 74
10.3 Key/ IR Board ..........................…………........................................……………………………….. 76
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1. General Specifications
Items Specification
Screen Size 27” TFT LCD color Panel (CMO)
Aspect Ratio 16:9
Resolution 1280 x 720 (WXGA)
Active Display Area H x V 597.12mm x 335.88mm
Pixel Pitch 0.4665mm ×0.4665mm
Display colors 16.7 million
Contrast Ratio 600:1 (Typical)
Brightness 550 cd / m²(Typical)
Viewing Angle 170°(Horizontal) / 170°(Vertical)
Response Time 16.6 ms (Typical)
Lamp Lifetime 60,000 hr
LCD Panel
Color Temperature Cool / Warm (For PC only)
TV Tuning System NTSC 181 Channel (PLL band) electronic adjustment system
Sound System MTS + SAP
TV Function
Color Systems NTSC
AV1 RCA x 1 Audio channel L/R x 1
RCA x 1
AV2 S-Video x 1 Audio channel L/R x 1
(Shared)
Component YCbCr x 1 Audio channel L/R x 1
Video Inputs
HDTV YPbPr x 1 Audio channel L/R x 1
Signal Input Analog: D-Sub 15 pin (detachable cable)
PnP compatibility DDC2B
Input frequency Analog: FH: 31.5 KHz to 80 KHz
FV: 56 Hz to 75 Hz
Recommended Analog: 1024 x 768 (60Hz)
PC Input
Input Audio Headphone Mini-jack for stereo (3.5 ø)
Speaker (built-in): Two 5 watt speakers
Headphone Mini-jack jack stereo (3.5 ø)
Audio Output Audio Output: L / R
Line Output (RCA L/R)
OSD language English, French and Spanish (default is English)
Power Supply AC 100V~240V, 50/60 Hz
Power Power Consumption <150 W
Panel Tilt Forwards/Backwards/ Rotation -5° / +20°/ ±35°
Operating Temp. +0°C ~ + 40°C
Storage Temp. -10°C ~ + 60°C
Environment
Operating Humidity 10% ~ 85%
Dimension W x H x D (with stand) 898 x 500x285(mm)
Weight With Stand 13.4Kg
Accessories D-Sub Signal Cable, AC Power cord, 3.5mmAudio cable, Remote Controller, Battery (x2),
User’s manual
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SLEEP
With this key you can set a
time period after which the
TV should switch itself to
standby. Press the ke
y
repeatedly to select the
number of minutes. The
counter runs from 0, 30, 60,
120 minutes. The time
r
begins to count down from
the number of minutes
selected after the display has
disappeared.
SWAP
Press to swap the two
screens when PIP o
r
POP is work
2. Operations Instructions
2.1 The Use Of Remote Control
POWER:
Press to turn on/off the TV. The TV
is never completely powered off
unless it is physically unplugged.
0~9/100 Digit buttons
To select a TV channel.
CH
Press ▲or▼to brows
through the TV channels
which are not erased. To
view a blocked channel,
use the digit buttons to
access the channel and
enter
y
our access code.
VOL
Press + or – to
adjust the volume.
SIZE
Display the graphic
in 16:9 or 4:3 mode
PIP
ON/OFF
Used to switch the PIP
function ON or OFF
MUTE
Temporarily interrupt
the sound or restore it.
DISPLAY
Press this button to
Display Channel
number on the right-top
corner.
MTS
Press this key to
activate Multichannel
Television Sound,
Stereo or Mono sound.
PRE-CH
To display the previousl
y
selected TV channel.
TV/VIDEO
Select your input source: press
TV/VIDEO and ▲, ▼, ◄, ►to
select TV,S-VIDEO, AV1, AV2,
COMPONENT,VGA(PC) or
HDTV mode, according to
where you connected your
external source.
AV1/AV2 for a VCR connected
to the AV connectors of the
TV.
S-VIDEO for a S-Video VCR
connected to the S-VIDEO
connector of the TV.
COMPONENT and HDTV
input via Y,Cb,Cr / Y,Pb,Pr on
the DVD Player or set top
box.
VGA For PC mode
CAPTION
Press this button to turn
Closed Ca
p
tion on.
MENU, ▲, ▼, ◄, ►
These buttons are used to
display or adjust the various
functionalities.When the PIP
is ON but no menus are
available, use these ▲, ▼,
◄, ►to change the position
of the PIP.
V-CHIP
Use this button to define
the movies that this TV set
can receive
PIP/POP
Press this button to
display PC input and
other input on the
screen at the same time
PIP
TV/VIDEO
Select the signal source: If you
are in main picture or HDTV
mode, you can select audio1,
audio2, S-video, color contras
t
or TV signal. Otherwise, you
can only select computer
g
ra
p
hics or HDTV.
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2.2 Front Panel Control Knobs
Power Key: Press to turn on or off the TV.
MENU Key: Press to show the OSD menu and exit OSD menu at the TV.
Down / Up Key: Press to perform select function and channel.
- / + Key: Press to confirm your function selection and adjustment.
Source Key: Press to select your input source.
2.3 OSD Operations
1. Press the MENU button to display or close the main menu.
2. Use the cursor up/down to select a menu item.
3. Use the cursor left/right to enter a submenu or enable/disable the function.
4. Press the MENU button to exit the menu.
5. Use the instruction bar display under the menu to assist in the operation of this equipment.
MAIN MENU
Press the MENU button into the main OSD (On Screen Display). Adjust item include PICTURE PARAMETERS,
PC PARAMETERS, AUDIO SETTINGS, PICTURE-IN-PICTURE, CHANNEL SETTINGS, PARENTAL
CONTROLS and GENERAL SETTINGS.
PICTURE PARAMETERS
BRIGHTNESS: Adjust the brightness of the image.
CONTRAST: Adjust the contrast of the image.
SATURATION: Adjust the depth of color of the image.
HUE: Adjust the red/green hue of the image.
COLOR TEMP: Adjust the color temperature to your preference: 5000°, 6500°, 9300°K or select USER R, USER G,
USER B to define your personal settings.
FLESHTONE: The flesh tone is automatically adjusted, rendering a more natural color.
SHARPNESS: Adjust the sharpness of the video image for display accordingly.
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PC PARAMETERS
AUTO CONFIG: Enable the automatic configuration of the optimum size of the graphic.
CLOCK: Adjust the time.
PHASE: Adjust the phase of the graphic.
POSITION: Adjust the position and angle of the graphic.
AUDIO SETTINGS
BASS: Adjust bass tone.
TREBLE: Adjust treble tone.
SRS: Switch SRS surround sound ON or OFF.
MTS: Select MONO, STEREO or SAP for bilingual setup.
MUTE: Temporarily mute the sound (can be done through remote control).
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PICTURE-IN-PICTURE
PIP POSITION: The PIP can be placed in any position on the screen according to one’s wishes. If there is no
menu, use the ▲, ▼, ◄, ►buttons on the remote control to change the PIP position.
PIP SIZE: Can be used to switch the PIP off (OFF) or select the size (SMALL, MEDIUM, LARGE) of the PIP.
Can also be used to select one of two types (POP, PBP) of dual graphics.
CHANNEL SETTINGS
SYSTEM: Used to choose between (ANTENNA) or (CABLE).
CHANNEL EDIT: The auto scan function searches and stores the signal of the TV station when the YES option is
selected. The ADD or DELETE function edits the TV station signal while the channel will be displayed if the
CURRENT CH function is selected.
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PARENTAL CONTROLS
LOCK MENU: Switch the functionality to configure ratings on or off.
MPAA RATING: Configure MPAA ratings.
TV PG RATING: Configure TVPG ratings.
PASSWORD: Change the password (default is ‘1111”). Please follow the instructions on the screen. Once
changed, please remember your own password. If you have forgotten your password, please do the following:
“POWER (OFF) MENU V-CHIP MUTE” to revert to the default password of 1111.
CAPTION
Press the “CAPTION” button on the remote to initiate the functionality list as shown on the left.
CC CONTROL: Switch the subtitles function ON or OFF.
MODE: Select mode of subtitles.
DISPLAY: Select display of subtitles.
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GENERAL SETTINGS
OSD POSITION: Shift the position to one’s preference.
OSD TIMEOUT: Configure the time to be displayed on screen.
OSD LANGUAGE: Configure the language (English, French or Spanish) for the menu.
OSD LOCK: Lock the selected configurations to prevent them from being overwritten.
SLEEP TIMER: Configure the time for sleep mode.
INFORMATIONS : Display the resolution and H sync, V synch for the main graphic.。
FACTORY RESET: Select YES to revert to default configurations.
TRANSPARENCY: Adjust the brightness of the background.
Indice
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