ViewSonic N3250w-1L, VS11335-1L Service Manual

Service Manual
ViewSonic N3250w-1L
Model No. VS11335-1L
32” LCD TV
(N3250w-1L_SM Rev.1b_Aug.2008)
ViewSonic® 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright© 2006 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warr ant ies, either expressed or impli ed, with respect to the contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes.
Trademarks
Optiquest is a registered trademark of ViewSonic Corporation. ViewSonic is a registered trademark of ViewSonic Corporation. All other trademarks used within this document are the property of their respective owners.
Revision History
Revision SM Editing Date ECR Number Description of Changes Editor
1a 06/01/06 Initial Release Sophia Kao 1b 08/18/08
Add schematics of power / supply board and menu / power lock feature
Sophia Kao
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TABLE OF CONTENTS
1. Precautions and Safety Notices.................................................................1
3. Front Panel Function Control Description................................................ 9
4. Circuit Description.......................................................................................18
5. Adjustment Procedure................................................................................21
6. Trouble Shooting Flow Chart................................................................ .....51
7. Block Diagram.............................................................................................55
8. Schematic Diagrams....................................................................................56
9. PCB Layout Diagrams.................................................................................76
10. Exploded Diagram And Exploded Parts List...........................................82
11. Recommend Spare Parts List...................................................................85
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2. Specification.................................................................................................4
1. Appropriate Operation
(1) Turn off the product before cleaning. (2) Use only a dry soft cloth when cleaning the LCD panel surface. (3) Use a soft cloth soaked with mild detergent to clean the display housing. (4) Disconnect the power plug from AC outlet if the product is not used for a long period of
time.
(5) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display
off. (6) Do not touch the LCD panel surface with sharp or hard objects. (7) Do not place heavy objects on the LCD display, video cable, or power cord. (8) Do not use abrasive cleaners, waxes or solvents for your cleaning. (9) Do not operate the product under the following conditions:
- Extremely hot, cold or humid environment.
- Areas susceptible to excessive dust and dirt.
- Near any appliance generating a strong magnetic field.
- Place in direct sunlight.
2. Caution
No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly familiar with all of the following safety checks and servicing guidelines.
3. Safety Check
Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit, the voltage is exposed in such areas as the associated transformer circuits.
4. Power Supply Requirements
The external AC power operating range shall be from 90 to 264Vac
5. LCD Module Handling Precautions
5.1. Handling Precautions
(1) Since front polarizer is easily damaged, pay attention not to scratch it. (2) Be sure to turn off power supply when inserting or disconnecting from input connector. (3) Wipe off water drop immediately.Long contact with water may cause discoloration or
spots. (4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth. (5) Since the panel is made of glass, it may break or crack if dropped or bumped on hard
surface. (6) Since CMOS LSI is used in this module, take care of static electricity and insure human
earth when handling. (7) Do not open nor modify the Module Assembly. (8) Do not press the reflector sheet at the back of the module to any directions. (9) In case if a Module has to be put back into the packing container slot after once it was
taken out from the container, do not press the center of the CCFL Reflector edge.
Instead, press at the far ends of the CFL Reflector edge softly. Otherwise the TFT
Module may be damaged. (10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate nor
tilt the Interface Connector of the TFT Module. (11) After installation of the TFT Module into an enclosure (LCD monitor housing, for
example), do not twist nor bend the TFT Module even momentary. At designing the
enclosure, it should be taken into consideration that no bending/twisting forces are
applied to the TFT Module from outside. Otherwise the TFT Module may be damaged. (12) Cold cathode fluorescent lamp in LCD contains a small amount of mercury. Please
follow local ordinances or regulations for disposal. (13) Small amount of materials having no flammability grade is used in the LCD module.
The LCD module should be supplied by power complied with requirements of Limited
Power Source (IEC60950 or UL1950), or be applied exemption. (14) The LCD module is designed so that the CFL in it is supplied by Limited Current
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1. Precautions and Safety Notices
Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit.
5.2. Handling and Placing Methods Correct Methods: Incorrect Methods:
Only touch the metal frame of the LCD panel or the front cover of the monitor. Do not touch the surface of the polarizer.
Surface of the LCD panel is pressed by fingers
and that may cause “Mura”
Take out the monitor with cushions Taking out the monitor by grasping the LCD
panel. That may cause “Mura”
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Place the monitor on a clean and soft foam pad. Placing the monitor on foreign objects. That
could scratch the surface of the panel or cause “Mura”
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Parameter Specification
LCD Type
a-Si TFT Active Matrix Wide Color, Trans missive Mode, Normally
Black LCD Interface 1-Channel LVDS Resolution (Native) WXGA, 1366 x 768 Display Area 27” diagonal; 596.259 (H) x 335.232 (V) mm. Pixel Pitch 0.4365(H) × 0.4365(V) mm Viewing Angle
H = +/- 88°, V = +/- 88° with CR20 (Typical) Contrast Ratio 1000:1 (Typ); 800:1 (Min) Brightness 550 nits (Typ.); 450 nits (Min) Response Time 8ms, (Typical), g-g Color Gamut NTSC 75% Typ Brightness Uniformity 1.3 (Max), measured per panel spec. Chromaticity (CIE1931) White-x:0.285,White-y:0.293 (Standard Mode Only) Colors 16.7M (8-bit) Surface Treatment Hard coating (3H) Backlight 14 CCFLs (Cold cathode Fluorescent Lamp)
Panel Acceptance
Refer to the panel acceptance criteria specification.
Note: Intermittent and/or Display Pattern defects which result in
further bright or dark dots will be counted individually against the
above specification.
Front Screen Artifacts
VS Standard:
a.) No Visible Streaking, Sag or Smearing artifacts when driven by
the specified video cards (see 7.1 General Test Equipment) in the primary mode (VGA at 60 Hz) and after user adjustment
b.) No image drift or lose fine-tune settings due to panel temperature
change Note: Panel performance characteristics “ MUST BE” met in all display modes/inputs at standard test conditions.
1. RF Tuner
RF tuner of this product shall be provided by” Philips FQ1236/FH-5” for NTSC/ATSC. The
following table defines this tuner specification.
Parameter Specification
RF Input Level 45 ~ 85dBµV
RF Tuning Range
NTSC/PAL: 55.25 to 801.25 MHz, 2-69 Channels for Off-Air and 2-125 Channels for
CATV RF Tuner Sensitivity (S/N Ratio at un-weight) 45 dB (min.) Channel Bandwidth NTSC/PAL: 6 MHz Maximum
0.7(min.)–1.1(max.) V
CVBS Characteristics: Video Amplitude Signal DC Level Sync Pulse
Typical. 0.35 V Audio Characteristics: AF Output Level Measured via LP 20 kHz Filter, RMS Decoder, 75us De-emphasis THD S/N
Typical. 0.35Vrms
10% (max.)
44 dB (min.) Compatible system TUNER NTSC/PAL Compatible system AV NTSC M/PAL
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2. Specification
2. Video
Built-in A/D converter shall provide analog to digital converter for this product.
Input Parameter Specification
CVBS Characteristics: Video Amplitude Signal DC Level Sync Pulse
0.7(min.)–1.1(max.) V
Typical. 0.3 Vp-p S-Video Characteristics: Video Amplitude Signal DC Level Sync Pulse
Y : 1.0Vp-p W / Neg. Sync (IN 75 )
C : 0.285Vp-p (IN 75 )
Y, Cb,Cr Characteristics: Video Amplitude Signal DC Level Sync Pulse
Y:1.0Vp-p(IN 75 Ω)
Pb:0.7 Vp-p(IN 75 ),Pr:0.7 Vp-p(IN 75 Ω)
Video Bandwidth NTSC: 6 MHz Maximum HDMI Characteristics Panel Link T.M.D.S HDMI-1.1 RGB Characteristics: Signal Type Sync Type Input Signal Rating Sync Level: Frequency Range Pixel Color
Analog VGA
TTL, Separate Sync, with 4.7KΩ pull-down resistors
1250mv Max without damage to the product, 0-700 mv Full
Range
2.5-5.25 V
Horizontal: 30-80K Hz, Vertical: 50-75 Hz
16 M
3. Audio
Audio amp of this product shall be provided by “Advanic” with a Model Number of AD8256 , “MTK” MT8202 for N3250W-L shall be used as sound processor. In addition, a pair of speakers shall be integrated within this product. The audio signals of this product shall comply with the specification listed in the following table.
Parameter Specification
Phone Jack out Tuner Input Base band Input Speaker Power Output Max
Rating
10 W x 2 at 10% T.H.D
Distortion
10W x 2 at 10% T.H.D. Distortion
Speaker Impedance
main spk :3 + 3
Treble spk :5.2
main spk :3 + 3 Treble spk :5.2
Line In Per Tuner Spec
500 mV rms (Typ)
1.6 V rms (Max)
Impedance: 600 ohms
Line Out
500 mVrms +/- 10%
@1K Hz tone (with +/-25k Hz
deviation at input, volume
with non-attenuation and
loading with 47k Ohm)
500 mVrms +/- 10% @1K Hz tone (with +/-25k Hz deviation at input, volume with non-attenuation and
loading with 47k Ohm) Flatness of Amplitude Response (100Hz ~ 10KHz)
+/- 3 db (at 1KHz @1W) +/- 3 db (at 1KHz @1W)
Total Harmonic Distortion (1KHz @1W)
2% 1%
Signal to Noise (1KHz @1W) 30 dB (40Hz to 15KHz) 40dB(400Hz to 20 kHz)
4.
Electrical
The following table defines the electrical specification of this product.
ELECTRICAL SPECIFICATION
Power Input Voltage Range 100-240VAC +/- 10% Wide Range
Input Frequency Range 47-63 Hz
Input Current 3.0A @ 115VAC // 1.5A @ 230VAC
Power Supply Inrush
Max in < 150A (with fully loaded power supply) at 230Vac
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Shall not result in permanent failure of power supply (including blown fuse)
Power Consumption: Normal Normal: 150 W (Max) // Stand by: < 3 W
Interference with RF and Video
There shall be no visible interference between power supply, RF and video signals. This applies to all available RF channels and video modes.
Electromagnetic Compatibility
This product shall adhere to the compatibility and
immunity specifications in FCC. Power Supply Transient Immunity (Supply Transients and Outage)
Able to withstand an ANSI / IEEE C62.41 – 1980 2000V
ring wave with no damage.
Surge Immunity Test
Able to withstand 1.25X nominal Line Voltage for one
cycle with no damage.
Power Supply Missing Cycle Immunity
Function properly without reset or visible screen artifact
when 1/3 cycle of AC Power is randomly missing.
Power Supply Acoustics
Power supply shall not produce any audible noise during
startup and normal operation. Audible shall define to be
in compliance with ISO 7779 (DIN EN27779: 1991) .
Power Switch noise shall be Excluded. Efficiency >= 80% @ full load, nominal line
Leakage Current <0.5mA @ 240VAC
Power Saving(DPMS) N/A
Recovery Time < 3 sec.
Power Factor Correction Compliant with EN61000-3-2
5. Firmware & OSD
The product firmware of VS11257-1M / VS11335-1M shall have a firmware version of V:P 01. Any changes/revisions afterward shall also be pre-approved by ViewSonic in written. For VS11257-1M / VS11335-1M, its firmware shall have a built-in frequency table for NTSC/ATSC off-air TV/CATV, Closed-Caption, and with MTS implementation.
All audio/video and other output adjustments shall be performed by using an On Screen Display (OSD) via a Remote Control Unit (RCU) adjustments. The following tables list the OSD functions supported by VS11257-1M / VS11335-1M.
OSD Table for
VS11257-1M / VS11335-1M
OSD
Brightness Adjust the Black levels Contrast Adjust the White levels Sharpness Adjust the Sharpness levels Color Adjust the Color levels Tint Adjust the Tint levels Color Temperature Selections on Normal, Warm, user, Cold Back Light Adjust the Back Light levels Aspect ratio Selections the Image Size on Full, Wide1, Wide2, Wide3, 4:3, 16:9, No
scale, Normal
Language Selections English, Spanish ,
By area have some difference OSD Timeout Set OSD disappearing time Memory recall Set user settings to factory preset value Treble Adjust the Hi Frequency levels Bass Adjust the Low Frequency levels Balance Adjust the Spk output levels Audio out Audio signal output On or Off Surround Surround sound effect On or Off Auto Scan TV program Auto Search Tuner Mode Selections TV sources to Air or Cable Channel Edit TV channel name edit
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Channel Add/Del. TV channel Add or Delete Parental TV program controlled by parents via password setting
RCU Key function
Power Soft power on or off Picture Picture effect selections on Cinema, Sport, Vivid, Hi-bright, and User Sound Sound effect selections on Rock, POP, Live, Dance, Techno, Classic, Soft,
and User TV Swap analog TV (NTSC and PAL). Swap to TV when in other source MTS Selection on Mono, Stereo and Sap sound Sleep Set TV Power off time Info Display current source input information
Mute Mute On or Off sound 0 ~ 9, 100/- Direct channel key number Return Return to last channel Guide Electric program guide on Digital TV CH up/down Adjust channel up or channel down Volume Adjust the Volume levels Up/Down/Left/Right arrows
Select or adjust the function of OSD
Fav.ch Switch to favorite channel Fav.A/D Add or Del favorite channel Menu Turn On or Off OSD main menu or exit current menu Input Selections Input Source Freeze To freeze the current image Zoom Enlarge or shrink current image on the screen Wide Adjust image size on Full, Wide1, Wide2, Wide3, 4:3, 16:9, No scale,
Normal Enter Confirm the selection PIP/POP Toggle to select PIP or POP function P.Pos Adjust picture position of sub source during in PIP P.size Adjust image size of sub source during in PIP Swap Switch between main screen and sub screen during in PIP or POP P.input Sub source selection during in PIP or POP C.C Displaying captions during closed caption source and closed caption mode
select V-chip Set V-chip rating
6. Remote Control Unit (RCU)
An IR remote control unit shall accompany this product along with battery. In addition, this remote control unit shall have an operational distance of 5 meters and an operational angle of 15 degrees for both horizontal and vertical.
Parameter Specification
Type IR; Made by Bontech Electronics Co., Ltd.
Range
Off axis ± 15° ≥ 5M
On axis: 7M Life Testing (Buttons)
100,000 cycle operations at a rate of 20~30 cycle / minute without load (with
battery)
Color
Painting Color - PANTONE 427C (Black for front bezel & back cover)
Power Key - PANTONE 032C (RED)
Key Pads – PANTONE 11C & PANTONE 5C(Cool Gray)
Texts Printed on Front Cover and Key Pads - PANTONE 427C, PANTONE
433C(Black)
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7. Mechanical
The following table defines the mechanical specifications of this product for both chassis and cabinet.
Parameter Specification
Dimension W=808mm, H=628mm and D=243mm Net Weight 21.7kg(47.7 ib) Chassis Plastic Material ABS (ABS HB / ABS VO / PC+ABS) External Plastic Chassis Components
Plastic Chassis, Cover, Stand, Lens and Button
Internal Plastic Cabinet Components
N/A
Exterior Chassis Color “Black” Pantone 4001 Chassis Component’s Color Difference
N/A (Only silver color on chassis)
Chassis Color Drift Due to UV-Light
The color drift due to UL-Light shall be less than 10 “Delta E” in the 1976 CIE L*a*b color space. Testing shall be performed according to the requirements of ASTM Test
Method D4459-93. Chassis Texture Front Bezel:N/A ; Back Cover:MT-11020 Molded Plastic Workmanship shall be inspected according to ViewSonic
Molded Plastic Parts Specification, VSCMPPSPEC001V1.2. Screen Printed Parts, Bird Logo Recess
Artwork shall be provided and confirmed by ViewSonic.
Rear Label A label identifying the product name, model/serial number
and FCC ID/Logo shall be placed into the rear label recess
located on the rear panel of the chassis. Wall- Mount 400mmx200mm VESA high hole (n=6),pattren 6mm,1.0
pitch x 10mm long screw mounting kit not imcluded.
(Figure 7)
Sample Sample of textured color chips, plastic material specification,
and Material Safety Data Sheets shall be submitted to
ViewSonic prior to Mass Production Release.
In addition, all exterior surfaces shall have uniform texture/color.The maximum acceptable gap between the buckets to bezel plastic pieces shall be within 1.5 mm. The maximum
acceptable gap between LCD panel and bezel shall be within 2.5 mm.
8. Environmental
Operating Temperature 0°C to +40°C
Storage Temperature -20°C to +60°C
Operating Relative Humidity 65% non-condensing
Storage Relative Humidity 85% non-condensing
Operating Altitude 0 to +3,000 meters above sea level
Storage Altitude 0 to +12,000 meters above sea level
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3. Front Panel Function Control Description
Front View of the Product
1 2 3 4 5
6
87
Volume Down
Decrease sound volume or adjust a highlighted control while in OSD menu.
Volume Up
Increase sound volume or adjust a highlighted control while in OSD menu.
Menu
T
urn OSD menu ON/OFF.
CH Down
C
hannel down when source is at TV or select a control while in OSD menu.
CH Up
Channel up when source is at
TV or select a control while in OSD menu.
ENTER
T
o highlight a control in OSD menu.
Power ON/OFF button Power LED Indicator / Remote Control Receiver
1
3
2
4
5
6
7
8
Note:
1. Press VOL+ and MENU buttons at the same time to lock power button, and press VOL+ and MENU buttons again to unlock it.
2. Press VOL- and VOL+ buttons at the same time to lock OSD menu, and press VOL- and VOL+ buttons again to unlock it.
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Rear View of the Product
Analog TV input
Connect to NTSC, PAL M/N TV source.
S-Video input
Connect this port to the S-Video output of A/V device.
AV/ S-Video signal Audio input (left/right)
Connect this port to the RCA audio output connectors of your A/V device.
YPbPr signal Audio input (left/right)
Connect this port to the RCA audio output connectors of your A/V device.
YPbPr signal input
Connect this port to the
YPbPr output of A/V device.
Composite Video input
Connect this port to the composite video output of A/V device.
Audio output
C
onnect this port to your A/V device with audio in (RCA) connectors or to audio amplifier.
PC Audio input
Connect this port to PC line out jack.
VGA signal input
Connect this port to the VGA output of your PC.
HDMI Input Terminal
Connect this port to the HDMI output of A/V device.
Headphone Jack
Connect this port to your headphone.
Power (AC input)
Using power cord provided, connect to a power source.
I
F
E
C
D
B
H
G
A
E
D
A
B C
F
G
I
H
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Remote Control
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ENGLISH
1 POWER Power ON/OFF
2
MTS Select Mono, Stereo or SAP in TV
3
INFO Display current information
4
SLEEP Set TV Sleep timer
5
SOUND Select sound modes
6
0~9, 100/- number button
Directly channel select
7
VOL+ and VOL- Adjust volume UP/DOWN
8
FAV.A/D To skip or restore Favorite Channels
9
UP/ DOWN/ LEFT/ RIGHT/ ENTER
UP/ DOWN/ LEFT/ RIGHT: Navigate and adjust OSD function ENTER: Enter the function setting
10
INPUT Input source select
11
ZOOM Adjust window size
12
FREEZE “Freeze-Frame” the current screen
13
P.POS Adjust sub-screen window position
14
P.SIZE Adjust sub-screen window size
15
MUTE Volume mute ON/OFF
16
TV Switch to TV when in any source
17
PICTURE Select picture modes
18
RETURN Return to previous channel
19
CH▲ and CH▼ Adjust Channel UP/DOWN
20
FAV. CH Select from preset Favorite Channels
21
MENU On Screen Display (OSD) menu ON/OFF
22
WIDE Change the image size
23
PIP/POP Toggle to enable/disable Picture in Picture/Picture Out of
Picture function
24
P.INPUT POP/PIP input source select
25
SWAP Switch between main screen and sub-screen
Note: PIP means Picture In Picture. POP means Picture Out Of Picture.
Remote control button function as follow
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ENGLISH
Video Menu — Adjusting the picture quality
Video Menu is active in all but the VGA input source.
Contrast: To adjust contrast of video. (right: Max, left: Min.)
Brightness: To adjust luminance of video. (right: Max, left: Min.)
Color: To adjust color. (right: brilliant color, left: pale color.)
Tint: To adjust tint level. (right: greenish tone, left: reddish tone.)
Sharpness: To adjust picture sharpness. (right: sharper, left: softer.) Note: To adjust the Video settings, Smart Picture must be set to the User mode. (Select through the Picture button on the remote control)
Audio Menu — To set the audio quality and status
Audio Menu is active in all but the VGA input source.
Bass: To adjust bass.
Treble: To adjust the treble.
Balance: To adjust left and right audio balance.
Surround: To enjoy a concert hall effect, select On when stereo is playing.
Audio Out: To control sound output ON/OFF from the RCA audio out connectors. Note: To adjust the Audio settings, Smart Sound must be set to the User mode. (Select through the Sound button on the remote control)
ADVANCED OPERATION — OSD MENU
OSD Functions
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ENGLISH
TV Menu — To set up for TV
It is only active in TV source.
Tuner Mode: To select Cable or Air as the TV source.
Auto Scan: To auto scan the TV channels. Press ENTER to start auto scanning TV channels. Press
ENTER again at any time to interrupt scanning.
TV: To select the TV channel to be skipped. Press ◄► to change channel.
Channel Add/Del.: Select Delete to skip the channel appointed, or select Add to restore the channel appointed.
Channel Edit: Press ENTER to edit a name for the channel appointed. Use ▲▼◄► to select the letters you want, and use
BackSpace key to delete backwards. Move the cursor
to
OK and then press ENTER to complete and save the channel name. To cancel editing,
choose
Cancel or exit without pressing OK.
Setup Menu — To set up OSD window
Setup Menu is active in all input sources.
Language: To select a OSD language from English, Portuguese or Spanish.
Parental: To set up parental control.
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ENGLISH
When you enter this control, the screen below will be displayed.
The factory default of the password is “0000”. To enable parental control, input the password, press ▼ button to focus on
OK key, and
press
ENTER. (select Cancel if you want to exit)
After entering, the following screen will be shown.
Channel Lock: To lock channels. Use ◄► to select the channel you want to lock, and then press
ENTER to lock or unlock it.
Change Password: To change the password, press ENTER and enter the password again.
Press
ENTER, and the following screen appears.
Enter the new password, use ▼ to move the cursor down, and then enter the new password again, press
OK to confirm or Cancel to exit. Note: Please make sure you remember your new password after changing, because you cannot recall the default setting of the password by any selection. Clear All: To clear all the locks set before, press
ENTER.
Press MENU to return to the previous page.
Color Temperature: To select the color temperature from Warm, Cold, Normal or User. (If you select User, you can adjust the degree of R, G, B in Color Temp. to suit your personal preference.)
Back Light: To adjust the luminance of the back light.
Aspect Ratio: To select image size between Normal, Full, Wide1, Wide2, Wide3, 4:3, 16:9, and No scale.
OSD Timeout: To setup the display time of OSD. (5, 15, 45, and 60 seconds)
Memory Recall: To restore the factory default settings.
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ENGLISH
PIP/POP
PIP/POP button allows you to watch two screens from different sources at the same time. (PIP is picture in picture; POP is picture out of picture) Press PIP/POP on the remote control repeatedly. The screen will change from normal screen → PIP screen → POP screen.
PIP Input Source Select
1. Press P.INPUT button to select input source for sub-screen as following.
VGA Menu — To set up for computer
It is only active in VGA sources.
Auto Adjust: Press ENTER to auto adjust picture’s horizontal position, vertical position, fine tune and H-Size.
Contrast: To adjust contrast of the video.
Brightness: To adjust luminance of the video.
Fine Tune: To adjust the delay time of data and clock to reduce noise in picture.
Manual Clock: To adjust the horizontal pixel clock of the video.
H Position: To adjust the horizontal position of the picture.
V Position: To adjust the vertical position of the picture
POP Screen PIP Screen
Main Screen Available Sub-Screen Input Source TV HDMI / YPbPr / VGA HDMI TV / YPbPr / AV / S-Video / VGA YPbPr TV / HDMI / AV / S-Video AV HDMI / YPbPr / VGA S-Video HDMI / YPbPr / VGA VGA TV / HDMI / AV / S-Video
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ENGLISH
PIP Size Select: Press P.SIZE to select the size of sub-screen. The function only acts on PIP.
PIP Position Select: Press P.POS to select the position of sub-screen. The function only
acts on PIP.
Note that the screen indexed with the pink frame is the screen you select to set up. Use ◄► to move the index between the main screen and the sub-screen.
Notes:Initial password:0000 If you forget your initial password,you can press"8866"to resume.
SWAP: Press SWAP to exchange main screen to sub-screen, including video and sound.
The function is available both in PIP and POP.
2. Use ◄► to select the sub-input source and press ENTER to confirm.
Note: To select the input source for main screen, press INPUT button.
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"MENU" Lock & Un-lock: Pressing "Vol+" and "Vol-" from Front Panel Keys. "POWER" Lock & Un-lock: Pressing "Vol+" and "MENU" from Front Panel Keys.
4. Circuit Description
A. Analog Switch and Video input.
MT8202 is a highly integrated video and audio single chip processor for emerging HDTV-Ready LCD TV. It includes one 3D/2D TV Decoder recovering the best image from CVBS, and in addition, its analog input also support popular S-Video, Component, VGA vi deo source. On-chip advanced motion adaptive de-interlacer (MDDitm) converts accordingly the interlace video into smooth non-flicking progressive motion pictures.
Analog switch is built in MT8202 and accept CVBS, YPbPr, S-Video, RGB signal directly to internal video front end. For most system application, there is no need to add external components to add analog video multiplexer on board.
The video ADC sample analog input signals. After ADC, all signal processing is digital domain.The source select multiplex all inputs from digital and analog video ports and route them into Main and PIP data path.
B. 3D comb filter, Video Decoder, Deinterlacer and Scaling controller.
MT8202 includes 3D comb filter TV decoder to retrieve the best image from popular composite signals. Embedded HDTV/VGA decoders let the high bandwidth input signals perfectly reproduced. 24/16/8 bits digital port may accept all kinds of external digital input video source. New 2nd generation advanced motion adaptive de-interlacer converts accordingly the interlace video into progressive one with overlay of a 2D Graphic processor. Advanced full function color processing with fu lly 10-bit path provides high quality video contents. Independent two Flexible scalers provide wide adoption to various LCD panels for two of different video sources at the same time. MT8202 supports alpha blending for Video and two OSD planes. It also supports 10bit gamma correction and advanced dithering processing for LCD display with 6/8/10 bit output.
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C. HDMI.
MT8293 is fully HDMI-compliant receiver that fits directly into home theater products such as LCD TVs, plasma TVs and HDTVs. The receiver is capable of supporting bandwidths up to 165 MHz and video resolutions up to 1080p and UXGA. The MT8293 supports the
DVD-Audio standard, including 7.1- surround audio at 96kHz and stereo audio at 192kHz.
The built-in High-bandwidth Digital Content Protection (HDCP) decryption engine secures the digital link for transmission of valuable high-definition v id eo and audio. Built-in HDCP
self-test engine simplifies manufacturing testing.
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MT8202
LCD Controller IC
MT8293
Digital audio interface
EEPROM for
EDID
EEPROM for
HDCP Key
HDMI
Conn
ector
12c interface
DVI
0~23,DE,Hsync,
Vsync,clk
CSDL,CSDA
PWR5V
DSDL,DSDA
KSDL,KSDA
12C interface
12C interface
CP10 interface
HDMI_HPD
TMDS0~3
HDMI_PLUG_POWER
MT8293 has 3 I2C interfaces. LCD Controller IC use the CSDL/CSDA interface to access MT8293 registers. MT8293 use KSDL/KSDA interface to read HDCP key from the EEPROM. HDMI transmitter use DSDL/DSDA to access MT8293 HDCP related register. HDMI Transmitter will pull high HDMI_PLUG_POWER (pin 18 in connector) when the cable is connected. LCD Controller will pull high HDMI_HPD (pin 19 in connector) to info the HDMI transmitter that the receiver is ready. The HDMI transmitter sends the video & audio to MT8293 via 3 Data TMDS pairs & 1 CLOCK TMDS pairs.
Digital video signals are directly output from the MT8293 and then transfer them to the
MT8202 for advanced processing.
D. Audio
MT8202 incorporates a on-chip audio processor decodes whole world standard audio signals from tuner with lip sync control, delivering high quality post-processed sound effect to
customers. Audio interface accept analog audio signal from Tuner, e.g. SIF or AF. It also includes preprocessing circuit to filter the noisy audio sign als. Audio decoder will decode the BTSC, and output best sound with enhanced 3D surround post-processing.
The AD12250 converts stereo single-ended analog input signals into 24-bit I2S digital audio data through on-chip anti-aliasing filter, multi-bit Σ-Δ modulator, decimation filter and high-pass filter which removes dc offsets. External analog audio signal , such as AV, S-video, etc. is directly fed into AD12250 via a audio switch and converted to I2S digital audio data. Digital audio, such as HDMI , have decoded by MT5351 and MT8293, is converted to I2S digital audio already. The I2S digital audio data is decoded and processed by MT8202, and then be delivered to AD8256 for audio amplifying.
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5. Adjusting Procedure
1. Function Test
1.1. Product
- 32” LCD TV
1.2. Test Equipment
-PC signal generator: CHROMA 2525 CARD ,CHROMA 2327 or 2329,Pioneer DV-S969AVi.
-TV and Video signal generator.
-Color analyzer: MINOLTA CA110.
-Power meter: CP-310A or CP-320A.
-AC power supply transformer: 110V/120V ±20% 60Hz ±5%.
-Digital ammeter
1.3. Test Condition
Before function test and alignment, each LCD TV should be run-in and warmed up for at least 30 minutes with the following conditions: (a) In room temperature, (b) With full-white screen, and 16 grey scale, (c) With cycled display modes.
1.4. Test Display Modes & Pattern
1.4.1 EEPROM INIT A. Timing: 1366*768@60Hz B. Pattern: 16*12 pane C. Press ’POWER’, ‘’and ‘ENTER’ at the same time, then go into the FACTORY
MODE.
Fig. 1 fig. 2
D. Figure 1,Select EEPROM INITIAL and press ENTER. The act of EEPROM INITIAL is
completed when EEPROM INIT disappeared.
1.4.2 COLOR TEMPERATURE ADJUSTING PC MODE:
A. Timing: 1360*768@60Hz. B. Pattern: 16 grey scale. C. LCD TV should be run-in and warmed up for at least 30 minutes. D. Make sure the distance between SENOR of the CA110 and the LCD TV is about
20cm.
E. Color Temperature adjusting.
1.Fig. 1: under the picture 16 grey scale of VGA source, select WHITE BALANCE and press ENTER, The color warm will auto adjust. The act of EHITE BALANCEL is completed when the picture is steady.
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2.After adjusting, switch to FULL WHITE and check the value of each color. Preset color for N3250W-L
x=0.283±0.015 y=0.298±0.015
3.Under the picture NTSC color bar of YPbPr source, select WHITE BALANCE and
press ENTER, The color warm will auto adjust. The act of EHITE BALANCEL is completed when EHITE BALANCEL disappeared.
4.After adjusting, switch to FULL WHITE and check the value of each color.
Preset color for N3250W-L
x=0.283±0.015 y=0.298±0.015
1.4.3 Power Consumption Check ( VGA MODE ) A. TIMING: 1360 x 768@60Hz B. Pattern: 1010UPRIGHTNESS PATTERN C. BRIGHTNESS=MAX, CONTRAST=MAX. D. The power that each MODE consumed is shown in Chart 1.
MODE
MAX POWER COMSUMED POWER LED COLOR
NORMAL
150W(max) for 27”
200W(max) for 32”
GREEN
Stand-by
3 W (max) RED
Chart 1
1.4.4 Check the position of the picture displayed and phase auto adjusting (VGA MODE). Depend on the TIMING of TIMING TABLE (TABLE 3) to switch MODE in order, stay about 10 seconds each MODE, it can changed and stored automatically each MODE. We can’t switch over to the next MODE until AUTO ADJUST disappears.
1.4.5 HDMI MODE FUNCTION TEST A.DVI MODE: Depend on the TIMING of TIMING TABLE (TABLE 3 ) to check MODE in order. B.HDMI MODE: make sure the 480i, 480p,720p, 1080i TIMING is right.
1.4.6 OSD FUNCTION TEST A. Time: 1360x768@60Hz B. Pattern: 16*12 pane C. Make sure that Each FUNCTION has one right action.
1.4.7 YPbPr, S-VIDEO, AV, TVS FUNCTION TEST
A. Input YPbPr, S-VIDEO, AV , TV’s signal and check. B. Input USA air channel (TABLE 1) and USA CATV channel for TV channel. C. Under YPbPr MODE, Make sure the 408i, 480P, 720P, 1080i is right.
1.4.8 AUDIO FUNCTION TEST
A. Audio input includes PC AUDIO IN, S-VIDEO/AV AUDIO IN and YPbPr AUDIO IN. B. Under PC MODE, input PC AUDIO signal, checks whether the action of AUDIO IN is
right.
C. Under S-VIDEO/AV MODE, input L/R AUDIO signal, checks whether the action of
AUDIO IN is right.
D. Under YPbPr MODE, input L/R AUDIO signal, checks whether the action of AUDIO IN
is right.
E. Under HDMI MODE, checks whether the action of AUDIO IN is right.
F. AUDIO OUT FUNCTION TEST: Under all patterns except PC pattern, The Audio output meets active extra speaker, examines whether the extra speaker makes the sound.
1.4.9 EARPHONE FUNCTION TEST
Under PC MODE, input PC AUDIO signal, determines whether the action of INT
SPEAKER output is right. Meets earphone with the EARPHONE, Determined whether the action of EARPHONE output is normal.
1.4.10 All Modes Reset After final QC step, we must to erase all saved changes again and restore the factory defaults.
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You should do “All Mode Reset” again. Turn off the LCD TV by pressing “Power” button.
TV Frequency Table:
U.S.A Channel (TABLE 1)
VIF 45.75 MHz, SIF 41.25 MHz
(UnitMHz)
Ch. Freq.range fp (picture) fs (sound) fosc Ch. Freq.range fp (picture) fs (sound) fosc
2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
54 – 60 60 – 66 66 – 72 76 – 82
82 – 88 174 – 180 180 – 186 186 – 192 192 – 198 198 – 204 204 – 210 210 – 216 470 – 476 476 – 482 482 – 488 488 – 494 494 – 500 500 – 506 506 – 512 512 – 518 518 – 524 524 – 530
530– 536 536 – 542 542 – 548 548 – 554 554 – 560 560 – 566 566 – 572 572 – 578 578 – 584 584 – 590 590 – 596 596 – 602 602 – 608 608 – 614 614 – 620 620 – 626 626 – 632 632 – 638 639 – 644
55.25
61.25
67.25
77.25
83.25
175.25
181.25
187.25
193.25
199.25
205.25
211.25
471.25
477.25
483.25
489.25
495.25
501.25
507.25
513.25
519.25
525.25
531.25
537.25
543.25
549.25
555.25
561.25
567.25
573.25
579.25
585.25
591.25
597.25
603.25
609.25
615.25
621.25
627.25
633.25
639.25
59.75
65.75
71.75
81.75
87.75
179.75
185.75
191.75
197.75
203.75
209.75
215.75
475.75
481.75
487.75
493.75
499.75
505.75
511.75
517.75
523.75
529.75
535.75
541.75
547.75
553.75
559.75
565.75
571.75
577.75
583.75
589.75
595.75
601.75
607.75
613.75
619.75
625.75
631.75
637.75
643.75
101.00
107.00
113.00
123.00
129.00
221.00
227.00
233.00
239.00
245.00
251.00
257.00
517.00
523.00
529.00
535.00
541.00
547.00
553.00
559.00
565.00
571.00
577.00
583.00
589.00
595.00
601.00
607.00
613.00
619.00
625.00
631.00
637.00
643.00
649.00
655.00
661.00
667.00
673.00
679.00
685.00
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
644 – 650 650 – 656 656 – 662 662 – 668 668 – 674 674 – 680 680 – 686 686 – 692 692 – 698 698 – 704 704 – 710 710 – 716 716 – 722 722 – 728 728 – 734 734 – 740 740 – 746 746 – 752 752 – 758 758 – 764 764 – 770 770 – 776 776 – 782 782 – 788 788 – 794 794 – 800 800 – 806
645.25
651.25
657.25
663.25
669.25
675.25
681.25
687.25
693.25
699.25
705.25
711.25
717.25
723.25
729.25
735.25
741.25
747.25
753.25
759.25
765.25
771.25
777.25
783.25
789.25
795.25
801.25
649.75
655.75
661.75
667.75
673.75
679.75
685.75
691.75
697.75
703.75
709.75
715.75
721.75
727.75
733.75
739.75
745.75
751.75
757.75
763.75
769.75
775.75
781.75
787.75
793.75
799.75
805.75
691.00
697.00
703.00
709.00
715.00
721.00
727.00
733.00
739.00
745.00
751.00
757.00
763.00
769.00
775.00
781.00
787.00
793.00
799.00
805.00
811.00
817.00
823.00
829.00
835.00
841.00
847.00
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U.S.A. CATV (TABLE 2) VIF 45.75 MHz, SIF 41.25 MHz
(Unit:MHz)
Ch. Freq.range fp
(picture)
fs (sound) fosc Ch. Freq.range fp
(picture)
fs
(sound)
fosc
2 3 4
5A
5
6 A-5 A-4 A-3 A-2 A-1
A
B
C
D
E
F
G
H
I 7 8 9
10
11 12 13
J K L
M
N O P Q R S T U V
W
AA
BB CC
DD
EE
FF GG HH
II
2 3 4 1 5
6 95 96 97 98 99 14 15 16 17 18 19 20 21 22
7
8
9 10 11 12 13 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
54 – 60 60 – 66 66 – 72 72 – 78 76 – 82 82 – 88 90 – 96
96 – 102 102 – 108 108 – 114 114 – 120 120 – 126 126 – 132 132 – 138 138 – 144 144 – 150 150 – 156 156 – 162 162 – 168 168 – 174 174 – 180 180 – 186 186 – 192 192 – 198 198 – 204 204 – 210 210 – 216 216 – 222 222 – 228 228 – 234 234 – 240 240 – 246 246 – 252 252 – 258 258 – 264 264 – 270 270 – 276 276 – 282 282 – 288 288 – 294 294 – 300 300 – 306 306 – 312 312 – 318 318 – 324 324 – 330 330 – 336 336 – 342 342 – 348 348 – 354
55.25
61.25
67.25
73.25
77.25
83.25
91.25
97.25
103.25
109.25
115.25
121.25
127.25
133.25
139.25
145.25
151.25
157.25
163.25
169.25
175.25
181.25
187.25
193.25
199.25
205.25
211.25
217.25
223.25
229.25
235.25
241.25
247.25
253.25
259.25
265.25
271.25
277.25
283.25
289.25
295.25
301.25
307.25
313.25
319.25
325.25
331.25
337.25
343.25
349.25
59.75
65.75
71.75
77.75
81.75
87.75
95.75
101.75
107.75
113.75
119.75
125.75
131.75
137.75
143.75
149.75
155.75
161.75
167.75
173.75
179.75
185.75
191.75
197.75
203.75
209.75
215.75
221.75
227.75
233.75
239.75
245.75
251.75
257.75
263.75
269.75
275.75
281.75
287.75
293.75
299.75
305.75
311.75
317.75
323.75
329.75
335.75
341.75
347.75
353.75
101.00
107.00
113.00
119.00
123.00
129.00
137.00
143.00
149.00
155.00
161.00
167.00
173.00
179.00
185.00
191.00
197.00
203.00
209.00
215.00
221.00
227.00
233.00
239.00
245.00
251.00
257.00
263.00
269.00
275.00
281.00
287.00
293.00
299.00
305.00
311.00
317.00
323.00
329.00
335.00
341.00
347.00
353.00
359.00
365.00
371.00
377.00
383.00
389.00
395.00
JJ
KK
LL
MM
NN OO
PP QQ RR
SS
TT UU VV
WW
AAA
BBB CCC
DDD
EEE
46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94
354 – 360 360 – 366 366 – 372 372 – 378 378 – 384 384 – 390 390 – 396 396 – 402 402 – 408 408 – 414 414 – 420 420 – 426 426 – 432 432 – 438 438 – 444 444 – 450 450 – 456 456 – 462 462 – 468 468 – 474 474 – 480 480 – 486 486 – 492 492 – 498 498 – 504 504 – 510 510 – 516 516 – 522 522 – 528 528 – 534 534 – 540 540 – 546 546 – 552 552 – 558 558 – 564 564 – 570 570 – 576 576 – 582 582 – 588 588 – 594 594 – 600 600 – 606 606 – 612 612 – 618 618 – 624 624 – 630 630 – 636 636 – 642 642 – 648
355.25
361.25
367.25
373.25
379.25
385.25
391.25
397.25
403.25
409.25
415.25
421.25
427.25
433.25
439.25
445.25
451.25
457.25
463.25
469.25
475.25
481.25
487.25
493.25
499.25
505.25
511.25
517.25
523.25
529.25
535.25
541.25
547.25
553.25
559.25
565.25
571.25
577.25
583.25
589.25
595.25
601.25
607.25
613.25
619.25
625.25
631.25
637.25
643.25
359.75
365.75
371.75
377.75
383.75
389.75
395.75
401.75
407.75
413.75
419.75
425.75
431.75
437.75
443.75
449.75
455.75
461.75
467.75
473.75
479.75
485.75
491.75
497.75
503.75
509.75
515.75
521.75
527.25
533.75
539.75
545.75
551.75
557.75
563.75
569.75
575.75
581.75
587.75
593.75
599.75
605.75
611.75
617.75
623.75
629.75
635.75
641.75
647.75
401.00
407.00
413.00
419.00
425.00
431.00
437.00
443.00
449.00
455.00
461.00
467.00
473.00
479.00
485.00
491.00
497.00
503.00
509.00
515.00
521.00
527.00
533.00
539.00
545.00
551.00
557.00
563.00
569.00
575.00
581.00
587.00
593.00
599.00
605.00
611.05
617.00
623.00
629.00
635.00
641.00
647.00
653.00
659.00
665.00
671.00
677.00
693.00
689.00
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1.5. TV receiving test:
1.5.1 TV SIGNAL TEST ITEM
CENTRALISM TRANSMITTING SIGNAL CHECK CONTENT
SET CONTENT
CHANNEL
ORDER
FREQUENCY
(MHz)
PATTERN SOUND P/S(dB)
CHECK
CONTENT
CHANNEL 2
55.25 MONO SCOPE SWEEP TONE -10 ELECTRIC ABNORMITY SOUND
CHANNEL 6
83.25 COLOR BAR 400Hz -10 SOUND ,PICTURE
CHANNEL 7
175.25 Full White (100 IRE)
STEREO -10 STERO FUNCTION
CHANNEL 13
211.25 STAIR DUAL -10 SUB FUNCTION
CHANNEL 14
471.25 MULTIBURST MONO -16 IMAGE AND SOUND
DISTURB
CHANNEL 36
603.25 MULTIBURST MONO -10 TEST Close-caption T1
FUNCTION
CHANNEL 69
801.25 MONO SCOPE MONO(1KHz) -10 NOISE LIMMITTED
SENSITIVITY
TV TEST METHOD
A.CHANNEL2 Examines sound by ear, whether the sound does have mechanical resonation and the electrical unusual sound, and image to sound disturbance. B.CHANNEL6: Check sound and picture. C.CHANNEL7: Examines whether the sound does receive the image disturbance, Judgment basis: Whether there is unusual sound, input signal LEVEL<=36dBu,and STEREO SENSITIVITY is normal. D.CHANNEL13: Under main/sub/main-sub mode, check sub function. E.CHANNEL14: Examines whether the sound does receive the image disturbance, Judgment basis: Whether there is unusual sound. F. CHANNEL 36:Check T1 of close-caption. Input signal level<=45dBu. G.CHANNEL 69: Adjustment attenuator, If the critical point of the change of the image signal to noise ratio is under LEVEL<=60dBu, regards as normally.
PRODUCTS OUTPUT CHECK ITEM.
A. The same as " CENTRALISM TRANSMITTING SIGNAL CHECK CONTENT" B. saturation TEST, inputs the TV signal, the input signal LEVEL establishment most greatly is
90dBu,check whether CONTRAST of the image is normal; Whether appears the disturbance phenomenon.
C.AFT CHECK,
(1) The frequency of the input TV signal is 211.25MHz (CH13), after confirmed the TV set receives
this signal, closure radio station; Then set frequency of the TV signal generator to be 212.25MHz, turn on the TV set and check whether the TV set receives the signal of CH13.
(2). The frequency of the input TV signal is 211.25MHz (CH13), after confirmed the TV set receives
this signal, closure radio station; Then set frequency of the TV signal generator to be 212.00MHz, turn on the TV set and check whether the TV set receives the signal of CH13.
(3). After all of FUNCTION TEST completed, we must erase all saved changes again and restore the
factory defaults.
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TIMING TABLE (FACTORY PRESET MODE) (TABLE 3)
ITEM
1 2 3 4
TIMING
640*480@60HZ 640 *480@75HZ 800 *600@60HZ 800*600@75HZ
Pixel Rate
25.175MHZ 31.500MHZ 40.000MHZ 49.500MHZ
H TOT AL
31.778us 26.667us 26.400us 21.333us
H DISPLAY
25.422us 20.317us 20.000us 16.162us
H B-Porch
1.907us 3.810us 2.200us 3.232us
H Width
3.813us 2.032us 3.200us 1.616us
H Border
0.318us 0.000us 0.000us 0.000us
V TOTAL
16.683ms 13.334ms 16.579ms 13.333ms
V DISPLAY
15.253ms 12.800ms 15.840ms 12.800ms
V B-Porch
1.049ms 0.427ms 0.607ms 0.448ms
Vs Width
0.064ms 0.080ms 0.106ms 0.064ms
V Border
0.254ms 0.000ms 0.000ms 0.000ms
H/V Sync
-/- -/- +/+ +/+
Interlace
No. No. No. No.
ITEM
5 6 7 8
TIMING
1024 ×768 60HZ 1024 ×768 75HZ 1280 ×720 60HZ 1280 ×768 60HZ
Pixel Rate
65.000MHZ 78.750MHZ 74.250MHZ 65.000MHZ
H TOT AL
20.677us 16.660us 22.222us 20.677us
H DISPLAY
15.754us 13.003us 17.239us 15.754us
H B-Porch
2.462us 2.235us 2.936us 2.462us
H Width
2.092us 1.219us 1.007us 2.092us
H Border
0.000us 0.000us 0.000us 0.000us
V TOTAL
16.666ms 13.328ms 16.667ms 16.666ms
V DISPLAY
15.880ms 12.795ms 16.000ms 15.880ms
V B-Porch
0.600ms 0.466ms 0.444ms 0.600ms
Vs Width
0.124ms 0.050ms 0.111ms 0.124ms
V Border
0.000ms 0.000ms 0.000ms 0.000ms
H/V Sync
-/- +/+ -/- -/-
Interlace
No. No. No. No.
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TIMING TABLE (FACTORY PRESET MODE) (TABLE 3)
ITEM
9 10 11 12
TIMING
1360 ×768 60HZ 1280 ×1024 60HZ
Pixel Rate
85.5MHZ 108MHZ
H TOTAL
20.959us 15.630us
H DISPLAY
15.906us 11.852us
H B-Porch
2.994us 2.296us
H Width
1.310us 1.037us
H Border
0.000us 0.000us
V TOTAL
16.662ms 16.661ms
V DISPLAY
16.097ms 16.005ms
V B-Po rch
0.377ms 0.594ms
Vs Width
0.126ms 0.047ms
V Border
0.00ms 0.00ms
H/V Sync
+/+ +/+
Interlace
No. No.
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