Text preview for : 14_Reference Infomation.pdf part of SAMSUNG LS17MJVKS Service Manual
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14 Reference Infomation
14 Reference Infomation
14-1 Technical Terms
-TFT-LCD Thin film Transistor Liquid Crystal Display -FINE The "Fine" adjustment is used to adjust visibility by controlling phase difference.
-ADC(Analog to Digital Converter) This is a circuit that converts from analog signal to digital signals.
-COARSE This adjustment adjusts the display by tuning Video clock and PLL clock.
-PLL(Phase Locked Loop) During progressing ADC, Device makes clock synchronizing HSYNC with Video clock
-L.V.D.S.(Low Voltage Differential Signaling) A kind of transmission method for Digital. It can be used from Main PBA to Panel.
-Inverter Device that supplies Power to LCD panel lamp. This device generates about 1,500~2,000V.
AC Adapter Device that converts AC(90V~240V) to DC(+12V or 14V)
-DDC(Display data channel) It is a communication method between a Host Computer and related equipment. It enables Plug and Play between PC and Monitor.
-SMPS(Switching Mode Power Supply) Switching Mode Power supply. This design technol- ogy is used to step up/down the input power by switching on/off
-EDID Extended Display Identification Data PC can recog- nize monitor information, such as Product data, Product name, Display mode, Serial number, Signal source, etc. Data is recognized via DDC Line linking PC and Monitor.
-FRC(Frame Rate Controller) Technology that changes the number of frames dis- played on screen per second. TFT-LCD panel requires 60 frames per second. This technology is needed to convert input image to 60 frames per second regardless input frame quan- tity.
-Dot Pitch The image on a monitor is composed of red, green and blue dots. The closer the dots, the higher the resolution. The distance between two dots of the same color is called the 'Dot Pitch'. Unit: mm
-Image Scaler Technology that convert various input resolution to other resolution.(ex. 640* 480 to 1024*768)
-Auto Configuration(Auto adjustment) This is an algorithm to adjust monitor to optimum condition by pushing one key.
-Vertical Frequency The screen must be redrawn several times per sec- ond in order to create and display an image for the user. The frequency of this repetition per second is called Vertical Frequency or Refresh Rate. Unit: Hz Example: If the same light repeats itself 60 times per second, this is regarded as 60 Hz. -Horizontal Frequency The time to scan one line connecting the right edge to the left edge of the screen horizontally is called Horizontal Cycle. The inverse number of the Horizontal Cycle is called Horizontal Frequency. Unit: kHz
-OSD(On Screen Display) Customers can easily control the screen settings using the OSD.
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14 Reference Infomation -Interlace and Non-Interlace Methods Showing the horizontal lines of the screen from the top to the bottom in order is called the NonInterlace method while showing odd lines and then even lines in turn is called the Interlace method. The Non- Interlace method is used for the majority of monitors to ensure a clear image. The Interlace method is the same as that used in TVs. -Plug & Play This is a function that provides the best quality screen for the user by allowing the computer and the monitor to exchange information automatically. This monitor follows the international standard VESA DDC for the Plug & Play function.
-Resolution The number of horizontal and vertical dots used to compose the screen image is called 'resolution'. This number shows the accuracy of the display. High resolution is good for performing multiple tasks as more image information can be shown on the screen. Example: If the resolution is 1280 x 1024 , this means the screen is composed of 1280 horizontal dots (horizontal resolution) and 1024 vertical lines (vertical resolution).
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14 Reference Infomation
14-2 Connecting the monitor
1. Connect the power cord for your monitor to the power port on the back of the monitor. Plug the power cord for the monitor into a nearby outlet. 2-1. Using the D-sub (Analog) connector on the video card. Connect the signal cable to the 15-pin, D-sub connector on the back of your monitor.
2-2. Connected to a Macintosh. Connect the monitor to the Macintosh computer using the D-SUB connection cable. 2-3. In the case of an old model Macintosh, you need to connect the monitor using a special Mac adapter. 3. Turn on your computer and monitor. If your monitor displays an image, installation is complete.
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14 Reference Infomation
14-3 Pin Assignments
Sync Type Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 15-Pin D-Sub Signal Cable Connector Separate Red Green Blue NC DDC Return (GND) GND-R GND-G GND-B NC Cable Detect NC Bi-Dr Data (SDA) H-Sync. V-Sync. DDC Clock (SCL) Sync-on-green Red Green + H/V Sync. Blue NC DDC Return (GND) GND-R GND-G GND-B NC Cable Detect NC Bi-Dr Data (SDA) Not Used Not Used DDC Clock (SCL)
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14 Reference Infomation
14-4 Timing Chart
- This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals. Table 1 Timing Chart
No
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Name
IBM 640*350/70Hz IBM 720*400/70Hz IBM 640*480/60Hz MAC 640*480/67Hz VESA 640*480/72Hz VESA 640*480/75Hz VESA 800*600/56Hz VESA 800*600/60Hz VESA 800*600/72Hz VESA 800*600/75Hz MAC 832*624/75Hz VESA 1024*768/60Hz VESA 1024*768/70Hz VESA 1024*768/75Hz VESA 1152*864/75Hz MAC 1152*870/75Hz VESA 1280*1024/60Hz VESA 1280*1024/75Hz
Timing ID
640*350/70Hz 720*400/70Hz 640*480/60Hz 640*480/67Hz 640*480/72Hz 640*480/75Hz 800*600/56Hz 800*600/60Hz 800*600/72Hz 800*600/75Hz 832*624/75Hz 1024*768/60Hz 1024*768/70Hz 1024*768/75Hz 1152*864/75Hz 1152*870/75Hz 1280*1024/60Hz 1280*1024/75Hz
dot_clk (MHz)
25.175 28.322 25.175 30.240 31.500 31.500 36.000 40.000 50.000 49.500 57.284 65.000 75.000 78.750 108.000 100.000 108.000 135.000
h_freq (kHz)
31.469 31.469 31.469 35.000 37.861 37.500 35.156 37.879 48.077 46.875 49.726 48.363 56.476 60.023 67.500 68.681 63.981 79.976
v_freq (Hz)
70 70 60 66.7 72 75 56 60 72 75 75 60 70 75 75 75 60 75
Separate Sync
H/V Composite Sync
Video C D E
Video Q R S
Sync-on-Green
Sync B A Sync P O
A : Line time total C : Back porch E : Front porch
B : Horizontal sync width D : Active time
O : Frame time total Q : Back porch S : Front porch
P : Vertical sync width R : Active time
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14 Reference Infomation
14-5 Preset Timing Modes
- If the signal transferred from the computer is the same as the following Preset Timing Modes, the screen will be adjusted automatically. However, if the signal differs, the screen may go blank while the power LED is on. Refer to the video card manual and adjust the screen as follows.
Horizontal Frequency The time to scan one line connecting the right edge to the left edge of the screen horizontally is called Horizontal Cycle and the inverse number of the Horizontal Cycle is called Horizontal Frequency. Unit: kHz
Vertical Frequency Like a fluorescent lamp, the screen has to repeat the same image many times per second to display an image to the user. The frequency of this repetition is called Vertical Frequency or Refresh Rate. Unit: Hz
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14 Reference Infomation
14-6 Panel Description
Maker
INL CPT
VENDOR P/N 631102071830r 631102070680r
PANEL_CODE
PANEL_ABB
STICKER_CODE
Remarks LCD PANEL 17" MT170EN01 LCS PANEL 17" CLAA170EA07Q(CPT)
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14 Reference Infomation
Memo
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