TFT Colour LCD Module: Active display area – 23.8inch
Disassembly
Place the monitor face Down on the cushion or soft cloth.
Remove the stand body and base from the product.
1. Pull the front cover
upward.
2. Then, let the all latches are separated.
3. Put the front face down.
Disassemble back cover.
Block diagram
Video Controller Part.
This
part amplifies the level of video signal for the digital conversion and
converts from the analog video signal to the digital video signal using a pixel
clock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 28MHz to 148MHz in 24EA53V case
This part consists of the Scaler, ADC convertor, TMDS receiver and LVDS
transmitter.
The Scaler gets the video signal converted analog to digital, interpolates
input to 1920 X
1080 resolution signal and outputs 8-bit R, G, B signal to transmitter.
Power Part.
This
part consists of one regulator convert power from 19V to 5V.19V is provided by
adapter.
5V is provided for LCD panel.
Also, 5V is converted 3.3V by regulator. Converted Power is provided for IC in the main board.
Boost converter of LED block converters 19V to 47.3V and operates back-light LED strings of module in 24EA53V case.
MICOM Part.
This
part is include video controller part. And this part consists of Flash IC which
stores control data and the Micom.
The Micom distinguishes polarity and frequency of the H/V sync is supplied from
signal cable.
The controlled data of each mode is stored in.
EMI components.
1.This part contains of EMI components to comply with global marketing EMI standards
like FCC,VCCI CISPR, the circuit included a line-filter, across line capacitor
and of course the primary protection fuse.
2. Input rectifier and filter.
This part function is for transfer the input AC voltage to a DC voltage through
a bridge rectifier and a bulk capacitor.
3. Energy Transfer.
This part function is for transfer the primary energy to secondary through a
power transformer.
4. Output rectifier and filter.
This part function is to make a pulse width modulation control and to provide
the driver signal to power switch, to adjust the duty cycle during different AC
input and output loading condition to achieve the dc output stabilized, and also
the over power protection is also monitor by this part.
5. Photo-Coupler isolation.
This part function is to feed back the DC output changing status through a
photo transistor to primary controller to achieve the stabilized DC output
voltage.
6. Signal collection.
This part function is to collect the any change from the DC output and feed
back to the primary through photo transistor.
7. LED driver block
This part function is to drive LED Back light.
ADJUSTMENT
Windows EDID V1.0 User
Manual
Operating System: MS Windows 98, 2000, XP
Port Setup: Windows 98 => doesn’t need setup
Windows 2000, XP => Need to Port Setup.
This program is available for LCD Monitor only.
1. Port Setup
a) Copy “UserPort.sys” file to “c:\WINNT\system32\drivers” folder
b) Run Userport.exe
c) Remove all default
number
d) Add 300-3FF
e) Click Start button.
f) Click Exit button.
2. EDID Read & Write
1)
Run WinEDID.exe
2) Edit Week of
Manufacture, Year of Manufacture,
Serial Number
a) Input User Info Data
b) Click “Update” button
c) Click “ Write” button
Service mode
Turn off the power switch at the right side of the display.
2) Wait for about 5 seconds and press MENU, POWER switch for 1 second interval.
3) The SVC OSD menu contains additional menus that the User OSD menu as
described below.
a)
CLEAR ETI : To initialize using time.
c) Auto Colour: W/B balance and automatically sets the gain and offset value.
(press key for over 3 sec)
d) AGING : Select Aging mode(on/off).
b) Module: To select applied module.
d) NVRAM INIT : EEPROM initialize.(24C16, press key for over 3 sec)
e) R/G/B-9300K : Allows you to set the R/G/B-9300K value manually.
f) R/G/B-6500K : Allows you to set the R/G/B-6500K value manually.
g) R/G/B-Offset : Allows you to set the R/G/B-Offset value manually.(Analog
Only)
h) R/G/B-Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only)
Schematic
