AOC VS19X Series User manual

HP VS19X Service Manual
SERVICE MANUAL
19” LCD Monitor
VS19X Series
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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Table of Contents
Table of Contents ---------------------------------------------------------------------------------- 02
Revision List ---------------------------------------------------------------------------------------- 04
1.Product Feature --------------------------------------------------------------------------------05
2.LCD Monitor Description -----------------------------------------------------------------------06
3.Operation Instructions --------------------------------------------------------------------------07
3.1 General Instructions -----------------------------------------------------------------------07
3.2 Control Button -------------------------------------------------------------------------------07
3.3 Adjusting The Picture ------------------------------------------------------------------------09
4. Input/Output Specification ---------------- --------------------------------------------------- 10
4.1 Input Signal Connector -------------------------------------------------------------------10
4.2 Factory Preset Display Modes ----------------------------------------------------------11
4.3 Power Supply Requirements ------------------------------------------------------------11
5.Panel Specification ----------------------------------------------------------------------------12
5.1 General Feature ----------------------------------------------------------------------------12
5.2 Optical Characteristics --------------------------------------------------------------------13
6. Block Diagram -----------------------------------------------------------------------------------14
6.1 Monitor Exploded View ------------------------------------------------------------------14
6.2 Software Flow Chart -----------------------------------------------------------------------15
6.3 Electrical Block Diagram ------------------------------------------------------------------16
6.3.1 Scalar Board ---------------------------------------------------------------------------16
6.3.2 Inverter/Power Board ----------------------------------------------------------------17
7. Schematic -----------------------------------------------------------------------------------------20

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7.1 Main Board -----------------------------------------------------------------------20
7. 2 Audio Board ----------------------------------------------------------------------27
7. 3 Power Board ---------------------------------------------------------------------28
8. PCB Layout ---------------------------------------------------------------------------------------31
8.1 Main Board -----------------------------------------------------------------------------------31
8.2 Power Board ---------------------------------------------------------------------------------32
8.3 Keypad Board -------------------------------------------------------------------------------33
9. Maintainability ------------------------------------------------------------------------------------33
9.1 Equipments and Tools Requirements -------------------------------------------------33
9.2 Trouble Shooting ---------------------------------------------------------------------------34
9.2.1 Main Board ------------------------------------------------------------------------34
9.2.2 Power/Inverter Board -------------------------------------------------------------37
9.2.3 Key Pad Board -----------------------------------------------------------------------39
10. White-Balance, Luminance Adjustment ----------------------------------------------- 40
11.Check List after replacing LCD Main board-------------------------------------------------41
12. EDID Content -----------------------------------------------------------------------------------45
13. BOM List ----------------------------------------------------------------------------------46～61
13.1 T982KH4DBHHAA -----------------------------------------------------------------46～61

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Revision List
Revision Date Change Description
A00 Nov-20-05 Initial release

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Product Feature
LCD Panel
Driving system TFT Color LCD
Panel M190EN04 V5
Size 48.3cm(19.0")
Pixel pitch 0.294mm( H )x 0.294mm( V )
Viewable angle 140˚(H) 130˚(V)
Response time (typ.) 16 ms
Brightness 250
Contrast 400:1
Video Analog /Digital
Input
Sync. Type H/V TTL
H-Frequency 30kHz – 83kHz
V-Frequency 50-76Hz
Display Colors Over 16 million Colors
Dot Clock 140MHz
Max. Resolution 1024 x768
Plug & Play VESA DDC2BTM
Power Consumption
ON Mode <45W
OFF Mode <1W
Maximum Screen Size Horizontal : 300mm
Vertical : 220 mm
Power Source 100~240VAC,47~63Hz
Environmental
Considerations
Operating Temp: 5°C to 35°C
Storage Temp.: -20°C to 60°C
Operating Humidity : 20% to 80%
Main Dimensions
Packaged(W*H*D) 525mm*175mm*535mm
Unpackaged(W*H*D) 426mm*423mm*204mm
Weight (N. W.)
Packaged 6.8Kg Unit
Unpackaged 5.3Kg Unit

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2. LCD Monitor Description
The LCD Monitor will contain main board, power board, key board, Audio board and which house the flat panel control
logic, brightness control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each
voltage.
Power Board
Flat Panel and
CCFL backlight
Main Board
Keyboard
RS232 Connector
For white balance
adjustment in
factory mode
HOST Computer
CCFT Drive.
AC-IN
100V-240V Video signal, DDC
Monitor Block Diagram
Audio board

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3. OPERATION INSTRUCTIONS
3.1 General Instructions
The control buttons are located at the left side of monitor, and press the power button to turn the monitor on or off. By
changing these settings, the picture can be adjusted to your personal performance.
-The power cord should be connected and insert to adaptor.
-Connect the video cable from the monitor to the computer VGA card.
-Press the power button to turn on the monitor, the power indicator will light up to Green.
3.2 Control Buttons
CONTROL BUTTONS

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3.3 Adjust The Picture
1.
Brightness
Adjust the brightness.
2. Contrast Adjust the contrast
3. Image Control
Adjust the:
zAuto Adjustment: Adjusts the main settings and produces a stable, centered
image.
zH-Position: horizontal position of the screen image.
zV-Position: vertical position of the screen image.
zClock: frequency of the pixel clock to minimize vertical bar.
zPhase: phase value to minimize horizontal jitters.
4. Volume Adjust the volume
5. Color
z9300K: recall 9300K color
z6500K: recall 6500K color
zSRGB: recall SRGB color
zCustom Color: adjusts the color tint of white, and the red, green, and blue (RGB)
mix for colors.
6. Language Shows the language of the OSD window.
7. Management
zPower Saver: enable/disable power saving
zPower On Recall: enable/disable power recall
zMode Display: enable/disable mode display
zSleep Timer: set sleep timer
zBasic Menu: set to basic menu
8. OSD Control OSD (on Screen Display) settings: adjusts the H/V position, timeout, On Screen
Display window.
9. Information Current setting, recommended setting, serial number, total hours, backlight hours, Exit.
10. Factory Reset Resets the display to original factory settings for color, brightness, phase, and clock.
11. Exit Exit the current OSD window.

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4. Input/Output Specification
4.1 Input Signal Connector
PIN MNEMONIC SIGNAL
1 RV Red Video
2 GV Green Video
3 BV Blue Video
4 NC
PC Connect detection
5 GND Ground (DDC Return)
6 RG Red GND
7 GG Green GND
8 BG Blue GND
9 +5 V +5 V (from PC)
10 SG Sync Ground
11 NC None
12 SDA DDC Data
13 HS Horizontal Sync
14 VS Vertical Sync
15 SCL DDC Clock
VGA connector layout
PIN 1 PIN 5
PIN 11