AOC i2252VWH User manual

ServiceManual AOCi2252VW
1
LCD 显示器维修手册
Custom：AOC
Model：i2252VWH
本手册适用于主板为 715G4641，Scalar IC NT68677
This manual applies to mainboard715G4641，Scalar IC NT68677

ServiceManual AOCi2252VW
2
REVISION LIST
Version Release Date Revision
History Model TPV Model No Editor
A00 Aug-18-2011 Initial Release AOCi2252VWH HIBGNZ6BAXK2DNJ TPV-BJ-Rainsun

ServiceManual AOCi2252VW
3
CONTENTS
1. LCD Specifications ................................................................................................................................................ 4
1.1 Product Features............................................................................................................................................... 4
1.2 Factory preset modes ....................................................................................................................................... 5
1.3 New Features ................................................................................................................................................... 5
1.4 VGA 15pin Connector ..................................................................................................................................... 6
1.5 DVI Connector................................................................................................................................................. 6
1.6 HDMI interface................................................................................................................................................ 7
2. Operation instruction.............................................................................................................................................. 8
2.1 Connection....................................................................................................................................................... 8
2.2 Control Buttons................................................................................................................................................ 8
2.3 OSD User mode adjustment............................................................................................................................. 9
2.4 OSD Locked................................................................................................................................................... 13
3. Panel Feature........................................................................................................................................................ 14
3.1 General Specifications ................................................................................................................................... 14
3.2 Electrical Absolute Ratings............................................................................................................................ 14
3.3 Electrical Characteristics................................................................................................................................ 15
3.4 TFT LCD Module Block Diagram................................................................................................................. 15
3.5 LCD module input terminal pin assignment.................................................................................................. 16
3.6 LED connector Interface................................................................................................................................ 16
4.Block Diagram ...................................................................................................................................................... 17
4.1 LCD Block Diagram...................................................................................................................................... 17
4.2 MainBoard Block Diagram............................................................................................................................ 17
4.3 Power Board Block Diagram......................................................................................................................... 18
4.4 Software Flow Chart...................................................................................................................................... 19
5. Circuit Schematic................................................................................................................................................. 20
5.1 Main Board 715G4641M01........................................................................................................................... 20
5.2 Power Board 715G4750-P02......................................................................................................................... 27
5.3 Converter Board 715G4013-P02 ................................................................................................................... 28
5.4 Key Board 715G4851k.................................................................................................................................. 29
6. Monitor exploded view ........................................................................................................................................ 30
7. PCB Layout.......................................................................................................................................................... 31
7.1 MainBoard 715G4641-M01........................................................................................................................... 31
7.2 PowerBoard 715G4750-P02.......................................................................................................................... 33
7.3 Converter Board 1-715G4013P02 ................................................................................................................. 35
7.4 KeyBoard715G4851...................................................................................................................................... 36
8. Maintenance ......................................................................................................................................................... 37
8.1 Maintainability Requirement ......................................................................................................................... 37
8.2 Disassembly SOP........................................................................................................................................... 37
8.3 Trouble Shooting............................................................................................................................................ 40
8.4 Software update step...................................................................................................................................... 45
8.5 Re-Writing DDC program step...................................................................................................................... 51
8.6 Factory mode adjustment............................................................................................................................... 54
9.BOM List............................................................................................................................................................... 56
9.1 Model：HIBGNZ6BAXK2DNJ ................................................................................................................... 56

ServiceManual AOCi2252VW
4
1. LCD Specifications
1.1 Product Features
Monitor Model AOC i2252VWH
LCD Panel
Driving system TFT Color LCD
Active Display Area 476.64mm (W)×268.11mm(H) 546.86mm diagonal
Pixel Pitch 0.2475 mm×0.2475mm
Max. Resolution 1920 x 1080@60Hz
Display Colors 16.7M Colors
Input signal
Video
R,G,B Analog Interface，75ohm,0.7V
DVI digital Interface ；HDMI
Separate Sync. H/V TTL
H-Frequency 30kHz—80kHz
V-Frequency 56Hz--75Hz
Audio HDMI、Line input
Input /output Connector
D-Sub 15pin
DVI 24pin
HDMI
Ø3.5
Dot Clock 165MHz
Plug & Play VESA DDC2B DDC/CI
Power Consumption
ON Mode <42W
Power Saving Mode <1W
Switch OFF <0.5W
Power Source 90~264VAC,47~63Hz, 1.5A Max supply current
Environmental
Considerations
Operating Temp: 0° to 40°C
Storage Temp.: -20° to 60°C
Operating Humidity : 8% to 80%
Altitude：Operating 0~3,658m (0~12,000ft)
Non-Operating 0~12192m (0~40,000ft)
Dimensions(including stand) 496.5(W)x378.6(H)x186 (D)mm
Weight (N. W.): 3.5kg
Safety FCC B CE mark CCC IEC950CB etc.

ServiceManual AOCi2252VW
5
1.2 Factory preset modes
STANDARD RESOLUTION HORIZONTAL
FREQUENCY
VERTICAL
FREQUENCY
VGA
640×480 31.469kHz 59.94Hz
640×480 35.00kHz 66.67Hz
640×480 37.861kHz 72.80Hz
640 × 480 37.50kHz 75.00Hz
DOS-mode
640 × 480 31.469kHz 70.087Hz
720 × 400 31.469kHz 70.087Hz
Mac-mode 832 ×624 49.725kHz 74.50Hz
SVGA
800 × 600 35.16kHz 56.25Hz
800 × 600 37.879kHz 60.317Hz
800 × 600 48.07kHz 72.188Hz
800 × 600 46.875kHz 75Hz
XGA
1024 × 768 48.363kHz 60Hz
1024 × 768 56.476kHz 70Hz
1024 × 768 60kHz 75Hz
1280 × 720 45kHz 60KHz
WXGA 1600 × 900 60.00kHz 60Hz
WSXGA
+
1920 x 1080@60Hz 67.5kHz 60.000Hz
1920 x 1080@60Hz 67.158kHz 59.963Hz
1.3 New Features
21.5”W Active matrix LCD panel，LED driver backlight;
Resolutions: 640 x 480 up to 1920 x 1080/60HZ
Clear Vision features added
Dynamic Contrast Ratio(DCR) 20000000:1
Display Interface: VGA, DVI,HDMI；EPA 5.0
Audio input/output

ServiceManual AOCi2252VW
6
1.4 VGA 15pin Connector
Pin No. Description Pin No. Description
1. Red Input 9. +5VDC
2. Green Input 10. Logic GND
3. Blue Input 11. N/A
4. N/A 12. SDA- DDC-Serial Data
5. Connection detect 13. H Sync
6. Red GND 14. V Sync
7. Green GND 15. SCL- DDC-Serial Clock
8. Blue GND
VGA Connector layout
15
610
11 15
1.5 DVI Connector
Pin No. Description Pin No. Description
1. TMDS Data 2- 13. TMDS Data 3+
2. TMDS Data 2+ 14. +5V Power
3. TMDS Data 2/4 Shied 15. Ground (for +5V)
4. TMDS Data 4- 16. Hot Plug Detect
5. TMDS Data 4+ 17. TMDS Data 0+
6. DDC Clock 18. TMDS Data 0-
7. DDC Data 19. TMDS Data 0/5 Shield
8. N.C. 20. TMDS Data 5-
9. TMDS Data 1- 21. TMDS Data 5+
10. TMDS Data 1+ 22. TMDS Clock Shield
11. TMDS Data 1/3 Shield 23. TMDS Clock+
12. TMDS Data 3- 24. TMDS Clock-
DVI Connector layout

ServiceManual AOCi2252VW
7
1.6 HDMI interface
Pin No. Description Pin No. Description
1 TMDS Data2+ 13 TMDS Clock Shield
2 TMDS Data2 Shield 14 TMDS Clock–
3 TMDS Data2– 15 CEC
4 TMDS Data1+ 16 Reserved (N.C. on device)
5 TMDS Data1 Shield 17 SCL
6 TMDS Data1– 18 SDA
7 TMDS Data0+ 19 DDC/CEC Ground
8 TMDS Data0 Shield 20 +5 V Power
9 TMDS Data0– 21 Hot Plug Detect
10 TMDS Clock+ 22
HDMI Connector layout

ServiceManual AOCi2252VW
8
2. Operation instruction
2.1 Connection
Connect the video cable ②or③or④ from the video card of PC to the monitor..
The power cord ①should be connected , Audio input cable ⑤ can be connected
Press the power button to turn on the monitor, the power indicator will light up.
2.2 Control Buttons
Control Button Description
1
To turn ON/OFF the moniteor, and power indicator
(Green/Orange).
2 Menu / Enter
Active main menu while no OSD display,enter next level on
main menu or sub menu status, or enter last level on
adjustment bar. Select Exit icon then press Menu button to
return to superior menu.
3Auto/Exit
Hotkey ,Input Source selection.D-SUB/DVI/HDMI
There is OSD, press Auto button to exit OSD.
4 +/Volume
/up
Hotkey, chang Volume +
OSD, increase current value of bar, or move to next item of
menu
5 -/Down
Hotkey, Clear Vision function ; chang Volume -;
OSD, it will decrease current value of bar, or it will move to
last item of menu.

ServiceManual AOCi2252VW
9
2.3 OSD User mode adjustment
a) OSD Menu adjustment steps:
1. Press MENU to activate OSD main menu, Touch +/ - button may select other Menu item..
2. Press MENU button to select items of each main menu.Touch +/ - to move and select.
3. Press MENU may select item you wish to enter. Touch +/ - to adjust item you selected.
4. Press MENU button to enter,
5. Press AUTO to EXIT OSD
6. Repeat steps 2-5 to adjust an additional item,

ServiceManual AOCi2252VW
10