AOC i2252VWH User manual

ServiceManual AOCi2252VW
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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

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

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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

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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.

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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

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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

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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

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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.

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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,

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b) hotkey OSD Menu as shown below
AUTO
Source selection
+
Volume
_
Clear vision mode

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2.4 OSD Locked
When press “ ” to switched on the monitor, while holding press the” menu” button, the menu
will be locked. Again, the OSD menu is non-locked.

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3. Panel Feature
LM215WF3 is a Color Active Matrix Liquid Crystal Display with a Light Emitting Diode ( White LED) backlight system
without LED driver. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display
operating in the normally black mode. It has a 21.5 inch diagonally measured active display area with FHD resolution
(1080 vertical by 1920horizontal pixel array) Each pixel is divided into Red, Green and Blue sub-pixels or dots which are
arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal
for each dot,thus, presenting a palette of more than 16,7M colors with A-FRC (Advanced Frame Rate Control).
It has been designed to apply the 8Bit 2 port LVDS interface. I t is intended to suppor t di splays where high br ightness,
super wide viewing angle, high color saturation, and high color are important.
3.1 General Specifications
3.2 Electrical Absolute Ratings

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3.3 Electrical Characteristics
LED array ELECTRICAL CHARACTERISTICS
3.4 TFT LCD Module Block Diagram

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3.5 LCD module input terminal pin assignment
3.6 LED connector Interface
LED connector on Backlight Unit pin configuration CI1406M1HRB-NH

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4.Block Diagram
4.1 LCD Block Diagram
4.2 MainBoard Block Diagram
Crystal
14.318MHz
(
X401
)
Panel Interface
(CN301/302)
MCU-Scarlar NT68677
(Include ADC, OSD, MCU)
(U401)
D-Sub
CN101
EEPROM
MX25L2026DM1I
(U402)
Key Board
Control
(CN401/402)
Voltage converter
5V
5V 3.3V 1.8V
DVI
CN102
HDMI
CN501
Line in
CN601
Audio
U601
Ear
CN603
CN604
AC-DC(5V/12V)
715G4750
Power Board
Main Board
715G4641
Key board PC- VGA
/DDC
LED-bar backlight
Panel
LVDS
AC supply
90V-264V
Monitor Block Diagram
PC- DVI
/DDC
Input signal
HDMI Audio
Line in
Converter
715G4013

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4.3 Power Board Block Diagram
Power MOS
MP3389
EMI Filter
16V Output
Dimming Signal
8A/700V
Protection Circuit
AC Input
Condenser
AUDIO
(2)10A/200V
Input Filter
Feedback Circuit
5V Output
Feedback Circuit
LD7750RGR
MMD 21.5" LIPS Block Diagram
Bridge Rectification
Rectifier Diode
BOOST
Flyback
LED Light bar
(1)10A/60V
CN902
Adapter IC
Transformer
2A 800V
ON/OFF Signal
Inverter IC

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4.4 Software Flow Chart
Start
Initial_MCU
Check if DataBuffer Is blank
Check if Sum is chan
g
ed ?
To Write default values
Read parameter_from Buffer
PowerHandler
Init_GlobalVariables
Initial_MCU Device
while
InputTiming
ModeHandler
MenuHandler
DebugHandler
if standby mode?
Brightness
Contrast
Language
InputType InputTimingStableCounter
OsdCounter
PowerDownCounter
LED turn-on
Show power on logo
if factory mode?
No signal message
UnsupportModeFlag
END
OSD Menu
Software Flow Chart
InputTiming
Phaes/Frequency
Image setup
Color
Oi
Enter factory mode OSD
Y
N
Y

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5. Circuit Schematic
5.1 Main Board 715G4641M01
HDMI1_+5V
+5V_SB
VCC1.8
06.AUDI O
6.AUDIO
Volume
Mut e
AOUT_R
AOUT_L
AIN _L
AIN _R
+5V_SB
Audio_SD
05.PANEL INTERFACE
5.PANEL INTERFACE
VLCD
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA9
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PB8
PB9
LT-SCL
LT-SDA
HDMI1_+5V
+5V_SB
DVI5V
CBPC BNZK2J1 1
i2252Vwh B
28Monday, August 08, 2011
715G4641-M01-000-0040 <
称爹 >
1.1 COVER & REVISE HISTORY
715G4641-M01-000-0040-1-110808
OE M MODEL Si ze
Rev
Date Sheet of
TPV MOD EL
PCB N AME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
VLCD
VLCD
VCC1.8
+5V_SB
03.HDMI1
3.HDMI1
HDMI1_+5V
HDMI1_D2+
HDMI1_D2-
HDMI1_D1+
HDMI1_D1-
HDMI1_D0+
HDMI1_D0-
HDMI1_CK+
HDMI1_CK-
HDMI1_SDA
HDMI1_SCL
DET_HDMI1
CEC_CTRL
HDMI1_HPD
DDC_WP
+5V_SB
04.SCALER
4.SCALER
RIN
GNDR
GIN
GNDG
BIN
GNDB
HSYNC
VSY NC
DDCA_SDA
DDCA_SCL
DVI_SCL
DVI_SDA
RX0+
RX0-
RX1+
RX1-
RX2+
RX2-
RXC+
RXC-
DET_VGAI
DET_DVII
DDC_WP
HDMI1_D2+
HDMI1_D2-
HDMI1_D1+
HDMI1_D1-
HDMI1_D0+
HDMI1_CK+
HDMI1_CK-
HDMI1_D0-
HDMI1_SDA
HDMI1_SCL
DET_HDMI1
CEC_CTRL
HDMI1_HPD
DDC_WP
Mut e
AOUT_L
AOUT_R
AIN _R
AIN _L
on_Panel
on_BACKLIGHT
Adj_BACKLIGH T
PANEL_ID#
Audio_EN
Mut e
VCC3.3
VCC1.8
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PB8
PB9
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA9
DVI_HPD
DVI5V
HDMI1_+5V
+5V_SB
LT-SDA
LT-SCL
Audio_SD
DVI5V
+5V_SB
VCC3.3
02.INPUT
2.INPU T
RIN
GNDR
GIN
GNDG
BIN
GNDB
HSYNC
VSYNC
DDCA_SDA
DDCA_SCL
RX0+
RX0-
RX1-
RX1+
RX2+
RX2-
RXC-
RXC+
DVI_SDA
DVI_SCL
DET_VGAI
DET_DVII
DDC_WP
DVI5V
+5V_SB
DVI_HPD
VCC3.3
07.POWER
7.POWER
on_Panel
on_BACKLIGHT
Adj_BACKLIGH T
PANEL_ID #
Audio_EN
Mut e
VCC1.8
VCC3.3
VLCD
+5V_SB
Volume
+5V_SB