Asus VH222S User manual

Service Manual ASUS VH222S&VH222D
1
LCD Monitor Service Manual
Model: ASUS VH222S&VH222D
D
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND
SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY
OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL,

Service Manual ASUS VH222S&VH222D
2
Index
Revision Lists………………………………….............................................................................. 3
Important Safety Notice…………………………………………………………………………………..4
1. Monitor Specification..............................……….........................................................................5
2. Operation Instruction…………………………………………………………………………………..6
2.1. General Instructions...........................…............................................................................ 6
2.2.Control Button…………….…..............……......................................................................... 6
2.3.OSD Menu…………….…...........................…......................................................................8
3. Input/Output Specification............……………..........................................................................11
3.1. Input Signal Connector............…………............................................................................11
3.2. Power Supply Requirements............................................................................................ 11
3.3. Factory Preset Display Modes…….................................................................................. 12
4. Block Diagram…..….....................………….............................................................................14
4.1.Software Flow Chat..........................................................................................14
42.Electircal Block Diagram.........................................................................................................16
5. Schematic Diagram……………………....…............................................................................ 18
5.1. Main Board……….............................................................................................................18
5.2. Power Board...…….......................................................................................................... 22
5.3. Key Board…………….......................................................................................................25
6. PCB Layout...………................................................................................................................26
6.1. Main Board……….............................................................................................................26
6.2. Power Board…................................................................................................................. 29
6.3. Key Board……………................................... ...................................................................30
7. Disassemble & Assemble SOP.……………….. ............................................................... …..31
8. ISP Instruction………..............................................................................................................44
9. DDC Instruction…………………………........... .......................................................................47
10. Color/White Balance Adjustment……………........................................................................ 56
11. Trouble Shooting……………………….................................................................................. 58
12. Exploded View…..……………………..... ......................................................................... .....64
13. BOM List………………………………….............................................................................. 65
14. Different Parts List……………………………………..…………………………………………87

Service Manual ASUS VH222S&VH222D
3
Revision List
Version Release Date Revision History Customer Model TPV Model Name
A00 Oct 27, 2008 Initial release VH222S TIRMABNTXCUSAZ
TIRMABNCXCUSNN
TIRAABNCX9USNN
TIRMABNBXCUSAN
A01 Dec,15,2008 Add new BOM VH222S
TIRAABNBX9USAN
TIRAABNBX9USNN
A02 Jan,08,2009 Add new BOM VH222D TIRMABNBXCUSNN

Service Manual ASUS VH222S&VH222D
4
Important Safety Notice
Safety information
• Before setting up the monitor, carefully read all the documentation that came with the package.
• To prevent fire or shock hazard, never expose the monitor to rain or moisture.
• Never try to open the monitor cabinet. The dangerous high voltages inside the monitor may result in serious
physical injury.
• If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer.
• Before using the product, make sure all cables are correctly connected and the power cables are not damaged. If
you detect any damage, contact your dealer immediately.
• Slots and openings on the back or top of the cabinet are provided for ventilation. Do not block these slots. Never
place this product near or over a radiator or heat source unless proper ventilation is provided.
• The monitor should be operated only from the type of power source indicated on the label. If you are not sure of the
type of power supply to your home, consult your dealer or local power company.
• Use the appropriate power plug which complies with your local power standard.
• Do not overload power strips and extention cords. Overloading can result in fire or electric shock.
• Avoid dust, humidity, and temperature extremes. Do not place the monitor in any area where it may become wet.
Place the monitor on a stable surface.
• Unplug the unit during a lightning storm or if it will not be used for a long period of time. This will protect the monitor
from damage due to power surges.
• Never push objects or spill liquid of any kind into the slots on the monitor cabinet.
• To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate configured
receptacles marked between 100-240V AC.
• If you encounter technical problems with the monitor, contact a qualified service technician or your retailer.
WARNING
• Before you lift or reposition your monitor, it is better to disconnect the cables and power cord. Follow the correct
lifting techniques when positioning the monitor. When lifting or carrying the monitor, grasp the edges of the
monitor.Do not lift the display by the stand or the cord.
• Cleaning. Turn your monitor off and unplug the power cord. Clean the monitor surface with a lint-free, non-abrasive
cloth. Stubborn stains may be removed with a cloth dampened with mild cleaner.
• Avoid using a cleaner containing alcohol or acetone. Use a cleaner intended for use with the LCD. Never spray
cleaner directly on the screen, as it may drip inside the monitor and cause an electric shock.
WARNING: Information to prevent injury to yourself when trying to complete a task.
CAUTION: Information to prevent damage to the components when trying to complete a task.
IMPORTANT: Information that you MUST follow to complete a task.
NOTE: Tips and additional information to aid in completing a task.

Service Manual ASUS VH222S&VH222D
5
1. Monitor Specifications
Model VH222S VH222D
Panel Size 21.5”W 21.5”W
True Resolution 1920X1080 1920X1080
Brightness (Max.) ≧300cd/m
2
≧300cd/m
2
Intrisinc Contrast Ratio ≧1000:1 ≧1000:1
Viewing Angle (CR=10) ≧160°(V), ≧170°(H) ≧160°(V), ≧170°(H)
Color Saturation (NTSC) 72% 72%
Display Colors 16.7M 16.7M
Response Time 5ms (Tr+Tf) 5ms (Tr+Tf)
Satellite Sperker 2W x 2 stereo No
D-SUB Input Yes Yes
Audio Line-in Yes No
Power On 45W 45W
Tilt +20°～-5° +20° ～-5°
VESAWall Mounting Yes (100mm x 100mm) Yes (100mm x 100mm)
Phys. Dimension 515 x220 x330.5 515 x220 x330.5
Box Dimesion (WxHxD) 588 x 452 x 162 588 x 452 x 162
Net Weight (Esti.) 4.5 4.5
Gross Weight (Esti.) 7.0 6.8
Voltage Rating AC: 100～240V (Built-in) AC: 100～240V (Built-in)

Service Manual ASUS VH222S&VH222D
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2. Operation Instruction
2.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located at the front of the
panel of the monitor.
By changing these settings, the picture can be adjusted to your personal preferences.
-The power cord should be connected.
-Connect the video cable from the monitor to the video card.
-Press the power button to turn on the monitor, the power indicator will light up.
2.2 Control Button
Rear View

Service Manual ASUS VH222S&VH222D
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Front View

Service Manual ASUS VH222S&VH222D
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2.3 OSD Menu
2.3.1 How to reconfigure
1. Press the MENU button to activate the OSD menu.
2. Press ▼and ▲to navigate through the function.
Highlight and activate the desired function by pressing the
MENU button. If the function selected has a sub-menu,
press ▼and ▲again to navigate through the sub-menu
functions. Highlight and activate the desired sub-menu
function by pressing the Menu function.
3. Press ▼and ▲to change the settings of the selected
function.
4. To exit the OSD menu, press the button. Repeat step
2 and step 3 to adjust any other function.
2.3.2 OSD Function Introduction
1. Spendid
This function contains five sub-functions you can
select for your preference. Each mode has the Reset
selection, allowing you to maintain your setting or
return to the preset mode.
• Scenery Mode: Best choice for scenery photo display with SPLENDID™ Video Enhhancement.
• Standard Mode: Best choice for document editing with SPLENDID™ Video Enhancement.
• Theater Mode: Best choice for movie with SPLENDIF™ Video Enhancement.
• Game Mode: Best choice for game playing with SPLENDID™ Enhancement.
• Night View Mode: Best choice for dark-scene game or move with SPLENDID™ Video Enhancemetn.
• In the Standard Mode, the Satuation and ASCR functions are not user-configurable.
• In the other modes, the sRGB function is not user-configurable.

Service Manual ASUS VH222S&VH222D
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2. Image
You can adjust brightness, contrast, sharpness,
saturation, position (VGA only), and focus (VGA only)
from this main function.
• Brightness: the adjusting range is from 0 to 00. is a hotkey to activate this function.
• Contrast: the adjusting range is from 0 to 00.
• Sharpness: the adjusting range is from 0 to 00.
• Saturation: the adjusting range is from 0 to 00.
• Position: adjusts the horizontal postition (H-Position) and the vertical position (V-Position) of the image.
The adjusting range is from 0 to 00.
• Focus: reduces Horizonal-line noise and Vertical-line noise of the image by adjusting (Phase) and (Clock)
separately. The adjusting range is from 0 to 00.
• Phase adjusts the phase of the pixel clock signal. With a wrong phase adjustment, the screen
shows horizontal disturbances.
• Clock (pixel frequency) controls the number of pixels scanned by one horizontal sweep. If the
frequency is not correct, the screen shows vertical stripes and the image is not proportional.
3. Color
Select the image color you like from this function.
• Color Temp.: contains five color modes including Cool,
Normal, Warm, sRGB, and User mode.
• Skin Tone: contains three color modes including
Reddish, Natural, and Yellowish.
In the User mode, colors of R (Red), G (Green),
and B (Bluee) are userconfigurable; the adjusting range is
from 0- 00.

Service Manual ASUS VH222S&VH222D
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4. Input Select
In this function, you can select VGA, DVI, and HDMI
input source (Only for some models).
5. System Setup
Allow you to adjust the system.
• Volume: the adjusting range is from 0 to 00. is a
hotkey to activate this function.
• OSD Setup: adjusts the horizontal postition (H-Position)
and the vertical position (V-Position) of the OSD. The
adjusting range is from 0 to 00. In the OSD Timeout
selection, you can adjust the OSD timeout from 0 to 20.
• Language: there are ten languages for your selection,
Including English, German, Italian, French, Dutch, Spanish,
Russian, Traditional Chinese, Simplified Chinese,
Japanese, and Korean.
• Aspect Controls: adjusts the aspect ratio to “Full” or “4:3”.
• Information: shows the monitor information.
• Reset: “Yes” allows you to revert to the preset mode.

Service Manual ASUS VH222S&VH222D
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3. Input/Output Specification
3.1 Input Signal Connector
Analog connectors
Pin No. Description Pin No. Description
1. Red Video 9. +5V Supply
2. Green Video 10. Logic Ground
3. Blue Video 11. Monitor Ground
4. Monitor Ground 12. DDC-Serial Data
5. DDC-Return 13. H-Sync
6. Red Ground 14. V-Sync
7. Green Ground 15. DDC-Serial Clock
8. Blue Ground
VGA connector layout
3.2 Power Supply Requirements
A/C Line voltage range 100 V ~ 240 V
A/C Line frequency range 50 ±3Hz, 60 ±3Hz
Input Voltage transients 90-264 voltage AC for 10 sec @40
Current 1.5A max at 100V; 0.8A max at 240 V
Peak surge current < 60A peak at 240 VAC and cold starting
< 30A peak at 120VAC and cold starting
Leakage current < 3.5mA
Power line surge No advance effects (no loss of information or defect)
with a maximum of 1 half-wave missing per second

Service Manual ASUS VH222S&VH222D
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3.3 Factory Preset Display Modes
VESA Modes, Factory Preset Timings

Service Manual ASUS VH222S&VH222D
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VESA Modes, User Available Timings
Modes not listed in the above tables may not be supported. For optimal resolution, we
recommendthatyou choose a mode listed in the above tables

Service Manual ASUS VH222S&VH222D
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4. Block Diagram
4.1 Software Flow Chat
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
15
Y
N
16
17
19
Y
N
18

Service Manual ASUS VH222S&VH222D
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1) MCU initializes.
2) Is the EPROM blank?
3) Program the EPROM by default values.
4) Get the PWM value of brightness from EPROM.
5) Is the power key pressed?
6) Clear all global flags.
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9)
Save the power key status into EPROM.
Turn on the LED and set it to green color.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are there any signals coming?
13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
15) 15) Are there any signals coming from analog port?
16)
Display "No connection Check Signal Cable" message. And go into standby mode after the message
disappears.
17) Program the scalar to be able to show the coming mode.
18) Process the OSD display.
19) Read the keyboard. Is the power key pressed?

Service Manual ASUS VH222S&VH222D
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4.2 Electrical Block Diagram
4.2.1 Main Board
Flash Memory
SST25LF020A
(U402)
Panel Interface
(CN403)
Crystal
14.31818MHZ
(X401)
Keypad Interface
(CN401)
Scalar TSUMU18ER-1
(Include MCU, ADC, OSD)
(U401)
D-Sub Connector
(CN101)
H sync
V sync
RGB

Service Manual ASUS VH222S&VH222D
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4.2.2 Inverter/Power Board
DIM
EMI filter
Start Circuit: R908, R911
PWM Control
IC LD7576
Transformer
AC input
14.5V
ON/OFF
Control
Feedback
Circuit
Transformer MOSFET
Lamp
ON/OFF
5V
Bridge
Rectifier
and Filter
Feedback
Circuit
Rectifier
diodes
CN902
Output
Circuit
PWM Control
IC TL494IDR
Over Voltage

Service Manual ASUS VH222S& VH222D
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5. Schematic
5.1 Main Board
715G2904-2-5
V_Sync
C105
0.047uF
ESD_VCC 5
GND POWER
R105
2K2 1/16W 5%
VGA_R-
C101
0.047uF
FB102
BEAD
1 2
C108
5pF/50V
CN101
DB15
1
6
2
7
3
8
4
9
5
11
12
13
14
15 10
17 16
DET_CABLE 5
V_Sync
VCC3.3 7
DSUB_V 5
ZD103
UDZSNP5.6B
1 2
VGA_G+
VGA_R+
FB101
BEAD
1 2
H_Sync
TCRMABN8XCUSAN 2
ASUS VH222S B
4 7Wednesday, July 09, 2008 715G2904-1B-5
󱐴󰾖 < >
02.Input
G2904-2-5-X-3-081008
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
󱐴󰾖
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 󲑳 󱄗 󱙲 󱢜
C110
0.047uF
R109
390 OHM 1/16W
FB103
BEAD
1 2
VGA_R-
R106
2K2 1/16W 5%
H_Sy nc
C103
22pF
VGA_PLUG
DSUB_SDA
DSUB_H 5
C102
22pF R107
75R 1/16W 5%
ESD_VCC
DDC1_SDA5
C109
0.047uF
DSUB_5V
DSUB_5V
DDC1_SDA
U102
AZC099-04S
1
2
3 4
5
6
I/O1
GND
I/O2 I/O3
VDD
I/O4
DSUB_B+ 5
R118
1K 1/16W 5%
C111
5pF/50V
DSUB_SDA
VCC3.3
DSUB_SOG 5
R112
75R 1/16W 5%
R117
100R 1/16W 5%
U101
R115
100R 1/16W 5%
VGA_R+
DDC1_SCL
C107
0.047uF
DSUB_B- 5
R110
100R 1/16W 5%
R121
10K 1/16W 5%
R120
10K 1/16W 5%
VCC3.3
VGA_G-
R113
100R 1/16W 5%
R104
100R 1/16W 5%
ESD_VCC
R103 100R 1/16W 5%
C106
0.047uF
C104
5pF/50V
DGND
DSUB_SCL
R102 100R 1/16W 5%
DSUB_R- 5
U103
VGA_G+
C115
NC
R114
100R 1/16W 5%
R111
100R 1/16W 5%
R116
75R 1/16W 5%
VGA_R+
U103
AZC099-04S
1
2
3 4
5
6
I/O1
GND
I/O2 I/O3
VDD
I/O4
R108
100R 1/16W 5%
ZD104
UDZSNP5.6B
1 2
VGA_G+ DSUB_G+ 5
DDC1_SCL5
VGA_B+
VGA_B+
DSUB_G- 5
C114
NC
VGA_B-
DSUB_SCL
VGA_B-
VGA_B+
DSUB_5V 5
VGA_PLUG
DSUB_R+ 5
VGA_G-
C113
0.047uF
R101 0R05 1/10W 5%

Service Manual ASUS VH222S& VH222D
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VCC3.3
DDC1_SDA3
C408
0.22uF16V
KEY2
DSUB_B+3
MSDA
R455
NC
R413 100R 1/16W 5%
PA[4..9] 5
DET_CABLE 4
TCRMABN8XCUSAN 2
ASUS VH222S C
5 7Wednesday, October 08, 2008 715G2904-1B-5
󱐴󰾖 < >
03.Scalar
G2904-2-5-X-3-081008
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
󱐴󰾖
T P V ( Top Victory Electronics Co . , Ltd. )
Ke y Component
絬 󲑳 󱄗󱙲 󱢜
WP
LVDS
PA[4..9]
PB3
R421
NC/10K 1/16W 5%
R417
10K 1/16W 5%
PB7
VCTRL 7
PB6
R404
10K 1/16W 5%
VDDC
+
C410
10UF50V
adj_BACKLIGHT 7
U402
SST25LF020A-33-4C-SAE
1
2
3
4 5
6
7
8
CE#
SO
WP#
VSS SI
SCK
HOLD#
VDD
R401
33R 1/16W 5%
VCC3.3
C409
0.1uF/16V
R424 100R 1/16W 5%
R425
NC
EE_WP
C411 22pF
C403
0.1uF/16V
DSUB_G+3
KEY_LEFT
DSUB_R-3
Volume# 7
PA8
PA6
PA[0..1]
R406
6K8 1/16W 5%
R402
470R 1/16W 5%
R431 NC
C417
0.1uF/16V
DSUB_H3
EE_WP
KEY_AUTO
KEY_RIGHT
VCC1.8
POWER_KEY#
PPWR_ON# 6
PB4
R409
10K 1/16W 5%
R420 100R 1/16W 5% POWER_KEY#
FB401
300OHM
KEY1
POWER_KEY#
R459
47K 1/16W 5%
LED_ORANGE
R405 100R 1/16W 5%
R432 NC
DSUB_R+3
LED_ORANGE
R456 0R05 1/16W
R407
10K 1/16W 5%
X401
14.31818MHz
1 2
C401
0.1uF/16V
PB2
CMVCC1
PA7
C414
0.1uF/16V
DDC1_SCL3
PA1
R412 100R 1/16W 5%
R411 100R 1/16W 5% KEY2
MSCL
MSDA
C416
0.1uF/16V
R457 0R05 1/16W
VCC3.3
R429 NC
LED_GRN/BLUE
R408
10K 1/16W 5%
AVDD
Mute 7
U403
NC
1
2
3
45
6
7
8NC
NC
NC
VSSSDA
SCL
WC
VCC
TSUMU18ER-1
U401
13
10
11
8
12
9
7
16
17
4
15
14
21
23
22
24
27
56
1
2
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
34
33
56
32
31
52
30
18
19
62
20
28
55
58
59
60
61
63
64
25
26
54
51 53
29
57
3
RIN0P
GIN0P
SOGIN0
BIN0P
RIN0M
GIN0M
BIN0M
HSYNC0
VSYNC0
REXT
REFP
REFM
SDO
SCK
SCZ
SDI
PWM2/GPIO_P24
PWM1/GPIO_P25
XIN
XOUT
LVA2P
LVA2M
LVA1P
LVA1M
LVA0P
LVA0M
LVB3P
LVB3M
LVBCKP
LVBCKM
LVB2P
LVB2M
LVB1P
LVB1M
LVB0P
LVB0M
LVA3M
LVA3P
GND AVDD_ADC
MODE[1]
MODE[0]
VCTRL
VDDC
DDCA_SDA/RS232_TX
DDCA_SCL/rs232_RX
PWM0/GPIO_P26
GPIO_P15/PWM0
GPIO_P27/PWM1
GPIO_P12
GPIO_P00/SAR1
GPIO_P01/SAR2
GPIO_P06
GPIO_P07
GPIO_P13
GPIO_P14
GPIO_P11/I2C_MDA
GPIO_P10/I2C_MCL
RST
VDDP
VDDC
GND
RSTN
GND
C418
NC
C413
NC/0.1uF/16V
PB[0..9]
KEY1
R428
3.9K OHM 1/16W
PB8
R414 22R 1/16W 5%
VDDC
PB9
C404
0.1uF/16V
R410 120R 1/16W 5%
VCC3.3
DSUB_V3
on_BACKLIGHT 7
VCC1.87
C429
NC
CN402
NC \ CONN
1
2
3
4
5
6
7
8
R430 NC
LED_GRN/BLUE
C407
0.1uF/16V
PA9
CMVCC1
DSUB_B-3
R451 NC
PANEL_ID# 7
PA5
DSUB_G-3
R452 NC
LED_GRN/BLUE
R458
10K 1/16W 5%
CMVCC17
R418
100R 1/16W 5%
AVDD CMVCC
7
PB1
VCC3.37
C415
0.1uF/16V
VDDP
R427
3.9K OHM 1/16W
DSUB_SOG3
CMVCC
C412 22pF
LED_ORANGE
MSCL
C406
0.1uF/16V
AVDD
R419
100R 1/16W 5%
PB[0..9] 5
Near to Connect
PA0
C430
0.1uF/16V
PA[0..1] 5
VDDP
Q401
AO3401
R403 390 OHM 1/16W
CN401
CONN
1
2
3
4
5
6
R454
NC
C433
0.1uF/16V
R426 NC
R453
NC
PA4
PB0
PB5

Service Manual ASUS VH222S& VH222D
20
PA5
PB1
G
+
C421
100UF25V
PA1
PA8
TCRMABN8XCUSAN 2
ASUS VH222S A
6 7Tuesday, August 12, 2008 715G2904-1B-5
󱐴󰾖
< >
04.Output
G2904-2-5-X-3-081008
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
󱐴󰾖
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 󲑳 󱄗 󱙲 󱢜
CMVCC 7
PA[4..9]
PA6
PB3
3
PB4
S
PB[0..9]
PA5
PA7
R435
4K7 1/16W 5%
PPWR_ON#5
PA4
PB6
PB3
PA9
PB9
CN403
CONN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
AO3401L
PA8
FB402
120OHM
PB8
PB4
Q405
AO3401
PA[4..9]5
PB8
PA0
PB7
PB6
R434
330 OHM 1/4W
PA4
R436
100K 1/16W 5%
PANEL_VCC
C420
0.1uF/16V
PB0
PB5
C419
0.1uF/16V
2006-11-7 Add pull up 4K7 to MVCC
PB9
PPWR_ON#
PA[0..1]
PB7
1
PB3
PB0
PB2
Q404
MMBT3906
CMVCC
PA7
PA9
PB[0..9]5
PA1
PB2
PB1
D
PA0
PB5
PA6
R433
10K 1/16W 5%
PB2
PANEL_VCC
2
PA[0..1]5