AOC 2230Fh User manual

22" LCD Color Monitor AOC 2230FH
1
Service
Service
Service
HorizontalFrequency
31-83kHz
TABLE OF CONTENTS
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
Table Of Contents…………………………………………...1
Important Parts List…………………………………………2
Revision List………………………………………………....3
1. Monitor Specification..............................…………........4
2. LCD Monitor Description…………………………….......5
3. Operation Instruction....................................…...........6
3.1. General Instructions...........................…....................6
3.2. Control Button…………………………….…...............6
3.3 Adjusting the Picture...........................…..............8
4. Input/Output Specification............……………............12
4.1. Input Signal Connector............………….................12
4.2. Factory Preset Display Modes...........…..................13
4.3. Panel Specification.....………..…………..................14
5. Block Diagram….........................................................16
5.1 Software Flow Chart………………………….……….16
5.2.Electrical Block Diagram…..……………………........18
6. Schematic……………..............................................19
6.1 Main Board....……….............................................19
6.2 Power Board………………………………………....26
6.3 Key Board…………………………………...………….29
7. PCB Layout..…………................................................30
7.1. Main Board………...................................................30
7.2. Power Board…........................................................33
7.3. Key Board…............................................................36
8.Maintainability………...............................................37
8.1.Equipments and Tools Requirement.........................37
8.2.Trouble Shooting………............................................38
9. White-Balance, Luminance adjustment…...……..…...44
10. Monitor Exploded View……………………….…........46
11. BOM List…................................................................47
12. Different Parts List……………………………………..60
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

22" LCD Color Monitor AOC 2230FH
2
Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended byAOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to asAOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics might create
shock, fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission fromAOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiations when openAVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)

22" LCD Color Monitor AOC 2230FH
3
Revision List
Version Date Revision History TPV Model Name
A00 Jun.-3-2008 Initial release TC8MM8NKWCA1DN
A01 Jul.-6-2008 Add new BOM TC8MM8NQWCA15N

22" LCD Color Monitor AOC 2230FH
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1. Monitor Specification
Model number 2230Fh
Driving system TFT Color LCD
Viewable Image Size 558mm diagoanl
Pixel pitch 0.282mm(H) x 0.282mm(V)
Video R, G, B Analog lnterface & Digital Interface, HDMI
Separate Sync. H/V TTL
Display Color 16.7M Colors
LCD Panel
Dot Clock 165 MHz
Horizontal scan range 31 kHz - 83 kHz
Horizontal scan
Size(Maximum) 473.76mm
Vertical scan range 56 Hz - 76 Hz
Vertical scan Size(Maximum) 296.1mm
Optimal preset resolution 1680 x 1050 (60 Hz)
Highest preset resolution 1680 x 1050 (60 Hz)
Plug & Play VESA DDC2B/CI
Input Connector D-Sub & DVI-D,HDMI
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM, Positive &
DVI-D,HDMI
Power Source 100~240VAC, 50/60Hz
Active < 49 W
Power Consumption Standby < 2 W
Resolution
Speakers 2 x 2W
Connector Type 15-pin Mini D-Sub & 24 pin DVI-D, 19 pin HDMI
Signal Cable Type Detachable
Dimensions & Weight:
Height (with base) 416.8 mm
Width 510.2 mm
Depth 219.6 mm
Weight (monitor only) 5.2kg
Physical
Characteristics
Weight (with packaging) 6.7 kg
Temperature:
Operating 0° to 40°
Non-Operating -20°to 60°
Humidity:
Operating 10% to 85% (non-condensing)
Non-Operating 5% to 80% (non-condensing)
Altitude:
Operating 0~ 3000m (0~ 10000 ft )
Environmental
Non-Operating 0~ 5000m (0~ 15000 ft )

22" LCD Color Monitor AOC 2230FH
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2. LCD Monitor Description
The LCD Monitor will contain main board, power board, key board which house the flat panel control logic,
brightness control logic and DDC.
The power board will provideAC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage.
Power Board
(Include adapter and inverter)
Flat Panel and
CCFL backlight
Main Board
RS232 Connector
For white balance
adjustment in
factory mode
HOST Computer
CCFT Drive.
AC-IN
100V~240V
Monitor Block Diagram
Key board
Video signal, DDC

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3. Operation Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor
(See Figure ). By changing these settings, the picture can be adjusted to your personal preferences.
* The power cord should be connected.
* Press the power button to turn on the monitor. The power indicator will light up.
3.2 Control Buttons
3.2.1 External Controls
1 Eco mode / Up 4 DCR / Right
2 Source(Auto) / Exit 5 Menu / Power
3 Volume /Left
3.2.2 Attaching the Cables
1. Power 4. Analog
2. HDMI 5. Audio
3. DVI 6. Earphone

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3.2.3 Attaching Wall Mounting Arm
Preparing to Install An Optional Wall Mounting Arm
This monitor can be attached to a wall mounting arm you purchase separately. Disconnect power before this
procedure. Follow these steps:
1. Remove the base.
2. Follow the manufacturer's instructions to assemble the wall mounting arm.
3. Place the wall mounting arm onto the back of the monitor. Line up the holes of the arm with the holes in the
back of the monitor.
4. Insert the 4 screws into the holes and tighten.
5. Reconnect the cables. Refer to the user's manual that came with the optional wall mounting arm for
instructions on attaching it to the wall.

22" LCD Color Monitor AOC 2230FH
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3.3 Adjust the Picture
OSD Settings
•Press the Menu (Power) button to activate the OSD window. Press left, right, up, down button to navigate
through the functions. Once the desired function is highlighted, press the Menu (Power) button to activate
sub-menu .
•In sub-menu, Press up, down button to navigate through the functions. Once the desired function is
highlighted, press , button to button to change the setting. Press Menu (Power) button to return to
superior menu.
•If you want to adjust any other function, repeat steps 1-2.
•To exit OSD windows, select “exit” icon on main OSD, then press the Menu (Power) button .
•OSD Lock Function: To lock the OSD, press and hold the Left button while the monitor is off and then press
power button to turn the monitor on. To un-lock the OSD - press and hold the Left button while the monitor is
off and then press power button to turn the monitor on.
•Eco Mode hot key ( ) : Press the Eco key continuously to select the Eco mode of brightness when there is
no OSD ( Eco mode hot key may not be available in all models).
•Volume adjustment hot key : When there is no OSD , press Volume ( ) to active volume adjustment bar,
press or to adjust volume ( Only for the models with speakers).
•DCR hot key ( ) : Press DCR key continuously to active or disable DCR function when there is no OSD.
•Source hot key : When the OSD is closed, press Auto/Source button will be Source hot key function (Only
for the models with dual or more inputs) .Press Source button continuously to select the input source
showed in the message bar , press Menu button to change to the source selected.
•Auto configure hot key: When the OSD is closed, press Auto/Source button continuously about 2 second to
do auto configure.
•Press the Power button continuously about 2 second to turn off the monitor.

22" LCD Color Monitor AOC 2230FH
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Full Enhance: When "Full Enhance" is turned on, the color saturation of the entire screen is fully enriched, thus all
colors become more vibrant.
Nature Skin: When "Natural Skin" is turned on, the red and yellow colors are enriched automatically, thus presents
human skin with more natural and truer colors. "Natural Skin" setting is ideal for viewing human
portrait and detailed skin texture.
Green Field: When "Green Field" is turned on, the green color is enriched so that football field and mountain
landscape would look more natural and fresh. “Green Field” setting is ideal for watching mountain
scenery and outdoor sports.
Sky Blue: When"Sky Blue" is turned on, the color blue is being fine-tuned so that the sky or ocean landscape will
look more vivid and in-depth. "Sky Blue" setting is ideal for viewing sky and ocean images.
Auto Detect: When “Auto Detect” is turned on, every pigment will be detected and self-adjusted to render a lively
picture.
Demo: Screen divided into two for demonstration purposes.
Function Control Illustration
Luminance Adjust Range Description
Brightness 0-100 Backlight Adjustment
Contrast 0-100 Contrast from Digital-register.
Standard
Standard Mode
Text
Text Mode
Internet
Internet Mode
Eco mode
Game Mode

22" LCD Color Monitor AOC 2230FH
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Game
Movie
Movie Mode
Sports
Sports Mode
Gamma1 Adjust to Gamma1
Gamma2 Adjust to Gamma 2
Gamma
Gamma3 Adjust to Gamma 3
Off
Disable dynamic contrast ratio
DCR
On
Enable dynamic contrast ratio
Image Setup
Clock 0-100 Adjust picture Clock to reduce
Vertical-Line noise.
Phase 0-100 Adjust Picture Phase to reduce
Horizontal-Line noise
H.Position 0-100 Adjust the verticalposition of the
picture.
V.Position 0-100 Adjust the horizontal position of
the picture.
Color Temp.
Warm 6500K Recall Warm Color Temperature
from EEPROM.
Normal 7300K Recall Normal Color
Temperature from EEPROM.
Cool 9300K Recall Cool Color Temperature
from EEPROM.
sRGB Recall SRGB Color Temperature
from EEPROM.
Red Red Gain from Digital-register
Green Green Gain Digital-register.
User Blue Blue Gain from Digital-register
Color Boost
Full Enhance on or off Disable or Enable Full Enhance
Mode
Nature Skin on or off Disable or Enable Nature Skin
Mode
Green Field on or off Disable or Enable Green Field
Mode
Sky-blue on or off Disable or Enable Sky-blue Mode
AutoDetect on or off Disable or Enable AutoDetect
Mode
Demo on or off Disable or Enable Demo
Picture Boost
Frame Size 14-100 Adjust Frame Size
Brightness 0-100 Adjust Frame Brightness

22" LCD Color Monitor AOC 2230FH
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Contrast 0-100 Adjust Frame Contrast
Hue 0-100 Adjust Frame Hue
Saturation 0-100 Adjust Frame Saturation
H. position Adjust Frame horizontal Position
Position V.position Adjust Frame vertical Position
Bright Frame on or off Disable or Enable Bright Frame
OSD Setup
H.Position 0-100 Adjust the verticalposition of OSD
V.Position 0-100 Adjust the horizontal position of
OSD
Timeout 5-120 Adjust the OSD Timeout
Transparence 0-100 Adjust the transparence of OSD
Language Select the OSD language
Extra
Auto Select to Auto Detect input signal
Analog Select Analog Sigal Source as
Input
Input Select
Digital Select Digital Sigal Source as
Input
Auto Config yes or no Auto adjust the picture to default
Image Ratio wide or 4:3 Select wide or 4:3 format for
display
DDC-CI yes or no Turn ON/OFF DDC-CI Support
Information Show the information of the main
image and sub-image source
Reset
Reset yes or no Reset the menu to default
Exit
Exit Exit the main OSD
Notes:
1) If the product has only one signal input, the item of "Input Select" is disable to adjust.
2) If the product screen size is 4:3 or input signal resolution is wide format, the item of "Image Ratio" is disalbe to
adjust.
3) One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly.
LED Indicators
Status LED Color
Full Power Mode Green or Blue
Active-off Mode Orange or red

22" LCD Color Monitor AOC 2230FH
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4. Input/Output Specification
4.1 Input Signal Connector
D-Sub mini 15pin Connector
Pin Number 15-Pin Side of the Signal Cable
1 Video-Red
2 Video-Green
3 Video-Blue
4 N.C.
5 Ground
6 GND-R
7 GND-G
8 GND-B
9 +5V
10 Ground
11 N.C.
12 DDC-Serial data
13 H-sync
14 V-sync
15 DDC-Serial clock
DVI-D 24pin Connector
Pin No. Signal Name Pin No. Signal Name Pin No. Signal Name
1 TMDS Data 2- 9 TMDS Data 1- 17 TMDS Data 0-
2 TMDS Data 2+ 10 TMDS Data 1+ 18 TMDS Data 0+
3 TMDS Data 2/4 Shield 11 TMDS Data 1/3 Shield 19 TMDS Data 0/5 Shield
4 TMDS Data 4- 12 TMDS Data 3- 20 TMDS Data 5-
5 TMDS Data 4+ 13 TMDS Data 3+ 21 TMDS Data 5+
6 DDC Clock 14 +5V Power 22 TMDS Clock Shield
7 DDC Data 15 Ground(for+5V) 23 TMDS Clock +
8 N.C. 16 Hot Plug Detect 24 TMDS Clock -

22" LCD Color Monitor AOC 2230FH
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4.2 Factory Preset Display Modes
Stand Resolution Horizontal
Frequency(Khz)
Vertical
Frequency(Hz)
VGA 640×480 @60Hz 31.469 59.940
VGA 640×480 @72Hz 37.861 72.809
VGA 640×480 @75Hz 37.500 75.000
Dos-mode 720×400 @70Hz 31.469 70.087
Dos-mode 640×400 @71Hz 31.469 70.087
SVGA 800×600 @56Hz 35.156 56.250
SVGA 800×600 @60Hz 37.879 60.317
SVGA 848x480@60Hz 31.020 60.000
SVGA 800×600 @72Hz 48.077 72.188
SVGA 800×600 @75Hz 46.875 75.000
XGA 1024×768 @60Hz 48.363 60.004
XGA 1024×768 @70Hz 56.476 70.069
XGA 1024×768 @75Hz 60.023 75.029
XGA 1024×768 @75Hz 60.241 74.927
XGA 1280×768 @60Hz 47.776 59.870
XGA 1280×768 @60Hz 47.396 59.995
XGA 1280×768 @75Hz 60.289 74.893
SXGA 1280×1024 @60Hz 63.981 60.020
SXGA 1280×1024 @70Hz 74.882 69.853
SXGA 1360x768@60Hz 47.712 60.015
WSXGA 1680×1050 @60Hz 65.290 59.954
WSXGA+ 1680x1050@60Hz 65.290 59.954

22" LCD Color Monitor AOC 2230FH
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4.3. Panel Specification
4.4.1 General Features
4.4.2 Display Characteristics
4.4.3 Electrical Characteristics
TFT LCD Module
Backlight Unit

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4.4.4 Optical Characteristics

22" LCD Color Monitor AOC 2230FH
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5. Block Diagram
5.1 Software Flow Chart
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
N16
17
19
Y
N
18

22" LCD Color Monitor AOC 2230FH
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REMARK:
1) MCU initialize.
2) Is the EEprom blank?
3) Program the EEprom by default values.
4) Get the PWM value of brightness from EEprom.
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 EEprom.
Turn on the LED and set it to green color.
Scalar initialize.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are they’re any signals coming?
13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
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
disappear.
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?

22" LCD Color Monitor AOC 2230FH
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5.2 Electrical Block Diagram
Main Board
Scalar
TSUMO58GDJ-LF
(U401)
D-SUB Input
DVI Input
HDMI Input
Panel interface
Audio
Power

22"LCDColorMonitor AOC2230FH
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6. Schematic
6.1 Main Board
A
Custom
28Tuesday, April 01, 2008 715G2808-D <
称爹 >
1.1.TOP
G2808-1-X-X-3-080401
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
称爹
TP V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
DVI5V
VLCD
TSUMU58J SCHEMATIC
+5V
+5V_USB
PA[0..9]
VCC3.3
INPUT
3.INPUT
RIN
GIN
BIN
VSYNC
GNDR
GNDG
GNDB
HSYNC
SOG
DDCA_SDA
DDCA_SCL
RX0-
RX1+
RX1-
RX2-
RXC-
RX2+
RXC+
RX0+
DVI_SDA
DVI_SCL
DDC_WP
DVI_HPD
DVI5V
DDC_WP
DET_DVI
DET_VGA
+5V
+5V
PANEL INTERFACE
5.PANEL INTERFACE
PB[0..9]
PA[0..9]
VLCD
+5V
VCC3.3
VLCD
POWER
2.POWER
on_PANEL
VLCD
VCC1.8
VCC3.3
+5V
on_BACKLIGHT
adj_BACKLIGHT
+5V_USB
+5V
PB[0..9]
+5V_USB
SCALER
4.SCALER
VCC3.3
VCC1.8
PB[0..9]
HSYNC
GIN
SOG
VSYNC
GNDG
BIN
GNDR
RIN
GNDB
DDCA_SDA
DDCA_SCL
DDCD_SDA
DDCD_SCL
R-
B+
R+
B-
CLK+
CLK-
G+
G-
on_PANEL
+5V
PA[0..9]
DET_INPUT
SW_AUOUT
AUMCKO
AUSCK
AUSDO
AUOUTLR
on_BACKLIGHT
adj_BACKLIGHT
HDMI_SEL
CEC_CTRL
MUTE
VOL
HDMI_HPD
DVI_HPD
VCC3.3
VCC1.8
DVI5V
VCC1.8
AUDIO
7.AUDIO
SW_AUOUT
AUMCKO
AUSCK
AUOUTLR
+5V_USB
AUSDO
MUTE
VOL
HDMI INPUT
6.HDMI INPUT
DDCD_SDA
DDCD_SCL
G-
G+
+5V
CLK-
CLK+
HDMI_SEL
R+
R-
B+
B-RXC-
RX1+
DVI_SDA
RX2-
RX0-
RX2+
RX1-
RX0+
DVI_SCL
RXC+
DDC_WP
CEC_CTRL
HDMI_HPD
VCC3.3
DET_VGA
DET_DVI
DDC_WP
DVI5V
DET_INPUT

22"LCDColorMonitor AOC2230FH
20
VCC3.3 5,7
C115
0.1uF 16V
+5V_USB
U101
NC/AP1117D33LA
1 2 3
ADJ(GND) VOUT VIN
R110
3.3 OHM 2W
Q107 AO4403
1 2 3 4
8 7 6 5
S1 S1 S1 G1
D1 D1 D1 D1
C110
0.1uF 16V
ON/OFF
C103
0.1uF 16V
on_Panel5
VCC3.3
U105
NC/AIC1117A-18PY
1
23
VSS
VOUTVIN
VLCD 6
+5V
C118
NC
C113
NC
Adj_BACKLIGHT 5
+5V_USB8
+
C114
10uF/16V
A
B
38Tuesday, April 01, 2008 715G2808-D <
称爹 >
2.0.POWER
G2808-1-X-X-3-080401
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
+5V_USB
Q104
NC/AO3401
C101
0.1uF 16V
FOR USB
R104
10K 1/16W 5%
Q106
2N3906S-RTK/PS
+5V4,5,7
R116
NC
U104
AIC1117A-18PE
1
23
ADJ
VoutVin
R114 22K 1/16W 5%
VLCD
SOT223
FB102
NC
1 2
CN102
NC
1
2
VCC1.8 5
TO252
R112
10K 1/16W 5%
+5V4,5,7
TO263
VCC3.3
VCC3.3
VCC1.8
SOT223
C106
0.1uF 16V
+
C102
100uF/16V
U102
NC/AIC1084-18PM
23
1
OUTIN
GND
on_BACKLIGHT 5
R103
10K 1/16W 5%
R102 1K 1/16W 5%
+5V
+5V
+5V
R105 22K 1/16W 5%
C112
0.1uF 16V
+
C116
100uF/16V
Q101
2N3904S-RTK/PS
C111
0.22uF
U103
AP1117E33LA
1
23
VSS
VOUTVIN
+
C109
100uF/16V
R101
10K 1/16W 5%
C107
0.1uF 16V
TO252
R115
10K 1/16W 5%
VCC3.3
+
C117
NC/100uF/16V
R113
100K 1/16W 5%
+
C105
100uF/16V
DIM
R111
10K 1/16W 5%
CN101
CONN
1
2
3
4
5
6
7
8
9
10