AOC 2009v Service Manual
20" LCD Color Monitor HP 2009v
Service
Service
Service
Horizontal Frequency
24 – 85 KHz
TABLE OF CONTENTS
Description Page Description Page
Table of Contents.......…..................................…........1
Revision List.…..............................................……......2
1. Monitor Specification............................………........3
2. LCD Monitor Description…..…………………….......4
3. Operation Instructions……..…..............……...........5
3.1 General Instructions...............................…...........5
3.2 Control Buttons………….….............……..............5
3.3 Adjust the Picture..................................…............6
4. Input/Output Specification......……...………............9
4.1 Input Signal Connector...............………................9
4.2 Factory Preset Display Modes.........…..................9
4.3 Power Supply Requirements.................................9
5. Panel Specification.....……...…………..................10
5.1 General Feature…..............................................10
5.2 Electrical Characteristics……………..…………..10
5.3 Optical Characteristics……….……………………11
6. Block Diagram…..…...................………................13
6.1 Software Flow Chart……………….………………...13
6.2 Electrical Block Diagram……...…………..…...........15
7. Schematic…………….…..........................................17
7.1 Main Board..………….............................................17
7.2 Power Board.………………....................................23
7.3 Key Board.…………....……....................................26
8. PCB Layout…...……..…...........................................27
8.1 Main Board………………........................................27
8.2 Power Board………................................................29
8.3 Key Board………............……….….........................30
9. Maintainability………................................................31
9.1 Equipments and Tools Requirement.......................31
9.2 Trouble Shooting………...…...................................32
10. White-Balance, Luminance Adjustment….………..38
11. Mechanical Instructions……………….….....….......40
12. Monitor Exploded View…….... ……..……....….......44
13. BOM List……….……….…………..…………………46
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
1
20" LCD Color Monitor HP 2009v
Revision List
Version Date Revision History TPV Model Name
A00 May-22-09 Initial release TARSABNB5WHPAN
2
20" LCD Color Monitor HP 2009v
1. Monitor Specification
3
20" LCD Color Monitor HP 2009v
2. LCD Monitor Description
The LCD Monitor will contain a main board, a power board, a key 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.
(Include adapter, inverter board)
Power Board
AC-IN
100V-240V
Monitor Block Diagram
CCFT Drive.
Main Board
Key board
Flat Panel and
CCFL backlight
Video signal, DDC
HOST Computer
4
20" LCD Color Monitor HP 2009v
3. Operation Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located at front of the panel.
By changing these settings, the picture can be adjusted to your personal performance.
The power cord should be connected.
-
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 Aqua-blue.
-
3.2 Control Buttons
5
20" LCD Color Monitor HP 2009v
3.3 Adjust the Picture
6
20" LCD Color Monitor HP 2009v
7
20" LCD Color Monitor HP 2009v
8
20" LCD Color Monitor HP 2009v
4. Input/Output Specification
4.1 Input Signal Connector
Pin No. Description Pin No. Description
1 Red Video 9 3.3/+5 V (from PC)
2 Green Video 10 Sync Ground
3 Blue Video 11 None
4 None 12 DDC Data
5 Ground (DDC Return) 13 Horizontal Sync
6 Red GND 14 Vertical Sync
7 Green GND 15 DDC Clock
8 Blue GND
VGA connector layout
PIN 1
PIN 11
4.2 Factory Preset Display Modes
PIN 5
4.3 Power Supply Requirements
Parameter Range
AC Input Voltage 90 to 265V
AC Input Frequency 45 to 63 Hz
Inrush Current 50A at 220VAC and 30A at 120VAC
Leakage Current 300mA Max at 120VAC
9
20" LCD Color Monitor HP 2009v
5. Panel Specification
LTM200KT01 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film
Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light
unit. The resolution of a 20.0” is 1600 x 900 and this model can display up to 16.7 millions solors.
5.1 General Feature
5.2 Electrical Characteristics
10
20" LCD Color Monitor HP 2009v
5.3 Optical Characteristics
Ta= 25±2°C, VDD=5V, fV=60Hz, fDCLK=59.1MHz, IL=6.5mArms
11
20" LCD Color Monitor HP 2009v
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20" LCD Color Monitor HP 2009v
6. Block diagram
6. 1 Software Flow Chart
1
Y
2
N
3
4
5
N
Y
6
N
7
8
Y
9
10
N
11
12
Y
13
N
N
Y
14
15
Y
N
16
Y
17
18
N
19
Y
13
20" LCD Color Monitor HP 2009v
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?
14
20" LCD Color Monitor HP 2009v
(
)
(
)
6.2 Electrical Block Diagram
6.2.1 Main Board
Flash ROM
PM25LV020
(Include: MCU, ADC, OSD etc)
(U402)
Key control Interface
(CN401)
LCD Interface
CN402
Scalar TSUMU18ER3
(U401)
EEPROM
M24C02
U104
Crystal
14.318MHz
(X401)
EEPROM
AT24C04BN
(U403)
D-SUB Connector
(CN101)
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20" LCD Color Monitor HP 2009v
6.2.2 Power Board
AC input
100V~240V
VEMI filter Rectifier
Transformer
Power Switching
Output
Rectifier
5V
16V
Main
Board/Inverter
Circuit
PWM Control IC
Sense Resistor
Photo Couple
Sampling
16V DC
Switching MOS
Transformer
Resonance NET
IC Power Supply
Converter
PWM Control IC Open Lamp Protection
Current Sampling
High Voltage Output
16
20" LCD Color Monitor HP 2009v
7. Schematic
7.1 Main Board
715G3281 1
TSUMU18ER3 SCHEMATIC
LVDS OUTPUT
VCC3. 3
CMVCC
VCC3. 3
VCC1. 8
VCC3. 3
02.Input
VCC1. 8
VCC3. 3
CMVCC
05.Power
DSUB_R+
DSUB_RDSUB_G+
DSUB_G-
DSUB_SOG
DSUB_B+
DSUB_B-
DSUB_H
DSUB_V
DDC1_SDA
DDC1_SCL
DET_CABLE
DDC_WP
MU TE
VOLUME
on_BACKLI GHT
BKLT_VBRI
DSUB_R+
DSUB_RDSUB_G+
DSUB_GDSUB_SOG
DSUB_B+
DSUB_B-
DSUB_H
DSUB_V
DDC1_SDA
DDC1_SCL
DET_CABLE
DDC_WP
MU TE
VOLUME
on_BACKLIGH T
BKLT_VBRI
03.Sca lar
VCC1.8
VCC3.3
CMVCC
AudioSelf test_L
AudioSelf test_R
PA[0..1]
PA[4..9]
PB[0..9]
PPWR_ON #
VCC 1.8
VCC 3.3
PA[0..1]
PA[4..9]
PB[0..9]
CMVCC
AudioSelf test_L
06.Audio
PA[4..9]
PPWR_ON #
04.Output
AudioSelf test_R
PA[0..1]
CMVCC
PB[0..9]
CMVCC
T P V ( Top Victory Electronics Co . , Ltd. )
絬 隔 瓜 絪 腹
Key Component
Date
01.TOP 715G3281-E
OE M MOD E L Si ze
TPV MO DE L
PCB NAME
Sheet
16Friday , Decem ber 05, 2008
of
17
Rev
称爹
A
E
<
称爹
>
20" LCD Color Monitor HP 2009v
C103
22pF
ZD102
RLZ5.6B
1 2
ESD_VCC
DGND
R102 1K 1/16W 5%
R103 1K 1/16W 5%
DSUB_5V
1 2
CMVCC
DSUB_5V
2
3
C115
0.22uF16V
U104
1
A0
VCC
2
A1
3
A2
4 5
VSS SDA
M24C02-WMN6TP
SCL
DSUB_H 5
DSUB_V 5
VGA_B+
VGA_B-
VGA_G+
VGA_G-
VGA_R+
VGA_R-
1
D101
BAV70
R121
10K 1/16W 5%
8
7
WP
6
DDC1_SCL
DDC1_SDA
T P V ( Top Victory Electronics Co . , Ltd. )
絬 隔 瓜 絪 腹
Key Component
Date
FB101
1 2
BEAD
FB102
1 2
BEAD
FB103
1 2
BEAD
02.Input
DDC_WP 5
R107
75R 1/16W 5%
R115
75R 1/16W 5%
R118
75R 1/16W 5%
R104
100R 1/16W 5%
C104
5pF/50V
R110
100R 1/16W 5%
R112
470R 1/16W 5%
R114
100R 1/16W 5%
C108
5pF/50V
R116
100R 1/16W 5%
R117
100R 1/16W 5%
C111
5pF/50V
R119
100R 1/16W 5%
VGA_PLUG
OEM MODEL Size
TPV MODEL
PCB NAME
Sheet
715G3281-E
26Monday, D ecember 22, 2008
VCC3.3
of
C102
0.047uF
C105
0.047uF
C106
1000pF
C107
0.047uF
C109
0.047uF
C110
0.047uF
C112
0.047uF
VCC3. 3 5, 7
R120
10K 1/16W 5%
DET_CABLE 5
DSUB_B+ 5
DSUB_B- 5
DSUB_SOG 5
DSUB_G+ 5
DSUB_G- 5
DSUB_R+ 5
DSUB_R- 5
Rev
称爹
B
E
称爹
>
<
R101 0R05 1/10W 5%
H_Sync
V_Sy nc
ESD_VCC
R108
VGA_R+
VGA_G+
R109
4K7 1/16W 5%
R111
100R 1/16W 5%
100R 1/16W 5%
DGND
U101
1
I/O1
I/O4
2
GND
VDD
3 4
I/O2 I/O3
AZC099-04S
U102
1
I/O1
I/O4
2
GND
VDD
3 4
I/O2 I/O3
AZC099-04S
DSUB_SCL
DSUB_SDA
6
H_Sync
5
V_Sy nc
6
5
VGA_B+
4K7 1/16W 5%
DDC1_SCL5
DDC1_SDA5
DDC1_SCL
DDC1_SDA
GND POW ER
DSUB_SCL
DSUB_SDA
15
14
13
12
11
ESD_VCC
ESD_VCC
2K2 1/16W 5%
CN101
17 16
C113
NC
C114
NC
R105
R106
2K2 1/16W 5%
10
5
DSUB_5V
9
4
VGA_B-
8
VGA_B+R113
3
7
VGA_GVGA_G+
2
6
VGA_RVGA_R+
1
C101
22pF
ZD101
RLZ5.6B
VGA_PLUG
close to U102
18
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