Asus VW198T - 19" LCD Monitor User manual

19"LCDColorMonitor ASUS VW198T
1
Service
Service
Service
Horizontal Frequency
30-82 KHz
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
Revision List.….............................................……......2
Important Safety Notice.……..................……......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.OSD Menu…………….…...........................…............7
4.Input/Output Specification............……………............11
4.1.Input Signal Connector............………….................11
4.2.Power Supply Requirements...............................12
4.3.Factory Preset Display Modes……..........................13
4.4.Panel Specification.....………...…………..................14
5.Block Diagram…..….....................…………................16
5.1.Software Flow Chart……………………....….......16
5.2.Electrical Block Diagram……………..….......18
6.Schematic……………......................................20
6.1.Main Board………..........................................20
6.2.Power Board...……....................................24
6.3.Audio Board...……....................................26
7.PCB Layout..………….......................................27
7.1.Main Board………........................................27
7.2.Power Board….......................................30
7.3.Audio Board….......................................32
7.4.Key Board…………….....................................33
8.Maintainability……….......................................34
8.1.Equipments and Tools Requirement...............34
8.2.Trouble Shooting…………..............................35
9.White-Balance, Luminance adjustment.............41
10.Monitor Exploded View………..…….…............43
11.BOM List…………………………………............44
12.Different Parts List……………………............64
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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19"LCDColorMonitor ASUS VW198T
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Revision List
Version Release Date Revision History TPV Model Name
T97MMANCPWUSDN
A00 Oct.11, 2007 Initial release
T97MMANDPWUSDZ
A01Jun.26, 2008 Add new BOM T97MMANBPWU1D
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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 by AOC 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 as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock,
fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
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 radiation when open AVOID 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.)
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19"LCDColorMonitor ASUS VW198T
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1. Monitor Specifications
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2. LCD Monitor Description
The LCD monitor will contain a main board, an audio board, a power board and a key board 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.
Monitor Block Diagram
AC-IN
100V-240V
Power board
(
Include: ada
p
ter
,
inverter
)
Flat Panel and
CCFL backlight
Main Board RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
Video signal, DDC
Key Board
Audio Board
HOST Computer
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3. Operating Instructions
3.1 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.
3.2 Control Buttons
3.2.1 Key Control
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3.2.2 Key Function
3.3 OSD Menu
3.3.1 How to Reconfigure
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3.3.2 OSD Function Introduction
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4. Input/Output Specification
4.1 Input Signal Connector
Analog connectors
Pin No. Description Pin No. Description
1. Red Video 9. +5V
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
15
610
11 15
DVI connectors
Pin No. Description Pin No. Description Pin No. Description
1. RX2- 9. R X1- 17. RX0-
2. RX2+ 10. RX1+ 18. RX0+
3. RX2 Shield 11. RX1 Shield 19. RX0 Shield
4. NC 12. NC 20. NC
5. NC 13. NC 21. NC
6. DDC Clock 14. +5V Power 22. RX Clock Shield
7. DDC Data 15. Ground 23. RX Clock+
8. NC 16. Hot Plug Detection 24. RX Clock-
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4.2 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
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19"LCDColorMonitor ASUS VW198T
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4.3 Factory Preset Display Modes
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4.4 Panel Specification
4.4.1 General Features
M190Z1-L01 is a 19” wide TFT Liquid Crystal Display module with 4 CCFL Backlight unit and 30 pins
2ch-LVDS interface. This module supports 1680 x 1050 WSXGA+ mode and can display 16.7M colors.
The inverter module for Backlight is not built in.
- Super Wide viewing angle.
- Super High contrast ratio
- Super fast response time
- High color saturation
- WSXGA+ (1680 x 1050 pixels) resolution
- DE (Data Enable) only mode
- LVDS (Low Voltage Differential Signaling) interface
- RoHS Compliance
4.4.2 Display Characteristics
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4.4.3 Optical Characteristics
4.4.4 Electrical Characteristics
(1) TFT-LCD
(2) Backlight
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5. Block Diagram
5.1 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
N16
17
19
Y
N
18
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1) MCU initialize.
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) 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?
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5.2 Electrical Block Diagram
5.2.1 Main Board
Flash Memory
PM25LV010A
(U402)
Panel Interface
(CN301)
SCK
SCZ
Crystal
14.31818MHZ
(X201)
Keypad Interface
(CN201)
Scalar TSUMU58BWHL-LF
(Include MCU, ADC, OSD)
(U202)
D-Sub
Connector
(CN101)
EEPROM
AF24BC02
(U101)
H sync
V sync
RGB
DDC1_SDA,
DDC1_SCL
DVI
Connector
(CN103)
EEPROM
AF24BC02
(U102)
D-Data
D-Clock
DDC2_SDA,
DDC2
_
SCL
EEPROM
AF24BC16-SI
(U204)
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5.2.2 Inverter/Power Board
DIM
EMI filter
Start Circuit: R904, R932, R933
PWM
Control IC
Transformer
AC input
12V
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
（IC801）
Over Voltage
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6. Schematic
6.1 Main Board
715G2698-3
HPD_CTRL 2
HOT_PLUG
C115
0.1uF/16V
VGA_B+
VGA_B+
DSUB_5V
FB103
0 OHM
1 2
R119 100R 1/16W
D114
BAV99
3
1 2
DDC1_SCL
R118
10K 1/16W
D104
BAV99
3
1 2
C104
NC
R138 0R05 1/16W
VCC3.3
D112
BAV99
3
1 2
R101 0R05 1/10W 5%
DVI_5V
DSUB_R+ 2
RX2P
C110
0.047uF
R127 10R 1/16W
C106
1000pF
DSUB_V 2
VGA_PLUG
VGA_G+
U102
M24C 02-W MN6TP
1
2
3
45
6
7
8A0
A1
A2
VSSSDA
SCL
WP
VCC
C118
0.1uF/16V
VGA_R+
C121
0.1uF/16V
C114
0.22uF16V
FB101
0 OHM
1 2
C109
0.047uF
CMVCC
R104
56 OHM 1/16W
D108
RLZ5.6B
R140
1K 1/16W
RX2N
R129 10R 1/16W
DSUB_R- 2
VGA_R-
C103
22pF
DVI_HPD
R139 0R05 1/16W
C108
NC
D106
RLZ5.6B
R133 10R 1/16W
C112
0.1uF/16V
CN101
DB15
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
17 16
DSUB_5V
DDC2_SCL
R102 1K 1/16W
DDC2_SCL
R136 10R 1/16W
R117 100R 1/16W
C124
0.1uF/16V
R112
75R 1/16W
R137
10K 1/16W
ZD102
RLZ5.6B
DET_CABLE 2
ZD106
RLZ5.6B
DSUB_5V
R123 10K 1/16W
R125
NC
R121
4K7 1/16W
R122 100R 1/16W
RX0P
U101
M24C 02-W MN6TP
1
2
3
45
6
7
8A0
A1
A2
VSSSDA
SCL
WP
VCC
R116
75R 1/16W
DDC1_SCL
R108 100R 1/16W
C101
0.047uF
R120
4K7 1/16W
T97MMADN8WU2D 3
ASUS VW198T B
25Thursday , August 16, 2007
715G2698-3 <
称爹 >
2.0.INPUT
G2698-3-X-X-10-070816
OEM MODEL Size
Rev
Date Sheet of
TPV MOD EL
PCB NAME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
R105
2K2 1/16W 5%
RX2N 2
R124
NC
ZD104
RLZ5.6B
ZD101
RLZ5.6B
RX0P 2
RX0N 2
DSUB_B- 2
R130 10R 1/16W
ZD105
RLZ5.6B
VGA_B-
D118
RLZ5.6B
D109
RLZ5.6B
RX1P
D110
BAV99
3
1 2
R103 1K 1/16W
DDC2_SDA 2
VGA_G+
Q101
NC
R126 10R 1/16W
VGA_R-
R115
56 OHM 1/16W
RX0N
RXCN
R113
100R 1/16W
R114 100R 1/16W
C107
0.047uF
RX1P 2
D103
BAV99
3
1 2
VGA_G+
CN103
JACK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
26 25
DAT2-
DAT2+
2/4shield
DAT4-
DAT4+
DDC SCL
DDC SDA
VSY NC
DAT1-
DAT1+
1/3shield
DAT3-
DAT3+
+5V
SYNC GND
HPD
DAT0-
DAT0+
0/5shield
DAT5-
DAT5+
clk shield
clk+
clk-
GND GND
R110
100R 1/16W
RXCP 2
DVI_5V
DDC2_SDA
DDC2_SDA
FB102
0R05 1/10W 5%
CMVCC
DSUB_B+ 2
D105
BAV70
3
1 2
VGA_R+
R132
10K 1/16W
C116
0.22uF16V
RXCN 2
D116
BAV99
3
1 2
DDC_WP2
VGA_PLUG
R109 470R 1/16W
DDC1_SCL2
VGA_G-
R131 10R 1/16W
DDC1_SDA
R135
4K7 1/16W
RXCP
ZD103
RLZ5.6B
CMVCC
DDC1_SDA2
GND POWER
DDC1_SDA
R106
2K2 1/16W 5%
D113
BAV99
3
1 2
R111
56 OHM 1/16W
C102
22pF
CMVCC
DSUB_G- 2
D101
BAV70
3
1 2
93G 64 42 P
VGA_B+
DGND
DVI_HPD
RX1N RX1N 2
R134
4K7 1/16W
C123
0.1uF/16V
R107
75R 1/16W
VGA_R+
DSUB_H 2
VGA_B-
VGA_G-
D115
BAV99
3
1 2
C125
0.1uF/16V
D117
BAV99
3
1 2
C120
0.1uF/16V
C119
0.1uF/16V
C113
0.047uF
C117
0.1uF/16V
DDC2_SCL 2
C111
NC
DDC_WP2
C105
0.047uF
DSUB_SOG 2
DSUB_G+ 2
D111
BAV99
3
1 2
D107
RLZ5.6B
D102
BAV99
3
1 2
C122
0.1uF/16V
RX2P 2
R128 10R 1/16W
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