Asus VW198S User manual

19"LCDColorMonitor ASUS VW198S
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...............................11
4.3.Factory Preset Display Modes……..........................12
4.4.Panel Specification.....………...…………..................13
5.Block Diagram…..….....................…………................15
5.1.Software Flow Chart……………………....….......15
5.2.Electrical Block Diagram……………..….......17
6.Schematic……………......................................19
6.1.Main Board………..........................................19
6.2.Power Board...……....................................23
6.3.Audio Board...……....................................25
7.PCB Layout..………….......................................26
7.1.Main Board………........................................26
7.2.Power Board….......................................29
7.3.Audio Board….......................................31
7.4.Key Board…………….....................................32
8.Maintainability……….......................................33
8.1.Equipments and Tools Requirement...............33
8.2.Trouble Shooting…………..............................34
9.White-Balance, Luminance adjustment.............40
10.Monitor Exploded View………..…….…............42
11.BOM List…………………………………............43
12.Different Parts List……………………............56
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

19"LCDColorMonitor ASUS VW198S
2
Revision List
Version Release Date Revision History TPV Model Name
T97MMGNBPWUSAN
T97MMGNBPWUEAN
A00 Oct.10, 2007 Initial release
T97MMGNTPWUSAZ

19"LCDColorMonitor ASUS VW198S
3
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.)

19"LCDColorMonitor ASUS VW198S
4
1. Monitor Specifications

19"LCDColorMonitor ASUS VW198S
5
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

19"LCDColorMonitor ASUS VW198S
6
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

19"LCDColorMonitor ASUS VW198S
7
3.2.2 Key Function
3.3 OSD Menu
3.3.1 How to Reconfigure

19"LCDColorMonitor ASUS VW198S
8
3.3.2 OSD Function Introduction

19"LCDColorMonitor ASUS VW198S
9

19"LCDColorMonitor ASUS VW198S
10

19"LCDColorMonitor ASUS VW198S
11
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
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

19"LCDColorMonitor ASUS VW198S
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4.3 Factory Preset Display Modes

19"LCDColorMonitor ASUS VW198S
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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

19"LCDColorMonitor ASUS VW198S
14
4.4.3 Optical Characteristics
4.4.4 Electrical Characteristics
(1) TFT-LCD
(2) Backlight

19"LCDColorMonitor ASUS VW198S
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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

19"LCDColorMonitor ASUS VW198S
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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?

19"LCDColorMonitor ASUS VW198S
17
5.2 Electrical Block Diagram
5.2.1 Main Board
Flash Memory
PM25LV010A
(U402)
Panel Interface
(CN301)
SCZ
SCK
Crystal
14.31818MHZ
(X201)
Keypad Interface
(CN201)
Scalar TSUMU18BWL-LF
(Include MCU, ADC, OSD)
(U202)
D-Sub
Connector
(CN101)
EEPROM
AF24BC02
(U101)
H sync
V sync
RGB
VGA_SDA,
VGA_SCL
EEPROM
AF24BC16-SI
(U204)

19"LCDColorMonitor ASUS VW198S
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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

19"LCDColorMonitor ASUSVW198S
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6. Schematic
6.1 Main Board
715G2698-3
R102 1K 1/16W 5%
R112
75R 1/16W 5%
C115
NC
R119 NC
R108 100R 1/16W 5%
VGA_PLUG
RXCP 2
DDC2_SDA
D111
NC
3
1 2
VGA_G+
C116
NC
VCC3.3
DVI_5V
DSUB_B- 2
CN103
NC
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
VSYNC
DAT1-
DAT1+
1/3shield
DAT3-
DAT3+
+5V
SYNC GND
HPD
DAT0-
DAT0+
0/5shield
DAT5-
DAT5+
clk shield
clk+
clk-
GND GND
R125
NC
D104
BAV99
3
1 2
R107
75R 1/16W 5%
C106
1000pF
DDC1_SDA
D116
NC
3
1 2
C124
NC
DVI_5V
DSUB_5V
DDC1_SDA
FB101
0 OHM
1 2
R130 NC
R103 1K 1/16W 5%
T97MMGDN8WU2AN 3
ASUS VW198S B
25Thursday , August 16, 2007
715G2698-3 <
称爹 >
2.0.INPUT
G2698-3-X-X-13-070816
OE M MO DEL 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
DSUB_G- 2
DDC1_SCL
D112
NC
3
1 2
D117
NC
3
1 2
VGA_B+
DVI_HPD
C109
0.047uF
R106
2K2 1/16W 5%
C108
NC
R133 NC
DSUB_SOG 2
VGA_R+
DSUB_G+ 2
VGA_B-
VGA_G-
R101 0R05 1/10W 5%
FB102
0 OHM
1 2
RX0P 2
R117 100R 1/16W 5%
C119
NC
RX0N
VGA_B+
D114
NC
3
1 2
R113
100R 1/16W 5%
C102
22pF
D110
NC
3
1 2
ZD101
RLZ5.6B
R132
NC
R109 470R 1/16W 5%
R118
10K 1/16W 5%
VGA_PLUG
ZD103
RLZ5.6B
RX2P 2
R137
NC
ZD104
RLZ5.6B
R105
2K2 1/16W 5%
DDC2_SDA
R121
4K7 1/16W 5%
DGND
RXCN
R110
100R 1/16W 5%
R111
56 OHM 1/ 16W
DDC2_SCL 2
VGA_R+
C113
0.047uF
C117
NC
C112
0.1uF/16V
R136 NC
DDC_WP2
RX0N 2
ZD106
RLZ5.6B
DDC1_SCL2
VGA_G+
R116
75R 1/16W 5%
RX1P
U101
M24C02-WMN6TP
1
2
3
45
6
7
8A0
A1
A2
VSSSDA
SCL
WP
VCC
DDC2_SDA 2
R120
4K7 1/16W 5%
R127 NC
DSUB_R- 2
VGA_B-
VGA_B+
R104
56 OHM 1/ 16W
R129 NC
R126 NC
C110
0.047uF
C103
22pF
DET_CABLE 2
FB103
0 OHM
1 2
R138 NC
C114
0.22uF16V
DDC2_SCL
CMVCC
C121
NC
Q101
NC
C104
NC
R134
NC
CMVCC
DSUB_R+ 2
DVI_HPD
RXCP
CMVCC
RX2P
VGA_G+
R115
56 OHM 1/ 16W
C105
0.047uF
C101
0.047uF
CN101
DB15
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
17 16
RX1N
VGA_R+
RX1N 2
R135
NC
HOT_PLUG
D105
BAV70
3
1 2
DDC_WP2
DDC1_SDA2
R140
NC
R122 NC
DSUB_5V
DSUB_H 2
VGA_R-
U102
NC
1
2
3
45
6
7
8A0
A1
A2
VSSSDA
SCL
WP
VCC
R128 NC
R123 NC
C118
0.1uF/16V
C111
NC
GND POWER
D107
NC
R131 NC
RX1P 2
VGA_R-
C123
NC
CMVCC
DSUB_B+ 2
D108
NC
ZD102
RLZ5.6B
R114 100R 1/16W 5%
D115
NC
3
1 2
D109
NC
DDC1_SCL
R139 NC
D106
NC
RX2N 2
C120
NC
RXCN 2
DSUB_5V
DSUB_V 2
D102
BAV99
3
1 2
RX2N
ZD105
RLZ5.6B
RX0P
C122
NC
D103
BAV99
3
1 2
DDC2_SCL
VGA_G-
R124
NC
HPD_CTRL 2
D118
NC
D101
NC
3
1 2
D113
NC
3
1 2
93G 64 42 P
C125
NC
C107
0.047uF

19"LCDColorMonitor ASUSVW198S
20
PB0
PA2
PA[0..9]
Q303
NC
LVB0M
RXEC-
RXE0+
RXOC+
T97MMGDN8WU2AN 3
ASUS VW198S A
35Thursday , August 16, 2007
715G2698-3 <
称爹 >
3.0.OUTPUT
G2698-3-X-X-13-070816
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
LVA3P
LVB1M
PA6
LVBCKP
PB3
RXE0-
R305
10K 1/16W 5%
LVA2P
LVB2M
PB1
Q302
AO3401
PPWR_ON#
LVA3M
RXO3+
LVB1P
LVB1P
C305
NC
RXEC+
FB301
120OHM
LVBCKM
PB7
PA4
LVB0P
+
C303
100uF25V
R304
47K 1/16W 5%
D
LVA0M
PA5
1
PA7
CN301
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
RXO3-
RXE3+
3
LVB2P
LVACKM
G
PA[0..9]2
LVB0P
LVB3P
LVA1P
PB[0..9]
CMVCC
RXO1+
LVB0M
2
LVBCKM
PB9
LVA2M
PB8
C301
0.1uF/16V
LVBCKP
Q304
NC
PB6
LVA1M
LVACKP
LVB3P
LVA0M
PB2
R303
NC
LVA0P
R302
330R 1/8W 5%
LVA0P
RXO2-
RXO0+
PA0
RXO1-
R301
10K 1/16W 5%
PANEL_VCC
PA8
RXE2-
RXE2+
C304
NC
LVA1PLVB3M
RXE1-
LVA3M
LVA2M
RXE3-
S
PPWR_ON#2
LVA1M
LVB2MLVA2P
PB4
LVB1M
LVB3M
LVA3P
Q301
2N3906S-RTK/PS
LVACKM
PB5
LVB2P
PA9
RXE1+
LVACKP
RXO0-
PB[0..9]2
PA3
RXO2+
RXOC-
C302
0.1uF/16V
R306 NC
PANEL_VCC
PA1