6.2 W eight...........................................................................................................................................11
Appendix: Physical Dimension Front View and Side view 14
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Engineering Specification
1. Introduction
This specification describes Q9T4, which is a 19.0” analog/digital interface color TFT LCD monitor without
audio. The monitor supports up to 1280x1024 pixel resolution and refresh rate of 75 Hz. The independent 6 bits
R, G, B colors are capable of displaying 262K colors (scaler dithering output 16.2M colors). In addition,
(typ.)
Panel spec.
With 15-pin D-sub connector
With 24-pin DVI-D connector
scaler dithering output 16.2M
colors
At CCFL 7mA & R/G/B
saturated condition
90-264 Volts, 47-63 Hz.
1W in power off preferred
<
mode, 120V
2W, 240V
<
Green/Amber/Non
8 languages
6 buttons including 1 monitor
power on/off control button.
“iKey” function
DDC2B only
From -5 to +20 degree
dithering function is supported. The features summary is shown below,
*All panel spec. in C201 definition depends on the variance of panel source.
Feature items Specifications Remark
Panel supplier & module name
Screen diagonal 19.0” (480mm) 376.32(H) x 301.056(V)
Display Format SXGA / 1280 (H) x 1024 (V)
Pixel Pitch 0.294 mm x 0.294 mm per one triad
Viewing Angle (@ Contrast Ratio = 10)
Analog interface with Scaling supported
DVI interface with Scaling supported
Video interface with Scaling supported No
Max resolution mode supported 1280 x 1024 @ 75Hz
umber of Display Colors supported
Contrast Ratio
Luminance
AC power input
DC power input (with AC power adapter) No
DPMS supported
LED indicator for power status showed
OSD for control & information supported
Multi-language supported for OSD
Buttons control supported
Flywheel control supported No
Scaling function supported
Auto adjustment function supported
DDC function supported (EDID ver. 1.3)
Audio speakers supported
Audio Jack (input connector) supported
Earphone Jack (input connector) supported
Microphone function supported No
Mechanical Tilt base design
VESA wall mounting design
Mechanical Rotate design No
Mechanical Lift base design No
Kensington compatible lock design
AUO M190EN04 V.2
R/L: 70/70 degrees (typ.)
and U/D: 70/65 degrees (typ.)
Yes
Yes
262K colors
450:1 (typ.)
250 cd/m
2
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
Yes
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Q9T4-FP91G LCD Monitor Service Guide
2. Operational Specification
2.1 Power supply
Item Condition Spec OK N.A Remark
Input Voltage range
Input Current range
Power Consumption
DPMS
Inrush Current
Earth Leakage Current
Hi-Pot
Power Line Transient
CCFL operation range
Universal input full range90~264VAC /47~63Hz
90 ~ 264VAC < 2.0 Arms
Normal “On” operation
DPMS “Off” state
110 VAC
220 VAC
264 VAC/50Hz < 3.5 mA
1. 1500VAC, 1 sec
2. Ground test: 30A, 1sec
IEC1000-4-4 1KV √
IEC1000-4-5 (Surge)
90 ~ 264VAC 3.0 mA ~7.5mA
Engineering Specification
< 40 W (w/o speaker)
<
1 W in power preferred
mode, 120V
2 W, 240V
<
< 30 A (peak)
< 60 A (peak)
Without damage
< 0.1 ohm
Common: 2KV,
Differential: 1KV
√
√
LED: Green
√
LED: Amber
√
Cold-start
√
√
(on-line test)
√
√
√
(in-lab test)
Depends on panel
source
CCFL Frequency
Power cord
2.2 Signal interface
Item Condition Spec OK N.A Remark
Signal Cable
Pin assignment
Sync input
90 ~ 264VAC 40KHz ~ 80KHz
15-pin D-Sub
24-pin DVI-D
15-pin D-sub connector
24-pin DVI-D connector
Signal type
Level
Impedance
Signal type
Level
Impedance
Sync Pulse Width (SPW)
Logic High: 2.4V ~ 5.5V
Logic Low: 0V ~ 0.5V
Color: Black
Length: 1500
Color: Black
Length: 1500
Color: Black
Length: 2000
See Note-1
See Note-2
Separate analog R/G/B
700 mV (peak to peak)
75 Ohms +/- 1.5 Ohms
Separate H/V-sync
Composite H/V-sync
(Positive/Negative)
(TTL level)
Minimum 2.2K
0.7μs < H-SPW
1H < V-SPW
+/- 50 mm
+/-
30 mm
+/-
50 mm
Ω(pull down)
√
√
√
√
√
√
√
√
√
√
√
√
√
Depends on panel
source
For 15-pin D-sub
For 24-pin DVI-D
For 15-pin D-sub
Video input
For 15-pin D-sub
Refer to VESA VSIS
Standard V1R1
10KΩ for application
Note-1: The pin assignment of 15-pin D-sub connector is as below,
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Q9T4-FP91G LCD Monitor Service Guide
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Engineering Specification
6
1115
10
Pin Signal Assignment Pin Signal Assignment
1 Red video 9 PC5V (+5 volt power)
2 Green video 10 Sync Ground
3 Blue video 11 Ground
4 Ground 12 SDA
5 Cable Detected 13 H-Sync (or H+V)
6 Red Ground 14 V-sync
7 Green Ground 15 SCL
8 Blue Ground
Note-2: The pin assignment of 24-pin DVI-D connector is as below,
Note-3: “P”, “N” stands for “Positive”, “Negative” polarity of incoming H-sync/V-sync (input timing).
√
√
3. Operational & Functional Specification
3.1 Video performance
Item Condition Spec OK N.ARemark
Resolution
Contrast ratio
Brightness
Response time
Viewing angle
CIE coordinate of White
Display colors
Any input resolution modes
which are under 1280 x 1024
450:1 (typ.)
At R/G/B saturated condition250 cd/m2 (typ.) @ 7mA
Rising + Falling time 12 ms (typ.)
At Contrast ratio = 10 R/L: 70/70 degrees (typ.)
At Contrast ratio = 10 U/D: 70/65 degrees (typ.)
(0.31, 0.33) +/- (0.03, 0.03)
262K colors
1280 x 1024
√
√
√
√
√
√
√
√
3.2 Brightness Adjustable Range
Item Condition Spec OK N.ARemark
Brightness adjustable range
At default contrast level
(saturate point) & Full-white
color pattern
(Max. brightness value –
Min. brightness value)
≧ 100 cd/㎡
√
A
PARC2
scaler dithering
output 16.2M
colors
3.3 Acoustical Noise
Item Condition Spec OK N.ARemark
Acoustical Noise
3.4 Environment
Item Condition Spec OK N.ARemark
Temperature
Humidity
Altitude
At 1 meter distance
& “Audio” function disabled
Operating
Non-operating
Operating 10 ~ 90%
Non-operating 10 ~ 90%
Operating 0~3048m (10,000ft)
Non-operating 0~12,192m (40,000ft)
≦ 40 dB/A
0 ~ +40 ℃
-20 ~ +60 ℃
√
√
√
Non-condensing
√
Non-condensing
√
Without packing
√
With packing
√
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Q9T4-FP91G LCD Monitor Service Guide
p
3.5 Transportation
Item Condition Spec OK N.ARemark
(1) Vibration
(2) Unpackaged Vibration
(3) Drop
(4) Shock
Package, Non-Operating
Unpackaged, Non-Operating
Package, Non-Operating
Wooden package,
Non-Operating
Engineering Specification
(1) Sine wave
5~200Hz 1.5G, 1 octave/min,
15 min dwell on each resonant
frequency, all primary axis,
one sweep (30 min minimum)
er orientation, total of 90+
min.
(2) Random
5 ~100 Hz, 0 dB/Oct. 0.015
2
/Hz
g
100 ~200 Hz, -6 dB/Oct.
200 Hz, 0.0038 g
Equivalent to 1.47 Grms, All
primary axis, 20 min perorientation, total is 60 min.
(3) Procedure:
Confirmed sample with
appearance and function ready
before testing then compare
with after test record as
brightness, uniformity and
contrast ratio. Perform
random vibration after
sine-wave vibration test.
Test Spectrum:
20 Hz 0.0185(g2/Hz)
200Hz 0.0185(g2/Hz)
Duration : 5 Minutes
Axis : 3 axis ( Horizontal
and Vertical axis ,Z axis)
91 cm Height (MP stage)
(1 corner, 3 edges, 6 faces)
Waveform: half sine
Faces: 6 sides/ per orientation
3 shocks.
Duration: <3ms
Velocity accelerate: 75g
2
/Hz
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√
√
3.6 Electrostatic Discharge Requirements
Item Condition Spec OK N.ARemark
Electrostatic Discharge
IEC801-2 standard
Contact: 8KV
Air: 15KV
√
3.7 EMC
Item Condition Spec OK N.ARemark
Electric
TCO03
Magnetic
EMI
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FCC part 15J class B
Band 1 < 10 V/m
Band 2 < 1 V/m
Band 1 < 200nT
Band 2 < 25nT
After Mass production under
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Q9T4-FP91G LCD Monitor Service Guide
Engineering Specification
EN55022 class B
1dBuv for constant measure.
Besides DNSF and VCCI
class-2 are optional.
3.8 Reliability
Item Condition Spec OK N.ARemark
MTBF Prediction
CCFL Life time
Refer to MIL-217F > 60,000 Hours
At 25±2℃, under 7.0mA
50,000 Hours (typ.)
√
√
Excluding CCFL
Note-4: CCFL lifetime is determined as the time at which brightness of lamp is 50%. The typical lifetime of
CCFL is on the condition at 7.0±0.5mA lamp current.
4. LCD Characteristics
4.1 The Physical definition & Technology summary of LCD panel
Item Condition Spec OK N.ARemark
LCD Panel Supplier
Panel type of Supplier
Screen Diagonal
Display area
Physical Size
Weight
Unit=mm 376.32(H) x 301.056(V)
Unit=mm 396(H) x 324(V) x 18(D) (typ.)
Red x 0.604 0.634 0.664
Red y 0.324 0.354 0.384
Green x 0.27 0.3 0.3
Green y 0.585 0.615 0.645
Blue x 0.108 0.138 0.168
Blue y 0.047 0.077 0.107
White x 0.28 0.31 0.34
White y 0.30 0.33 0.36
65
65
65
60
250 450
70 75 -
70
70
70
65
-
-
-
-
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Q9T4-FP91G LCD Monitor Service Guide
Engineering Specification
White Luminance @ CCFL
7.5mA (center)
Crosstalk (in 75Hz)
* The test methods for the above items’ definition, please refer to the relative panel specification.
[cd/m2]
[%]
200 250 -
1.5
5. User Controls
5.1 User’s hardware control definition
Item Condition Spec OK N.ARemark
Power button
Enter button
Right/Inc. button
Left/Dec. button
Exit /Volume or Input Select
button
iKey button
Mode button
Mute button
√
√
√
√
√
√
√
√
5.2 OSD control function definition
Item Condition Spec OK N.ARemark
Auto Adjust
Brightness
Contrast
Horizontal Position
Vertical Position
Pixel Clock
Phase
Color
OSD Position
OSD Time
Language
Recall
Mode
Input Select
Sharpness
Auto-Geometry
Bluish
Reddish
Normal
: Separate R/G/B adjustment
User
OSD Horizontal position
OSD Vertical position
From 5 sec to 60 sec
8 languages
Color recall
Recall All
D-sub
DVI
√
√
√
√
√
√
√
√
√
√
√
√
√
√
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Q9T4-FP91G LCD Monitor Service Guide
Engineering Specification
Display Information
Volume
Mute
Hot key for Brightness
Hot key for Contrast
Hot key for Volume
Hot key for Input Select
Hot key for Mode
* The detailed firmware functions’ specification, please refer to C212 S/W spec. document.
For input timing
√
√
√
√
6. Mechanical Characteristics
6.1 Dimension
Item Condition Spec OK N.ARemark
Bezel opening
Monitor without Stand
Monitor with Stand
Carton Box (outside)
Blue Angel German Standard
E-2000 Switzerland
EPA USA Standard
TCO’99
TCO’03
Green Mark
Microsoft Windows PC98/99
DPMS VESA
DDC 2B Version 1.3
USB External
UL (USA) UL60950 3rd edition
CSA (Canada) CAN/CSA-C22.2 No. 60950
Nordic / D.N.S.F EN60950
FIMKO EN60950
CE Mark 73/23/EEC
IEC60950
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
Safety
EMC
X- Ray Requirement
EN60950
CB
TUV/GS
CCC (China)
GOST EN60950
SASO
CE Mark 89/336/EEC
FCC (USA) FCC Part 15 B
EN60950
EN60950 /
EK1-ITB 2000:2003
√
√
√
√
√
√
√
√
EN55022 Class B
√
CISPR 22 Class B
VCCI (Japan) VCCI Class B
BSMI (Taiwan) CNS 13438
C-Tick (Australia) AS/ NZS CISPR22
DHHS (21 CFR) USA X- Ray Standard
√
√
√
√
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Engineering Specification
√
PTB German X- Ray standard
TUV / Ergo
Ergonomics
ISO 13406-2
prEN50279
Appendix: Physical Dimension Front View and Side view
Fig. 1 Physical Dimension Front View and Side view
√
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Q9T4 TROUBLE SHOOTING GUIDE
1. No Display or display is unstable
Interface Board -
Y
N
Y N
o picture or picture
unstable
Power off?
Does cable plug in
connector?
Is power stable?
N
Trouble Shooting
Turn on power.
Plug all wires then turn on power again.
Check power BD.
Y
N
Is LED light green?
Y N
Does DVI signal work?
Y
+
+
Check control BD.
Check (U1) DDC data.
N
Is LED status normal?
Check MCU (U4) or replace it.
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Y N
Trouble Shooting
Does crystal work
correctly?
Y N
Is LED status normal?
Y
N
Does LVDS cable
connect to panel?
Y
Check Panel or replace it.
Check crystal (Y2) CKT or replace it.
Replace interface BD or check scaler TSU56AL (U2).
1. ALIGNMENT PROCEDURE (FOR FUNCTION ADJUSTMENT)......................................................................................................2
The list of necessary alignment for a LCD monitor ...................................................................................................................2
A. Preparation............................................................................................................................................................................2
B. Geometry adjustment & checking (for preset timing modes).................................................................................................2
C. ADC calibration (White Balance)..........................................................................................................................................2
D. Color temperature measurement...........................................................................................................................................3
E. Writing EDID data into monitor............................................................................................................................................3
F. Command definition...............................................................................................................................................................3
1 Geometry adjustment & checking For Preset timing modes
2 ADC calibration (White balance adjustment) UVGA7 (1024x768/75Hz)
3 Color temperature measurement C1/Bluish, C2/Reddish & C3/Normal
4 Writing EDID data into monitor Analog/DVI-D
A. Preparation
1. Setup input timing to any preset modes or patterns.
2. Enter factory mode (press “Exit” & “Enter” & “Power” buttons at the same time to turn on monitor).
3. Press “iKey” into “Burn In Mode” tag and select “On” to enable burn-in mode.
4. Power off the monitor, remove the input source and then power on again.
5. Setup unit and keep it warm up for at least 30 minutes.
B. Geometry adjustment & checking (for preset timing modes)
1. Enter factory mode (press “Exit” & “Enter” & “Power” buttons at the same time to turn on monitor).
2. Select timing mode from figure-1 and input full screen display pattern to monitor.
3. Select “Auto Adjust” to run “AUTO” function for geometry adjustment.
4. Check if the position, phase and clock of the image are correct to make sure controlled functions and performance are
O.K..
5. Select “Recall All ” to erase user settings.
6. Turn off the monitor power.
7. Turn on the monitor power again to check if monitor’s image settings are O.K. and with following settings.
CONTRAST = 50
BRIGHTNESS = 90
COLOR = Normal (default setting)
OSD time = 20
Figure-1: Preset Timing modes list
Input Timing Actual Output
Resolution
720x400 31.47(N) 70.08(P) 28.32 1280x1024 √ DOS
800x600 46.87(P) 75.00(P) 49.5 1280x1024 √ VESA
1024x768 48.36(N) 60.00(N) 65.00 1280x1024 √ VESA
1024x768 60.02(P) 75.00(P) 78.75 1280x1024 √ VESA
1152x870 68.68(N) 75.06(N) 100.00 1280x1024 √ Mac
1152x900 71.81(N) 76.14(N) 108.00
1280x1024 80.00(P) 75.00(P) 135.00 1280x1024 √ VESA
1280x1024 81.18(N) 76.16(N) 135.09 1280x1024 √ SUN
Horizontal
Frequency (KHz)
C. ADC calibration (White Balance)
~~Analog only, it is not required for DVI-D input source
Vertical
Frequency (Hz)
Dot Clock
Frequency (MHz)
Actual display
Resolution
1280x1024 √ VESA
OK N.A Remark
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Alignment Procedure
1. Setup input timing UVGA7 (1024x768/75Hz), pattern 42 (5-Mosaic pattern with white color block) with Analog
signals from Chroma video pattern generator. (it depends on Scaler IC supplier’s recommendation)
2. Enter factory mode (press “Exit” & “Enter” & “Power” buttons at the same time to turn on monitor).
3. Press “iKey” into “Burn In Mode” tag and select “On” to enable burn-in mode.
4. Change color temperature from “Normal” (default) to “User Preset”.
5. Press hot-key “CONTRAST” to run “White Balance” function. (This procedure will get optimal gain/offset (clamp)
values)
Checking if the picture is O.K., or reject this monitor and check its circuit board or wire/cable connection.
6.
D. Color temperature measurement
1. Setup input timing ICL-605 (1280x1024/75Hz), pattern 41 (full white color pattern) with Analog signals from
Chroma video pattern generator.
2. Make sure ADC calibration (White Balance) had already been done.
3. Measure color temperature C1/Bluish, C2/Reddish & C3/Normal to meet following spec. requirement by Minolta CA110 (or equivalent equipment).
Color temperature X+- 0.283+(-) 0.03
(C1/9300K/Bluish set on OSD) Y+- 0.297+(-) 0.03
Color temperature X+- 0.326+(-) 0.03
(C2/5800K/Reddish set on OSD) Y+- 0.342+(-) 0.03
Color temperature X+- 0.313+(-) 0.03
(C3/6500K/sRGB set on OSD) Y+- 0.329+(-) 0.03
4. Turns off the monitor power.
E. Writing EDID data into monitor
1. Setup a PC with DDC card.
2. Connect PC to monitor with a D-sub signal cable.
3. Please refer to the C212 for the correct EDID file.
4. Runs the writing program to write the analog EDID data into EEPROM for analog input (ie. 15-pin D-sub).
5. Repeat step 4 and write the digital EDID data into EEPROM for DVI-D input (ie. 24-pin DVI-D).
6. Read both EEPROM data and confirm it to match with the C212 definition.
(Note: The DVI-D input may not operation correctly if the digital EDID data do not exist.)
F. Command definition
PC Host will send 0x7C IIC slave address and then following 4 bytes command
I2C Send Command Byte1 Byte2 Byte3 Byte4 OK N.A. Remark
Write Contrast to MCU RAM CA 55 Data cksum
Write Brightness to MCU RAM CA 56 Data cksum
Write Red Gain to MCU RAM CA 57 Data cksum
Write Green Gain to MCU RAM CA 58 Data cksum
Write Blue Gain to MCU RAM CA 59 Data cksum
Read Contrast from MCU RAM C3 55 XX cksum
Read Brightness from MCU RAM C3 56 XX cksum
Read Red Gain from MCU RAM by color index C3 57 XX cksum
Read Green Gain from MCU RAM by color
index C3 58 XX cksum
Read Blue Gain from MCU RAM by color index C3 59 XX cksum
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√
√
√
√
√
√
√
√
√
√
Write data to MCU RAM and
update the related register to
refresh the screen immediately.
Don’t store data to EEPROM.
Base on current color index to
read back the right gain value.
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Q9T4-FP91G LCD Monitor Service Guide
Write C1 (Bluish) R-Gain Data to EEPROM AA 3C Data
Write C1 (Bluish) G-Gain Data to EEPROM AA 3D Data cksum
Write C1 (Bluish) B-Gain Data to EEPROM AA 3E Data cksum
Write C2 (sRGB) R-Gain Data to EEPROM AA 4C Data cksum
Write C2 (sRGB) G-Gain Data to EEPROM AA 4D Data cksum
Write C2 (sRGB) B-Gain Data to EEPROM AA 4E Data cksum
Write C3 (Reddish) R-Gain Data to EEPROM AA 5C Data cksum
Write C3 (Reddish) G-Gain Data to EEPROM AA 5D Data cksum
Write C3 (Reddish) B-Gain Data to EEPROM AA 5E Data cksum
Write User R-Gain Data to EEPROM AA 6C Data cksum
Write User G-Gain Data to EEPROM AA 6D Data cksum
Write User B-Gain Data to EEPROM AA 6E Data cksum
Write Cx R-Gain Data to EEPROM AA 7C Data cksum
Write Cx G-Gain Data to EEPROM AA 7D Data cksum
Write Cx B-Gain Data to EEPROM AA 7E Data cksum
Write Contrast to EEPROM AA 92 Data
Write Brightness to EEPROM
Write C/T index to EEPROM
Write OSD-Hpos to EEPROM
Write OSD-Vpos to EEPROM AA 96 Data
Write Language to EEPROM
Write EEPROM OSD Timer
Write EEPROM Volume
Write EEPROM Gamma index AA 9A Data
Write OSD Transparency to EEPROM
Write OSD Rotation to EEPROM AA 9F Data cksum
Read C1 (Bluish) R-Gain data from EEPROM A3 3C XX cksum
Read C1 (Bluish) G-Gain data from EEPROM A3 3D XX cksum
Read C1 (Bluish) B-Gain data from EEPROM A3 3E XX cksum
Read C2 (sRGB) R-Gain data from EEPROM A3 4C XX cksum
Read C2 (sRGB) G-Gain data from EEPROM A3 4D XX cksum
Read C2 (sRGB) B-Gain data from EEPROM A3 4E XX cksum
Read C3 (Reddish) R-Gain data from EEPROM A3 5C XX cksum
Read C3 (Reddish) G-Gain data from EEPROM A3 5D XX cksum
Read C3 (Reddish) B-Gain data from EEPROM A3 5E XX cksum
Read User R-Gain data from EEPROM A3 6C XX cksum
Read User G-Gain data from EEPROM A3 6D XX cksum
Read User B-Gain data from EEPROM A3 6E XX cksum
Read Cx R-Gain data from EEPROM A3 7C XX cksum
AA
AA
AA
AA
AA
AA
94 0~4
95 Data
97 0~7
98 Data
99 Data
9E Data cksum
cksum
cksum
cksum
cksum
cksum
cksum
cksum
√
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√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
4=User, 5=Cx
0=DE, 1=EN, 2=ES, 3=FR,
4=IT, 5=JA, 6=繁中, 7=簡中
(Also Update MCU RAM)
For model with Gamma curve
selection function
√
√
√
Reserved for some model have
√
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Q9T4-FP91G LCD Monitor Service Guide
And
Alignment Procedure
Read Cx G-Gain data from EEPROM A3 7D XX cksum
Read Cx B-Gain data from EEPROM A3 7E XX cksum
Read Contrast from EEPROM A3 92 XX
Read Brightness from EEPROM A3 93 XX
Read C/T index from EEPROM A3 94 XX
Read OSD-Hpos EEPROM A3 95 XX
Read OSD-Vpos from EEPROM A3 96 XX
Read Language from EEPROM A3 97 XX
Read OSD Timer from EEPROM A3 98 XX
Read Volume from EEPROM A3 99 XX
Read Gamma index from EEPROM A3 9A XX
cksum
cksum
cksum
cksum
cksum
cksum
cksum
cksum
cksum
√
√
√
√
√
√
√
√
Read OSD Transparency from EEPROM A3 9E XX cksum
Read OSD Rotation from EEPROM A3 9F XX cksum
Change Color Temp. to C1/9300K/Bluish CC 01 XX cksum
Change Color Temp. to C2/6500K/sRGB CC 02 XX cksum
Change Color Temp. to C3/5800K/Reddish CC 03 XX cksum
Change Color Temp. to User CC 04 XX cksum
√
√
√
√
Change Color Temp. to Cx CC 05 XX cksum
Change Input Source to D-Sub CD 01 XX cksum
Change Input Source to DVI CD 02 XX cksum
On burn in mode CE 01 XX cksum
Off burn in mode CE XX* XX cksum
√
√
Monitor is forced power saving CF 01 XX cksum
Monitor wake up from power saving CF XX* XX cksum
User mode to factory mode 1A 5A XX cksum
√
Auto Color (Offset1, Offset2, Gain) 1B 5A XX cksum
Copy EDID Serial number to EEPROM 1C 5A XX cksum
Factory mode to User mode 1E 5A XX cksum
Clear user mode and factory recall 1F 5A XX cksum
Write EDID data to MCU DDC RAM 55 NA NA NA
Copy DDC RAM data to EEPROM BB NA NA NA
√
√
√
√
Drive WP pin to low to enable write DDC IC 55 NA NA NA
Drive WP pin to high to disenable write function BB NA NA NA
EEPROM Bank R/W (For Debug using only, not for Production Line Write EEPROM directly)
Read EEPROM Bank 0 B0
Read EEPROM Bank 1 B1
Read EEPROM Bank 2 B2
Read EEPROM Bank 3 B3
Write EEPROM Bank 0 B8
Write EEPROM Bank 1 B9
Store data to EEPROM
For MTV312 MCU type
For MTV312 MCU type
For stand alone DDC IC
√
For stand alone DDC IC
√
(For 24C08 type)
√
(For 24C08 type)
√
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Write EEPROM Bank 2 BA
Write EEPROM Bank 3 BB
Note A: Byte4 (cksum) = Byte1 + Byte2 + Byte3
Note B: Data = The value write to MCU or EEPROM
Note C: XX = don't care, any value (<=0xFF).
When PC Host sends 0x7D command to MCU, MCU must return as following (2 bytes)
Return Code R-Byte1 R-Byte2
Checksum error code FC AA
Normal return code the above Byte3 (/data) FC
If normal return code is exact FCh FC CF
2. EEPROM mapping
Address
Address
Data cksum
Data cksum
Alignment Procedure
(For 24C08 type)
√
(For 24C08 type)
√
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3. Wire Dressing
- Assembly note
Alignment Procedure
A. Make sure the spring and gaskets are attached on main bracket.
B. Screw up only 3 points on Power BD.
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C. Connect Power BD with I/F BD by wire.
Alignment Procedure
D. Stick yellow tapes on LVDS FFC.
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E. Stick AL foil to cover the gap between panel and main bracket.
Alignment Procedure
F. Fix the main shielding by connector screws.
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G. Add spring between Ctrl BD and panel.
Alignment Procedure
H. Fix the Ctrl BD wire by clip.
4. Add Glue
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C605 (Power BD)
Alignment Procedure
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Circuit Operation Theory
I. Introduction:
The Q9T4 is a 19” SXGA (1280x1024), 262K (R/G/B 6-bit for V.2 version)/16.2M colors (R/G/B 6-bit + FRC
for V.5 version) TFT LCD monitor with multi-media function. It’s a Dual (analog and digital) interface LCD
monitor with a 15 pins D-sub signal cable and a 24 pins DVI-D cable. It’s compliant with VESA specification to
offer a smart power management and power saving function. It also offers OSD menu for users to control the
adjustable items and get some information about this monitor, and the best function is to offer users an easy
method to set all adjustable items well just by pressing one key, we called it “iKey” which can auto adjusting all
controlled items. Q9T4 also offer DDC2 function to meet VESA standard.
II. Block diagram
The Q9T4 consists of a head and a stand (base). The head consists of a LCD module with 4 lamps, a power board
(include AC/DC, DC/DC and inverter board), a control board and an interface board. The block diagram is shown
as below.
LCD module with 4 lamps (backlight)
Inverter
&
Power
Interface
board
Control
board
User control
AC power in
D-Sub DVI-D
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III. Circuit operation theory:
A.) HEAD:
A-1.) Interface board diagram:
Circuit Operation Theory
D-SUB
DVI-D
140MHz
ADC
140MHz
Single Link
TMDS
MTV312
MV64
TSU56AL
Clock
Generator
SXGA
1280×1024
LCM
KeypadIIC
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(a) Circuit operation theory:
A basic operation theory for the interface board is to convert input signal into digital RGB. Analog
RGB signal is converted to digital signal through ADC. DVI-D signal is converted through TMDS
receiver. The microprocessor TSU56AL receives video data and optimizes the image automatically. It
also supports input source selection, maximum 8 multi-color fonts as well as 256 color palette to form
a bitmap OSD, and keypad controlling. The output data are sent to LCD module.
(b) IC introduction:
1) DDC (Display Data Channel) function: We use DDC IC to support DDC2B function. DDC data
is stored in 24C02(EEPROM). Those data related to LCD monitor specification. PC can read
them by “SDA” and “SCL” serial communication for I²C communication for DDC2B.
2) TSU56AL IC: There are A/D, Scaling and OSD functions in the TSU56AL IC. Scaling IC is
revolutionary scaling engine, capable of expanding any source resolution to a highly uniform and
sharp image, combined with the critically proven integrated 8-bit triple-ADC and patented
Rapid-lock digital clock recovery system. It also support detect mode and DPMS control.
Circuit Operation Theory
3) EEPROM: We use 24C04 to store all the adjustable data and user settings, and use 24C02 to
store DVI EDID data.
4) MTV312M64: MCU control unit. It controls all the functions of this interface board, just like the
OSD display setting, the adjustable items, adjusted data storage, the external IIC communication,
support DDC2B.
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A-2.) Power board diagram:
Circuit Operation Theory
EMI Filter Rectifier and
filter
PWM controller
Isolation power
transformer
Switching element
Feedback Isolation
Rectifier and filter
Rectifier and filter
Inverter circuit
LDO regulator
Fig.1
#1 EMI Filter
This circuit (Fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC,
VDE, VCCI standard requirements.
Fig. 2
#2 Rectifier and filter
AC Voltage (90-264V) is rectified and filtered by BD601, C605 (See Fig 3) and the DC Output
voltage is 1.4*(AC input). (See Fig.3)
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#3 Switching element and Isolation power transformer
When the Q601 turns on, energy is stored in the transformer. During Q601 turn-off period, the
stored energy is delivered to the secondary of transformer. R607, C607 and D601 is a
voltage-snubber circuit. R615 is current sense resistor to control output power. (See Fig.4)
Circuit Operation Theory
Fig. 3
Fig. 4
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#4 Rectifier and filter
D701 and C703 C704 are to produce DC output. (See Fig.5)
#5 PWM Controller
The PWM controller NCP1200A implements a standard current mode architecture. With an
internal structure operating at a fixed 40KHz.Where the switch time is dictated by the peak
current setting-point. When the current setting-point falls below a given value. The output power
demand diminish, the IC automatically enters the so-called skip cycle mode and provides
excellent efficiency.
Circuit Operation Theory
Fig. 5
Fig. 6
#6 Feedback circuit
PC123 is a photo-coupler and TL431 is a shunt regulation. They are used to detect the output
voltage change and be the primary and secondary isolation. When output voltage changes, the
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feedback voltage will be compared and duty cycle will be decided to control the correct output
voltage. (See Fig.7)
Max. Output Current: 7.5mA
Min. Output Current: 2mA
Lamp Working Voltage: 700Vrms
Open Lamp Voltage: 1900Vrms
Frequency: 40-80KHz
3.Circuit Operation Theorem
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3.1 ON/OFF SWITCH
The turn-on voltage was controlled by R815 and R816.The inverter was turned on or off
by the switching transistors Q801 and Q802, Also regulator IC801 is control by Q801
and Q802 decide supply 14.5V to inverter part or instead.
Circuit Operation Theory
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3.2 PWM Control circuit
Circuit Operation Theory
TL1451 is a dual PWM controller. C807 and R811 decide the working frequency.
BLT_ADJ signal is from control board, control pulse width then decide how much
energy delivery to CCFL also decide CCFL brightness. Q803 and Q804 be the buffer to
rise the drive capability and the totem poles circuit can improve a capable of driving for
Q805.C813 decide the striking time delay.
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Circuit Operation Theory
3.3 Oscillator Circuit
Royer circuit uses the characteristic of transformer saturation to oscillate. When the DC power
inject, Q808 or Q809 will turns on, and the current Ic increases. After a period, the transistor will
leave the saturation status and Vce increase. The result causes the voltage of primary coil get
lower. Finally the transistor turn off, and another transistor turn on. These statuses are repeated
and the pin7 and pin8 of T801 will get a Sin Wave to turn on CCFL.
A-4.) Control board introduction:
The main parts of the control board are a push button and a LED.
(a) Push button: It’s a simple switch function. Pressing it for “ON” to do the auto adjustment,
select (unselect) adjustment or adjusting bar.
(b) LED: It indicates the DPMS status of this LCD monitor; green light means DPMS on
(Normal operating condition), amber light means DPMS off (Power off condition).
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5
4
3
2
1
Q1
C25
220P J
R8
4.7K
2N390 6
R14
32
1
R1
2K
Q2
2N390 6
1K
1
1
32
32
R9
2K
Q3
2N390 4
R5
47
12
D2
3.3V
3.3V_M
C4
0.1 U
DSU B_SDA
DSU B_SCL
PC5V
12
D3
D4
6.2V
6.2V
12
12
3.3V_ MCU_1
EMI solution
DD
PC5V
PC5 V_OFF
PC 5V + 3.3V PC5 V_OFF
+ - H
+ + L
- + Don' t care
CC
D1
6.2V
3.3V_ MCU
TP5
TP7
TP9
TP10
If both P C5V and +3 .3V exi st:
PC 5V_OFF should set "LOW" to prevent PC5V from
en tering the system .
Wh en only PC5V exis ts:
12
11
12
13
14
15
20240 12A15
D5
6.2V
L6
220 OHM
DN 1
2
BAV99
3
1
TP1
TP2
J1
G1G2
6
1
7
2
8
3
9
4
10
5
R17
10K
12
D6
6.2V
R18
10K
TP3
TP4
TP6
TP8
TP26
R15
100
R16
100
3.3V_ MCU_1
2
1
C9
47P J
DN 3
BAV99
3
C50
0.1 U
R2
75
C10
47P J
DN 4
2
BAV99
3
0.1 U
1
R3
75
DN 2
BAV99
C41
0.1 U
OPENOPENOPEN
CABLE _DETECT
2
C1
3
C57
1
HS YNC
VS YNC
0.0 1U
R4
75
R+
G+
B+
ESD solution
L17
L18
L19
Z60
Z60
Z60
R6
82
C2 0.0 1U K
47
82
47
82
47
C3 0.0 1U K
C5 0.0 1U K
C6 0.0 1U K
C7 0.0 1U K
C8 0.0 1U K
R7
R10
R11
R12
R13
RED -
RED+
GREE N-
GREE N+
BLUE-
BLUE+
PC 5V_OFF should set "HIGH" to provid e CPU powe r.
Ac tually, in the in itial s tate, NO P C5V_OFF, i f VGA
ca ble is connected, PC5V e xists --> Q4 will ON .
Th at will make VCPU = 3.3V .