Acer F1725 Schematic

SERVICE MANUAL

SPECTRUM Series

LCD Monitor

F1725

THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE
EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT
GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION
AND DISCLAIMS RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS,

MANUFACTURE DATE : 2004-2-11

TABLE OF CONTENTS

1. SPECIFICATIONS .................................................................................….…...……….. 3

1-1 GENERALSPECIFICATIONS .…................................................………………... 3

1-2 LCD MONITOR DESCRIPTION ....................................................………….…... 4

1-3 INTERFACE CONNECTOR ......................................................…………………. 4

2. PRECAUTION AND NOTICES ................................................................……………..... 5

2-1 ASSEMBLY PRECAUTION ............................................................…………….... 5

2-2 OPERATIONG PRECAUTION .....................................................……………...... 5

2-3 STORAGE PRECAUTION …...................................................……………........... 5

2-4 HIGH VOLTAGE WARNING .......................................................……………....... 5

3. OPERATING INSTRUCTIONS ..................................................................……………... 6

4. ADJUSTMENT .....................................................................................……………......... 7

4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS ..............………………....... 7

4-2 FRONT PANEL CONTROL KNOBS .........................................………………...... 9

5. CIRCUIT & SOFTWARE DESCRIPTION .............……………………………………..….. 10

5-1 THE DIFFERENT BETWEEN EACH PANEL …………………………………..….. 10

5-2 SIMPLE-INTRODUCTION………………………..…………………………………... 11

5-3 SOFTWARE FLOW-CHART……………………………………………………..….... 13

6. A). INTERFACE-BOARD TROUBLE SHOOTING CHART ..................……………..…... 15

B). INVERTER - MODULE TROUBLE SHOOTING CHART ..................……………...… 22

C). ADAPTER TROUBLE SHOOTING CHART………......………………………………... 34

D). Main-chip GMZAN2 SPECFICATION…………………………………………………….. 35

7. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY....................……………............ 61

8. PARTS LISTING .....................................................................................……………...… 62-76

9. POWER SYSTEM AND CONSUMPTION CURRENT...............................…………….... 76

10. PCB LAYOUT .....................................................................…………………………..….. 77

11. SCHEMATIC ………………………………...…...........................................……………..… 78-82

Page 2 of 82

1. SPECIFICATIONS FOR LCD MONITOR

1-1 General specifications

1. LCD-PANEL :
Active display area 17 inches diagonal

Pixel pitch 0.264 mm x 0.264 mm
Pixel format 1280 x 1024 RGB vertical stripe arrangement

2. Display Color : 8-bit, 16.7 million colors

3. External Controls :Power On/Off, Auto key, Left key, Right key ( for 4-key )
OSD menu Controls: Contrast, Brightness, Focus, Clock, H-position, V-position, Language,
Recall-7800, Recall-6500, Reset,
Exit-OSD, Red, Green, Blue, Selected Dos-resolution

4. Input Video Signal :
Analog-signal 0.7Vpp

Video signal termination impedance 75 OHM

5. Scanning Frequencies :
Horizontal: 29 KHz - 80 KHz
Vertical: 55 Hz – 75 Hz
Pixel clock: 135 MHz

6. Factory Preset Timing : 18
User Timings : 19
Input signal tolerance : H tolerance ±1 K, V tolerance ±1 Hz

7. Power Source :
Switching Mode Power Supply
AC 100 – 240 V, 50/60 Hz Universal Type

8. Operating Temperature : 0℃ - 50℃ Ambient

Non-operating Temperature : -20℃ - 60℃

9. Humidity :

Operating : 20% to 80% RH (non-condensing)
Non Operating : 5% to 95%RH (38.7℃ maximum wet bulb temperature)

10. Weight : 5.5 kg

11. External Connection : 15Pin D-type Connector, AC power-Cord

12. View Angle : x-axis right/left = 60, y-axis up/down = 40 ,60

13. Outside dimension : Width x Height x Thickness = 422x 449 x 215 mm

14. Plug and Play : VESA DDC1/DDC2B

15. Power saving : VESA DPMS

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1-2 LCD MONITOR DESCRIPTION

The LCD MONITOR will contain an main board, an Inverter module, keyboard and External
Adapter which house the flat panel control logic, brightness control logic, DDC and DC-DC
conversion
The Inverter module will drive the backlight of panel .
The Adapter will provides the 12V DC-power 5 Amp to Main-board and Inverter module .

Monitor Block Diagram

CCFL Drive.

Flat Panel and
CCFL backlight

Inverter

Main Board

Adapter

Keyboard

RS232 Connector
For white balance

adjustmen
factory mode

Video signal, DDC

t in

1-3 Interface Connectors

(A) AC-Power Cable
(B) Video Signal Connectors and Cable
(C) External Adapter

AC-IN
100V-240V

HOST Computer

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2. PRECAUTIONS AND NOTICES

2-1 ASSEMBLY PRECAUTION

(1) Please do not press or scratch LCD panel surface with anything hard. And do not soil LCD

panel surface by touching with bare hands (Polarizer film, surface of LCD panel is easy to
be flawed)

In the LCD panel, the gap between two glass plates is kept perfectly even to maintain

display characteristic and reliability. If this panel is subject to hard pressing, the following

occurs :
(a) Uniform color (b) Orientation of liquid crystal becomes disorder
(2) Please wipe out LCD panel surface with absorbent cotton or soft cloth in case of it being

soiled.
(3) Please wipe out drops of adhesive like saliva and water in LCD panel surface immediately.

They might damage to cause panel surface variation and color change.
(4) Do not apply any strong mechanical shock to the LCD panel.

2-2 OPERATING PRECAUTIONS

(1) Please be sure to unplug the power cord before remove the back-cover. (be sure the power

is turn-off)
(2) Please do not change variable resistance settings in MAIN-BOARD, they are adjusted to

the most suitable value. If they are changed, it might happen LUMINANCE does not satisfy

the white balance spec.
(3) Please consider that LCD backlight takes longer time to become stable of radiation

characteristic in low temperature than in room temperature.
(4) Please pay attention to displaying the same pattern for very long-time. Image might stick on

LCD.

2-3 STORAGE PRECAUTIONS

(1) When you store LCD for a long time, it is recommended to keep the temperature between 0

℃-40℃ without the exposure of sunlight and to keep the humidity less than 90% RH.

(2) Please do not leave the LCD in the environment of high humidity and high temperature

such as 60℃ 90%RH.

(3) Please do not leave the LCD in the environment of low temperature; below -15℃.

2-4 HIGH VOLTAGE WARNING

The high voltage was only generated by INVERTER module, if carelessly contacted the
transformer on this module, can cause a serious shock. (the lamp voltage after stable around
600V, with lamp current around 8mA, and the lamp starting voltage was around 1500V, at
Ta=25℃)

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3. OPERATING INSTRUCTIONS

This procedure gives you instructions for installing and using the LM700 LCD monitor display.

1. Position the display on the desired operation and plug–in the power cord into External

Adapter AC outlet. Three-wire power cord must be shielded and is provided as a safety
precaution as it connects the chassis and cabinet to the electrical conduct ground. If the AC
outlet in your location does not have provisions for the grounded type plug, the installer
should attach the proper adapter to ensure a safe ground potential.

2. Connect the 15-pin color display shielded signal cable to your signal system device and

lock both screws on the connector to ensure firm grounding. The connector information is
as follow:

PIN NO.

1. RED 9. 5V power from VGA-card

2. GREEN 10. GND

3. BLUE 11. SYNC. GND

4. GND 12. SDA

5. GND 13. HORIZ. SYNC

6. GND-R 14. VERT. SYNC

7. GND-G 15. SCL

8. GND-B

DESCRIPTION

1

6

11 15

15 - Pin Color Display Signal Cable

5

10

PIN NO.

DESCRIPTION

3. Apply power to the display by turning the power switch to the "ON" position and allow about

thirty seconds for Panel warm-up. The Power-On indicator lights when the display is on.

4. With proper signals feed to the display, a pattern or data should appear on the screen,

adjust the brightness and contrast to the most pleasing display, or press auto-key to get the
best picture-quality.

5. This monitor has power saving function following the VESA DPMS. Be sure to connect the

signal cable to the PC.

6. If your F1725 LCD monitor requires service, it must be returned with the power cord &

Adapter.

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4. ADJUSTMENT

4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS

Adjustments should be undertaken only on following function : contrast, brightness focus, clock,
h-position, v-position, red, green, blue since 6500 color & 7800 color.

4-2 ADJUSTMENT METHOD

Press MENU button to activate OSD Menu or make a confirmation on desired function, Press
Left/Right button to select the function or done the adjustment.

1. White-Balance, Luminance adjustment

Approximately 30 minutes should be allowed for warm up before proceeding white balance

adjustment.

1.How to do the Chroma-7120 MEM .Channel setting

A、Reference to chroma 7120 user guide

B、Use “ SC” key and “ NEXT” key to modify xyY value and use “ID” key to modify the

TEXT description Following is the procedure to do white-balance adjust

2、Setting the color temp. You want

A、MEM.CHANNEL 3 C2 ( 7800 color):

7800 color temp. parameter is x = 296 ±10, y = 311 ±10, Y = 200 ±10 cd/m

B、MEM.CHANNEL 4 C1 ( 6500 color):

6500 color temp. parameter is x = 313±10, y = 329 ±10, Y =200 ±10 cd/m2)

3、Into factory mode of F1725

A、Press MENU button during 2 seconds along with press Power button will activate the

factory mode, then MCU will do AUTO LEVEL automatically. Meanwhile press MENU
the OSD screen will located at LEFT TOP OF PANEL.

4、Bias adjustment :

2 ,

Set the Contrast

Adjust the Brightness

to 70

to 90.

5、Gain adjustment :

Move cursor to “-F-” and press MENU key
A、Adjust C2(7800) color-temperature

1、Switch the Chroma-7120 to RGB-Mode (with press “MODE” button )

2、Switch the MEM. channel to Channel 3 ( with up or down arrow on chroma 7120 )

3、The LCD-indicator on chroma 7120 will show x = 296 ±10, y = 311 ±10,

Y = 200 ±10 cd/m2

4、Adjust the RED of color1 on factory window until chroma 7120 indicator reached

the value R=100

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5、Adjust the GREEN of color1 on factory window until chroma 7120 indicator reached

the value G=100

6、Adjust the BLUE of color1 on factory window until chroma 7120 indicator reached

the value B=100

7、Repeat above procedure ( item 4,5,6) until chroma 7120 RGB value meet the

tolerance =100±2

B、Adjust C1(6500) color-temperature

1、Switch the chroma-7120 to RGB-Mode (with press “MODE” button )

2、Switch the MEM .channel to Channel 4( with up or down arrow on chroma 7120 )

3、The LCD-indicator on chroma 7120 will show x = 313 ±10, y = 329 ±10,

Y = 200 ±10 cd/m

2

4、Adjust the RED of color3 on factory window until chroma 7120 indicator reached

the value R=100

5、Adjust the GREEN of color3 on factory window until chroma 7120 indicator reached

the value G=100

6、Adjust the BLUE of color3 on factory window until chroma 7120 indicator reached

the value B=100

7、Repeat above procedure ( item 4,5,6) until chroma 7120 RGB value meet the

tolerance =100±2

C、Press reset key and Turn the Power-button “off to on” to quit from factory mode.

2. Clock adjustment

Set the Chroma at pattern 63 (cross-talk pattern) or WIN98/95 shut-down mode (dot-

pattern).

Adjust until the vertical-Stripe-shadow as wide as possible or no visible.

This function is adjust the PLL divider of ADC to generate an accurate pixel clock

Example : Hsyn = 31.5KHz Pixel freq. = 25.175MHz (from VESA spec)

The Divider number is (N) = (Pixel freq. x 1000)/Hsyn

From this formula, we get the Divider number, if we fill this number in ADC register (divider

register), the PLL of ADC will generate a clock which have same period with above Pixel

freq.(25.175MHz) the accuracy of this clock will effect the size of screen.(this clock was

called PIXEL-CLOCK)

3. Focus adjustment

Set the Chroma at pattern 63 (cross talk pattern) or WIN98/95 shut down mode (dot-

pattern).

Adjust the horizontal interference as less as possible

This function is adjust the phase shift of PIXEL-CLOCK to acquire the right pixel data .

If the relationship of pixel data and pixel clock not so match, we will see the horizontal

interference on screen ,we only find this phenomena in crosstalk pattern or dot pattern ,

other pattern the affect is very light

4. H/V-Position adjustment

Set the Chroma to pattern 1 (crosshatch pattern) or WIN98/95 full-white pattern confirm

above item 2 & 3 functions (clock & focus) was done well, if that 2 functions failed, the H/V

position will be failed too. Adjust the four edge until all four-edges are visible at the edge of

screen.

5. MULTI-LANGUAGE function

There have 5 language for selection, press “MENU” to selected and confirm , press “ LEFT”

or “ RIGHT” to change the kind of language ( English , Deutch , Francais, Espanol, Italian)

6. Reset function

Clear each old status of auto-configuration and re-do auto-configuration ( for all mode)

This function also recall 7800 color-temperature , if the monitor status was in “ Factory-

mode” this reset function will clear Power-on counter ( backlight counter) too.

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7. OSD-LOCK function

Press Left & Right key during switching on the monitor, the access to the OSD is locked,

user only has access to “ Contrast, Brightness, Auto-key “.

If the operator pressed the Left & Right during switching on the monitor again , the OSD is

unlocked.

8. View Power-on counter and reset the Power-on counter( if not necessary , no suggest to

entry factory mode)

The Power-on counter was used to record how long the backlight of panel already working,

the backlight life time was guarantee minimal 25000 hours, the maintainer can check the

record only in factory mode.

Press MENU button for 2 seconds along with plug-in DC power cord will be in factory mode,

and the OSD screen will located at left top of panel but take cautions don’t press icon “78”

& “65”, if you press 78/65 , your white-balance data will overlap with the new-one, and you

must perform the white-balance process again.

The result of counter was place at top of OSD, the maximal of record memory was 65000

hours, if exceed 65000 hours the counter will keep in 65000 hours until press “ RESET” at

osd-menu in factory mode.

The “ RESET” function in factory mode will execute following function:

1. clear the Power-on counter to zero hours

2. clear old auto-configuration status for all mode , so the monitor will automatically re-do
auto-config when change to next mode or power on-off

4-2 FRONT PANEL CONTROL KNOBS

Power button : Press to switch on or switch off the monitor.
Auto button : to perform the automatic adjustment from CLOCK, FOCUS, H/V POSITION, but no

affect the color-temperature
Left/Right button : select function or do an adjustment.
MENU button : to activate the OSD window or to confirm the desired function

5.CIRCUIT-DESCRIPTION

5-1 SPECIAL FUNCTION with PRESS-KEY

A). press Menu button during 2 seconds along with plug-in the DC Power cord:

That operation will set the monitor into “Factory- mode”, in Factory mode we can do the
White balance adjustment with RS232 , and view the Backlight counter (this counter is use to
record the panel activate hours ,for convenient the maintainer to check the panel backlight
life time)
In Factory mode, OSD-screen will locate in left top of screen.
Press POWER-button off to on once will quit from factory mode and back to
user-mode.

B). Press both Left & Right button along with Power button off to on once will activate the

OSD-LOCK function, repeat this procedure will disable OSD-LOCK
In OSD-LOCK function, all OSD function will be lock , except Contrast and Brightness

OSD-INDEX EXPLANATION

1. CABLE NOT CONNECTED: Signal-cable not connected.

2. INPUT NOT SUPPORT:
a. INPUT frequency out of range: H > 81kHz, v > 75Hz or H < 28kHz, v < 55Hz
b. INPUT frequency out of VESA-spec. (out of tolerance too far)

3. UNSUPPORT mode, try different Video-card Setting:
Input frequency out of tolerance, but still can catch-up by our system (if this message show,
that means, this is new-user mode, AUTO-CONFIG will disable)

Page 9 of 82

5-2 SIMPLE-INTRODUCTION

1. GMZAN2 ( all-in-one chip solution for ADC, OSD, scalar and interpolation) :
USE for computer graphics images to convert analog RGB data to digital data with
interpolation process, zooming, generated the OSD font , perform overlay function and
generate drive-timing for LCD-PANEL.

2. M6759 (ALI- MCU, type 8052 series with 64k Rom-size and 512 byte ram) :
Use for calculate frequency, pixel-dot , detect change mode, rs232-communication, power­consumption control, OSD-index warning , …etc.

3. 24LC21 (MicroChip IC) :
EEPROM type, 1K ROM-SIZE, for saving DDC-CONTENT.

4. 24C04 (ATMEL IC) :
EEPROM type, 4K ROM-SIZE, for saving AUTO-config data, White-balance data, and
Power-key status and Backlight-counter data.

5. LM2569S( NS brand switching regulator 12V to 5V with 3A load current) .

6. AIC 1084-33CM (AIC brand linear regulator 5V to 3.3V)

7. LVDS ( use NOVATEK NT7181F)

Convert the TTL signal to LVDS signal
The advantage of LVDS signal is : the wire can be lengthen and eliminate wire number , low
EMI .

LVDS signal is high frequency but low voltage, only 0.35 VPP ,the frequency is seven times
higher than TTL

MODULE-TPYE COMPONENT :

1. ADAPTER : CONVERSION-module to convert AC 110V-240V to 12VDC, with 5.0 AMP

2. INVERTER : CONVERSION-module to convert DC 12V to High-Voltage around 1600V, with
frequency 30K-80Khz, 7mA-9Ma

Page 10 of 82

Input analog RGB &
H,V,& ddc signal &
Rs232 communication

DDC-chip

DC 12V 5Amp

EXTERNAL­ADAPTER

GMZAN1 (U200)

Oscillator 50 mhz

MCU ( U302 )

Main-board Block diagram

Communication signal:
Hclk,Hfs,Hdata0

Keyboard module

Data Digital RGB

Panel Control Signal:
Dhs, Dvs, Dclk

Crystal 20 mhz

LVDS chip (U601,
U602)

Panel Power 5V

Panel-Power Control
(U202)

INVERTER module

PANEL

Page 11 of 82

5-3 SOFTWARE FLOW CHART

I. Power-On Subrotine CHART

Page 12 of 82

II. MAIN SUBROTINE LOOP

Main loop start

Process Power-saving status ( according to below flow-chart result)

Check GMZAN IFM status .is change or not.
And check Signal cable status ( cable not connected or not )
** IFM is the register which measured the HSYN & Vsyn status

Yes, IFM have change

Is current system status in Power-saving ?

Check the IFM result is in the standard
Mode table ?

Check the IFM result is in the user mode
table ?

Out of range ( input not support) be
confirm

confirm the frequency ( Hsyn or Vsyn) from IFM already

been changed ? ( check the change mode flag)

Process ( turn off OSD , setting GMZAN1according to
above parameter,set LED status, set backlight status)

Check Auto-config mode flag already been set?

Read Key status and Process on OSD-screen

Check Factory mode flag= 1

Monitoring the time-out of osd status ( if no key input persist for
10 sec , the osd time-out counter will trigger )

)

Wake-up GMZAN1
(because GMZAN1 was in
partial sleeping state)

Set mode index & parameter
Set change mode flag

Do Auto-config
automatically

if the RS232 buffer is full,
process the command( while
adjust white-balance in factory
mode)

Page 13 of 82

6. A). Interface-Board Trouble-Shooting chart

*Use the PC Win 98 white pattern, with some icon on it, and Change the Resolution to 640x480 60 Hz / 31

KHz

**NOTICE : The free-running freq. of our system is 48 KHz / 60 Hz, so we recommend to use another

resolution to do trouble shooting, this trouble shooting is proceed with 640x480 @60Hz 31Khz

I. NO SCREEN APPEAR

DC-Power Part

Page 14 of 82

Page 15 of 82

II (a) THE SCREEN is Abnormal , stuck at white screen, OSD window can’t
appear, but keyboard & LED was normal operation.

At general, this symtom is cause by missing panel data or panel power, so we must
check our wire-harness which connected to panel or the panel power controller
(U202)

Page 16 of 82

II. (b)The screen had the Vertical Straight Line, might be stuck in Red, Green, Blue

That symptom is cause by bad Panel issue ( might be the Source IC from Panel is cold
solder or open loop ) so REPLACE THE PANEL TO NEW ONE.

Page 17 of 82

p

POWER-BLOCK check

**Note : the Waveform of U304 pin 2 can determined the power situation

1. stable rectangle waveform with equal duty, freq around 150K-158KHz
that means all power of this interface board is in normal operation
,and all status of 5V & 3.3V is working well

2. unstable or uneven rectangle waveform without same duty, that means
ABNORMAL operation was happened, check 3.3V or 5V ,if short-circuit or bad
component

3. rectangle waveform with large spike & harmonic pulse on front side , means all

3.3v is no load, U200 GmZAN2 was shut-down, and only U302 MCU still
working , that means the monitor is in power saving status , all power system is
working well .

Measure input power at U304 LM2596 pin 1=
12V ?

NG

Check ADAPTER and connector if loose?

Check U304 pin 2 is a stable rectangle wave?
Around 150k-158kHz stable rectangle wave
with equal duty without any spike or harmonic
pulse?

The interface board power is good

NG

Check U304 pin 2 is a unstable rectangle wave ?

OK, unstable wave

Check all 3.3V & 5V power, there is
short circuit or bad component was
happened

The interface board is in power­saving state, press power key to wake
up & check your signal input

NG, with
harmonic

ulse

Page 18 of 82

pei)

III.ALL SCREEN HAS INTERFERENCES OR NOISE, CAN’T BE FIXED BY AUTO KEY

** NOTE: There is so many kind of interferences, 1). One is cause by some VGA-CARD

that not meet VESA spec or power grounding too bad that influence our circuit

2).other is cause by external interferences, move the monitor far from electronic
equipment.( rarely happened)

Use DOT-pattern, or win98/99 shut-down
mode pattern, press “AUTO” key, was the
interferences disappear ??

Adjust “FOCUS” step by step, until the
horizontal interferences disappear

Does your signal-cable have an additional
cable for extension ??

Does your noise only exist in one mode only?
(ex: only at 1280x1024 @ 75 Hz, other is normal)

That was cause by you VGA-CARD setting, your VGA
card timing backporch/frontporch exceed vesa timing too
far, for some new AGP-VGA-CARD such situation
always happened
So in your control-panel icon ,select monitor ,setting ,

advance ,screen-adjust,at
Size icon, increase step by step slowly, press “”AUTO”

key every step you increase the SIZE . repeat the
procedure( increase/decrease SIZE one-step and press
AUTO) until the interferences disappear, press “APPLY”
to save in your VGA

NO additional extension cable

Yes, only happened on one mode

Yes, has extension

END

END

Put away the additional cable
May be the additional cable grounding is
not quite well

Change the Signal-cable to new-one or
Try other brand VGA-CARD
(make sure just only that brand VGA­CARD has this problem ,contact RD­tai

Page 19 of 82

There is an interferences in DOS MODE
NOTE :the criteria of doing AUTO-CONFIGURATION : must be a full-size screen, if the
screen not full , the auto-configuration will fail. So in dos mode ,just set your “CLOCK” in
OSD-MENU to zero or use some EDITOR software which can full fill the whole screen
(ex: PE2, HE) and then press “AUTO” Or you can use “DOS1.EXE” which attached in
your Driver disk to optimize DOS mode performance

V. THE PANEL LUMINANCE WAS DOWN

Use white pattern and resolution 1280x1024 @ 60Hz , CHROMA 7120 measured the center of panel

Set Contrast, brightness =maximal, RGB= 50
Quit from OSD-screen, measured Y(luminance)
With chroma 7120, check Y= 240±10 CD/M2 ?

If Y can reach ＞190 cd/m2 that means
The lamp still working well, so we just re-do the

white-balance process
As following procedure

Adjust VR201 until maximal, measured Y =
240±10 cd/m2 ?

Use white-pattern, press MENU button along
with AC power-plug in ( you will in factory
mode) The OSD-menu will be at left-top of
screen,

If the Y less than 160 cd/m2 (after the VR201=
MAX, contrast, brightness = max) then change the
LAMP of panel

press AUTO button to automatically adjust
blacklevel value, you will see the sign PASS ,if
FAIL , manual adjust the blacklevel until value 43 !

Set contrast, brightness to max, and turn the VR201
to max , wait for 20 minutes until the luminance Y
stable
The Y should be larger than 200 cd/m2
(for panel which already use for a year, the Y
luminance might be a little down, around 180
cd/m2, there is acceptable too)

Follow this manual page 7 item 4-2 method to
more detail procedure for do a white-balance
adjust

Page 20 of 82

6.B).Inverter –MODULE Spec &Trouble Shooting Chart

MODEL NAME: IN7425A1

TOP VICTORY ELECTRONICS (TAIWAN) Co., Ltd.

THE SPECIFICATION OF HYDIS & SAMSUNG17” DC TO AC INVERTER

Page 21 of 82

1. TABLE OF CONTENTS

1-1 PART NUNBER

1-2 APPLICATION

1-3 GENERAL CONDITION

1-4 CONNECTOR PIN ASSIGMENT

1-5 ELECTRICAL CHARACTERISTICS

1-6 SCHEMATIC

1-7 FUNCTION TEST CIRCUIT DIAGRAM

1-8 BURN IN CYCLE

1-9 FUNCTION TEST BLOCK DIAGRAM

1-10 FUNCTION TEST LIST

1-11 LABEL

TOP VICTORY ELECTRONICS (TAIWAN) Co., Ltd.

THE SPECIFICATION OF HYDIS & SAMSUNG 17” DC TO AC INVERTER

Page 22 of 82

2. PART NO.: AOC: IN7425A1

3. APPLICATION: This document defines requirements tested for the
CCFL inverter of the TFT-LCD panel and used HYDIS(HT17E11-300) &
SAMSUNG(P170EUL01) 17” 4 Lamps

4. GENERAL CONDITION:

3-1. Operating ambient temperature ----- 0℃ ~ +40℃

3-2. Operating humidity --------------------- 95% MAX. R.H.
3-3. Storage ambient temperature ------- -40℃ ~ +70℃

3-4. Storage humidity ------------------------ 95% MAX. R.H.

3-5. M.T.B.F. ------------------------------------ 50000 hrs

4.CONNECTOR PIN ASSIGMENT:

4-1. CON1: INPUT

MODEL NO.: 33L3802-5H

PIN SYMBOL DESCRIPTION

1 Vin Input voltage: 12 V

2 Vin Input voltage: 12 V

3 NO/OFF ON: 3V OFF:0V

4 Dimming Dimming range (0V~+5.0V)

5 GND GND

4-2. CON2, CON3, CON4, CON5OUTPUT
MODEL NO.: 33A8021-2-J

PIN SYMBOL DESCRIPTION

1 HV OUTPUT Input H.V to lamps

2 RETURN Return to control

Page 23 of 82

TOP VICTORY ELECTRONICS (TAIWAN) Co., Ltd.

THE SPECIFICATION OF HYDIS & SAMSUNG 17” DC TO AC INVERTER

5.ELECTRICAL CHARACTERISTICS:

The data test with the set of AOC, and the test circuit is as below.

5-1. MAX BRINGTHNESS (Vadj:5.0v), LOAD=120K

ΩX4

(ROOM TEMPERATURE 25℃ ±4℃)

ITEM

SYMBOL MIN. TYP. MAX. UNIT REMARK

Input voltage Vin 10.8 12 13.2 V

Input current Iin 2250 2530 mA

Output Current Iout 6.0 6.5 7.0 mA

Frequency

H.V open Vopen 1600 1750 1900 Vrms

Start voltage Vst 1750 1850 1950 Vrms

H.V Load Vload 680 780 880 Vrms

F 51.0

56.0 61.0 KHZ

Protect delay time PDT

2.5 3.5 -- Sec

FOR 4 LOAD

FOR 1 LOAD

FOR 1 LOAD

NO LOAD

FOR CCFL

RL=120KΩ

5-2. MIN BRINGTHNESS (Vadj:0.0v), LOAD=120K

ΩX4

(ROOM TEMPERATURE 25℃ ±4℃)

ITEM

SYMBOL MIN. TYP. MAX. UNIT REMARK

input voltage Vin 10.8 12 13.2 V

input current Iin 750 880 mA

Output Current Iout 3.3 3.8 4.3 mA

Frequency

H.V open

Start voltage

H.V Load Vload 350 450 550 Vrms

F 51.0

Vopen

Vst

1600 1750 1900 Vrms

1750 1850 1950 Vrms

56.0 61.0 KHZ

FOR 4 LOAD

FOR 1 LOAD

FOR 1 LOAD

NO LOAD

FOR CCFL

RL=120KΩ

Page 24 of 82

TOP VICTORY ELECTRONICS (TAIWAN) Co., Ltd.

THE SPECIFICATION OF HYDIS & SAMSUNG 17” DC TO AC INVERTER

6.SCHEMATICS

TP4

1

HVO

TP6

PT1

5 9

1

2K

3,4

2
6

71

80AL17T-3-YS

D7

R38

12K

TP5

PT2

5 9

RLS4148

1

HVO

R40

51K

R30

R31

2K

2K

3,4

2
6

71

80AL17T-3-YS

D8

R41

51K

RLS4148

R39

12K

TP1

TP2

CON1

Vin
Vin

ENB

DIM

GND

33A3802-5H

TP3

C23

C1

+

150U/25V

F1

4A/63V

1

Vin

1

ENA

1
2
3

R1

4

30K

5

1

DIM

+

150U/25V

R2
10K

0.1U/25V

R7
OPEN

C7

4.7U/16V
R5
47K
C5

0.1U/25V

C2

REF

U1

CTRT1IN+

TL1451AC OR BA9741F

C8

1234567

330P/50V

R4
10K

R6
47K

R3

C3

0.1U/25V

10K

C6

0.1U/25V

SCP

R8

2IN-

2IN+

1IN-

R9 4.7K

R11 15K

DTC144WKA

4.7K

C9

1U/25V

2FBK

1FBK

C10

1U/25V

Q1

R10
15K

10111213141516

2OUT

2DTC

1DTC

1OUT

GND Vcc

8 9

AOC (Top Victory) Electronics Co., Ltd.

Title

FOR HYUNDAI 4LAMPS .INVERTER

Size Document Number Rev

A

Date: Sheet

Thursday, April 04, 2002

IN7425A1(715A917-1-5)

22

of

DTA144WKA

C4

0.1U/25V

A

Q3 SI4431ORAO4403

1

Q2

2
3
4

R16

R12

220

3.9K

R14

3.9K

SST3904

R18 470

C11
1U/25V

Q5

SST3906

L1 150UH

8
7
6
5

D3
11B

R20 15K

D1

SR240

Q7

R22 12K

R24
2K

23

Q9

1

2SC5706 OR2SD2098

Q10

1

2SC5706 OR 2SD2098

R252KR262KR27

C13

0.18U/100V

2 3

C21

0.47U/25V

R282KR29

23

Q11

1

2SC5706 OR 2SD2098

Q12

1

2SD2098

2K

C14

0.18U/100V

R13

3.9K

R15

3.9K

Q4 SI4431OR AO4403

1
2
3
4

R17
220

Q6

SST3904

R19

470

C12
1U/25V

SST3906

L2 150UH

8
7
6
5

D4
11B

R21 15K

D2

SR240

Q8

R23 12K

2 3

is power GND

C22

0.47U/25V

is signal GND

HVL

1U/25V

C15

22P/3KV

C16

22P/3KV

R32
1K(1206)

C19

1U/25V

C17

22P/3KV

C18

22P/3KV

R33
1K(1206)

C20

BAV99

R34 510

BAV99

R35 510

R37 510

CON2

1

2

SM02B-BHSS-1-TB

CON3

1

2

SM02B-BHSS-1-TB

D5

1

TP7
HVL

TP8
HVL

R36

1

510

CON4

1

2

SM02B-BHSS-1-TB

CON5

1

2

SM02B-BHSS-1-TB

1

D6

TP9

HVL

Page 25 of 82