Acer AL711, AL716, AL712 SERVICE GUIDE

AM777/778/677/678 TFT LCD MONITOR CONTENTS

AM777/778/677/678 TFT LCD MONITOR CONTENTS................................................................................... 1

INTRODUCTION.......................................................................................................................................... 3

1.1 Scope ....................................................................................................................................................................3

1.2 Description ........................................................................................................................................................... 3

2. ELECTRICAL REQUIREMENTS................................................................................................................. 4

2.1 Standard Test Conditions ..................................................................................................................................... 4

All tests shall be performed under the following conditions, unless otherwise specified. ............................................4

2.2 LCD monitor General specification ..................................................................................................................... 4

2.3 LCD Panel Specification ...................................................................................................................................... 5

2.4 Input Signals....................................................................................................................................................... 12

Supported Timing........................................................................................................................................................ 13

2.5 CONTROLS ........................................................................................................................................................ 16

2.6 White Color Temperature................................................................................................................................... 18

2.7 POWER SUPPLY ...............................................................................................................................................19

2.8 Plug & Play(EDID)............................................................................................................................................ 20

2.9 Audio Technical specification (AM777/677 Only) ............................................................................................. 20

3. VL-713 DISPLAY CONTROL BOARD...................................................................................................... 21

3.1 Description ......................................................................................................................................................... 21

3.2 Features.............................................................................................................................................................. 21

3.3 BLOCK DIAGRAM ............................................................................................................................................ 22

System Block Diagram................................................................................................................................................ 22

3.4 Connector Locations ..........................................................................................................................................22

3.5 Connector Type ..................................................................................................................................................23

3.6 Connector pin assignment .................................................................................................................................. 23

4. VK-713 Control Panel Board ................................................................................................................... 26

4.1 Description ......................................................................................................................................................... 26

4.2 Connector and Switch Locations........................................................................................................................ 26

4.3 Connector type.................................................................................................................................................... 26

4.4 Connector pin Assignment.................................................................................................................................. 26

4.5 Switch definition .................................................................................................................................................27

4.6 LED definition .................................................................................................................................................... 27

5. POWER SUPPLY & INVERTER BOARD ................................................................................................. 28

5.1 Description ......................................................................................................................................................... 28

5.2 Power supply ( AC to DC section)...................................................................................................................... 28

5.3 Inverter (DC to AC Section) ............................................................................................................................... 29

5.4 Electrical characteristics.................................................................................................................................... 29

5.5 Connector locations............................................................................................................................................ 30

5.6 Connector locations............................................................................................................................................ 32

6. TROUBLESHOOTING............................................................................................................................... 34

6.1 Main Procedure.................................................................................................................................................. 34

7. Power Line Transient Test (IEC 61000-4-4 Fast Transients/Burst)............................................................ 38

7.1 Peak Voltage: .....................................................................................................................................................38

7.2 Polarity : + / - ............................................................................................................................................. 38

7.3 Repetition Frequency of the impulse : 5 KHz..................................................................................................... 38

7.4 Rise-Time : 5ns ± 30% ..................................................................................................................................... 38

7.5 Impulse Duration: 50 nS ± 30%......................................................................................................................... 38

7.6 Relation to Power Supply: Asynchronous .......................................................................................................... 38

7.7 Burst Duration: 15 ms ± 20% ............................................................................................................................38

7.8 Burst Period: 300 ms ± 20% .............................................................................................................................. 38

7.9 Climatic Conditions: .......................................................................................................................................... 38

7.10 Test Procedure: ..................................................................................................................................................38

8. Power Line Surge Test (IEC 61000-4-5 Surge) ...................................................................................... 40

8.1 Climatic Condition .............................................................................................................................................40

8.2 Test Conditions:.................................................................................................................................................. 40

8.3 ............................................................................................................................................................................ 40

8.4 ............................................................................................................................................................................ 40

8.5 ............................................................................................................................................................................ 40

8.6 ............................................................................................................................................................................ 40

8.7 Display set high-resolution mode, AC input use AC 240V................................................................................. 40

9. ENVIROMENT REQUIREMENT................................................................................................................ 41

9.1 Operating............................................................................................................................................................ 41

9.2 Storage or Shipment ........................................................................................................................................... 41

10. REGULATION COMPLIANCE .................................................................................................................. 42

10.1 This product comply to the most current revisions of following regulations: ....................................................42

10.2 Electrostatics Discharge (ESD).......................................................................................................................... 43

11. QUALITY AND RELIABILITY.................................................................................................................... 44

11.1 Quality Assurance .............................................................................................................................................. 44

11.2 Reliability ........................................................................................................................................................... 44

Appendix A: PART LIST................................................................................................................................ 45

Appendix B: PCBA Assembly --------------------------------------------------------------------------------------------------53 Appendix C: DISPLAY UNIT ASSEMBLY -----------------------------------------------------------------------------------82

1. INTRODUCTION

1.1 Scope

This specification defines the requirements for the 17” MICRO-PROCESSOR based Multimode supported high resolution color LCD monitor, This monitor can be directly connected to general 15 pin D-sub VGA connector and DVI-D digital connector, eliminates the requirement of optional special display card. It also supports VESA DPMS power management and plug & play function. There is a build-in stereo audio amplifier with volume control to drive a pair of speakers.

1.2 Description

The LCD monitor is designed with the latest LCD technology to provide a performance oriented product with no radiation. This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in addition MTBF target is 20k hours or more.

Comparison Chart of AM777 (AL712)/778/677(AL716)/678(AL711)

AM778 AM777 (AL712) Panel Normal 17” panel

AU M170EN05

Hydis HT17E12-200

Normal 17” panel AU M170EN05

Hydis HT17E12-200

Signal Interface DSUB+DVI-D DSUB+DVI-D Sync Type for analog input

Color Temp user adjust DDC

Speaker No 1W+1W

Headphone Jack No Yes Microphone Jack No No USB Hub Not support Not support Tilt / Swivel Yes / No Yes / No Height Adjust Option

Separate / compatible / Separate / compatible /

Support

DDC2B DDC2B

Support

Option

AM678 (AL711) AM677 (AL716) Panel Normal 17” panel

AU M170EN05

Samsung LTM170EU-L02

Signal Interface DSUB DSUB Sync Type for analog input

Color Temp user adjust DDC

Speaker No 1W+1W

Headphone Jack No Yes Microphone Jack No No USB Hub Not support Not support Tilt / Swivel Yes / No Yes / No Height Adjust Option

Separate / compatible / Separate / compatible /

Support

DDC2B DDC2B

Normal 17” panel AU M170EN05

Samsung LTM170EU-L02

Support

Option

2. ELECTRICAL REQUIREMENTS

2.1 Standard Test Conditions

All tests shall be performed under the following conditions, unless otherwise specified.

Ambient light Viewing distance Warrn up time All specifications: 30 minutes Fully functional: 5 seconds Measuring Equipment Connected to the monitor under test. Minolta CA100 photometer, or equivalent Control settings User brightness control: Maximum (unless otherwise specified ) User contrast control: Typical (unless otherwise specified ) User red/white balance, Green/white balance and Blue/white balance control: In the center (unless otherwise specified ) Power input Ambient temperature Analog input mode

: 225 lux

: 50 cm in front of LCD panel

: Chroma 2250 signal generator or equivalent, directly

: 110Vac or 230Vac

: 20 ± 5 ˚C ( 68 ± 9 ˚ F)

: 1280 x1024 /60 Hz

2.1.1 MEASUREMENT SYSTEMS

The units of measure stated in this document are listed below:

1 gamma = 1 nano tesla 1 tesla = 10,000 gauss

cm = in x 2.54 lb = kg x 2.2

degrees F = [°C x 1.8] + 32 degrees C = [°F - 32]/1.8

u' = 4x/(-2x + 12y + 3) v' = 9y/(-2x + 12y + 3)

x = (27u'/4)/[(9u'/2) - 12v' + 9] y = (3v')/[(9u'/2) - 12v' + 9]

nits = cd/(m2) = Ft-L x 3.426 lux = foot-candle x 10.76

2.2 LCD monitor General specification

Panel Type : 17 “ active matrix color TFT LCD

1). Hydis LT17E12-200

Display size : 337.92mm(H) x 270.34mm(V)

Display mode : VGA 720 X 400 (70 Hz)

VGA 640 X 480 (60/66/70/72/75 Hz)

SVGA 800 X 600 (60/70/72/75 Hz)

XGA 1024 X 768 (60/70/75 Hz)

SXGA 1280 X 1024 (60/70/75 Hz) standard resolution

Pixel pitch : 0.098x3mm(H) x 0.294mm(V)

Display Dot : 1280 x (RGB) x 1024

Pixel Clock : 25.2 – 135.0MHz

Contrast ratio:

Brightness: 250 cd/m

Response time (Tr/Tf) : 20 /20 msec

Display color : 16777216 (8 bite color)

Viewing angle: L / R ≧ 80 / ≧ 80 ( ≧ 160 degrees horizontal typical)

U / D ≧ 65 / ≧ 65 ( ≧ 130 degrees vertical typical)

Luminance Uniformity : > 80 %

Pc interface: 1). Video : RGB analog 0.7V peak to peak

Sync : TTL positive or negative

2). Digital TMDS

Signal connector : 15 pin Mini D type, (standard VGA video)

DVI-D connector

3.5 mm stereo audio jack(Audio)(AM777/677)

3.5 mm miniature stereo Headphone jack(AM777/677)

= 0˚ 430 : 1 (typical)

(typical)

Audio power : 1Wrms + 1Wrms ( 300Hz – 10kHz (S.P.L. – 10 dB)) (AM777/677)

Front control : power on/off with LED select (up, down) adjustment (+,-)

Interface frequency

y Horizontal Frequency 24KHz --80KHz(analog), 31.5– 80KHz(digital)

y Vertical Frequency 56Hz ----75Hz

Plug & play : Support VESA DDC2B functions

Power Input voltage : Single phase, 50/60HZ, 100VAC to 240VAC ±10%

Total output power : 48 Watt max.

2.3 LCD Panel Specification

2.3.1 LCD Panel Model (Hydis LT17E12-200)

• Display Type active matrix color TFT LCD

• Resolution 1280 x 1024 pixels

• Display Dot 1280 x (RGB) x1024

• Display Area 337.92mm(H) x 270.23mm(V)

• Pixel Pitch 0.264mm(H) x 0.264mm(V)

• Display Color 16M (6bite color+FRC)

• Lamp Voltage 700Vrms (typ)

• Lamp Current 6.5mArms (typ)

• Weight 1900g (typ)

• Optical Specifications

IL = 6.5mA (RMS) Ta = 25 ± 2°C VDD = 5V FV = 60HZ F

ITEM Symbol Condition MIN. TYP. MAX. UNIT

Contrast Ratio

(Center of screen)

Rising TR Response

Time at Ta

Luminance of white

(Center of screen)

Color

Chromaticity

(CIE)

Viewing

Angle

Brightness Uniformity B

Flicker F - - 5 %

Cross talk CT - - 2.0 %

Falling T

Red

Green

Blue

White

Hori.

Vert.

CR 350 430 _

200 250 30 cd/m2

RX 0.599 0.629 0.659

0.324

GX 0.257 0.287 0.317 GY 0.568 0.598 0.628 BX 0.115 0.145 0.175

BY 0.073 0.103 0.133 WX 0.270 0.300 0.330 W

θL θR φH φ

- - 1.2

UNI

φ=0,

θ=0

Normal

Viewing

Angle

CR≥10

- 20 -

354

0.305 0.335 0.365

- 80 -

- 65 -

= 54MHZ

DCLK

(total)

msec

0.384

Degrees

2.3.2 LCD Panel Model (AU M170EN05)

• Display Type active matrix color TFT LCD

• Resolution 1280 x 1024 pixels

• Display Dot 1280 x (RGB) x 1024

• Display Area 337.92mm(H) x 270.34mm(V)

• Pixel Pitch 0.264mm(H) x 0.264mm(V)

• Display Color 262K (6 bit color)

• Lamp Voltage 700 Vrms typ.

• Lamp Current 7mA rms.( typ). 4 Lamp

• Weight 2000g .

• Optical Specifications

The following items are measured under stable conditions. The optical characteristics

should be measured in a dark room or equivalent state with the methods shown in Note(4).

Measuring equipment : TOPCON BM-5A, BM-7, PHOTO RESEARCH PR650

(Inverter Freq. : 54kHz) *Ta =25 ± 2°C, VDD=5V, fv=60 Hz, fDCLK=54 MHz, IL= 6.5mArms

Item

Contrast Ratio

(Center of screen)

Response

Time

Luminance of White

(Center of screen)

Color

Chromaticity

(CIE 1931)

Viewing

Angle

Brightness Uniformity

(9 points)

Symbol

Rising TR - 12 20

Falling T

Red

Green

Blue

White

Hor.

Ver.

F - 4.0 5

Rx 0.64

Ry 0.34

Gx 0.29

Gy 0.61

Bx 0.14

By 0.07

Wx 0.31

UNI

Condition Min. Typ. Max.

250 400 -

Normal

= 0˚

Viewing

Angle

CR≥5

75 - -

200 260 -

TYP.

-0.03

0.33

70 80 -

TYP.

+0.03

Unit

msec

cd/m2

Degrees

Note

(1)(2)(4)

BM-5A

(1)(3)

BM-7

(5)

BM-5A

(1)(4)

PR650

(1)(4)

BM-5A

(6)

BM-5A

Note 1) Definition of Viewing Angle: Viewing angle range (10≤CR)

Note 2) Definition of Contrast Ratio (CR): Ratio of gray max(Gmax),gray min(Gmin) at the

center point of panel.

Luminance with all pixels white (Gmax)

CR=  Luminance with all pixels black (Gmin)

Note 3) Definition of Response time: Sum of T

, TF

Note 4) After stabilizing and leaving the panel alone at a given temperature for 30 min, the

measurement should be executed .Measurement should be executed n a stable, windless ,and dark room.30 min after lighting the back-light. This should be measured in the center of screen. Dual lamp current :13.0mA(6.5mA x2)(Refer to the note(1) in the page 14 for more information ).

Environment condition :Ta=25±2°C

Optical characteristics measurement setup

Notes 5) Definition of Luminance of White : measure the luminance of white at center point.

Notes 6)Definition of 9 points brightness uniformity (Measuring points: Refer to the Note 5)

Bmin B

=100∗ 

UNI

Bmax

Bmax: Maximum brightness

Bmin: Minimum brightness

Notes 7) Definition of Flicker level

Flicker Voltage

F =  x 100 % LMD Voltage

♦ One maximum value of three estimated values. ♦ For this test ,an LMD(Light Measurement Device)is needed with adequate response time

to track any visible rate flicker component and with a voltage level output proportional To luminance intensity.

♦ Test Pattern: For dot inversion Driving(Gray levels of foreground dots on the test panel

Are G22,G32,and G45)

♦ Test Point :Center point of the display area

Note 8) Definition of Crosstalk (Refer to the VESA STD)

The calculation for shadowing is made from the 2 luminance measurements Gbkg and Lsh, as follows:

Lmax -Lmin C

=  x100 %

Lmin

Where Lmax is the larger value of Gbkg or Lsh , and Lmin is the smaller of the two.

♦ To determine background and foreground levels (colors),first set the background to any

gray scale or color level suitable for shadowing determination.(Note that it may take several iterations of adjusting background level and box levels to determine the proper value for the background .Next display the box levels to determine the proper value for the background level. Look for shadowing in any direction from box E. Independently vary the gray level (or color) of the background and box E until the worst case shadowing is observed. This defines the background (Gbkg) and foreground (Gfg) levels to be maintained for the remainder of the test.

♦ One point only (the target) will be measured. To determine that point proceed as follows Using the background and foreground gray levels of step1 (Gbkg and Gfg). Turn on each

box at a time. Look for the case with the worst shadowing. The box causing the worst case is the shadowing source, or Bsrc. Use Bsrc and the box opposite from it that lies directly in the shadow path. That is the target box, or Btgt. Note that box Eight be either Bsrc or Btgt, depending on the shadowing conditions, but typically Bsrc and Btgt will be a pair of opposite boxes, A&C or B&D. Btgt will only be displayed for aligning the LMD. It will be turned off for the actual measurement.

♦ The target box point (Btgt) will be measured with the source box (Bsrc) turned on then off.

(Btgt is for alignment purpose only) Display the background only at level Gbkg. Display Btgt determined in step 2 above. Using the correct distance, angle, and measurement aperture, align the LMD to the center of the Btgt. Turn off Btgt. With Gbkg set to its proper level, measure the luminance (or color). Next,turn on the source box Bsrc. Again measure at the center point of Btgt (without Btgt present.). In this case the LMD will be measuring the shadowing level, Lsh.

2.4 Input Signals

2.4.1

2.4.2

2.4.3

Video input

• Type Analog R, G, B., Digital TMDS

• Input Impedance 75 ohm +/- 2%

• Polarity Positive

• Amplitude 0 - 0.7 +/- 0.05 Vp

• Display Color same as LCD panel

Sync input

• Signal separate horizontal and vertical sync, or composite sync

which are TTL compatible

• Polarity positive and negative.

Interface frequency

The following frequency range is generalized by supported timing. If the entered

mode does not match the supported timing the display optimization will not be

assured.

• Horizontal Frequency 24KHz --80KHz(analog), 31.5– 80KHz(digital)

• Vertical Frequency 56Hz ---------75Hz

DISPLAY MODES

MONITOR

MODE NO.

1 640x350 31.5 + 70.0 - 25.0 VGA 2 640X400 24.83 - 56.4 - 21.05 NEC 3 640X400 31.5- 70.0+ 25.0 VGA 4 640X400 31.5- 70.1- 25.19 NEC 5 640X480 31.5 - 60.0 - 25.0 Defacto 6 640X480 35.0- 66.67- 30.24 MAC 7 640X480 37.86- 72.80- 31.5 VESA 8 640X480 37.5- 75.0- 31.5 VESA

9 720X400 31.5 - 70.0 + 28.0 Text Defacto 10 832X624 49.72- 74.55 - 57.28 MAC 11 800X600 35.16+ 56.25+ 36.0 SVGA 12 800X600 37.8 + 60.0 + 40.0 VESA 13 800X600 48.07 + 72.18 + 50.0 VESA 14 800X600 46.87+ 75.0+ 49.5 VESA 15 1024X768 48.4 - 60.0 - 65.0 VESA 16 1024X768 53.96 + 66.13 + 71.66 XGA 17 1024X768 56.47 - 70.07 - 75.0 VESA 18 1024X768 60.0 + 75.0 + 78.75 VESA 19 1024x768 60.24- 75.02- 80.0 MAC-768 20 1280X1024 64.0 + 60.0 + 108.5 SXGA 21 1280X1024 80.0 + 75.0 + 135.0 Defacto

SCREEN

RESOLUTION

HORIZONTAL

SYNC RATE

(kHz)

VERTICAL

SYNC RATE

(Hz)

VIDEO CLK

(MHz)

STANDARD

Supported Timing

TIMING

FV(HZ) POLARITY (DOT/LINE) (DOT/LINE) WIDTH PORCH PORCH FOREQ.(MHZ) (DOT/LINE) (DOT/LINE) (DOT/LINE)

640x350 31.469 + 800 640 96 16 48 25.175 VGA-350 70.087 – 449 350 2 37 60 640x400 24.83 – 848 640 64 64 80 21.05 NEC PC9801 56.42 – 440 400 8 7 25 640x400 31.469 – 800 640 96 16 48 25.175 VGA-GRAPH 70.087 + 449 400 2 12 35 640x400 31.5 – 800 640 64 16 80 25.197 NEC PC9821 70.15 – 449 400 2 13 34 640x480 31.469 – 800 640 96 16 48 25.175 VGA-480 59.94 – 525 480 2 10 33 640x480 35.00 – 864 640 64 64 96 30.24 APPLE MAC480 640x480 37.861 – 832 640 40 16 120 31.5 VESA-480-72Hz 72.809 – 520 480 3 1 20 640x480 37.5 – 840 640 64 16 120 31.5 VESA-480-75Hz 75 – 500 480 3 1 16 720x400 31.469 – 900 720 108 18 54 28.322 VGA-400-TEXT 70.087 + 449 400 2 12 35 832x624 49.725 – 1152 832 64 32 224 57.2832 APPLE MAC800 800x600 35.156 + 1024 800 72 24 128 36 SVGA 56.25 + 625 600 2 1 22 800x600 37.879 + 1056 800 128 40 88 40 VESA-600-60Hz 60.317 + 628 600 4 1 23 800x600 48.077 + 1040 800 120 56 64 50 VESA-600-72Hz 72.188 + 666 600 6 37 23 800x600 46.875 + 1056 800 80 16 160 49.5 VESA-600-75Hz 75 + 625 600 3 1 21 1024x768 48.363 – 1344 1024 136 24 160 65 XGA 60.004 – 806 768 6 3 29 1024x768 53.964 + 1328 1024 176 16 112 71.664 COMPAQ-XGA 66.132 + 816 768 4 8 36 1024x768 56.476 – 1328 1024 136 24 144 75 VESA-768-70Hz 70.069 – 806 768 6 3 29 1024x768 60.023 + 1312 1024 96 16 176 78.75 VESA-768-75Hz 75.029 + 800 768 3 1 28 1024x768 60.24 – 1328 1024 96 32 176 80 APPLE MAC768 1280x1024 64 + 1688 1280 112 48 248 108 VESA-102460Hz 1280x1024 80 + 1688 1280 144 16 248 135 VESA-102475Hz

If the input timing is not a supported timing listed above but within the supported frequency range (Horizontal: 80KHz,Vertical: 75Hz), this monitor will select a closest mode instead. But the display quality may not be optimized. If the input timing over the supported frequency range, a message “Input Signal Out of Range” will be shown.

FH(KHZ) SYNC TOTAL ACTIVE SYNC FRONT BACK PIXEL

66.67 – 525 480 3 3 39

74.55 – 667 624 3 1 39

75.02 – 803 768 3 3 29

60 + 1066 1024 3 1 38

75 + 1066 1024 3 1 38

2.4.4

85Hz refresh rate Support

Monitor should display 85Hz refresh rate mode as emergency mode. Monitor should display “Out of Range” warning menu at this mode.

2.4.5

Video input Connector

Analog Video input Connector: 15pins mini D-Sub

Table 2.4.5. Pin assignment for D-sub connector

PIN NO.

1 RED VIDEO 2 GREEN VIDEO 3 BLUE VIDEO 4 GROUND 5 GROUND 6 RED GROUND 7 GREEN GROUND 8 BLUE GROUND 9 PC5V (+5V DDC) 10 CABLE DETECTION 11 GROUND 12 SDA 13 H.SYNC 14 V.SYNC 15 SCL

Separate Sync

Color of plastic parts: Blue (PC99)

D-sub connector

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