AOC L1706 Service Manual

17" LCD Color Monitor HP L1706

Service

Horizontal Frequency

30- 83 kHz

TABLE OF CONTENTS

Description Page Description Page

Table Of Contents.......……..............................…........1

Revision List.…........................................……......2

1. Monitor Specification..............................………........3

2. LCD Monitor Description…………………………….......4

3. Operation Instruction…………...............……...........5

3.1. General Instructions...........................…...........5

3.2. Control Button…………….…..............……...............5

3.3 Adjusting the Picture...........................…............6

4. Input/Output Specification............……………............7

4.1. Input Signal Connector............………….................7

4.2. Factory Preset Display Modes......…..................7

4.3. Power Supply Requirements...............................8

5. Panel Specification.....………………..................9

5.1. General Feature…….....………………..................9

5.2. Optical Characteristics………………………………10

5.3 Parameter guide line for CCFL Inverter……………..11

6. Block Diagram……...................…………................12

6.1. Monitor Exploded View…………………....….......12

6.2 Software Flow Chart……………………….……….13

6.3. Electrical Block Diagram……………..….......15

7. Schematic……………......................................18

7.1 Main Board....……….......................................18

7.2 Power Board.….……....................................24

8.PCB Layout..………….......................................26

8.1. Main Board………........................................26

8.2. Power Board….......................................28

8.3. Key Board………............….......................31

9. Maintainability……….......................................32

9.1. Equipments and Tools Requirement..............32

9.2. Trouble Shooting………..............................33

10. White-Balance, Luminance adjustment...39

11. BOM List….....................................................40

12. Different Parts List.........…….……........................53

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.

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

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17" LCD Color Monitor HP L1706

Revision List

Version Date Revision History TPV Model Name

T76SM4DTAKHPNE

T76SM4DTAKHANE T76SM4DDAKHANE T76SM4DBAKHPNE

A00 Apr.-04-2007 first release

A01 May.-21-2007 Add TPVDW Model in Item 12 T784KC4DKHHANPE

T76SM4DBAKHANE

T76SM4DLAKHPNE T76SM4DDAKHPNE T76SM4DPAKHPNE T76CM4DPAKHPNE

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17" LCD Color Monitor HP L1706

1. Monitor Specification

Driving system TFT Color LCD Panel LTM170EU-L11 Size 43.2cm(17.0") Pixel pitch 0.264mm( H )x 0.264mm( V )

LCD Panel

Input

Display Colors Over 16 million Colors Dot Clock 140MHz Max. Resolution 1280 x 1024 Plug & Play VESA DDC2BTM

Viewable angle 140˚ (H) 130˚ (V) Response time (typ.) 16 ms Brightness 250 Contrast 400:1 Video Analog /Digital Sync. Type H/V TTL H-Frequency 30kHz – 83kHz V-Frequency 50-76Hz

ON Mode <37W

Power Consumption

Maximum Screen Size

Power Source 100~240VAC,47~63Hz

Environmental Conditions

Main Dimensions

Weight (N. W.)

OFF Mode <1W Sleep Mode <2W Horizontal : (337.92mm) Vertical : (270.336mm)

Operating Temp: 5°C to 35°C Storage Temp.: -20°C to 60°C Operating Humidity : 20% to 80%

Unpackaged(W*H*D) 422mm*449mm*215mm Packaged(W*H*D) 570mm*535mm*230mm

Packaged 6.5Kg/Unit Unpackaged 4.5Kg/Unit

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17" LCD Color Monitor HP L1706

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2. LCD Monitor Description

The LCD Monitor will contain main board, power board, key board and an audio 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.

Power Board

Include adapter and inverter)

AC-IN 110V-240

Monitor Block Diagram

CCFT Drive.

Main Board

Audio board

Key board

Flat Panel and CCFL backlight

RS232 Connector For white balance adjustment in factory mode

Video signal, DDC

HOST Computer

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17" LCD Color Monitor HP L1706

3. Operation Instructions

3.1 General Instructions

Press the power button to turn the monitor on or off. The other control buttons are located at front of the panel. By changing these settings, the picture can be adjusted to your personal performance.

The power cord should be connected and insert to adaptor.

-

Connect the video cable from the monitor to the computer VGA card.

-

- Press the power button to turn on the monitor, the power indicator will light up to Green.

3.2 Control Buttons

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17" LCD Color Monitor HP L1706

3.3 Adjust the Picture

1.

2.

3.

4.

5.

6.

Brightness

Contrast Adjust the contrast

Image Control

Color

Language Shows the language of the OSD window.

Management

Adjust the brightness.

Adjust the:

z Auto Adjustment: Adjusts the main settings a nd produces a stable, centered image. z H-Position: horizontal position of the screen image. z V-Position: vertical position of the screen image. z Clock: frequency of the pixel clock to minimize vertical bar. z Phase: phase value to minimize horizontal jitters.

z 9300K: recall 9300K color z 6500K: recall 6500K color z SRGB: recall SRGB color z Custom Color: adjusts the color tint of white, and the red, green, and blue (RGB) mix

for colors.

z Power Saver: enable/disable power saving z Power On Recall: enable/disable power recall z Mode Display: enable/disable mode display z Sleep Timer: set sleep timer z Basic Menu: set to basic menu

7.

8.

9.

10.

OSD Control

Information Current setting, recommended setting, serial number, total hours, backlight hours, Exit. Factory

Reset Exit Exit the current OSD window.

OSD (on Screen Display) settings: adjusts the H/V position, timeout, On Screen Display window.

Resets the display to original factory settings for color, brightness, phase, and cl ock.

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17" LCD Color Monitor HP L1706

4. Input/Output Specification

4.1 Input Signal Connector

Pin Signal Pin Signal

1 Red Video 9 +5 V (from PC) 2 Green Video 10 Ground 3 Blue Video 11 Ground 4 Ground 12 DDC-serial Data 5 Detect Cable 13 Horizontal Sync 6 Red GND 14 Vertical Sync 7 Green GND 15 DDC-serial Clock 8 Blue GND

PIN 1

PIN 11

4.2 Factory Preset Display Modes

Pixel

Preset

1 640 x 480 31.469 - 59.940 - 25.175 VGA 2 640 x 480 37.861 - 72.809 - 31.500 VESA 3 640 x 480 37.500 - 75.000 - 31.500 VESA 4 720 x 400 31.469 - 70.087 + 28.322 VGA 5 800 x 600 37.879 + 60.317 + 40.000 VESA 6 800 x 600 48.077 + 72.188 + 50.000 VESA

Format

Horz Freq (KHz)

VGA connector layout

Horz Polarity

Vert Freq (Hz)

PIN 5

Vert Polarity

Pixel Clk (MHz) Source

7 800 x 600 46.875 + 75.000 + 49.500 VESA 8 832 x 624 49.726 ± 74.551 ± 57.284 MAC

9 1024 x 768 48.363 - 60.004 - 65.000 VESA 10 1024 x 768 56.476 - 70.069 - 75.000 VESA 11 1024 x 768 60.023 + 75.029 + 78.750 VESA 12 1152 x 870 68.68 - 75.06 - 100.000 Mac 13 1152 x 900 71.71 - 76.05 - 105.561 Sun 14 1280 x 1024 63.98 + 60.02 + 108.000 VESA 15 1280 x 1024 79.97 + 75.02 + 135.000 VESA

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17" LCD Color Monitor HP L1706

4.3 Power Supply Requirements

Parameter Range

AC Line Voltage range 100 to 240V

AC Line Frequency range 47 to 63 Hz

Peak surge Current < 55 A MAX AT 220VAC and cold starting

Leakage Current < 3.5 mA

Power Consumption

≤37W

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17" LCD Color Monitor HP L1706

5. Panel Specification

5.1 General Feature

ABSOLUTE MAXIMUM RATINGS

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17" LCD Color Monitor HP L1706

5.2 Optical Characteristics

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17" LCD Color Monitor HP L1706

5.3 Parameter guide line for CCFL Inverter

TFT LCD Module:

Back Light Unit:

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17" LCD Color Monitor HP L1706

6. Block Diagram

6.1 Monitor Exploded View

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17" LCD Color Monitor HP L1706

6.2 Software Flow Chart

1

Y

2

N

3

4

5

N

Y

6

N

7

8

Y

9

10

N

11

12

Y

13

N

Y

14

15

Y

N

16

Y

17

18

N

19

Y

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17" LCD Color Monitor HP L1706

REMARK:

1) MCU initialize.

2) Is the EEprom blank?

3) Program the EEprom by default values.

4) Get the PWM value of brightness from EEprom.

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 EEprom. Turn on the LED and set it to green color. Scalar initialize.

10) In standby mode?

11) Update the lifetime of back light.

12) Check the analog port, are they’re any signals coming?

13) Does the scalar send out an interrupt request?

14) Wake up the scalar.

15) Are there any signals coming from analog port?

16) Display "No connection Check Signal Cable" message. And go into standby mode after the message

disappear.

17) Program the scalar to be able to show the coming mode.

18) Process the OSD display.

19) Read the keyboard. Is the power key pressed?

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17" LCD Color Monitor HP L1706

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6.3 Electrical Block Diagram

6.3.1 Scalar Board

Control Interface

(KEYPAD)

OSD

MCU U601)

EPR_SDA EPR SCL

EEPROM

(U602)

Panel Interface

(CN503)

Scalar TSU16AK

(Include ADC, OSD)

(U401)

RXD TXD

D-Sub Connector

R G B

(CN301)

Hsync,

nc

DB15_SDA DB15 SCL

DDC_SDA DDC SCL

EEPROM

(U301)

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17" LCD Color Monitor HP L1706

6.3.2 Inverter / Power Board

Inverter Block Diagram

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17" LCD Color Monitor HP L1706

Power Block Diagram

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