AOC HP-L1706 Schematic

17" LCD Color Monitor

HP L1706

Service

Service

Service

		Horizontal Frequency
		3083 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......…..................8

4.3.Power Supply Requirements...............................9

5.Panel Specification.....………………..................10

5.1.General Feature…….....………………..................10

5.2.Optical Characteristics………………………………11 5.3 Parameter guide line for CCFL Inverter……………..13

6.Block Diagram……...................…………................15

6.1. Monitor Exploded View…………………....….......15

6.2 Software Flow Chart……………………….……….16

6.3. Electrical Block Diagram……………..….......18

7. Schematic……………......................................20

7.1Main Board....……….......................................20

7.2Power 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.........…….……........................52

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
	A00	Apr.-04-2007	first release	T76CM9DKAKHPNE
	A01	May.-08-2007	Add TPVDW Model in Item 12	T76GM9DKAKHPNE
				T76GM9DPAKHPNE
	A02	Jun.-07-2007	Add TPVDW Model in Item 12	T76SM9DKAKHPNE
	A03	Jun.-19-2007	Add TPVDW Model in Item 12	T76CM9DPAKHPNE
	A04	Sep.-26-2007	Add TPVDW Model in Item 12	T76GM9DBAKHFNNE
	A05	Oct.-10-2007	Add TPVDW Model in Item 12	T76SM9DBAKHFNNE
	A06	Oct.-16-2007	Add TPVDW Model in Item 12	T76SM9DAAKHANNE
	A07	Oct.-18-2007	Add TPVDW Model in Item 12	T76CM9DBAKHFNNE
	A08	Nov.-01-2007	Add TPVDW Model in Item 12	T76GM9DNAKHANNE
	A09	Nov.-09-2007	Add TPVDW Model in Item 12	T76SM9DKAKHPN1E
				T76SM9DPAKHPNE
	A10	Dec.-09-2007	Add Second Panel in Item 5	LTM170EUL31-8TM

2

17" LCD Color Monitor

HP L1706

1. Monitor Specification

3

17" LCD Color Monitor

HP L1706

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.

Monitor Block Diagram

	CCFT Drive.	Flat Panel and
		CCFL backlight

Power Board				Main Board
										RS232 Connector
(Include adapter and inverter)
										For white balance
										adjustment in
										factory mode
		Audio board			Key board
AC-IN										Video signal, DDC
						HOST Computer
110V-240

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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.

3.2Control Buttons

5

17" LCD Color Monitor

HP L1706

3.3 Adjust the Picture

Use the On-Screen Display (OSD) to adjust the screen image based on your viewing preferences. To access the OSD, do the following:

1.If the monitor is not already on, press the Power switch to turn on the monitor.

2.To access the OSD Menu, press the Menu button on the monitor’s front panel.

3.To navigate through the OSD Menu, press the + (Plus) button on the monitor’s front panel to scroll up, or the – (Minus) button to scroll in reverse.

4.To select an item from the OSD Menu, use the + or – buttons to scroll to and highlight your selection, then press the Menu button to select that function.

5.Adjust the item using the + or – buttons on the front panel to adjust the scale.

6.After adjusting the function, select Save and Return, or Cancel if you don’t want to save the setting, then select Exit from the Main Menu.

If the buttons remain untouched for 10 seconds while displaying a menu, new adjustments will be discarded and the settings will revert to previous settings and exit the menu.

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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

VGA connector layout

PIN 1	PIN 5
PIN 11

7

17" LCD Color Monitor

HP L1706

4.2 Factory Preset Display Modes

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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

CLAA170EA07P

LTM170EUL31-8TM

10

17" LCD Color Monitor

HP L1706

5.2 Optical Characteristics

CLAA170EA07P

11

17" LCD Color Monitor

HP L1706

LTM170EUL31-8TM

12

17" LCD Color Monitor

HP L1706

5.3 Parameter guide line for CCFL Inverter

TFT LCD Module:

CLAA170EA07P

LTM170EUL31-8TM

13

17" LCD Color Monitor

HP L1706

Back Light Unit:

CLAA170EA07P

LTM170EUL31-8TM

14

17" LCD Color Monitor

HP L1706

6.2 Software Flow Chart

1

Y

2 3

N

4

5	N
Y
6

N

7 8

Y

9

	10	N	11
	Y
N	12		13	N
	Y		Y
	14		15	N
				16
			Y
			17

18 N 19

Y

16

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

6.3Electrical Block Diagram

6.3.1Scalar Board

			Panel Interface
			(CN101)
	EPR_SDA
EEPROM
	EPR SCL
			Scalar TSUM16AL
(U402)
		(Include ADC OSD MCU)
			(U401)

	RXD	R	Hsync,		DDC_SDA
		G			DDC SCL
	TXD
		B	Vsync
	D-Sub Connector				EEPROM
	(CN405)				(U404)

DB15_SDA

DB15 SCL

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17" LCD Color Monitor

HP L1706

6.3.2 Inverter / Power Board

AC inlet

filter

Rectifier and

Transform

Rectifier and

12V/5V

filter

filter D20;

D921

To main board

Start circuit R905; R909, R910

OVP circuit

Switching circuit

Feedback

PWM control

circuit 12V

IC&MOSFET

IC902;IC921

On/off control		Start circuit

	PWM control IC			Push-pull			LC resonant		Lamp
				circuit
Dimming control
						Feedback circuit

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17" LCD Color Monitor

7. Schematic

7.1 Main Board

11/21 CN405 #11 change to NC

CN405

17			RED+				FB410	150 OHM
11	1	RED+
	6	RED-	GREEN+				FB411	150 OHM
12	2	GREEN+
	7	GREEN-	BLUE+				FB412	150 OHM
13	3	BLUE+							751/10W		751/10W
14	8	BLUE- PC5V						R438		R439
	10
	4	PC5V
	9
15	5
			RED-
16	DB15		GREEN-
			BLUE-
		3	D403	3	D404	3	D405
			BAV99		BAV99		BAV99
		D406						ESD_5V
		MLL5232B 5.6V

C4392

0.1uF1

C4402

0.1uF1

C4412

0.1uF1

	VGA_CON
HSI	FB409	150 OHM		R446	1K 1/10W
VSI						R447
D408	D409	R448	C442	R449		C443
MLL5232B 5.6V	MLL5232B 5.6V	2.2K 1/10W	33pF	2.2K 1/10W		220pF

D411	D412
MLL5232B 5.6V	MLL5232B 5.6V

HP L1706

R434

56 1/10W

C432

0.047uF

RIN

2

R435

56 1/10W

C433

0.047uF

GIN

2

R436

56 1/10W

C434

0.047uF

BIN

2

+5V

R440

R437

470 1/10W

C435

0.001uF

1/10W75

SOG

2

R470

R441

100 1/10W

C436

0.047uF

GNDR 2

1K 1/10W

R442

100 1/10W

C437

0.047uF

GNDG 2

ESD_5V

R443

100 1/10W

C438

0.047uF

GNDB 2

D425

+5V

MLL5232B 5.6V

+5V

2,3

R444

10K 1/10W

R445

100 1/10W

11/27 D407 change to BAV70(93G-64-42-P)

DET_VGA 2

+5VA

PC5V

HSYNC 2

1

2

1K 1/10W

VSYNC 2

D407

BAV70

D410

3

MLL5232B 5.6V

R450

R451

C444

U404

10K 1/10W

10K 1/10W

R452

8

VCC

A0

1

0.1uF

10K 1/10W

7

2

SCL_VGA

WP

A1

R453

47 1/10W

6

3

SCL

A2

SDA_VGA

R454

47 1/10W

5

4

SDA VSS

24LC02B/SNG

2 DDCA_SDA

2 DDCA_SCL

DDC_WP 2

Title	715G2433-A(L1706 down size)
Size	Document Number			Rev
B	INPUT			D
Date:	Thursday , December 07, 2006	Sheet 1 of	4

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