AOC VS17X Service Manual

17" LCD Color Monitor HP VS17X

Service

Service

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…………...............……...........4

3.1. General Instructions...........................…...........4

3.2. Control Button…………….…..............……...............4

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...............................8

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

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

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

6. Block Diagram……...................…………................11

6.1. Monitor Exploded View…………………....….......11

6.2 Software Flow Chart………………………….……….12

6.3. Electrical Block Diagram……………..….......14

7. Schematic……………......................................16

7.1 Main Board....……….......................................16

7.2 Power Board.….……....................................23

8.PCB Layout..………….......................................25

8.1. Main Board………................................................25

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

8.3. Key Board………............….......................30

9. Maintainability………...............................................31

9.1. Equipments and Tools Requirement.....................31

9.2. Trouble Shooting………...................................32

9.2.1 Main Board…………........................................32

9.2.2 Power Board………………….............................34

9.2.3 Key Board……………………..............................36

10 White-Balance, Luminance adjustment...37

11. Check List.……………………………..…………….39

12. BOM List……………………..………………………44

13. Different Parts List….............................................59

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

1

17" LCD Color Monitor HP VS17X

Revision List

Version Date Revision History TPV Model Name

A00 Sep.-14-06 Initial release

T76CM4DKAJHPAE

T76CM4DKAJHAAS

2

17" LCD Color Monitor HP VS17X

1. Monitor Specification

Items Description

Driving system TFT Color LCD

Panel CLAA170EA 07

Display area 337.920(H) x270.336 (V) (17.0")

Pixel pitch 0.264mm(H) x 0.264mm(V)

LCD Panel

Viewable angle 140˚ (H) 130˚ (V)

Response time (typ.) 12ms

Brightness 300cd/m²

Contrast 500:1

Terminals VGA 15-Pin D-type connector

Video Analog

Input

Display Colors 16.2 million Colors

Max. Resolution 1280 x 1024 (75Hz)

Plug & Play VESA DDC2BTM

Power Consumption

Power Source 100~240VAC,50~60Hz

Relative Humidity 20% to 80%

Environmental

Considerations

Sync. Type H/V TTL

H-Frequency 30kHz – 83kHz

V-Frequency 50-76Hz

ON Mode

Sleep Mode

OFF Mode

Operating Temp: 5°C to 35°C

Storage Temp.: -20°C to 60°C

Operating Humidity : 20% to 80%

37W

≤

2W

≤

1W

≤

3

17" LCD Color Monitor HP VS17X

(

2. LCD Monitor Description

The LCD Monitor will contain main board, power board, a key 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 board)

AC-IN

110V-240V

Monitor Block Diagram

CCFT Drive.

Main Board

Keyboard

Flat Panel and

CCFL backlight

RS232 Connector

For white balance

adjustment in

factory mode

Video signal, DDC

HOST Computer

4

17" LCD Color Monitor HP VS17X

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

- Power Button:

When pressed, the monitor enters the off mode, and the LED turns blank. Press again to restore normal status.

- Left / Right Button:

When the OSD show on screen, Left/Right Button are used to control the monitor functions. Press to switch
functions or adjust settings. And if the OSD off, Left buttons is used to automatically set the H Position, V Position,
Clock and Phase.

- Power Indicator:

Green — Power On mode.
Orange — Power Saving mode.
Blank — Power Off Mode.

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17" LCD Color Monitor HP VS17X

6

17" LCD Color Monitor HP VS17X

3.3 Adjust the Picture

NO. Control Icons NO. Control Icons

1 Brightness

2 Contrast

3 Auto Adjustment

4 Image Control

5 Color

6 Custom Color

7 Language

8 Management

9 OSD Control

10 Information 25 Vertical OSD Position

11 Factory Reset

12 Default Video Input

13 Horizontal Position

14 Vertical Position

15 Clock

16 Clock Phase

17 Power Saver

18 Mode Display

19 Power-On Status Display

20 Sleep Timer

21 Basic Menu

22 Advanced Menu

23 Power On Recall

24 Horizontal OSD Position

26 OSD Timeout

27 OSD Transparency

28 Volume

29 Exit

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17" LCD Color Monitor HP VS17X

4. Input/Output Specification

4.1 Input Signal Connector

Pin Mnemonic Signal Pin Mnemonic Signal

1 RV Red Video 9 +3.3/+5 V 3.3/+5 V (from PC)

2 GV Green Video 10 SG Sync Ground

3 BV Blue Video 11 NC None

4 NC None 12 SDA DDC Data

5 GND Ground (DDC Return) 13 HS Horizontal Sync

6 RG Red GND 14 VS Vertical Sync

7 GG Green GND 15 SCL DDC Clock

8 BG Blue GND

VGA connector layout

PIN 1

PIN 11

PIN 5

8

17" LCD Color Monitor HP VS17X

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

6 800 x 600 48.077 + 72.188 + 50.000 VESA

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

Format

Horz Freq

(KHz)

Horz

Polarity

+

Vert Freq

(Hz)

60.317 + 40.000 VESA

Vert

Polarity

Pixel Clk

(MHz) Source

15 1280 x 1024 79.97 + 75.02 + 135.000 VESA

4.3 Power Supply Requirements

Parameter Range

AC Input Voltage 90 to 265V

AC Input Frequency 47 to 63 Hz

Inrush Current 50A MAX AT 220VAC and 30A AT 120VAC

Leakage Current 5 mA MAX at 120VAC

Power Consumption

≤37W

9

17" LCD Color Monitor HP VS17X

5. Panel Specification

5.1 General Feature

absolute maximum ratings

10

17" LCD Color Monitor HP VS17X

5.2 Optical Characteristics

Ta=25℃，VCC=5.0V

11

17" LCD Color Monitor HP VS17X

6. Block Diagram

6.1 Monitor Exploded View

.

12

17" LCD Color Monitor HP VS17X

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

N

Y

14

15

Y

N

16

Y

17

18

N

19

Y

13

17" LCD Color Monitor HP VS17X

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 VS17X

6.3 Electrical Block Diagram

6.3.1 Scalar Board

W78E65P-40

44PIN-PLCC

OSD Control

Interface (Keypad)

LCD Interface

Scalar MST8116B

(Include: ADC, OSD，MCU etc)

D-SUB

Connector

EEPROM

24C02

EEPROM

AT24C16

Crystal

14.318MHZ

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17" LCD Color Monitor HP VS17X

6.3.2 Inverter / Power Board

AC input

EMI filter

Bridge

Rectifier

and Filter

StartCircuit

PWM

Control IC

Transformer

Over

Voltage

Protect

Rectifier

diodes

CN902

12V

Feedback

Circuit

5V

Lamp

LC

Resonance

Transformer

MOSFET

Feedback

Circuit

Over

Voltage

PWM

Control IC

ON/OFF

Control

DIM

ON/OFF

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17" LCD Color Monitor HP VS17X

7. Schematic

7.1 Main Board

SCHEMATIC

B2

VCPU

VAA4
5V

VAA3

VAA2

VCC3.3
VCC1.8
VAA1

5V

VCC5V

VCPU

VCC5V

B1

TXD

RXD

DDC_DAT

ST_DET1 HSYNC

DDC_WP

3.INPUT

B3

DDC_WP
ST_DET1

DDC_CLK
DDC_DAT
RXD

TXD

VCPU
onPANEL_5V/3.3V

onBACKLITE
onPANEL_12V

6.MCU

B6

VCC5V

5V

AUDIO_SD

7.AUDIO

B4

onPanel_12V

onBACKLITE

onPanel_5V/3.3V
VCPU
VCC5V

VCC3.3

AdjBACKLITE

VCC1.8
VAA1

VAA2

VAA3

VAA4

5V

2.POWER

RIN

GNDR

GIN

GNDG

SOGDDC_CLK

GNDB

VSYNC

CSZ
SCL
SDA

HWRESET

INT

AD0
AD1

AD2

AD3

AUDIO_SD

ROUT+1

LOUT+1

OUT-L-

OUT-L+

OUT-R+

OUT-R-

OUT-R­OUT-R+
OUT-L+

OUT-L-

LOUT+1

ROUT+1

VOLUME

GND

GND

VLCD_12V

VLCD

RIN

GNDR
GIN
GNDG
SOG

BIN

VLCD_12V

VLCD

BIN
GNDB

HSYNC

VSYNC

CSZ

SCL
SDA
HWRESET

INT

AD0
AD1
AD2

AD3

VOLUME

AdjBACKLITE

VCC1.8

VCC3.3

PA[0..9]

PB[0..9]

GA[0..3]

BA[0..5]

GPO[0..4]

VCC1.8

VAA1

VAA2

VAA3

VAA4

ESP

OSP

4.SCALER

VAA1

VCC3.3

PA[0..9]

PB[0..9]

GA[0..3]

BA[0..5]

ESP

OSP

GPO[0..4]

Title

Size Document Number Rev

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Date: Sheet

VAA3

PA[0..9]

PB[0..9]

GA[0..3]

BA[0..5]

ESP

OSP

GPO[0..4]

VAA4

VLCD

VLCD

VLCD_12V

VAA2

B5

5.PANEL INTERFACE

TOP

VLCD_12V

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17" LCD Color Monitor HP VS17X

AdjBACKLITE4

onPanel_5V/3.3V6

GND 3,4,5,6,7

Brightness

GND

1

GND

3

VCC12V

5

5V

7

VCC5V

9

GND

11

R205 4.7K 1/16W

1

R207 4.7K 1/16W

C207

0.1uF

CN201

CONN

VCC5V

32

1

2
4
6
8
10
12

R203
1K 1/16W

Q202

PMBS3904

VCC5V

R208

10K 1/16W

32

Q204

PMBS3904

ON_OFF
DIM
VCC12V
5V
VCC5V
GND

R204

10K 1/16W

220uF/25V

10K 1/16W

R

C206

1uF

C202

VCC12V

C230

NC 0.47uF

VCC5V

R202

10K 1/16W

R201 4.7K 1/16W

D201 DIODE SCHOTTKY

C203

+

0.1uF

VLCD

Q203
AO3401

C

+

C208

0.1uF

10uF/16V

FB201
NC

C204

+

220uF/25V

C205

0.1uF

VLCD 5

VCC5V

VCC5V+
VCC5V

VCC5V 3,4,7

VCPU

VCPU 6

5V

5V 7

+

VCC3.3

R209

NC

R211

10K 1/16W

C219

220uF/25V

R210

0 1/16W

C201

0.1uF

C220

0.1uF

32

R212 4.7K 1/16W

1

Q201
PMBS3904

5V

VS19

onBACKLITE 6

VCC5V

VS17

VCC5V+

C213

47uF/16V

+

C209

47uF/16V

C214

0.1uF

VCC5V+

+

D202

DIODE

C210

0.1uF

TO-263

U202

3

1

AIC1084-33M

VIN

ADJ

TO-252

U201

AZ1117D-1.8

3 2

VI VO

2

VOUT

GND

1

C215

47uF/16V

U201 change to 1.8V

+

C211

47uF/16V

VCC3.3

+

C216

0.1uF

VCC1.8

VAA1

VAA2

VAA3

VAA4

C212

0.1uF

FB202
600 OHM

VCC1.8 4

VCC3.3 4,7

VCPU 6

VAA1 4,7

VAA2 4,7

VAA3 4,7

VAA4 4,7

VCC12V

R215

10K 1/16W

C217

0.1uF

32

Q205

1

PMBS3904

R214 4.7K 1/16W

onPanel_12V6

VLCD_12V

VLCD_12V 5

Q206
AO3407

+

10uF/16V

C218

VCC12V

R216

4.7K 1/16W

H1

678

9

123

123

5

678

5

4

4

H8D3.5-2LX

9

H2

678

9

123

123

5

678

5

4

4

H8D3.5-2LX

9

H3

678

9

123

123

5

678

5

4

4

H8D3.5-2LX

9

H4

678

9

123

123

5

678

5

4

4

H8D3.5-2LX

Title

Size Document Number Rev

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Date: Sheet

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