AOC 197p Schematic

19" LCD Color Monitor AOC 197P+

Service

Horizontal Frequency

30-83 kHz

TABLE OF CONTENTS

Description Page Description Page

Table Of Content s.. .....……. ................……...........…........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…………………………8

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

5.1 Display Characteristics………………………………9

5.2 Optical Characteristics………………………………..9

5.3 Parameter guide line for CCFL Inverter……………..10

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

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

6.1 Software Flow Chat…….…..........………….........11

6.2 Electrical Block Diagram………...………...…......12

7. Schematic……………………………………………. 15

7.1 Main Board…………..............................................15

7.2 Power Board....……………....................................20

8. PCB Layout..………….......................................22

8.1 Main Board……………......................................22

8.2 Power Board…......................................................25

8.3 Key Board……………….....................................28

8.4 Audio Board………………………………………….28

9. Maintainability……….......................................29

9.1. Equipments and Tools Requirement.....................29

9.2. Trouble Shooting………….................................... 30

10. White-Balance, Luminance adjustment.................35

11.Monitor Exploded View……..……………............36

12. BOM List....……....................................................37

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19" LCD Color Monitor AOC 197P+

Revision List

Revision Date Revision History TPV Model

A00 Apr.-23-2007 Initial release T97HM8HLF1MGAE

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19" LCD Color Monitor AOC 197P+

1. Monitor Specifications

Model number 197P+ Driving system TFT Color LCD Size 48cm(19.0" )

LCD Panel

Resolution

Pixel pitch 0.294mm(H) x 0.294m m (V) Video R, G, B Analog interface & Digital Interface Separate Sync. H/V TTL & TMDS Display Color 16.2million Colors Dot Clock 135MHz Horizontal scan range 30 kHz - 83 kHz Horizontal scan Size(Maximum) 376.32mm Vertic al sc an rang e 55 Hz - 75 Hz Vertical scan Size(Maximum) 301.056mm Optimal preset resolution 1280 x 1024 (60 Hz) Highest preset resolution 1280 x 1024 (75 Hz) Highest addressable resolution 1280 x 1024 (75 Hz) Plug & Play Input Connector D-Sub 15pin & DVI-D

Input Video Signal Power Source 100~240VAC, 47~63Hz Connector Type 15-pin Mini D-Sub & DVI-D

VESA DDC2B

Analog: 0.7Vp-p(standard), 75 OHM, Positive & DVI-D Digital Interface (TMDS)

Physical

Characteristics

Environmental

Regulations

Signal Cable Type Detachable Dimensions & Weight: Height (with base) 415(mm) Width 413(mm) Depth 256(mm) Weight (monitor only) 6.0(Kg) Weight (with packaging) 7.5(Kg) Temperature: Operating Non-Operating Humidity: Operating 10% to 85% (non-condensing) Non-Operating 5% to 80% (non-condensing) Altitude: Operating 0~3000m (0~10000 ft) Non-Operating 0~5000m (0~15000 ft) CCC,cULus,FCC,CE,MPRII,RoHS

0°C- +50°C

-20°C- 60°C

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19" LCD Color Monitor AOC 197P+

2. LCD Monitor Description

The LCD MONITOR will contain a main board, a power board, an audio board and 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.

PWPC board (Include: adapter, inverter)

AC-IN 100V-240V

Monitor Block

CCFL Drive.

Main Board

Keyboard

Flat Panel and CCFL backlight

RS232 Connector For white balance adjustment in factory mode

Video signal DDC

HOST Computer

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19" LCD Color Monitor AOC 197P+

3. Operating Instructions

3.1 General Instructions

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

The power cord should be connected.

-

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

-

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

-

3.2 Control Buttons

1 Power Button & Indicator 4 - / Brightness 2 Menu / Enter 5 Auto config / Exit 3 + / Contrast

/Power Button & Indicator:

Press this button to turn the monitor ON or OFF, And display the monitor’s state.

- Power Indicator:

- Green — Full Power Mode

- Orange — Active-off Mode

- MENU / ENTER : Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD menu when in Volume Adjust OSD status.

- +/ Contrast:

Activates the volume control when the OSD is OFF or navigate through adjustment icons when OSD is ON or adjust a function when function is activated.

- - / Brightness:

Activates the volume control when the OSD is OFF or navigate through adjustment icons when OSD is ON or adjust a function when function is activated.

- Auto config / Exit:

1. When OSD menu is in active status, this button will act as EXIT-KEY (EXIT OSD menu).

2. When OSD menu is in off status, press this button for 2 seconds to activate the Auto Adjustment function.

The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.

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19" LCD Color Monitor AOC 197P+

3.3 Adjusting the Picture

· Press the MENU-button to activate the OSD window.

· Press+ or - to navigate through the functions. Once the desired function is highlighted, press the MENU-button

to activate it. If the function selected has a sub-menu, · press or again to navigate through the sub-menu functions. Once the desired function is highlighted, press MENU-button to activate it.

· Press+ or - to change the settings of the selected function. To exit and save, select the exit function. If you want

to adjust any other function, repeat steps 2-3.

· OSD Lock Function: To lock the OSD, press and hold the MENU button while the monitor is off and then press

power button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while the monitor is off and then press power button to turn the monitor on.

Main Menu

Item

Luminance

Image Setup

Image Position

Color Temp.

Auto Adjustment

OSD Setup

Main Menu

Icon

Sub Menu

Item

Contrast Brightness

Focus Clock H. Position V. Position

Warm N/A Recall Warm Color Temperature from EEPROM. Cool N/A Recall Cool Color Temperature from EEPROM. sRGB N/A Recall sRGB Temperature from EEPROM.

User / Red User / Green User / Blue

Yes N/A Auto adjusting H/V position, focus, phase. No N/A Back to main OSD.

H. Position V. Position

OSD Timeout

Sub Menu

Icon

Description

Contrast from Digital-register. Backlight Adjustment

Adjust Picture Phase to reduce Horizontal-Line noise Adjust picture Clock to reduce Vertical-Line noise. Adjust the horizontal position of the picture. Adjust the vertical position of the picture.

Red Gain from Digital-register. Green Gain Digital-register. Blue Gain from Digital-register.

Adjust the horizontal position of the OSD. Adjust the vertical position of the OSD.

Adjust the OSD timeout.

Language

Information

Reset

Exit

Language N/A Set OSD language.

Information N/A Yes N/A Clear each old status of Auto-configuration .

No N/A Do not execute reset, return to main menu. N/A N/A Exit OSD

Show the resolution, H/V frequency and input port of current input timing.

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19" LCD Color Monitor AOC 197P+

4. Input/Output Specification

4.1 Input Signal Connector

4.1.1 D-SUB connector

PIN NO. DESCRIPTION PI N NO. DESCRIPTION

1 Video-Red 9 +5V 2 Video-Green 10 Detect Cable 3 Video-Blue 11 Ground 4 GND 12 DDC-Serial data 5 DDC-Return 13 H-sync 6 GND-R 14 V-sync 7 GND-G 15 DDC-Serial clock 8 GND-B

VGA connector layout

15 6

11 15

10

4.1.2 DVI-D connector

Pin No.

1 TMDS Data 2- 13 TMDS Data 3+ 2 TMDS Data 2+ 14 +5V Power 3 TMDS Data 2/4 Shield 15 Ground(for+5V) 4 TMDS Data 4- 16 Hot Plug Detect 5 TMDS Data 4+ 17 TMDS Data 06 DDC Clock 18 TMDS Data 0+ 7 DDC Data 19 TMDS Data 0/5 Shield 8 N.C. 20 TMDS Data 5-

9 TMDS Data 1- 21 TMDS Data 5+ 10 TMDS Data 1+ 22 TMDS Clock Shield 11 TMDS Data 1/3 Shield 23 TMDS Clock + 12 TMDS Data 3- 24 TMDS Clock -

Signal Name

24 - Pin Color Display Signal Cable

Pin No.

Signal Name

7

19" LCD Color Monitor AOC 197P+

4.2 Factory Preset Display Modes

Standard

Dos-mode 720 x 400

VGA 640 x 480

VGA 640 x 480 37.5 75 SVGA 800 x 600 37.879 60 SVGA 800 x 600 46.875 75

XGA 1024 x 768 48.363 60

XGA 1024 x 768 56.476 70

XGA 1024 x 768 60.02 75

XGA 1024 x 768 48.78 60

XGA 1024 x 768 60.241 75 SXGA 1280 x 1024 64 60 SXGA 1280 x 1024 80 75

Resolution

4.3 Power Supply Requirements

A/C Line voltage range 100 V ~ 240 V

A/C Line frequency range Current 1.5A max at 100V; 0.8A max at 240 V Peak surge current < 55A peak at 240 VAC and cold starting Leakage current < 3.5mA

Power line surge DC output Volt age

CURRENT

50 ± 3Hz, 60 ± 3Hz

No advance effects (no loss of information or defect) with a maximum of 1 half-wave missing per second 5VDC ± 5％; 12VDC± 5％

1.5Amp (5V) ；2 Amp (12V)

Horizontal Vertical

Frequency (kHz) Frequency (Hz)

31.47 70

31.47 60

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19" LCD Color Monitor AOC 197P+

5 Panel Specification

5.1 Display Characteristics

5.2 Optical Characteristics

9

19" LCD Color Monitor AOC 197P+

5.3 Parameter guide line for CCFL Inverter

1.TFT LCD Module:

2.Back Light Unit:

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19" LCD Color Monitor AOC 197P+

6. Block Diagram

6.1 Software Flow Chat

1

2

N

4

5

Y

6

7

Y

N

3

18

9

10

Y

N

12

Y

14

19

N

11

13

15

17

N

Y

N

Y

16

Y

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19" LCD Color Monitor AOC 197P+

1) MCU initialize.

2) Is the EPROM blank?

3) Program the EPROM by default values.

4) Get the PWM value of brightness from EPROM.

5) Is the power key pressed?

6) Clear all global flags.

7) Are the AUT O and SELECT keys pressed?

8) Enter factory mode.

9) Save the power key status into EPROM. Turn on the LED and set it to green color. Scalar initializes.

10) In standby mode?

11) Update the lifetime of back light.

12) Check the analog port, are there 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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19" LCD Color Monitor AOC 197P+

6.2 Electric Block Diagram

6.2.1 Main Board

FLASH MEMORY

PM25LV512

(U402)

H sync V sync

RGB

D-Sub

Connector

(CN405)

LCD Interface

(CN101)

Scalar TSUMO56J

(Include: MCU, ADC, OSD etc)

(U401)

RGB

EEPROM

24LC16B

(U403)

DCLK+

DCLK-

DVID

Connector

(CN406)

EEPROM

M24C02

(U404)

EEPROM

M24C02

(U405)

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19" LCD Color Monitor AOC 197P+

6.2.2 Inverter / Power Board

AC input

EMI filter

Start Circuit: R905、R906、 R907、R908、R909、R910

Lamp

OSC and Output Circuit

Feedback Circuit

Bridge Rectifier and Filter

PWM Control IC

DC Convert Circuit

Over Voltage Protect

Transformer

PWM Control IC

Rectifier diode

MOSFET

PWM

Over Voltage Protect

12V

ON/OFF

ON/OFF Control

DIM

5V

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19" LCD Color Monitor AOC 197P+

7. Schematic

7.1 Main Board

15