AOC 2219P2 Service Manual

22" LCD Color Monitor AOC 2219P2

Service

Horizontal Frequency

31-83 KHz

TABLE OF CONTENTS

Description Page Description Page

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

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

Important Safety Notice.……..................……......3

1.Monitor Specification..............................………........4

2.LCD Monitor Description…………………………….......6

3.Operation Instruction…………...............……...........7

3.1.General Instructions...........................…..........7

3.2.Control Button…………….…..............……...............7

3.3.OSD Menu…………….…...........................…............8

4.Input/Output Specification............……………............12

4.1.Input Signal Connector............………….................12

4.2.Power Supply Requirements...............................13

4.3.Factory Preset Display Modes……..........................13

4.4.Panel Specification.....………...…………..................14

5.Block Diagram…..….....................…………................16

5.1.Software Flow Chart……………………....….......16

6.Schematic……………......................................20

6.1.Main Board………..........................................20

6.2.Power Board...……....................................25

6.3.Audio Board...……....................................27

6.4.Key Board...…….............................................28

7.PCB Layout..………….......................................29

7.1.Main Board………........................................29

7.2.Power Board….......................................32

7.3.Audio Board….......................................34

7.4.Key Board…………….....................................35

8.Maintainability……….......................................36

8.1.Equipments and Tools Requirement...............36

8.2.Trouble Shooting…………..............................37

9.White-Balance, Luminance adjustment.............43

10.Monitor Exploded View………..…….…............45

11.BOM List…………………………………............46

5.2.Electrical Block Diagram……………..….......18

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

12.Different Parts List………………............60

SAFETY NOTICE

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22" LCD Color Monitor AOC 2219P2

Revision List

Version Release Date Revision History TPV Model Name

A00 May.11, 2008 Initial release TC72MPDBW1A1DI

TC72MPDTWKWRDQ

A01 July 28, 2008 Add new BOM

TC72MPDLWKCKDQ

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22" LCD Color Monitor AOC 2219P2

Important Safety Notice

Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.

It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected. Hereafter throughout this manual, AOC Company will be referred to as AOC.

WARNING

Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock, fire, or other hazards.

Under no circumstances should the original design be modified or altered without written permission from AOC. AOC assumes no liability, express or implied, arising out of any unauthorized modification of design. Servicer assumes all liability.

FOR PRODUCTS CONTAINING LASER: DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM. CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. CAUTION -The use of optical instruments with this product will increase eye hazard.

TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE MANUAL. Take care during handling the LCD module with backlight unit

-Must mount the module using mounting holes arranged in four corners.

-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel.

-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

-Make certain that treatment person’s body is grounded through wristband.

-Do not leave the module in high temperature and in areas of high humidity for a long time.

-Avoid contact with water as it may a short circuit within the module.

-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)

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22" LCD Color Monitor AOC 2219P2

1. Monitor Specifications

Model number 2219P2 Driving system TFT Color LCD

LCD Panel

Viewable Image

558mm diagoanl

Size Pixel pitch 0.282mm(H) x 0.282mm(V) Video R, G, B Analog lnterface & Digital Interface Separate Sync. H/V TTL Display Color 16.7M Colors Dot Clock 165 MHz Horizontal scan

30 kHz - 80 kHz

range Horizontal scan

473.76mm

Size(Maximum) Vertical scan

55 Hz - 75 Hz

range Vertical scan

296.10mm

Size(Maximum)

Resolution

Physical

Characteristics

Optimal preset

1680 x 1050 (60 Hz)

resolution Highest preset

1680 x 1050 (75 Hz)

resolution Plug & Play VESA DDC2B/CI Input Connector D-Sub 15pin & DVI-D

Analog: 0.7Vp-p(standard), 75 OHM, Positive &

Input Video Signal

DVI-D Digital Interface (TMDS) Power Source 100~240VAC, 50/60Hz Power

Active < 49 W Consumption

Standby < 1 W Speakers 2 x 2W Connector Type 15-pin Mini D-Sub & DVI-D

Signal Cable Type Detachable Dimensions &

Weight: Height (with base) Width Depth

397.9 mm

505.9 mm

249.7 mm

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22" LCD Color Monitor AOC 2219P2

Environmental

Weight (monitor only)

Weight (with packaging)

Temperature: Operating 0° to 40° Non-Operating -20°to 60° 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 )

6.6 kg

8.5 kg

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22" LCD Color Monitor AOC 2219P2

+ 5V

B/L control

Audio

C

ontrol

peakers

2. LCD Monitor Description

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

LCD PANEL

LVDS wire

Inverter Circuit

Adaptor Circuit

+12V

+5V

Audio Board

Scalar Board

S

AC in

Audio in

Key Board

D-SUB in

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22" LCD Color Monitor AOC 2219P2

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 the front of the 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 Source 2 (Auto) / Exit 3 Eco mode / - 4 Volume / + 5 Menu / Enter 6 Power Button & Indicator

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22" LCD Color Monitor AOC 2219P2

3.3 OSD Menu

OSD Function Introduction

 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-buttonto activate it.If the function selected has a sub-menu, press s+ 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.

 Eco Mode hot key : Press the Eco key continuously to select the Eco mode of brightness when there is no

OSD ( Eco mode hot key may not be available in all models).

 Volume adjustment hot key : When there is no OSD , press Volume (+) to active volume adjustment bar,

press - or + to adjust volume ( Only for the models with speakers).

 Source hot key : When the OSD is closed, press Auto/Source button will be Source hot key function (Only

for the models with dual or more inputs) .Press Source button continuously to select the input source showed in the message bar , press Menu/Enter button to change to the source selected.

 Auto configure hot key: When the OSD is closed, press Auto button will be auto configure hot key function.

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22" LCD Color Monitor AOC 2219P2

Function Control Illustration

Luminance Adjust Range Description Brightness 0-100 Backlight Adjustment

Contrast 0-100

Standard

Text

Eco mode

Internet

Contrast from Digital-register.

Standard Mode

Text Mode

Internet Mode

Game

Movie

Game Mode

Movie Mode

Sports Gamma1 Adjust to Gamma1

Gamma2 Adjust to Gamma 2 Gamma Gamma3 Adjust to Gamma 3

Disable dynamic contrast

DCR

Image Setup

Clock 0-100

Phase 0-100

Off

On

ratio Enable dynamic contrast

ratio

Adjust picture Clock to reduce Vertical-Line noise.

Adjust Picture Phase to reduce Horizontal-Line noise

H.Position 0-100

V.Position 0-100

Color Temp.

Adjust the verticalposition of the picture.

Adjust the horizontal position of the picture.

Recall Warm Color

Warm

Normal

6500K

7300K

Temperature from EEPROM.

Recall Normal Color

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22" LCD Color Monitor AOC 2219P2

Temperature from EEPROM.

Recall Cool Color

Cool

sRGB

User

Color Boost

Full Enhance on or off

Nature Skin on or off

9300K

Red

Green

Blue

Temperature from EEPROM.

Recall SRGB Color Temperature from EEPROM.

Red Gain from Digital-register

Green Gain Digital-register.

Blue Gain from Digital-register

Disable or Enable Full Enhance Mode

Disable or Enable Nature Skin Mode

Green Field on or off

Disable or Enable Green Field Mode

Sky-blue on or off

AutoDetect on or off

Demo on or off Disable or Enable Demo

Picture Boost

Frame Size 14-100 Adjust Frame Size

Brightness 0-100 Adjust Frame Brightness

Contrast 0-100 Adjust Frame Contrast

H. position 0-100

Disable or Enable Sky-blue Mode

Disable or Enable AutoDetect Mode

Adjust Frame horizontal Position

V.position 0-100

Bright Frame on or off

Adjust Frame vertical Position

Disable or Enable Bright Frame

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22" LCD Color Monitor AOC 2219P2

OSD Setup

H.Position 0-100

V.Position 0-100

Timeout 5-120 Adjust the OSD Timeout

Transparence 0-100

Language

Extra

Input Select

Auto

Analog

Adjust the verticalposition of OSD

Adjust the horizontal position of OSD

Adjust the transparence of OSD

Select the OSD language

Select to Auto Detect input signal

Select Analog Sigal Source as Input

Digital

Auto Config yes or no

Image Ratio wide or 4:3

DDC-CI yes or no

Information

Reset

Reset yes or no Reset the menu to default

Exit

Select Digital Sigal Source as Input

Auto adjust the picture to default

Select wide or 4:3 format for display Turn ON/OFF DDC-CI Support

Show the information of the main image and sub-image source

Exit Exit the main OSD

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22" LCD Color Monitor AOC 2219P2

4. Input/Output Specification

4.1 Input Signal Connector

Analog connectors

Pin No. Description Pin No. Description

1. Red Video 9. +5V

2. Green Video 10. Ground

3. Blue Video 11. N.C.

4. N.C. 12. DDC-Serial Data

5.

6. Red Ground 14. V-Sync

7. Green Ground 15. DDC-Serial Clock

8. Blue Ground

Detect Cable

VGA connector layout

1 5 6

11 15

Pin No. Description Pin No. Description

1.

TMDS Data 2-

9.

TMDS Data 1-

13.

H-Sync

10

Pin No.

17.

Description

TMDS Data 0-

2.

3.

4.

5.

6.

7.

8. NC 16. Hot Plug Detection 24. RX Clock-

TMDS Data 2+ TMDS Data 2/4 Shield

TMDS Data 4TMDS Data 4+ DDC Clock DDC Data

10.

11.

12.

13.

14.

15.

TMDS Data 1+ TMDS Data 1/3

Shield TMDS Data 3TMDS Data 3+ +5V Power Ground(for+5V)

18.

19.

20.

21.

22.

23.

TMDS Data 0+ TMDS Data 0/5

Shield TMDS Data 5TMDS Data 5+

RX Clock Shield

RX Clock+

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22" LCD Color Monitor AOC 2219P2

4.2 Power Supply Requirements

A/C Line voltage range : 90V ~ 240 V A/C Line frequency range Peak surge current : < 55A peak at 240 VAC and cold starting Leakage current : < 3.5mA Power line surge : No advance effects (no loss of information or defect)

Safety certification : CCC,UL,TUVGS EMC : FCC,CE

4.3 Factory Preset Display Modes

Mode Resolution

VGA 640×480 @60Hz 31.469 59.940 VGA 640×480 @72Hz 37.861 72.809 VGA 640×480 @75Hz 37.500 75.000

Dos-mode 720×400 @70Hz 31.469 70.087

: 50  3Hz, 60  3Hz

with a maximum of 1 half-wave missing per second

Horizontal

Frequency(kHz)

Vertical

Frequency(Hz)

Dos-mode 640×400 @71Hz 31.469 70.087

SVGA 800×600 @56Hz 35.156 56.250 SVGA 800×600 @60Hz 37.879 60.317 SVGA 848x480@60Hz 31.020 60.000 SVGA 800×600 @72Hz 48.077 72.188 SVGA 800×600 @75Hz 46.875 75.000

XGA 1024×768 @60Hz 48.363 60.004 XGA 1024×768 @70Hz 56.476 70.069 XGA 1024×768 @75Hz 60.023 75.029 XGA 1024×768 @75Hz 60.241 74.927 XGA 1280×768 @60Hz 47.776 59.870 XGA 1280×768 @60Hz 47.396 59.995

XGA 1280×768 @75Hz 60.289 74.893 SXGA 1280×1024 @60Hz 63.981 60.020 SXGA 1280×1024 @70Hz 74.882 69.853 SXGA 1360x768@60Hz 47.712 60.015

WSXGA 1680×1050 @60Hz 65.290 59.954

WSXGA+ 1680x1050@60Hz 65.290 59.954

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22" LCD Color Monitor AOC 2219P2

4.4 Panel Specification

4.4.1 General Features

TPM220Z1-PS3 IS A 22” WIDE TFT LIQUID CRYSTAL DISPLAY MODULE WITH 4 CCFL BACKLIGHT

UNIT AND 55PIN RSDS INTERFACE. THIS MODULE SUPPORTS 1680 X 1050 WSXGA+ MODE AND CAN DISPLAY 16.7 M COLORS.

- Super Wide viewing angle.

- Super High contrast ratio

- Super fast response time

- High color saturation

- WSXGA+ (1680 x 1050 pixels) resolution

- RSDS (reduced swing differential signaling ) interface

- RoHS Compliance

4.4.2 Display Characteristics

4.4.3 Electrical Characteristics

(1) TFT-LCD

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22" LCD Color Monitor AOC 2219P2

(2) Backlight

4.4.4 Optical Characteristics

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22" LCD Color Monitor AOC 2219P2

1 2

N

Y

5

Y N

10

Y

N

12

Y N

7

Y

N 6

4

3 9

14

11

13

Y N

15

Y

N

16

17 19

Y

N

18

5. Block Diagram

5.1 Software Flow Chat

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22" LCD Color Monitor AOC 2219P2

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 AUTO 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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22" LCD Color Monitor AOC 2219P2

5.2 Electrical Block Diagram

5.2.1 Main Board

Keypad Interface

(CN403)

SCK SCZ

Flash Memory

PM25LV010A

(U402)

Scalar TSUMO5RCWHQ-LF

Crystal

14.31818MHZ (X401)

Panel Interface

(CN407)

(Include MCU, ADC, OSD)

(U401)

H sync V sync

RGB

D-Sub

Connector

(CN405)

EEPROM

AF24BC16-SI

(U403)

D-Data D-Clock

DVI

Connector

(CN406)

SCL_VGA, SDA_VGA

SCL_DVI SDA_DVI

EEPROM

M24C02

(U404)

EEPROM

M24C02

(U405)

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22" LCD Color Monitor AOC 2219P2

Circuit

5.2.2 Inverter/Power Board

AC input

EMI filter

Bridge Rectifier and Filter

Transformer

Rectifier diodes

Start Circuit: R904, R932, R933

CN902

PWM Control IC

Feedback Circuit

12V

5V

ON/OFF

Output

Transformer

MOSFET

Lamp

Feedback Circuit

PWM

Control IC

Over Voltage

（IC801）

ON/OFF Control

DIM

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