Acer B223PWL Bedienungsanleitung

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CER_LCD_B223PWL_V223PWL_SM20

120424V0

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Contents

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Table of Contents

Important Safety Notice .............................................................................................................................. 1

1. Product Specification.............................................................................................................................. 2

2. OSD Menu ............................................................................................................................................ 16

3. Exploded Diagram ................................................................................................................................ 20

4. Assembly and Disassembly Procedures .............................................................................................. 24

5. Troubleshooting .................................................................................................................................... 38

6. Firmware Upgrade Process.................................................................................................................. 42

7. Writing EDID Process ........................................................................................................................... 53

8. FRU (Field Replaceable Unit) List ........................................................................................................ 59

9. Schematics and Layouts ...................................................................................................................... 63

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Safety Notice

Any person attempting to service this chassis must familiarize with the chassis and be aware of the necessary safety

precautions to be used when serving electronic equipment containing

high voltage.

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1

Important Safety Notice

Product Announcement:

This product is certificated to meet RoHS Directive and Lead-Free produced definition. Using approved

critical components only is recommended when the situation to replace defective parts. Vender assumes no

liability express or implied, arising out of any unauthorized modification of design or replacing non-RoHS

parts. Service providers assume all liability.

Qualified Repairability:

Proper service and repair is important to the safe, reliable operation of all series products. The service

providers recommended by vender should being aware of notices listed in this service manual in order to

minimize the risk of personal injury when perform service procedures. Furthermore, the possible existed

improper repairing method may damage equipment or products. It is recommended that service engineers

should have repairing knowledge, experience, as well as appropriate product training per new model

before performing the service procedures.

NOTICE:

! To avoid electrical shocks, the products should be connect to an authorized power cord, and turn off the

master power switch each time before removing the AC power cord.

! To prevent the product away from water or explosed in extremely high humility environment.

! To ensure the continued reliability of this product, use only original manufacturer’s specified parts.

! To ensure following safety repairing behavior, put the replaced part on the components side of PWBA, not

solder side.

! To ensure using a proper screwdriver, follow the torque and force listed in assembly and

disassembly procedures to screw and unscrew screws.

! Using Lead-Free solder to well mounted the parts.

! The fusion point of Lead-Free solder requested in the degree of 220°C.

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2

1. Product Specification

1.1 Scope:

The M220ZGE-L20 model is a 22 inch wide TFT-LCD slimming module with a WLED light bar Backlight Unit

and a 30-pin 2ch-LVDS interface. This module supports 1680 x 1050 WSXGA+ (16:10 wide screen) mode

and displays up to 16.7 millions colors. The converter module for the Backlight Unit is not built in.

General display parameters:

Optical Characteristics:

The optical characteristics are measured under stable conditions at 25℃:

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3

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4

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5

1.2 General Requirements:

1.2.1 Test Condition:

All tests must be performed under “standard testing conditions” unless otherwise specified.

Warm up time > 30 min.

AC supply voltage 230V± 5%, 50± 3 Hz

Ambient temperature 20C 15C

Humidity 65% 20%

Display mode 1680x1050, 60 Hz, Pixel Clock：148.5MHZ,all white

e-color mode Set to “User” mode

Contrast control Set to The value under user mode, which allows that the

brightest two of 32 linear distributed gray-scales (0～700mv)

can be distinguished.

Color temperature 6500°K

Brightness control The value under user mode

Analog Input signal 700 mVss

Picture position and size Factory preset value,

Viewing angle 90 ° H and V

Viewing distance 40 cm for LCD performance, 20 cm for LCD failures

Ambient illumination Dark room (< 1 cd/m2)

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1.2.2 Test Equipment: CHROMA 6630.

1.3 Electrical:

This section describes the electrical requirement of the monitor. Below is the block diagram.

The LCD monitor will contain a main 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. The function key board is used for OSD control,

monitor power ON/OFF and the LED indicator for power status.

AC-IN

100V-240V

Power board

Flat Panel and

LED backlight

Main Board RS232 Connector

For white balance

adjustment in factory

mode

LED Drive.

Video signal, DDC

HOST Computer

Key Board

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6

1.3.1 Interface Connectors:

1.3.1.1 Power Adaptor and Connector:

The AC inlet connector shall be an IEC 320-C13 male power receptacle for connection to mains

power. The power cord shall be gray or black with length of 1.8m + 10cm/-0cm. The power cord type

is worldwide type.

1.3.1.2 Analog Connector, DVI Connector and Cable: The analog signal cable shall be Gray or black and

1.8m + 10cm/-0cm. The DVI signal cable shall be Gray or black and 1.8m + 10cm/-0cm.

A. D

SUB

PIN No. Description PIN No. Description

1 Red Video 9 +5 v

2 Green Video 10 Logic Ground

3 Blue Video 11 Monitor ground

4 Monitor ground 12 DDC-Serial Data

5 DDC-Return 13 H-Sync.

6 Red Ground 14 V-Sync.

7 Green Ground 15 DDC-Serial Clock

8 Blue Ground

B. DVI

PIN No. Description PIN No. Description

1 TMDS data 2- 13 NC

2 TMDS data 2+ 14 +5V Power

3 TMDS data2/4 Shield 15 GND(return for +5v,hsync,vsync)

4 NC 16 Hot Plug Detect

5 NC 17 TMDS data 0-

6 DDC Clock 18 TMDS data 0+

7 DDC Data 19 TMDS data 0/5 Shield

8 NC 20 NC

9 TMDS data 1- 21 NC

10 TMDS data 1+ 22 TMDS Clock Shield

11 TMDS data1/3 Shield 23 TMDS Clock +

12 NC 24 DDC TMDS Clock-

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7

C. Power Board Connector

Power c

nnector:

CN902

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D. Key Board Connector

Connector

CN001

E. Flat Panel Connector

Connector

CN401

Pin Signal

1 MUTE

2 VOL

3 USB_CTRL

4 ON/OFF

5 DIM

6 +5V

7 +5V

8 NC

9 GND

Pin Signal

1 LBADC1

2 LBADC2

3 POWER Key

4 LED_BLUE#

5 LED_RED#

6 GND

Pin Signal Pin Signal

1 PANEL_ POWER 16 RXE1-

2 PANEL_ POWER 17 GND

3 PANEL_ POWER 18 RXE0+

4 GND 19 RXE0-

5 NC 20 RXO3+

6 NC 21 RXO3-

7 GND 22 RXOC+

8 RXE3+ 23 RXOC-

9 RXE3- 24 GND

10 RXEC+ 25 RXO2+

11 RXEC- 26 RXO2-

12 RXE2+ 27 RXO1+

13 RXE2- 28 RXO1-

14 GND 29 RXO0+

15 RXE1+ 30 RXO0-

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8

1.3.2 Input Signals:

Video Input Signals Range (Analog RGB Signal)

No.

mbo

Item

Uni

rizontal

equen

Ver tic al

uen

55 75 Hz

el Clock

uen

148.5 MHz

el I

2.4 5 V

il Low

vel

Inpu

0.8

deo

RGB

Ana

deo

0.7

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1.3.2.1 Video Signal Amplitudes:

The video inputs consist of Red, Green and Blue signals each has its own coaxial cable terminated at

the monitor. These video signals are analog levels, where 0V corresponds to black, and 700mV is the

maximum signal amplitude for the respective color. The video signal is terminated with 75 ohms.

1.3.2.2 Video Signal Termination Impedance:

The analog video signal termination shall be 75 ohm.

1.3.2.3 Synchronization (Sync) Signals:

The Horizontal Sync (HS) TTL signal is used to initiate the display of a horizontal line. HS may be

either active high or active low according to the timing. The Vertical Sync (VS) TTL signal is used to

initiate the display of a new frame. VS may be either active high or active low according to the timing.

1.3.2.4 Sync Signal Levels:

Level: L = 0V ~ 0.8V H = 2.4V ~ 5V

1.3.2.5 Abnormal Signal Immunity:

The monitor shall not be damaged by improper sync timing, pulse duration, absence of sync,

abnormal input signal amplitude, or any other anomalous behavior of a graphics card.

1.3.3 User Controls and Indicators:

1.3.3.1 Power On/Off Switch:

The monitor shall have a power control switch visible and accessible on the front of monitor.

1.3.3.2 Power Indicator LED:

The monitor will be switched to "power saving" mode by the control signal from the display controller,

as indicated by the amber-colored power LED.

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