Acer AT4230B User manual

Acer AT4230B LCD TV
ServiceGuide
PRINTED IN CHINA
Service guide files and updates are available on
the ACER/CSD web. For more information,
please refer to http://csd.acer.com.tw

Revision History
Please refer to the table below for the updates of LCD TV AT4230B service guide.
Date Chapter Updates
2007/7/20 Chapter1~ 4 1st edition
II

Copyright
Copyright®2006 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language or computer
language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or
otherwise, without the prior written permission of Acer Incorporated.
III

Disclaimer
The information in this guide is subject to change without notice.
Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular
purpose. Any Acer Incorporated software described in this manual is sold or licensed “as is”. Should the
programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or
its dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential
damages resulting from any defect in the software.
Acer is a registered trademark of Acer Incorporated.
Other brand and product names are trademarks and/or registered trademarks of their respective holders.
IV

Conventions
The following conventions are used in this manual.
SCREEN MESSAGES Denotes actual messages that appear on screen.
NOTE Gives bits and pieces of additional information related to
the current topic.
WARNING Alerts you to any damage that might result from doing
or not doing specific actions.
CAUTION Gives precautionary measures to avoid possible
hardware or software problems.
IMPORTANT Reminds you to do specific actions relevant to the
accomplishment of procedures.
V

Preface
Before using this information and the product it supports, please read the following general information.
1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION
decided for Acer's “global” product offering. To better fit local market requirements and enhance
product competitiveness, your regional office MAY have decided to extend the functionality of a machine
(e.g. add-on card, modem, or extra memory capability). These LOCALIZED FEATURES will NOT be
covered in this generic service guide. In such cases, please contact your regional offices or the
responsible personnel/channel to provide you with further technical details.
2. Please note WHEN ORDERING FRU PARTS, you should check the most up-to-date information available
on your regional web or channel. For whatever reason, if a part number change is made, it will not be
noted in the printed Service Guide. For ACER-AUTHORIZED SERVICE PROVIDERS, your Acer office may
have a DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You
MUST use the list provided by your regional Acer office to order FRU parts for repair and service of
customer machines.
VI

Chapter1 1
Chapter 1
System Specification
Specification
LCD Panel
Max. resolution: 1366 x 768
Display color: 16.7 M colors
Life Time: 60,000 Hours
Input Signal: 1-ch LVDS
Contrast ratio: 1000:1 ( Min)
Brightness: 400 Cd/m² ( Min )
Response Time: Gray to Gray Tr = Tf = 8 ms
Viewing angle: 89° ( L ) / 89° ( R ), 89° ( U ) / 89° ( D )
I/O functions
RCA jack (YUV and CVBS ) for YPbPr, YCbCr, Video and Audio
4 pin S-DIN for S-Video
15 pin D-Sub for VGA
19 pin HDMI connector
DIN45325 (IEC169-2) Terminal for TV / CATV input
DIN45325 (IEC169-2) Terminal for DVB-T input
3.5 mm∮Earphone jack for Audio Line input
Video Functions
Support PAL / NTSC / SECAM video format
Support 480i/576i, 480p/576p, 1080i and 720p format
Build in Teletext functions
Build in Dynamic adaptive smoothing filter
Build in Dynamic temporal frame-filtering Noise Reduction
Build in Dynamic motion and edge adaptive De-interlacing
Film mode 3:2 & 2:2 pull down
Screen display model 16:9 / 4:3 / panorama / Letterbox1/ Letterbox2/ Letterbox3
Mechanical
VESA mounting holes

2Capter1
Compatibility
Multi-Sound system
NICAM
FM Stereo (A2)
Power Source
Input voltage: 90 ~ 264 V, 47 ~ 63 Hz
Power consumption: 291 Watts
Stand-by: 5 Watts Max.
Remote controllers
Multi-function remote controller
Speaker
Internal speaker: 10 W x 2
Amplifier: 8 W x 2 stereo, volume adjustable
Others
On screen display adjustment function
ISP (In System Programming) function available for revising driver easily

System Block & Wiring Diagram
Chapter1 3

LCD Main Board Block Diagram
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Remote Control
Chapter1 5
Key Functions
Remote Function description
R/C for Australia Key Functions Remark (for cardreader)
Power Power On/Off
Display Display Channel and Input Source
Mute Mute On/Off
TV Analogue TV / Digital TV
Component Component1/Component2
AV AV1/AV2/AV3/HDMI1/HDMI2
PC VGA
Sleep Sleep Timeer Off 15/30/45/60/90/120

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Wide Scaling Mode ( 4:3 /16:9 /Panorama /Letterbox )
Menu Open Menu or leave Menu
EPG
In digital TV mode, press the key to launch EPG main
page
Enable in Digital TV mode only.
1. In Di
g
ital TV mode, Press the key to launch ch list main
page.
2. In Non Digital TV source, Press this key will show
CH List “This function is only use in DTV source message”
Four way direction key
Navigate up in the OSD,
ATV: next page or sub page in teletext mode
up DTV: next page in teletext mode
Navigate down in the OSD,
ATV: previous page or sub page in teletext mode
down DTV: previous page in teletext mode
Navigate left in the OSD,
left DTV: previous sub page in teletext mode
Navigate right in the OSD,
right DTV: next sub page in teletext mode
OK Selection Confirm
1 Number key 1
2 Number key 2
3 Number key 3
4 Number key 4
5 Number key 5
6 Number key 6
7 Number key 7
8 Number key 8
9 Number key 9
0 Number key 0
Recall Return to previous channel
Enter Enter to confirm channel selection by number key
Channel UP Channel up
Channel Down Channel down
NICAM
STEREO Broadcast : Stereo/Mono
BILIGUAL Broadcast : Sound 1 / Sound 2
MONAURAL Broadcast: Mono
FM-FM
MPX
STEREO Broadcast: Stereo/Mono

Chapter1 7
BILINGUAL Broadcast : Sound 1 / Sound 2
DTV multi-audio selection
Volume up Volume up
Volume down Volume down
Teletext/Mix Teletext on -> Mixed mode on ->Teletext off
Index Go to index page (usually page 100) in teletext mode
ATV: Enter/Leave subpage mode
Subpage
DTV: Simulated as Right key operation to change sub
page in teletext mode.
Reveal Display Hidden Information
1.When in teletext pages, press this button temporarily
holds the current teletext page
Hold
2.When in the TV Mode, pressing Hold key do freeze
function on active video
When in teletext pa
g
es, this key Zoom pa
g
e to
gg
le 1X/2X
and page selection by Up-arrow and Down-arrow
HDMI1/HDMI2
Size Select Scan mode Auto -> Underscan -> Overscan
Subtitle Show subtitle on the screen
R Colour button to operate the teletext
G Colour button to operate the teletext
Y Colour button to operate the teletext
C Colour button to operate the teletext
Functionalities of color keys
vary in different
screens/modes, which could
be for navigation or special
function, subject to be
specified on individual
screen

Hardware Specification and Configuration
Electro/Optical
Model AT4230B
Panel specification
Resolution(pixels) 1366x768
Brightness(min.) 400 cd/m²
Contrast ratio(min.) 1000:1
Display color 16.7 M
Viewing angle 178(H)/178(V)
Response(typ.) 8ms
Power supply
Input 90-264 V, 47-63 Hz
Max. power Consumption 175W
Power saving 5W
Mechanical
Dimensions(WxHxD mm) 983.0x576.0x52.7
Weight(Kg) 15
Analog TV system
TV color system PAL/SECOM
Sound system Sound 1 and Sound 2
Stereo system NICAM and FM Stereo (A2)
Analog TV-tuner Quantity 1
Terminal
RF 75ΩDIN45325 ( IEC169-2 ) Type
RF (DVB-T) 75ΩDIN45325 ( IEC169-2 ) Type
AV 1 RCA Jack for CVBS, S-Video and Audio
AV 2RCA JackforCVBS,S-Videoand Audio
AV 3 RCA for YPbPr or CVBS and Audio R/L
Component 1 RCA Jack for YUV and Audio
Component 2 RCA Jack for YUV and Audio
PC Analog Port D-Sub 15 pin VGA
PC Stereo input 3.5 mm∮Earphone Jack
HDMI1 19 pins HDMI single link
HDMI2 19 pins HDMI single link
Service Port ISP through D-Sub
Audio system
Speaker 10 W x 2
8Capter1

Firmware Specifications
Preset Mode for VGA Input
16 factory pre-set modes for VGA inputs are saved during the manufacturing process.
Please press "Volume-" + "Channel+" + "POWER" to enter the LCD TV factory mode.
Preset
mode Pixel Format
Hor. Freq.
(kHz) Hor. Polarity
Vert. Freq.
(Hz)
Vertical
Polarity Standard
1 720*400 31.47 - 70 + VGA
2 640*480 31.47 - 60 - VGA
3 640*480 37.861 - 72 - VESA
4 640*480 37.5 - 75 - VESA
5 640*480 43.4 - 85 - VESA
6 800*600 35.156 - 56 + VESA
7 800*600 37.879 + 60 + VESA
8 800*600 48.077 + 72 + VESA
9 800*600 46.875 + 75 + VESA
10 800*600 53.7 + 85 + VESA
11 1024*768 48.363 - 60 - VESA
12 1024*768 56.476 - 70 - VESA
13 1024*768 60.023 + 75 + VESA
14 1024*768 68.7 + 85 + VESA
15 832*624 49.7 - 75 - MAC
16 1024*768 60.2 - 75 - MAC
Preset Mode for HDMI Input
16 factory pre-set modes for DVI inputs are saved during the manufacturing process.
Preset
mode Pixel Format
Hor. Freq.
(kHz) Hor. Polarity
Vert. Freq.
(Hz)
Vertical
Polarity Standard
1 640*480 60 31 - 60 - VGA
2 640*480 72 37 - 72 - VESA
3 640*480 75 37 - 75 - VESA
4 640*480 85 43 - 85 - VESA
5 800*600 56 35 + 56 + VESA
6 800*600 60 37 + 60 + VESA
7 800*600 72 48 + 72 + VESA
8 800*600 75 46 + 75 + VESA
9 800*600 85 53 + 85 + VESA
10 1024*768 60 48 - 60 - VESA
11 1024*768 70 56 - 70 - VESA
12 1024*768 75 60 - 75 - VESA
Chapter1 9

13 1024*768 85 68 + 85 + VESA
14 1280x768 60 48 - 60 + VESA
15 1360x768 60 48 + 60 + VESA
This LCD TV shall have 10 or more user modes for user to creat own timing.
Power Saving
While VGA is selected to be input, this LCD TV is equipped with a power-management according to VESA
DPMS. There is a delay of 30 seconds before the transition from On-state to power saving state to avoid
unintentionally entering of a power saving state during display resolution and timing mode changes. During
the period of delay, the LED shall indicate green color and OSD will show “ NO VGA CONNECTION “.
Transition from any power saving state to another can be instantaneous. The recovery from Off-state
requires no manual power on.
Mode Hsync Vsync Video Power Indication Recovery
time
Power-On On On Active < 291W Green --
Stand-by Off On Off < 5W Red <5s
Suspend On Off Off < 5W Red <5s
Off-state Off Off Off < 5W Red <5s
Power off × × × < 5W Dark Turn on < 5s
Sync on means: normal operation
Sync off means: Hsync: f < 1 KHz, duty cycle > 25 %, Vsync: f < 10 Hz, duty cycle > 25 %
The power-consumption is valid over the specified voltage and frequency range.
Power comsuption is measured from AC source.
There are no power saving modes for TV, AV1, AV2 or AV3, compoment 1/2 and HDMI 1/2 inputs.
Performance Specifications
The performance shall be check at 25oC environment.
White Balance and Uniformity
Set contrast and brightness Contrast=50 Brightness=50.
Inspection tolerance for 76PA as below: Brightness 325~425 nits
Cold:14000 degree K(x=0.266,y=0.270)±0.015, on x and y value.
Standard:9300 degree K(x=0.285,y=0.293) ±0.015, on x and y value.
Warm: 6500 degree K(x=0.314,y=0.324) ±0.015, on x and y value.
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Display Area, Phase, Center and Tilt
Display Area: 32 inches diagonal
H-Phase: A-B Less than 1.5mm
V-Center: C-D Less than 1.5mm
Tilt: E-F Less than 1.5mm, but non-active area must be larger than zero for four sides.
A
E
D
CF
B
Max. Brightness
The brightness should exceed 400 Cd/m2 while set both of contrast and brightness to max. and color
temperature of Standard is selected. ( Typical value would be 500 Cd/m2 ).
Power Supply Electrical Specifications
The power supply for this product is an internal converter, with a non-replaceable fuse internally. This
converter shall be well designed to meet CE mark requirement.
Input Voltage and Frequency Range
The operating range of line voltage shall be: AC 100 volts to 240 volts, 50 Hz to 60 Hz. Power comsuption
shall be under 291 Watts. Variation of the line voltage throughout the applicable operating range shall not
result in any visible image anomalies such as image movement, changes in light output, nor changes in
image stability or quality.
Line Fuse
The AC input shall be fused and become electrically open as a result of an unsafe current condition. This
fuse is inside the power supply converter and is not user replaceable, and must be returned for replacement.
This fuse shall be well selected to handle inrush current for all combinations of line voltage and frequency.
Hot plug and power on/off sequence
Once hot plug occurs, at the very first time, the initial current should be limited at 2.3 amps or lower when
power off. Current will stay below 100 m amps while power on, then ramp up to full power ( about 2.3 amps
at AC 120 volts ) within 5 seconds when power-up signal is triggered. For the shut down sequence, the
current will stay at full power for about 150 m seconds or less, then ramp down to 100 m amps within 1
Chapter1 11

second.
Power on LED Location and Type
Power on indicator shall be easily visible from the front of the display.
Inverter
The inverter which is used to light up back-light of LCD panel shall be well designed to meet requirement of
panel’s specification.
Overall Dimensions
Height: 794 mm
Width: 1071 mm
Depth: 311 mm
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Environmental Requirements
This display shall meet the following environmental requirements under normal operating conditions.
Operating
25° ± 5° for Purity, White Point, Mis-convergence, Luminance measurements and White uniformity
measurement
Operating temperature: 0°C to 35°C
Operating humidity: 10 % to 90 % ( non-condensing )
Storage and Shipping
Storage temperature: -20°C to 60°C
Shipping temperature: -20°C to 60°C
Storage humidity: 10 % to 90 % ( non-condensing )
Shipping humidity:10 % to 90 % ( non-condensing )
Altitude
Units tested at an altitude up to 12,000 feet must operate at normal conditions without exhibiting abnormal
behavior such as arcing or shutdown.
Operating altitude:0 to 12,000 feet
Shipping altitude: 0 to 40,000 feet
Storage altitude: 0 to 40,000 feet
Vibration Test
The packaged display shall be capable of passing sinusoidal vibration test as specified in follows.
A. Test condition as below :
Chapter1 13

B. The unit under test shall be run for a duration of 30 minute in each of following
orientations :
a. Top and bottom side (z axis).
b. Left and right side (x axis).
c. Front and rear side (y axis).
The unit shall suffer no visible cosmetic damage and should operate no degradation indisplay quality after
test.
Additionally, prior to production and prior to implementation of any design or manufacturing change that
might affect vibration performance, an minimum of 2 units shall be demonstrated to meet the requirements
of specification.
Drop Test
The packaged display shall be capable of passing drop test as specified in following specification without any
measurable degradation in performance or detectable mechanical or cosmetic damage.
Filter: 330 Hz
Dropping way: 1 corner, 3 edges, 6 flats
Dropping Height: follow the below table
Weight(kg) Corner, edge, F, R,
Btm(cm)
L, R, Up side(cm)
0~9 76 76
9~17 61 61
18~27 46 46
27~45 31 20
45~100 25 15
Additionally, prior to production and prior to implementation of any design or manufacturing change that
might affect vibration performance, a minimum of 2 units shall be demonstrated to meet the requirements
of specification.
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