Acer AT2001 User manual

AT2001
Service Guide
PRINTED IN TAIWAN
Service guide files and updates are available
on the AIPG/CSD web; for more information,
please refer to http://csd.acer.com.tw

II
Revision History
Please refer to the table below for the updates made on AT2001 service guide.
Date Chapter Updates

III
Copyright
Copyright © 2005 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.
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 Corporation.
Intel is a registered trademark of Intel Corporation.
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, that you should check the most up-to-date information
available on your regional web or channel. If, for whatever reason, 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.

1
Chapter 1 System Specifications....................................................1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
LCD Panel Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Display Electrical and Function Specifications . . . . . . . . . . . 10
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Mechanism Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Regulatory and Reliability Requirements. . . . . . . . . . . . . . . . 31
Chapter 2 Machine Disassembly and Reassembly.....................35
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Disassembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Removing the Stand Assy . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Removing the IO Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Disassembly the Main Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Chapter 3 Troubleshooting.........................................................44
Chapter 4 FRU(Field Replaceable Unit) List.............................47
Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
FRU List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Chapter 1 1
Features
The chapter describes the function and performance targets for the AT2001 LCD TV which can support PAL
systems.
LCD Panel
TMax. resolution: 800X600
TLamp Quantity:Direct 6 U-lamp
TDisplay area: 20 inches diagonal
TDisplay color: 16.7M(8 bits) colors
TInput Signal: TTL
TContrast ratio: 500:1 (Typical)
TBrightness: 450 cd/m2(Typical)
TResponse TIme: 16ms
TViewing angle: 80o(L)/80o(R), 60o(U)/60o(D)
I/O functions:
TRCA jack for Audio, Video
T21 Pin Euro-SCART(R.G.B)
T15 pin D-Sub for VGA
TS-Din for S-Video
TTV input: PH jack(for PAL system)
TAudio input: Stereo right and left on RCA jack
TAudio output: Earphone jack
Video Functions
TSupport PAL/NTSC/SECAM video format
TSupport 480i,480p format
TBuild in morion adaptive 2D Digital Comb filter
TBuild in Teletext functions
Mechanical
TTilt: 0,+15
TVESA mounting holes
SAP system
TNICAM, FM Stereo(A2)
Power Soutce:
TInput Voltage: 90~264V, 47~63 Hz
System Specifications
Chapter 1

2Chapter 1
TInput current: 1.5A
TMax.Power output: 63 Watts
TStand-by: 5 Watts Max.
Remote COntrollers
TMulti-function remote controller
Speaker
TInternal speaker. 3W*2 stereo, volume adjustable.
Others
TOn screen display adjustment function
TISP(In System Programming) function available for revising driver easily.

5 5
4 4
3 3
2 2
1 1
D D C C B B A A
Decoder SAA7154
Scaler & uP WT8811S
VGA CONNECTOR LCD Panel
Sound Processor AN5891
Audio Amp TPA6011
L,R
L,R
LVDS Tx THC63LVDM83R
Data BUS LVDS BUS
Earphone
Speakers
Data BUS I2C
I2C I2C
C1H-A For PAL Main Board BLOCK
Audio Selector 74HC4052 Page 2
Page 2
Page 4
Page 3 R.G.B._H&V_SYNC
Page 6
Page 7 Page 8 Page 8
Buttons& IR/LED Receiver Board
Page 9,10
POWER DC-DC 15V/15VDDM/12V/9VA_A/5V/5VA/5V_AUD/5V_7154 3VDDM/3.3V/3.3VA/2.5VDDM/1.8V/1.8VA
I/O BOARD Connector
DVD CONNECTOR
Sound(L,R) Input
PC Sound Input
PC Sound(L,R)
Page 2
Teletext
Page 5
PAL(OPTION) Tuner
HEAD_PHONE
SCART Signal
CVBS_TTxTeletext
R,G,B
H-Sync V-Sync
I2C
I2C=48H/49H I2C=82H
I2C=0X60H
DVD Sound(L,R)
DVD Video
DVD Board
Page 2
NTSC(OPTION)
Tuner Y,Cb,CrS1AV1AV1 S1
MUTE
TTL_BUS
AV2/OPTION
OPTION
10 PAGE DATA
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4 4
3 3
2 2
1 1
D D C C B B A A
C1H-A PAL I/O Board BLOCK Diagram
TO M/B
Page 2
Tuner FQ1216MK3
Page 3
AV RCA Connector S-Video
Page 3Page 3
SCART Connector
Page 4
Sound Processor MSP 3415G
Page 5
CVBS1
AF
SCART IN(L,R)
SCART OUT(L,R)
Page 5
Audio Switch
AV(L,R)
TV(L,R)
L,R
Y C
CVBS2
M/B BLOCK
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Pin Definition Between Main Board andI/O Board

LCDPanel Characteristics
General Description
This LCD TV adopts AU display modules which are color active matrix thin film transistor(TFT)
liquid crystal display(LCD) that uses amorphous silicon TFT as a switching device. This model is
composed of a TFT LCD panel, a driving circuit and a backlight system. This TFT LCD has a
20 inch diagonally measured active display area with SVGA resolution ( 600 vertical by 800
horizontal pixel array).
( Please refer to panel specification for detail and updated information )
General Information
Item Specification Unit
Outline Dimension 448(W) x 347 (H) mm
Display area 20.1 inches Diagonal inch
Number of pixel 800(H)x600(V) pixels
Pixel pitch 0.51(H) X 0.51 (V) mm
Pixel arrangement RGB Vertical stripe
Display color 16.7 M colors (8 bits)
Display mode T N-Type Normally white +SWV Film
Surface treatment Anti-Glare type
Weight Max.3500 g
Lamp Quantity Direct 6 U-lamp
Input signal TTL
Panel Power consumption 5 W
Optimum viewing direction 6 o’clock

Optical Characteristics
Optical characteristics are determined after the unit has been ‘ON’ and stable for arround 2Hrs
in a dark environment at 25 °C. The values specified are at an approximate distance 50cm from
the LCD surface at a viewing angle of F and q equal to 0 °.
Parameter Symbol Conditi
on
Min. Typ. Max. Unit Remark
Viewing
L/R
TOP CR>10 55 60 Deg.
【Note 3,6,8】
angle
U
BUTTON 55 60 Deg.
LEFT 65 80 Deg.range
D
RIGHT 65 80 Deg
Contrast ratio
ＣＲn θ=0°400 500 −
【Note3,4,6】
Response time τ−16 ms
【Note 5】
Rise time τr 5 ms
Fall time τd 11 ms
Gray to gray 16 ms
Chromaticity of Wx 0.243 0.273 0.303
White (CIE 1931) Wy 0.262 0.292 0.322
Chromaticity of Rx 0.612 0.642 0.672
Red (CIE 1931) Ry 0.307 0.337 0.367
Chromaticity of Gx 0.254 0.284 0.314
Green (CIE 1931) Gy 0.585 0.615 0.645
Chromaticity of Bx 0.111 0.141 0.171
Blue (CIE 1931) By 0.038 0.068 0.098
Luminance of white
【Note4】
Ｙ
Ｌ
350 450 Cd/m2
【Note4,7】
White Uniformity δ
Ｗ
70 %
【Note 3,9】
※The measurement shall be executed 30 minutes after
li ghting at rating.
FIG. 1 Optical Characteristic Measurement Equipment and
Ta:25±2 °C, V
LCD
:5.0V, fV:60Hz,
Dclk:80MHz, Luminance Ratio:100%
LCD Module
Optical Stage(x,y) Pritchard 880 or
equivalent
500mm

Note 1: Ambient temperature = 25℃. Note
2: To be measured in dark room after backlight warm up 30 minutes. Note
3: To be measured with a viewing cone of 1°by Topcon luminance meter ELDIM
EZContrast 160D.
Note 4: To be measured with the detector PR880
Note 5: Definition of response time: The output signals of BM-7 are measured when the input
signals are changed from “Black” to “White” (falling time) and from “White” to “Black” (rising
time), respectively. The response time interval between the 10% and 90% of amplitudes. Refer
to figure as
The response time is defined as the following figure and shall be measured by switching the
input signal for “black” and “white”.
Note 6. Definition of contrast ratio: Contrast ratio is calculated with the following formula.
Contrast ratio (CR)= Brightness on the "white" state
--------------------------------------
Brightness on the "black" state
Note 7: Driving conditions for CCFL: IL= 6.5 mA, 52KHz Frequency.
Response Time
Tr TfD
100
90
Optical
Response

Note 8: Definition of viewing angle:
Note 9: Definition of white uniformity:
White uniformity is calculated with the following formula.
Luminance are measured at the following thirteen points (1~13).
ΔW= Minimum Brightness of 13 points
-----------------------------------------
Maximum Brightness of 13 points
Normal Y
E
φ
θ
φ= 0°, Right
φ= 180 °, Left
φ= 270 °, Down
φ= 90°, Up

Display Electrical andFunctional Specifications
Input and Output Signals
This LCD TV shall have the ability to operate under following range with stable blue
color of LED indicated. Any signal outside of the limits (any combination) shall not cause any
damage to the unit or driving source. The range of operation is:
z
PAL( 4.43M ) Receivable VHF/UHF/CATV, channels Auto-preset tuning,
PAL ( 4.43 M , 50 Hz ) B、G、D、K、H、I, PAL ( 4.43 M , 60 Hz )
SECAM D、K
zTV system
PAL and SECAM system Receivable
Full frequency range From channel E2 ( 48.25 MHz ) to channel E69 ( 855.25 MHz)

zVGA input
Horizontal input frequency range 30kHz to 60kHZ
Vertical input frequency range 56 Hz to 75 Hz
Max. Resolution 800X600
The LED shall indicate green color and OSD will show “ Out of Range “ message within 5 seconds after
signal is out of range or down scaling support from selected inpu
The LED shall indicate green color and OSD will show “ No Signal “ within 3 seconds while there is
missing signal from selected input.
Videoinput
CVBS Input Signal
Type : Analog
Polarity : Positive
Level : 1Vp-p ( with Sync.)
Impedance :75Ω± 5%
Interface : RCA jack, Yellow color
S VideoInput Signal
Type : Analog
Polarity : Positive
Level : Y : 1Vp-p ( with Sync.) C : 0.286Vp-p
Impedance :75Ω± 5%
Interface : DIN jack
SCART ( R.G.B) Input Signal
Type : Analog
Polarity : Positive
Impedance :75Ω± 5%
Interface : 21 Pin Euro-SCART
Audioinput, output and Speaker
Audioinput
Level : 500mVrms
Type : Stereo R/L Channels
Impedance :More than 22kΩ
Jack : RCA jack ,
Right channel : Red color.
Left Channel : White color

PC Stereo Input
Level : 500mVrms
Type : Stereo R/L Channels
Impedance : More than 22kΩ
Jack : 3.5mm Stereo jack , Black color
Headphone output:
Level: 0.5W rms/per Channel(typ.) for 16 ohm earphone
Type: Stereo R/L Channels
Jack: 3.5mm Stereo
Built-in Speaker
Max. Audio output ( at 10% THD max. ) at 1.0Vp-p / 1kHZ input : 2W + 2W
Sound Distortion at 250mW/1kHZ : 1% THD max.
Speaker: Two of 3W
Speaker impedance: 4 ohms at 1kHZ
Residual Hum at Min. Volume : 500uW Max.
Max. Hum at Max. Volume : 1000uW Max.
Audio Lineout
Output level: 400Vrms.
Type: stereo R / L channels.
Jack: 3.5 m/m stereo jack.

RF Input
Indication of input level : 75Ωterminate value
No. PARAMETER MIN TYP MAX UNIT NOTE
1 Video Output Level 0.6 0.9 1.2 Vp-p
2 Video S/N 40 45 --- dB
3 Noise limiting --- 38 45 dbuV
2 MHz --- 0.0 -1.5 dB
3 MHz --- -0.5 -2.5 dB
4 Video amplitude
at discrete
frequencies
4.43 MHz --- -1.0 -4.0 dB
5.5/6M
hz 42 --- dB5 Sound carriers rejection
6.5
MHz
40 --- dB
6 Audio S/N 50 63 --- dB
7 Frequency Range for PAL 55.25 801.2
5 MHZ
8 Audio sensitivity
40 dBuV
VGA Input
SeparateSync:
Level: Low = 0 to 0.8V High = 2.0 to 5 V
Polarity: Positive or Negative
Impedance: 1 k ohm or higher
R.G.B.Input Signal: (complywithVESA)
Level: 0 to 700mv Positive
Rise/Fall time: < 5ns
Overshoot: < 10% of maximum transition.
Impedance: 75Ω± 5%
CurrentSinkandSource
When low level is asserted, the maximum current sink from any single monitor sync input node to the
driver is 2.0mA. When high level is asserted, the maximum current source from the driver to any single
monitor sync input node is 500uA.

D-Sub Pin Out ( Pantone 661C, Blue color )
PIN Signal PIN Signal
1 Red Video 9 +5V ( PC97 )
2 Green Video 10 VGA-CONN(Sync
GND)
3 Blue Video 11 Ground
4 Ground 12 SDA ( DDC Data )
5 Ground 13 Horizontal Sync
6 Red Ground 14 Vertical Sync
7 Green Ground 15 SCL ( DDC Clock )
8 Blue Ground
Terminals Configuration
RF 75ΩDIN45325 ( IEC169-2 ) Type
AV 1, S1 RCA for CVBS, Audio R / L S Din for S-Video
SCART SCART for R.G.B and Audio R / L
PC Analog Port D-sub 15pin VGA
PC Stereo input 3.5mm∮Earphone Jack
Headphone 3.5mm∮Earphone Jack
Service Port ISP through D-sub