BenQ T201WA User manual

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l
Product Service Manual – Level 2Product Service Manual – Level 2
Service Manual for BenQ:Service Manual for BenQ:
T201WAT201WA
P/N: 9J.07N72.39xP/N: 9J.07N72.39x
Applicable for All RegionsApplicable for All Regions
Version: 002Version: 002
Date:2007/5/17Date:2007/5/17
Notice:Notice:
- For RO to input specific “Legal Requirement” in specific NS regarding to responsibility and liabilit- For RO to input specific “Legal Requirement” in specific NS regarding to responsibility and liabilit
y
statements.
- Please check BenQ’s eSupport web site, http://esupport.benq.com, to ensure that you have the most
recent version of this manual.
First Edition (June, 2006)
© Copyright BenQ Corporation 2006. All Right Reserved.

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Content Index
Abbreviations & Acronyms......................................................................................................................3
1. About This Manual...............................................................................................................................3
1.1. Trademark..........................................................................................................................3
2. Introduction..........................................................................................................................................4
2.1. RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS. .................4
2.2. Safety Notice.....................................................................................................................4
2.3. General Descriptions.........................................................................................................4
2.4. Related Service Information..............................................................................................4
3. Product Overview...............................................................................................................................5
3.1. Specification......................................................................................................................5
3.2. Customer Acceptance.......................................................................................................19
4. Disassembly /Assembly .......................................................................................................................25
4.1. Exploded View .................................................................................................................25
4.2. Disassembly /Assembly ....................................................................................................26
5. Level 1 Cosmetic / Appearance / Alignment Service...........................................................................28
5.1 Software / Firmware Upgrade Process ..............................................................................28
5.2. Alignment procedure (for function adjustment).............................................................36
6. Level 2 Circuit Board and Standard Parts Replacement .....................................................................42
6.1. Block diagram ..................................................................................................................42
6.2. TROUBLE SHOOTING GUIDE .....................................................................................53
6.3. Spare Parts List.................................................................................................................56
Appendix 1 – Screw List / Torque.......................................................................................................................................... 57
Appendix 2 Physical Dimension Front View and Side view .................................................................................................. 57

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Abbreviations & Acronyms
1. About This Manual
This manual contains information about maintenance and service of BenQ products. Use this
manual to perform diagnostics tests, troubleshoot problems, and align the BenQ product.
1.1. Trademark
The following terms are trademarks of BenQ Corporation:
BenQ
Importance
Only trained service personnel who are familiar with this BenQ Product shall
perform service or maintenance to it. Before performing any maintenance or service,
the engineer MUST read the “Safety Note”.

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2. Introduction
This section contains general service information, please read through carefully. It
should be stored for easy access place for quick reference.
2.1. RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS.
The RoHS (Restriction of Hazardous Substance in Electrical and Electronic Equipment Directive)
is a legal requirement by EU (European Union) for the global electronics industry which sold in
EU and some counties also require this requirement. Any electrical and electronics products
launched in the market after June 2006 should meet this RoHS requirements. Products launched in
the market before June 2006 are not required to compliant with RoHS parts. If the original parts
are not RoHS complaints, the replacement parts can be non ROHS complaints, but if the original
parts are RoHS compliant, the replacement parts MUST be RoHS complaints.
If the product service or maintenance require replacing any parts, please confirming the RoHS
requirement before replace them.
2.2. Safety Notice
1. Make sure your working environment is dry and clean, and meets all government safety
requirements.
2. Ensure that other persons are safe while you are servicing the product.
3. DO NOT perform any action that may cause a hazard to the customer or make the product
unsafe.
4. Use proper safety devices to ensure your personal safety.
5. Always use approved tools and test equipment for servicing.
6. Never assume the product’s power is disconnected from the mains power supply. Check that it
is disconnected before opening the product’s cabinet.
7. Modules containing electrical components are sensitive to electrostatic discharge (ESD).
Follow ESD safety procedures while handling these parts.
8. Some products contain more than one battery. Do not disassemble any battery, or expose it to
high temperatures such as throwing into fire, or it may explode.
9. Refer to government requirements for battery recycling or disposal.
10.
2.3. General Descriptions
This Service Manual contains general information. There are 3 levels of service:
Level 1: Cosmetic / Appearance / Alignment Service
Level 2: Circuit Board or Standard Parts Replacement
Level 3: Component Repair to Circuit Boards
2.4. Related Service Information
BenQ Global Service Website: http://support.benq.com/front/benqmain.asp
eSupport Website: http://bqpgsr.benq.corp.com/customize/asplogin.asp

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3. Product Overview
3.1. Specification
T201W is defined as an entry-level 20 inch wide monitor targeting on both commercial and consumer users
that need an affordable 20” wide monitor. The monitor supports maximum resolution up to 1680x1080 with
analog, digital inputs.
The features summary is shown as below,
*All panel spec. in C201 definition depends on the variance of panel source.
*All spec. of monitor need to warm up at least 1hr.
*All spec. of monitor need to set “Color” on “User preset” mode.
*All spec. of monitor mentioned “Contrast Ratio” the test condition: Set “brightness” at 100, and “contrast” at
80.
*All spec. of monitor mentioned “Luminance” the test condition: Set “brightness” at 100, and “contrast” at 100.
Feature items Specifications Remark
Panel supplier & module name AUO M201SP01 V0 TN
Screen diagonal 20.1” 433.44(H) x 270.90(V)
Display Format 1680 (H) x 1050 (V) Panel Display information
Pixel Pitch 0.258 mm x 0.258 mm per one triad
Viewing Angle (@ Contrast Ratio >= 10)
R+L:160 degrees (typ)
and U+D: 160 degrees (typ)
R/L:140 degrees (min)
and U/D: 140 degrees (min)
Analog interface with Scaling supported Yes With 15-pin D-sub connector
DVI interface with Scaling supported Yes With 24-pin DVI-D connector
Video interface with Scaling supported No
Max resolution mode supported 1680 (H) x 1050 (V)@60Hz
N
umber of Display Colors supported 16.2 millions RGB 6 bits + FRC data
Contrast Ratio 1000:1 (typ.),750:1(min)
Luminance 250 cd/m2(typ.),200 cd/m2(min)
AC power input Yes 90-264 Volts, 47-63 Hz.
DC power input (with AC power adapter) No
DPMS supported Yes <1W
LED indicator for power status showed Yes Green/Amber/Non
OSD for control & information supported Yes
Multi-language supported for OSD Yes 8 languages
Buttons control supported Yes 6 buttons including 1 monitor
power on/off control button.
Flywheel control supported
N
o
Scaling function supported Yes
Auto adjustment function supported Yes “I-Key” function
DDC function supported (EDID ver. 1.3) Yes DDC2B
DDC-CI support version 1.1 or later Yes DDC-CI
Audio speakers supported Yes
Audio Jack (input connector) supported Yes
Earphone Jack (input connector) supported Yes
Microphone function supported
N
o
Mechanical Tilt base design Yes From -2 to +22 degree
VESA wall mounting design Yes
Mechanical Rotate design
N
o
Mechanical Lift base design
N
o

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Kensington compatible lock design Yes
3.1.2. Operational Specification
3.1.2.1 Power supply
Item Condition Spec OK N.A Remark
Input Voltage range Universal input full range 90~264VAC /47~63Hz √
Input Current range 90 ~ 264VAC <2.0 Arms √
Power Consumption Normal “On” operation < =49 W √LED: Green
DPMS DPMS “Off” state < 1 W √LED: Amber
Inrush Current 110 VAC
220 VAC < 30 A (peak) < 60 A (peak) √Cold-start
Earth Leakage Current 264 VAC/50Hz < 3.5 mA √
Hi-Pot 1. 1500VAC, 1 sec
2. Ground test: 30A, 1sec Without damage < 0.1 ohm √(on-line test)
(in-lab test)
Power Line Transient IEC1000-4-4 1KV
√
IEC1000-4-5 (Surge) Common: 2KV,
Differential: 1KV √
CCFL operation range 90 ~ 264VAC 4~8mA √Depends on panel
source
CCFL Frequency 90 ~ 264VAC 40KHz ~ 60KHz √Depends on panel
source
Power cord Color: Black
Length: 1500 +/- 50 mm √
3.1.2.2 Signal interface
Item Condition Spec OK N.A Remark
15-pin D-Sub Color: Black
Length: 1500 +/- 30 mm √
Signal Cable 24-pin DVI-D Color: Black
Length: 2000 +/- 50 mm √
15-pin D-sub connector See Note-1 √For 15-pin D-sub
Pin assignment 24-pin DVI-D connector See Note-2 √For 24-pin DVI-D
Signal type Separate analog R/G/B √For 15-pin D-sub
Level 700 mV (peak to peak) √Video input
Impedance 75 Ohms +/- 1.5 Ohms √
Signal type Separate H/V-sync Composite H/V-sync
(Positive/Negative) √For 15-pin D-sub
Level Logic High: 2.4V ~ 5.5V Logic Low: 0V ~ 0.5V
(TTL level) √Refer to VESA VSIS
Standard V1R1
Impedance Minimum 2.2KΩ(pull down) √10KΩfor application
Sync input
Sync Pulse Width (SPW) 0.7μs < H-SPW
1H < V-SPW √

Note-1: The pin assignment of 15-pin D-sub connector is as below,
Pin Signal Assignment Pin Signal Assignment
1 Red video 9 PC5V (+5 volt power)
2 Green video 10 Sync Ground
3 Blue video 11 Ground
4 Ground 12 SDA
5 Cable Detected 13 H-Sync (or H+V)
6 Red Ground 14 V-sync
7 Green Ground 15 SCL
8 Blue Ground
Note-2: The pin assignment of 24-pin DVI-D connector is as below,
Pin Signal Assignment Pin Signal Assignment
1 TMDS RX2- 13 Floating
2 TMDS RX2+ 14 +5V Power
3 TMDS Ground 15 Ground
4 Floating 16 Hot Plug Detect
5 Floating 17 TMDS RX0-
6 DDC Clock 18 TMDS RX0+
7 DDC Data 19 TMDS Ground
8 Floating 20 Floating
9 TMDS RX1- 21 Floating
10 TMDS RX1+ 22 TMDS Ground
11 TMDS Ground 23 TMDS Clock+
12 Floating 24 TMDS Clock-
3.1.2.3 Video performance
Item Condition Spec OK N.A Remark
Max. support Pixel rate 165 MHz √
Max. Resolution 1680 x 1050 √
Rise time + Fall time < 3.1 ns
(50% of minimum pixel
clock period) √1680 x 1050 @ 60Hz
(max. support timing)
Settling Time after
overshoot /undershoot < 5% final full-scale value √Refer to VESA VSIS
Standard V1R1
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Overshoot/Undershoot < 12% of step function
voltage level over the full
voltage range √Refer to VESA VSIS
Standard V1R1
f
3.1.2.4 Scan range
Item Condition Spec OK N.A Remark
Horizontal 30-82 KHz √
Vertical 56-76 Hz √
3.1.2.5 Plug & Play DDC2B DDC-CISupport
Item Condition Spec OK N.A Remark
DDC channel type DDC2B √
EDID
Version 1.3 √Refer to FP92E S/W
spec. document to see
the detailed EDID data
definition.
DDC-CI Version 1.1 or Later √Refer to FP202 S/W
spec
3.1.2.6 Support Timings
Input Timing Actual Output
Resolution Horizontal Vertical Dot Clock Actual display OK N.A Remark
6
40 x 480 31.47(N) 60.00(N) 25.175 1680x1050
√VGA
6
40 x 480 37.50(N) 75.00(N) 31.50 1680x1050
√VGA
7
20 x 400 31.47(N) 70.08(P) 28.321 1680x1050
VGA
8
00 x 600 37.88(P) 60.32(P) 40.00 1680x1050
√VESA
8
00 x 600 46.88(P) 75.00(P) 49.50 1680x1050 √VESA
8
32 x 624 49.72 74.55 57.283
1680x1050 √MAC
1
024 x 768 48.36(N) 60.00(N) 65.00 1680x1050 √VESA
1
024 x 768 60.02(N) 75.03(N) 78.75 1680x1050 √VESA
1
152 x 720 44.86(N) 60.00(P) 66.75 1680x1050 √
C
VT 0.83MA
DVT 16:10
1
152 x 870 68.68 75.06 100.00
1680x1050 √MAC
1
152 x 900 61.80 65.96 92.978
1680x1050 √SUN

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1
280 x 768 47.396(P) 60.0(N) 68.25 1680x1050 √CVT
0.98M9-R
1
280 x 960 60.00 60.00 108.00
1680x1050 √VESA
1
280 x 1024 63.98(P) 60.00(P) 108.00 1680x1050 √VESA
1
280 x 1024 79.98(P) 75.02(P) 135.00 1680x1050 √VESA
1
440 x 900 55.94(N) 59.89(P) 106.50 1680x1050 √CVT
1.30MA
1
600 x 1000 61.648(P) 60.00(N) 108.50 1680x1050 √CVT
1.60MA-R
1
600 x 1200 75.00(P) 60.00(P) 162.00 1680x1050 √VESA
1
680 x 1050 65.29(N) 60.00(P) 146.25 1680x1050 √CVT
1.76MA
Note-3: “P”, “N” stands for “Positive”, “Negative” polarity of incoming H-sync/V-sync (input timing).
3.1.3. Operational & Functional Specification
3.1.3.1 Video performance
*All spec. of monitor need to warm up at least 1hr.
Item Condition Spec OK N.A Remark
Resolution Any input resolution modes
which are under 1680x1050 1680x1050 √
Contrast ratio 1000:1 (typ.),700:1(min)
√
Brightness At R/G/B saturated condition 250 cd/m2(typ.),200(min) √
Response time Rising + Falling time 5 ms (typ.),7ms(max) √
Test Equipment:
Westar TRD 100
or equal level
equipment ;
At Contrast ratio = 10 R/L: 80/80 degrees (typ.) √
Viewing angle At Contrast ratio = 10 U/D: 80/80 degrees (typ.) √
CIE coordinate of White (0.313, 0.329) ±(0.03, 0.03) √
Display colors 16.2 Millions colors √6 bit + FRC
3.1.3.2 Brightness Adjustable Range

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Item Condition Spec OK N.A Remark
Brightness adjustable range At default contrast level
(saturate point) & Full-white
color pattern
(Max. brightness value –
Min. brightness value)
≧100 cd/㎡√
3.1.3.3 Acoustical Noise
Item Condition Spec OK N.A Remark
Acoustical Noise At 1 meter distance
& “Audio” function disabled ≦30 dB/A √
3.1.3.4 Environment
Item Condition Spec OK N.A Remark
Operating 0 ~ +40 ℃√
Temperature Non-operating -20 ~ +60 ℃√
Operating 10 ~ 90% √Non-condensing
Humidity Non-operating 10 ~ 90% √Non-condensing
Operating 0~3048m (10,000ft)
√Without packing
Altitude Non-operating 0~12,192m (40,000ft)
√With packing
3.1.3.5 Transportation
Item Condition Spec OK N.A Remark
(1) Sine wave
5~200Hz 1.5G, 1 octave/min,
15 min dwell on each resonant
frequency, all primary axis,
one sweep (30 min minimum)
p
er orientation, total of 90+
min.
(1) Vibration
Package, Non-Operating
(2) Random
5 ~100 Hz, 0 dB/Oct. 0.015
g2/Hz
100 ~200 Hz, -6 dB/Oct.
200 Hz, 0.0038 g2/Hz
Equivalent to 1.47 Grms, All
primary axis, 20 min per-
orientation, total is 60 min.
√

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(3) Procedure:
Confirmed sample with
appearance and function ready
before testing then compare
with after test record as
brightness, uniformity and
contrast ratio. Perform
random vibration after sine-
wave vibration test.
(2) Unpackaged Vibration Unpackaged, Non-Operating
Test Spectrum:
20 Hz 0.0185(g2/Hz)
200Hz 0.0185(g2/Hz)
Duration : 5 Minutes
Axis : 3 axis ( Horizontal
and Vertical axis ,Z axis)
√
(3) Drop Package, Non-Operating 91 cm Height (MP stage)
(1 corner, 3 edges, 6 faces) √
(4) Shock Wooden package, Non-
Operating
Waveform: half sine
Faces: 6 sides/ per orientation
3 shocks.
Duration: <3ms
Velocity accelerate: 75g
√
3.1.3.6 Electrostatic Discharge Requirements
Item Condition Spec OK N.A Remark
Electrostatic Discharge IEC801-2 standard Contact: 12KV
Air: 15KV √
3.1.3.7 EMC
Item Condition Spec OK N.A Remark
Electric Band 1 < 10 V/m
Band 2 < 1 V/m √
TCO03 Magnetic Band 1 < 200nT
Band 2 < 25nT √
FCC part 15J class B
EMI EN55022 class B
After Mass production under
1dBuv for constant measure.
Besides DNSF and VCCI
class-2 are optional.
√
3.1.3.8 Reliability
Item Condition Spec OK N.A Remark
MTBF Prediction Refer to MIL-217F > 50,000 Hours √Excluding CCFL
CCFL Life time At 25±2℃, under 6.0mA 40,000 Hours (min) √See Note-4
Note-4: CCFL lifetime is determined as the time at which brightness of lamp is 50%. The typical lifetime
of CCFL is on the condition at 6.0mA lamp current.

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3.1.3.9 Audio performance
Item Condition Spec OK N.A Remark
Preamp + Power amp
(1)Output power @ 1KHz 1 Wrms/CH √
(2)THD (@ 1W) @ 1W 1KHz <1% √
(3)S/N ratio >40dB √
Speaker Driver
(1)Nominal impedance @ 1KHz 8 ± 15% ohm √
(2)Rated input power 1 W/CH √
(3)Frequency response SPL-10dB 500~20KHz √
(4)Output sound pressure level 1W 0.5M 80 ± 3 dB √
(5)Dimension of box 35x16mm2√
Audio Control
(1)Volume range 0 ~100 levels √
(2)Mute On/Off √

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3.1.4. LCD Characteristics
3.1.4.1 The Physical definition & Technology summary of LCD panel
Item Condition Spec OK N.ARemark
LCD Panel Supplier AUO √
Panel type of Supplier AUO M201SP01 V0 √
Screen Diagonal 511.13mm(20”) √
Display area Unit=mm 433.44(H) x 270.90(V) √
Physical Size Unit=mm 459.4(H) x296.4(V) x 18.3(D) √
Weight Unit=gram 2100(typ.) √
Technology TN type √
Pixel pitch Unit=mm 0.258(H) x 0.258(W) √Per one triad
Pixel arrangement R/G/B vertical stripe √
Display mode Normally White √
Support color 16.2 Millions colors √6 bit + FRC
3.1.4.2 Optical characteristics of LCD panel
Item Unit Conditions Min. Typ. Max. Remark
[degree]
[degree] Horizontal (Right) CR = 10 (Left) 70 70 80 80 - -
Viewing Angle [degree]
[degree] Vertical (Up) CR = 10 (Down) 70 70 80 80 - -
Contrast ratio Normal Direction
700 1000
[msec] Rising Time - 3.6 5.7
[msec] Falling Time - 1.4 2.3Response Time [msec] Rising + Falling - 5 8
Red x 0.61 0.64 0.67
Red y 0.31 0.32 0.37
Green x 0.26 0.29 0.32
Green y 0.58 0.61 0.64
Blue x 0.11 0.14 0.17
Color / Chromaticity
Coordinates (CIE)
Blue y 0.04 0.07 0.10
White x 0.28 0.31 0.34
Color Coordinates (CIE) White White y 0.30 0.33 0.36
Luminance Uniformity [%] 9 points measurement 75 80
White Luminance @ CCFL
6.0mA (center) [cd/m2]
200 250 -
Crosstalk (in 75Hz) [%] 1.5
* The test methods for the above items’ definition, please refer to the relative panel specification.

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3.1.5. User Controls
3.1.5.1 User’s hardware control definition
Item Condition Spec OK N.ARemark
Power button √
Enter button √
Up/Inc. button √
Down/Dec. button √
Exit button √
Mode button √
Input Select button √
iKey button √
Mute button √
3.1.5.2 OSD control function definition
Item Condition Spec OK N.ARemark
Auto Adjust Auto-Geometry √
Brightness √
Contrast √
Horizontal Position √
Vertical Position √
Pixel Clock √
Phase √
Color
9300K
7500K
6500K
User: Separate R/G/B adjustment
√
OSD Position OSD Horizontal position
OSD Vertical position √
OSD Time From 5 sec to 30 sec √
OSD Lock √
Language 8 languages √
Recall Recall All √
Mode Standard / Movie / Dynamic /
Photo √√
Input Select D-sub
DVI √
Sharpness √
Display Information For input timing √
Volume √
Mute √
Hot key for Brightness √

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Hot key for Contrast √
Hot key for Volume √
Hot key for Input Select √
Hot key for Mode √
* The detailed firmware functions’ specification, please refer to C212 S/W spec. document.
3.1.6. Mechanical Characteristics
3.1.6.1 Dimension
Item Condition Spec OK N.ARemark
Bezel opening 435.94*273.4 mm √
Monitor without Stand W x H x D mm 479.66*337.84*58mm √
Monitor with Stand W x H x D mm 479.66*400.42*186.9mm √
Carton Box (outside) L x W x H mm 567*493*131 √
Tilt and Swivel range Tilt: -2 ~ +22 degree
Swivel: 0 degree √
3.1.6.2 Weight
Item Condition Spec OK N.ARemark
Monitor (Net) 4.34Kg √
Monitor with packing (Gross) 6.15 Kg √
3.1.6.3 Plastic
Item Condition Spec OK N.ARemark
Flammability >ABS<,94-HB √
Heat deflection To ABS 65 ℃√
UV stability ABS Delta E < 8.0 √
Resin MPRII: ABS
(
SD0150/GP35/D350/PA757) √
Texture MT-11010 √RC partial texture
MT-11020
Color Y7054A √

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3.1.6.4 Carton
Item Condition Spec OK N.ARemark
Color Kraft √
Material A Flute √
Compression strength 416 KGF √
Burst Strength 16 KGF/cm2√
Stacked quantity 16 Layers √
3.1.7. Pallet & Shipment
3.1.7.1 Container Specification
Stowing Type ine
r
Quantity of products
(sets)
(Every container)
Quantity of Products
(sets)
(Every Pallet)
Quantity of pallet
(sets)
(Every Container)
20' 736 Pallet A: 64 Pallet A: 10
Pallet B: 48 Pallet B: 2
40' 1536 Pallet A: 64 Pallet A: 24
With pallet
Pallet B: Pallet B:
20' X X
X X
40' X X
Without pallet
X X
3.1.7.2 Carton Specification
3.1..7.2.1Product:
Net Weight (Kg) Gross Weight (Kg) Dimension w/o Base
W*H*D (mm) Dimension w/ Base W*H*D (mm)
4.34Kg 6.15 Kg 479.66*337.84*58mm 479.66*400.42*186.9mm
3.1..7.2.2Package:
Carton Interior Dimension (mm) Carton External Dimension (mm)

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L*W*H L*W*H
555*478*111 567*493*131
3.1.8. Certification
Item Condition Spec OK N.A Remark
Green design API Doc. 715-C49 √ISO14000
Requirement
Blue Angel German Standard √
E-2000 Switzerland
√
EPA USA Standard
√
TCO’99 √
TCO’03 √
Environment
Green Mark √
Microsoft Windows PC98/99 √
DPMS VESA √
DDC 2B Version 1.3 √
PC-Monitor
USB External
√
UL (USA) UL60950 3rd edition √
CSA (Canada) CAN/CSA-C22.2 No. 60950 √
Nordic / D.N.S.F EN60950 √
FIMKO EN60950 √
CE Mark 73/23/EEC √
CB IEC60950 √
CB EN60950 √
TUV/GS EN60950 /
EK1-ITB 2000:2003
√
CCC (China) CB4943 √
GOST EN60950
√
Safety
SASO IEC60950
√
CE Mark 89/336/EEC √
FCC (USA) FCC Part 15 B √
EN55022 Class B √
CISPR 22 Class B √
VCCI (Japan) VCCI Class B √
BSMI (Taiwan) CNS 13438 √
EMC
C-Tick (Australia) AS/ NZS CISPR22 √
X- Ray Requirement DHHS (21 CFR) USA X- Ray Standard √

DNHW √
PTB German X- Ray standard √
TUV / Ergo √
ISO 13406-2 √
Ergonomics
prEN50279 √
Appendix: Physical Dimension Front View and Side view
Fig. 1 Physical Dimension Front View and Side view
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- 19 -
3.2. Customer Acceptance
3.2.1. SCOPE
This document establishes the general workmanship standards and functionalAcceptance criteria
for LCD color monitor model T201W Produced by BenQ Corporation.
3.2.2. PURPOSE
The purpose of this publication is to define a procedure for inspection of the LCD monitor by
means of a customer acceptance test, the method of evaluation of defects and rules for specifying
acceptance levels.
3.2.3. APPLICATION
The "Customer Acceptance Criteria" is applicable to the inspection of the LCD monitor, completely
packed and ready for dispatch to customers. Unless otherwise specified, the customer acceptance
inspection should be conducted at manufacturer's site.
3.2.4. DEFINITION
The "Customer Acceptance Criteria" is the document defining the process of examining, testing
or otherwise comparing the product with a given set of specified technical, esthetic and workmanship
requirements leading to an evaluation of the "degree of fitness for use", including possible personal
injury or property damage for the user of the product.
3.2.5. CLASSIFICATION OF DEFECTS
The defects are grouped into the following classes:
Critical defect
A critical defect is a defect that judgment and experience indicate is likely to result in hazardous or unsafe
conditions for individuals using, maintaining or depending upon the product.
Major defect
A major defect is a defect, other than critical, that is likely to result in failure, or to reduce materially the
usability of the product for its intended purpose.
Minor defect
A minor defect is a defect that is not likely to reduce materially the usability of the product for its intended
purpose, or is a departure from established standards having little bearing on the effective use of
operation of the product.
3.2.6. CLASSIFICATION OF DEFECTIVES
A defective is a product which contains one or more defects. The defective will be classified into following
classes:
Critical defective
A critical defective contains one or more critical and may also contain major and/or minor defects.
Major defective
A major defective contains one or more defects and may also contain minor defects but contains no
critical defect.
Minor defective
A minor defective contains one or more minor defects but contains no critical and major defects.
3.2.7. EXPRESSION OF DEFECTIVES

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Number of defects
Percent of defects = ------------------------------------------ X 100%
Number of products inspected
3.2.8. INSPECTION STANDARD
Unless otherwise specified, the inspection standard will be defined by MIL- STD-105E(ISO-2859),
SINGLE SAMPLING PLAN. level II is in use all the time , inspection levels are normal ,reduce and
tighten .
Acceptance Quality Level
When a critical defect is found, this must be reported immediately upon detection, the lot or batch
shall be rejected and further shipments shall be held up pending instructions from the responsible
person in relevant organization.
Major Defective: 0.4 AQL
Minor Defective: 1.50 AQL
3.2.9. GENERAL RULES
The inspection must be carried out by trained inspectors having good knowledge of the meaning of
"fitness for use". The inspection must be based upon the documents concerning the completely
assembled and packed product When more defects appear with the same cause only the most serious
defect must be taken into account. Defects found in accessories packed with the product as connecting
cables, plugs, adapters and the like, and being inspected as a part of the complete product, must be
included in the evaluation.
The evaluation must be within the limits of the product specification and, for not specified characteristics,
be related to the design model, limit samples or judgment of a jury of experts.
Faults must be demonstrable.
3.2.10. TEST CONDITIONS
Unless otherwise prescribed, the test conditions are as follows:
. Nominal mains voltage
Temperature: +5~+35℃
. Warm up time : 30minutes minimum .
. Visual inspection shall be down with the distance from eyes to the sample 35-50 cm .
. Display mode: Primary mode 1280*1024
3.2.11. TEST EQUIPMENTS
1. PC with display adapter or other specific
display adapter which is agreed upon by both parties
2. Test program by BenQ
3. Ruler
4. Power saving test tool
5. Minolta color analyzer ( CA-110 or BM – 7 )
3.2.12. VISUAL INSPECTION CRITERIA
1. PACKING
2. ACCESSORIES
3. APPEARANCE