BenQ M2700HD User manual

Product Service Manual--Level 1
Service Manual for BenQ:
M2700HD
Applicable for All Regions
Version: 001
Date:2009/11/27
Notice:
- For RO to input specific “Legal Requirement” in specific NS regarding to responsibilit
y
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 (November, 2009)
© Copyright BenQ Corporation 2009. All Right Reserved.

BenQ M2700HD Service Manual
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Content Index
1. About This Manual............................................................................................................................................2
1.1 Trademark......................................................................................................................................................... 2
2. Precautions & Safety Notices..........................................................................................................................2
2.1 Safety Precaution ............................................................................................................................................. 2
2.2 Product Safety Notice ....................................................................................................................................... 2
2.3 Service Notes ................................................................................................................................................... 2
3. Product Overview.............................................................................................................................................3
3.1 Power Supply.................................................................................................................................................... 3
3.2 Signal Interface................................................................................................................................................. 3
3.3 Scan Range ...................................................................................................................................................... 4
3.4 Support Timings................................................................................................................................................ 4
3.5 Operational & Function Specification................................................................................................................ 6
3.6 LCD Characteristics.......................................................................................................................................... 8
3.7 User Controls.................................................................................................................................................... 9
3.8 Mechanical Characteristics............................................................................................................................... 9
3.9 Pallet & Shipment ............................................................................................................錯誤! 尚未定義書籤。
4 Level 1 Cosmetic / Appearance / Alignment Service....................................................錯誤! 尚未定義書籤。
4.1 Software / Firmware Upgrade Process............................................................................錯誤! 尚未定義書籤。
4.2 Alignment Procedure (for function adjustment) ...............................................................錯誤! 尚未定義書籤。
5. Level 2 Disassembly/Assembly/Circuit Board/Standard Parts Replacement ...........錯誤! 尚未定義書籤。
5.1 Exploded Diagram ...........................................................................................................錯誤! 尚未定義書籤。
5.2 Assembly Block................................................................................................................錯誤! 尚未定義書籤。
5.3 Disassembly Block...........................................................................................................錯誤! 尚未定義書籤。
5.4 Block Diagram ................................................................................................................................................ 11
5.5 Circuit Operation Theory................................................................................................................................. 44
5.6 I/F Circuit ........................................................................................................................................................ 44
5.7 Trouble Shooting Guide.................................................................................................................................. 47

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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”
2. Precautions & Safety Notices
2.1 Safety Precaution
This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However,
improper used or installation may cause damage to the monitor as well as to the user.
WARNINGS:
zThis monitor should be operated only at the correct power sources indicated on the label on the rear of
the monitor. If you’re unsure of the power supply in you residence, consult your local dealer or Power
Company.
zDo not try to repair the monitor by yourself, as it contains no user-serviceable parts. This monitor should
only be repaired by a qualified technician.
zDo not remove the monitor cabinet. There is high-voltage parts inside that may cause electric shock to
human bodies.
zStop using the monitor if the cabinet is damaged. Have it checked by a service technician.
zPut your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable immediately
and consult your closed dealer.
zAlways unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth. Apply
non-ammonia based cleaner onto the cloth, not directly onto the class screen.
zDo not place heavy objects on the monitor or power cord.
2.2 Product Safety Notice
Many electrical and mechanical parts in this chassis have special safety visual inspections and the
protection afforded by them cannot necessarily be obtained by using replacement components rated for
higher voltage, wattage, etc. Before replacing any of these components read the parts list in this manual
carefully. The use of substitute replacement parts, which do not have the same safety characteristics as
specified in the parts list, may create shock, fire, or other hazards.
2.3 Service Notes
zWhen replacing parts or circuit boards, clamp the lead wires around terminals before soldering.
zKeep wires away from high voltage, high temperature components and sharp edges.
zKeep wires in their original position so as to reduce interference.
zAdjustment of this product please refers to the user’ manual.

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3. Product Overview
3.1 Power Supply
Items Condition Spec Note
AC Input Voltage range Universal input full range 90~264Vac
AC Input Voltage rating Universal input full range 100~240Vac
AC input frequency range 90~264Vac 47~63Hz
AC input frequency rating 100~240Vac 50~60Hz
AC Input Current 100Vac 1.5A(max)
240Vac 0.8A(max)
Inrush Current 100Vac,cold star,25°C 40A (max) See Note2
240Vac,cold star,25°C 60A(max)
Power Factor 240V Input Full Load >80%
AC-DC power Efficiency DC output full loading ≥75%
Note2. Before each test, the buck capacitor need to be discharged.
Before each test, it must be 10 minutes at least after the latest test.
Hotstarnotcomponentbedamaged.
3.2 Signal Interface
Input Connector Analog : D-sub 15
Digital: DVI-D&HDMI＊2
S-Video
Component
Compsite
PC Audio
RCA Audio
USB : 4Port
Default Input Connector Defaults to the first detected input
Video Cable Strain Relief Equal to twice the weight of the monitor for five
minutes
Video Cable Connector DB-15 Pin out Compliant DDC 2B / CI
Video Signals
1. Video RGB (Analog): Separate
2. DVI (Digital)
3.HDMI(Digital)
4.S-Video
5.Component
6.Compsite
Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)
Maximum PC Video Signal 950 mV with no damage to monitor
Maximum Mac Video Signal 1250 mV with no damage to monitor
Sync Signals TTL
DDC 1/2B Compliant with Revision 1.3
Sync Compatibility Separate Sync/Composite Sync/Sync on Green
/HDMI
Video Compatibility Shall be compatible with all PC type computers,
Macintosh computers, and after market video cards

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3.3 Scan Range
Item condition Spec OK NA Remark
Horizontal Sync polarity: (+) or (-) 24~83 KHz
√
Vertical
Sync polarity: (+) or (-) 50~76Hz
√
3.4 Support Timings
BenQ customer preset Tmings are as below:
P: Preset Mode
NP: Non Preset Mode
FS: Fail Save Mode(show “Out of Range”, but still can see picture)
O: Out of Range(only show “Out of Range”, without picture )
27W Resolution Pixel clock H-sync V-sync H-Pol V-Pol
1920x1080 (unit:MHz) (unit:KHz) (unit:Hz)
P 640x350 25.18 31.47 70.09 P N
O 640x350 31.50 37.86 85.08 P N
NP 640x400 25.18 31.47 70.09 N P
FS 640x400 31.5 37.86 85.08 N P
NP 640x480 30.24 35.00 66.67 N N
P 640x480 25.17 31.47 59.94 N N
NP 640x480 31.50 37.86 72.81 N N
P 640x480 31.50 37.50 75.00 N N
FS 640x480 36.00 43.27 85.01 N N
NP 640x500 25.25 31.00 57.76 N N
P 720x400 28.32 31.47 70.08 N P
FS 720x400 35.5 37.93 85.04 N P
P 832x624 57.27 49.71 74.53 N N
NP 800x480 29.5 29.74 59.476 N P
NP 800x600 36.00 35.16 56.25 P P
P 800x600 40.00 37.88 60.32 P P
NP 800x600 50.00 48.08 72.19 P P
P 800x600 49.50 46.88 75.00 P P
FS 800x600 56.25 53.67 85.06 P P
NP 848x480 33.75 31.02 60.00 P P
NP 848x480 31.50 29.83 59.66 N P
NP 848x480 37.52 35.00 70.00 N P
NP 848x480 39.25 36.07 72.00 N P
NP 848x480 41.00 37.68 74.77 N P
NP 720x576 32.71 35.910 59.950 N P
P 1024x576 46.966 35.82 60 N P
P 1024x600 48.964 37.32 60 N P
FS 1024x768-I 44.9 35.52 43.48 P P
P 1024x768 65.00 48.36 60.00 N N
NP 1024x768 75.00 56.48 70.07 N N
NP 1024x768 78.43 57.67 72.00 N P
P 1024x768 80.00 60.24 74.93 N N

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P 1024x768 78.75 60.02 75.03 P P
FS 1024x768 94.50 68.68 85.00 P P
P 1152x720 66.75 44.86 60 N P
NP 1152x864 94.50 63.85 70.01 P P
P 1152x864 108.00 67.50 75.00 P P
FS 1152x864 119.651 77.09 85.00 N P
P 1152x870 100.00 68.68 75.06 N N
P 1152x900 92.94 61.80 65.95 N N
NP 1152x900 105.59 71.73 76.07 N N
P 1280x720 74.25 45.00 59.94 N P
P 1280x720 74.50 44.77 59.86 N P
P 1280x720 95.75 56.46 74.78 N P
P 1280x768-R 68.25 47.40 60.00 P N
NP 1280x768 79.50 47.78 59.87 N P
NP 1280x768 102.25 60.29 74.89 N P
FS 1280x768 117.50 68.63 84.84 N P
NP 1280x800 71 49.31 59.91 P P
P 1280x800 83.50 49.702 59.81 N P
NP 1280x800 98.894 58.3 70 N P
NP 1280x800 102.8 60.048 72 N P
P 1280x800 106.6 62.795 74.934 N P
FS 1280x800 122.5 71.55 84.88 N P
P 1280x960 108.00 60.00 60.00 P P
FS 1280x960 148.50 85.94 85.00 P P
P 1280x1024 108.00 63.98 60.02 P P
NP 1280x1024 126.99 74.88 69.85 P P
NP 1280x1024 124.90 74.40 70.00 N N
NP 1280x1024 134.60 77.90 72.00 P P
P 1280x1024 135.00 79.98 75.02 P P
NP 1280x1024 135.09 81.18 76.16 N N
FS 1280x1024 157.50 91.15 85.02 P P
P 1360x768 85.50 47.71 60.01 P P
P 1366x768 85.50 47.71 59.79 P P
NP 1400x1050-R 101.00 64.74 59.95 P N
NP 1400x1050 121.75 65.32 59.98 N P
NP 1400x1050 156.00 82.28 74.87 N P
FS 1400x1050 179.50 93.88 84.96 N P
P 1440x900-R 88.75 55.496 59.901 P N
P 1440x900 106.5 55.935 59.887 N P
P 1440x900 136.75 70.6 75 N P
P 1600X900-R 97.75 55.54 59.98 P N
P 1600x1000-R 108.5 61.648 59.910 P N
NP 1600x1000 132.25 62.14 59.87 N P
NP 1600x1000 169.25 78.356 74.83 N P
NP 1600x1200-R 130.25 74.01 59.92 P N
P 1600x1200 162.00 75.00 60.00 P P
NP 1600x1200 175.50 81.25 65.00 P P
NP 1600x1200 189.00 87.50 70.00 P P

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NP 1600x1200 202.50 93.75 75.00 P P
O 1600x1200 229.50 106.25 85.00 P P
NP 1680x1050-R 119.00 64.67 59.88 P N
P 1680x1050 146.25 65.29 59.95 N P
P 1680x1050 187 82.306 75 N P
NP 1600x1280 171.75 79.5 59.9 N P
FS 1792X1344 203.25 83.57 59.9 N P
O 1792X1344 257.75 105.290 75.00 N P
O 1856X1392 217.25 86.485 59.934 N P
O 1856X1392 277.5 109 74.918 N P
O 1800x1440 218.25 89.4 59.9 N P
P 1920x1080-R 138.5 66.587 59.934 P N
P 1920x1080 173 67.158 59.963 N P
P 1920x1080 148.5 67.5 60 P P
FS 1920X1200-R5 127.750 61.418 49.974 P N
FS 1920X1200-R 154.00 74.04 59.95 P N
FS 1920X1200 193.25 74.56 59.89 N P
O 1920X1200 245.25 94.04 74.93 N P
FS 1920X1440-R 184.75 88.822 59.9 P N
O 1920X1440 233.500 89.532 59.968 N P
O 1920X1440 298 112.50 74.9 N P
FS 2048x1152-R 156.75 70.992 59.9 P N
FS 2048x1152 197 71.584 59.9 N P
O 2048x1536-R 209.25 94.7 59.9 P N
O 2048x1536 267.25 95.4 59.9 N P
O 2560x1600-R 268.5 98.713 59.972 P N
O 2560x1600 348.5 99.4 59.9 N P
3.5 Operational & Function Specification
3.5.1 Video Performance
* All Spec. of monitor need to warm up at lease 1hr
Features Specifications
Maximum resolution 1920x1080 @ 60Hz
Back light system 4 CCFL
Actual Resolution display WUXGA (1920x1080)
Pixel pitch 311.25(H) x 311.25(V)
Display area 597.6(H) x 336.15(V)
Contrast ratio/ For AUO Panel: 600׃1 (min.), 1000׃1 (Typ.)
Dynamic contrats ratio(typ) DCR : 50000:1(typ)

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Brightness 240 nits (min) 300 nits (Typ)---For AUO Panel
Response time (Tr +Tf ) AUO Panel: 5ms (Typ.) 8ms (Max.)
OD: 2ms
NTSC ratio 72%
Viewing angle (H/V) Hor:170°,Ver:160° (Typ.,CR≥10)--For AUO
Input interface
Analog (D-sub 15 pin);DVI-D;HDMI＊
2,S-Video,Component,Composite
Power management Compatible with Energy Star, DPMS
Plug & Play VESA DDC2B / CI
University AC power supply 100V – 240VAC, 50Hz – 60Hz
OSD language
17 Languages (English / Francais / Deutsch / Italiano / Espanol /
Polish / Czech / Hungarian / Serbo-croatian / Romanian / Netherlands
/
Russian / Swedish / Protuguese / Japanese / Chinese / S-Chinese)
3.5.2 Brightness Adjustable Range
The test to verify specifications in this section shall be performed under the following standard
conditions unless otherwise noted.
Temperature : 25 ± 5°C
Test pattern : white
Video Resolution : 1920x1080@60HZ
Video input level : 700 mV ± 2%
Warm-up time : 30 minutes
Warm-up time : 30
minutesItem Condition SPEC
Luminance Range
Brightness=0%
NA
Contrast = 0%
Brightness=100%
≥250 cd/m2
Contrast = 100%
Brightness=90%
NA
Contrast = 50%
3.5.3 Acoustical Noise
Item condition Spec OK NA Remark
Acoustical Noise
At 1 meter
distance& audio
function disable
≦28dB/A √

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3.5.4 Environment
Operating Specification
Temperature range 0°C to 50°C
Relative humidity 5% to 90%
Altitude 0 to 10000 feet
Storage
Temperature range -20°C to 60°C
Relative humidity 5% to 90%
Altitude 0 to 30000 feet
3.5.6 Electrostatic discharge Requirements
Item Condition Spec Remark
Electrostatic
Discharge BenQ SPEC
Contact discharge : 4KV VGA cable pin
need test 8KV, DVI
cable pin need test
4KV
Contact discharge : 8KV ●
Air discharge : 8KV
Air discharge : 15KV ●
3.5.7 Reliability
Items Condition Spec Note
MTBF 90% Confidence ≧50,000 Hours Excludin
g Panel
CCFL Life time Luminance becomes 50% AUO M270HW01 V0: 50,000
Hours(TYP.) Note1
Note1. More details of CCFL life time please refer to Panel SPEC.
3.6 LCD Characteristics
3.6.1 The physical definition &technology summary of LCD panel
Supplier AUO
Model name AUO M270HW01 V0:
Display Area 597.6(H)x336.15(V)
Pixel Pitch 311.25(H)x311.25(V)
Display Colors 16.7M(6 Bit+Hi-FRC)
Number of Pixel 1,920(H) X 1,080(V),
Brightness Min: 240cd/m
2
; Typical: 300cd/m
2
2
2
Contrast Ratio Min: 600:1
Viewing Angle Hor: 170°, Ver: 160° (Typical, CR=10)
Display Mode Normally White
Frame rate 50~75Hz
Response Time Typical: 5ms; Max: 8ms
Surface
Treatment Anti-glare, 3H
Lamp 4 CCFL
Outline
Dimension 630 (W) X 368.2 (H) X 15.9 (D) (typ.)
Brightness
uniformity Min: 75%; Typical: 80% / 9 points.

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3.7 User Controls
User’s hardware control definition:
CONTROL KEY KEYS FUNCTION
[MENU]
A. When OSD displays, press [MENU] to return to previous level menu
B. When OSD isn’t shown on screen, press [MENU] to enter OSD interface
C. Press [MENU] to enter Service Page When OSD isn’t shown on screen in Service
Page Mode
[Enter]
A. When OSD displays, press [Enter] to perform function of menu icon that is
highlight or enter next level menu
B. When OSD isn’t shown on screen, press[Enter] to change input source
[▲], [▼]
A. When “MENU OSD” displays, press these keys to change the contents of an
adjustment item, or change an adjustment value
B. When “MENU OSD” un-displays, press [▲] to show Volume Menu
press[▼] to Show Picture Mode Menu.
C. Press [▲] for 3 sec. will display the “mute “ message for 3 sec. when
audio at mute status, press the [▲]for 3 sec again, will release Audio
Mute
D. Press [▲]to show Volume Hot Key Menu, this Menu elapsed time depend on the
Display Time of OSD
[POWER] Power on or power off the monitor
[Auto] press [Auto] to perform auto-adjustment
3.8 Mechanical Characteristics
3.8.1Dimension
Item condition Spec OK NA Remark
Bezel opening Lx W 599.652x338.202mm √
Monitor without stand L×W×H mm 657.91*463.66*64.91mm √
Monitor with stand L×W×H mm 657.91*463.66*241.92mm √
Carton Box(outside) L×W×H mm 774x592x310mm √
Tilt and Swivel range Tilt:-5~20degree
Swivel: 0 degree
√
3.8.2 Weight
Dimension (Monitor with Stand) Spec
Width 657.91mm
Height 463.66mm
Depth 241.92mm
Monitor Weight
9.4±0.5 Kg ( Net )
13.4±0.5Kg( Gross / with packing)
3.8.3 Plastic
Item condition Spec OK NA Remark
Flammability 94-HB √
Heat deflection to 80°C √
UV stability Delta E<12 √
resin ABS+PMMA
√