BenQ G2220HD - 21.5" LCD Monitor User manual

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Product Service Manual
Service Manual for BenQ:
G2220HD&G2220HDA
P/N: 9H.L07LN.IXX
Applicable for All Regions
Version: 001
Date:2009/12/18
Notice:
- For RO to input specific “Legal Requirement” in specific NS regarding to responsibility and liability 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 (July, 2008)
© Copyright BenQ Corporation 2008. All Right Reserved.

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Content Index
1. About This Manual............................................................................................................... 3
1.1 Trademark ...................................................................................................................... 3
2. Precautions & Safety Notices .............................................................................................. 4
2.1 Safety Precaution ...........................................................................................................4
2.2 Product Safety Notice..................................................................................................... 4
2.3 Service Notes ................................................................................................................. 4
3. Product Overview ................................................................................................................ 5
3.1 Power Supply ................................................................................................................. 5
3.2 Signal Interface............................................................................................................... 5
3.3 Scan Range.................................................................................................................... 5
3.4 Support Timings.............................................................................................................. 6
3.5 Operational & Function Specification.............................................................................. 7
3.6 LCD Characteristics...................................................................................................... 10
3.7 User Controls................................................................................................................ 10
3.8 Mechanical Characteristics........................................................................................... 10
3.9 Pallet & Shipment ......................................................................................................... 11
4 Level 1 Cosmetic / Appearance / Alignment Service .......................................................... 12
4.1 Software / Firmware Upgrade Process......................................................................... 12
4.2 Alignment Procedure (for function adjustment)............................................................. 13
5. Level 2 Disassembly/Assembly/Circuit Board/Standard Parts Replacement..................... 18
5.1 Exploded Diagram ........................................................................................................ 18
5.2 Assembly Block ............................................................................................................ 19
5.3 Disassembly Block ....................................................................................................... 23
5.4 Block diagram...............................................................................................................27
5.5 Lay out.......................................................................................................................... 35
5.6 Circuit operation theory ................................................................................................ 38
5.7 Trouble Shooting Guide................................................................................................ 41
6. Dimmession drawing…………………………………………………………………….....…….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:
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. 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
100Vac 1.5A(max)AC Input Current
240Vac 0.8A(max)
100Vac,cold star,25°C 40A (max)
Inrush Current
240Vac,cold star,25°C 60A(max)
See Note2
AC-DC power Efficiency DC output full loading ≥75%
Note2. Before each test, the buck capacitors need to be discharged.
Before each test, it must be 10 minutes at least after the latest test.
Hot star not component be damaged.
3.2 Signal Interface
Input Connector Analog : D-sub 15
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
Video Signals Video RGB (Analog)
Video Impedance 75 Ohms (Analog)
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 1.3s
Sync Compatibility Separate Sync / Composite Sync / Sync on Green
Video Compatibility Shall be compatible with all PC type computers,
Macintosh computers, and after market video cards
3.3 Scan Range
Item Condition Specification
Horizontal Sync polarity: (+) or (-) 24kz~83KHz
Vertical Sync polarity: (+) or (-) 50Hz~76Hz
Out of Range
Sync don’t in the range:
Horizontal: 24kz~83KHz or
Vertical : 50Hz~76Hz
Message “Out of Range!” on screen

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Cable not
connect No VGA cable or DVI cable Message ‘’No cable connected !’’ on screen
3.4 Support Timings
BenQ customer preset Timings are as below:
P: Preset Mode
NP: Non Preset Mode
FS: Fail Save Mode (shows “Out of Range”, but still can see picture)
O: Out of Range (only show “Out of Range”, without picture)
Pixel
No. Format Horz Freq (kHz) Horz Polarity Vert Freq (Hz) Vert Polarity Pixel Clk (MHz) Mode
1 640x350 31.47 + 70.09 - 25.18 Preset
2 640x350 37.86 + 85.08 - 31.50 Fail Safe Mode
3 640x400 31.47 - 70.09 + 25.18 Non Preset
4 640x400 37.86 - 85.08 + 31.5 FailSafe Mode
5 640x480 35.00 - 66.67 - 30.24 Non Preset
6 640x480 31.47 - 59.94 - 25.17 Preset
7 640x480 37.86 - 72.81 - 31.50 Non Preset
8 640x480 37.50 - 75.00 - 31.50 Preset
9 640x480 43.27 - 85.01 - 36.00 Fail Safe Mode
10 640x500 31.00 - 57.76 - 25.25 Non Preset
11 720x400 31.47 - 70.08 + 28.32 Preset
12 720x400 37.93 - 85.04 + 35.5 FailSafe Mode
13 832x624 49.71 - 74.53 - 57.27 Preset
14 800x600 35.16 + 56.25 + 36.00 Non Preset
15 800x600 37.88 + 60.32 + 40.00 Preset
16 800x600 48.08 + 72.19 + 50.00 Non Preset
17 800x600 46.88 + 75.00 + 49.50 Preset
18 800x600 53.67 + 85.06 + 56.25 Fail Safe Mode
19 848x480 31.02 + 60.00 + 33.75 Non Preset
20 848x480 29.83 - 59.66 + 31.50 Non Preset
21 848x480 35.00 - 70.00 + 37.52 Non Preset
22 848x480 36.07 - 72.00 + 39.25 Non Preset
23 848x480 37.68 - 74.77 + 41.00 Non Preset
24 720x576 35.910 - 59.950 + 32.71 Non Preset
25 1024x768-I35.52 + 43.48 + 44.9 Fail Safe Mode
26 1024x768 48.36 - 60.00 - 65.00 Preset
27 1024x768 56.48 - 70.07 - 75.00 Non Preset
28 1024x768 57.67 - 72.00 + 78.43 Non Preset
29 1024x768 60.24 - 74.93 - 80.00 Preset
30 1024x768 60.02 + 75.03 + 78.75 Preset
31 1024x768 68.68 + 85.00 + 94.50 Fail Safe Mode
32 1152x720 44.86 - 60 + 66.75 Preset
33 1152x864 63.85 + 70.01 + 94.50 Non Preset
34 1152x864 67.50 + 75.00 + 108.00 Non Preset
35 1152x864 77.09 - 85.00 + 119.651 Fail Safe Mode
36 1152x870 68.68 - 75.06 - 100.00 Preset
37 1152x900 61.80 - 65.95 - 92.94 Preset
38 1152x900 71.73 - 76.07 - 105.59 Non Preset
39 1280x720 45.00 - 59.94 + 74.25 Preset
40 1280x720 44.77 - 59.86 + 74.50 Preset
41 1280x720 56.46 - 74.78 + 95.75 Preset
42 1280x768-R 47.40 + 60.00 - 68.25 Preset
43 1280x768 47.78 - 59.87 + 79.50 Preset
44 1280x768 60.29 - 74.89 + 102.25 Non Preset
45 1280x768 68.63 - 84.84 + 117.50 Fail Safe Mode
46 1280x800 49.31 + 59.91 + 71 Non Preset
47 1280x800 49.702 - 59.81 + 83.50 Preset
48 1280x800 58.3 - 70 + 88.25 NonPreset
49 1280x800 60.048 - 72 + 102.8 Non Preset
50 1280x800 62.795 - 74.934 + 106.6 Preset
51 1280x800 71.55 - 84.88 + 122.5 Fail Safe Mode
52 1280x960 60.00 + 60.00 + 108.00 Preset
53 1280x960 85.94 + 85.00 + 148.50 Fail Safe Mode
54 1280x1024 63.98 + 60.02 + 108.00 Preset
55 1280x1024 74.88 + 69.85 + 126.99 Non Preset
56 1280x1024 74.40 - 70.00 - 124.90 Non Preset
57 1280x1024 77.90 + 72.00 + 134.60 Non Preset

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58 1280x1024 79.98 + 75.02 + 135.00 Preset
59 1280x1024 81.18 - 76.16 - 135.09 Non Preset
60 1280x1024 91.15 + 85.02 + 157.50 Fail Safe Mode
61 1360x768 47.71 + 60.01 + 85.50 Preset
62 1366x768 47.71 + 59.79 + 85.50 Preset
63 1400x1050-R 64.74 + 59.95 - 101.00 Non Preset
64 1400x1050 65.32 - 59.98 + 121.75 Non Preset
65 1400x1050 82.28 - 74.87 + 156.00 Non Preset
66 1400x1050 93.88 - 84.96 + 179.50 Fail Safe Mode
67 1440x900-R 55.496 + 59.901 - 88.75 Preset
68 1440x900 55.935 - 59.887 + 106.5 Preset
69 1440x900 70.6 - 75 + 136.75 Preset
70 1600x1000-R 61.648 + 59.910 - 108.5 Preset
71 1600x1000 62.14 - 59.87 + 132.25 Non Preset
72 1600x1000 78.356 - 74.83 + 169.25 Non Preset
73 1600x1200-R 74.01 + 59.92 - 130.25 Non Preset
74 1600x1200 75.00 + 60.00 + 162.00 Preset
75 1600x1200 81.25 + 65.00 + 175.50 Non Preset
76 1600x1200 87.50 + 70.00 + 189.00 Non Preset
77 1600x1200 93.75 + 75.00 + 202.50 Non Preset
78 1600x1200 106.25 + 85.00 + 229.50 Out of Range
79 1680x1050-R 64.67 + 59.88 - 119.00 Non Preset
80 1680x1050 65.29 - 59.95 + 146.25 Preset
81 1680x1050 82.306 - 75 + 187 Preset
82 1600x1280 79.5 - 59.9 + 171.75 Non Preset
83 1792X1344 83.57 - 59.9 + 203.25 Fail Safe Mode
84 1792X1344 105.290 - 75.00 + 257.75 Out of Range
85 1856X1392 86.485 - 59.934 + 217.25 Out of Range
86 1856X1392 109 - 74.918 + 277.5 Out of Range
87 1800x1440 89.4 - 59.9 + 218.25 Out of Range
88 1920x1080-R 66.587 + 59.934 - 138.5 Preset
89 1920x1080 67.158 - 59.963 + 173 Preset
90 1920x1080 67.5 + 60 + 148.5 Preset
91 1920X1200-R5 61.418 + 49.974 - 127.750 Fail Safe Mode
92 1920X1200-R 74.04 + 59.95 - 154.00 Fail Safe Mode
93 1920X1200 74.56 - 59.89 + 193.25 Fail Safe Mode
94 1920X1200 94.04 - 74.93 + 245.25 Out of Range
95 1920X1440-R 88.822 + 59.9 - 184.75 Fail Safe Mode
96 1920X1440 89.532 - 59.968 + 233.500 Out of Range
97 1920X1440 112.50 - 74.9 + 298 Out of Range
98 2048x1152-R 70.992 + 59.9 - 156.75 Out of Range
99 2048x1152 71.584 - 59.9 + 197 Out of Range
100 2048x1536-R 94.7 + 59.9 - 209.25 Out of Range
101 2048x1536 95.4 - 59.9 + 267.25 Out of Range
102 2560x1600-R 98.713 + 59.972 - 268.5 Out of Range
103 2560x1600 99.4 - 59.9 + 348.5 Out of Range
Remark :
default mode : 1920x1080P 60Hz
3.5 Operational & Function Specification
3.5.1 Video Performance
* All Spec. of monitor need to warm up at lease 1hr
Supplier AUO CMO
Model name AUO M215HW01 V0: M216H1-L01

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Display Area 476.64(H)x268.11(V) 477.504(H)x268.596(V)
Pixel Pitch 0.248(H)x0.248(V) 0. 248(H)x0.248(V)
Display Colors 16.7M(6 Bit+Hi-FRC)
Number of Pixel 1,920(H) X 1,080(V),
Brightness Min: 240cd/m2; Typical: 300cd/m2Min: 250cd/m2; Typical: 300cd/m2
Contrast Ratio Min: 600:1
Typical: 1000:1
Min: 700:1
Typical: 1000:1
Viewing Angle Hor: 170°, Ver: 160° (Typical, CR=10) Hor: 170°, Ver: 160° (Typical, CR>10)
Display Mode Normally White
Frame rate 50~75Hz 50~75Hz
Response Time Typical: 5ms; Max: 8ms Typical: 5ms; Max: 8ms
Surface
Treatment Anti-glare, 3H Hard coating (3H), AG(Haze25%)
Lamp 4 CCFL
Outline
Dimension
495.6 (W) X 292.2 (H) X 16.35 (D)
(typ.) 499.5 (W) X 292.6 (H) X 17 (D) (typ.)
Brightness
uniformity Min: 75%; Typical: 80% / 9 points. Min: 75% / 9 points.
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 : 1920 x 1080@60HZ
Video input level : 700 mV ± 2%
Warm-up time : 30 minutes
Item Condition SPEC
Brightness=0%
Contrast = 0%
NA
Brightness=100%
Contrast = 100%
AUO ≥240 cd/m2
CMO ≥250 cd/m2
Brightness=90%
Contrast = 50%
Luminance Range
NA

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3.5.3 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
3.5.4
Speaker : 1.5W 12Ω X 2
Input impedance : ≥10K ohm
Frequency response range : 500Hz – 20 kHz
Signal to noise ratio : ≥75 dB ±3
Output power : 1.0 W + 1.0 W (Typical) @5%THD (Input sine wave signal: 1 KHz/0.7Vrms)
3.5.5 Electrostatic discharge Requirements
Item Condition Spec Remark
Contact discharge : 4KV ●
Contact discharge : 8KV
Air discharge : 8KV ●
Electrostatic
Discharge InnoLux SPEC
Air discharge : 15KV
D-sub cable pin
need test 4KV and
DVI cable test 4KV
3.5.6 Reliability
Items Condition Spec Note
MTBF 95% Confidence ≧60,000 Hours
CCFL Life time Luminance becomes 50% ≧40,000 Hours at 7.5mA
(min)
Note1
Note1. Display an all white field at mid Brightness and Contrast settings.
3.5.7 Audio performance
Items Specification
Speaker 1.5W 12ΩX 2
Input impedance ≥10K ohm

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Frequency response range 500Hz – 20kHz
Signal to noise ratio ≥70 dB±3
Output power 1.0 W + 1.0 W (Typical) @5%THD (Input sine wave
signal:1KHz/0.7Vrms)
3.6 LCD Characteristics
3.6.1 The physical definition &technology summary of LCD panel
Supplier AUO CMO
Model name AUO M215HW01 V0: M216H1-L01
Display Area 476.64(H)x268.11(V) 477.504(H)x268.596(V)
Pixel Pitch 0.248(H)x0.248(V) 0. 248(H)x0.248(V)
Display Colors 16.7M(6 Bit+Hi-FRC)
Number of Pixel 1,920(H) X 1,080(V),
Brightness Min: 240cd/m2; Typical: 300cd/m2Min: 250cd/m2; Typical: 300cd/m2
Contrast Ratio Min: 600:1
Typical: 1000:1
Min: 700:1
Typical: 1000:1
Viewing Angle Hor: 170°, Ver: 160° (Typical, CR=10) Hor: 170°, Ver: 160° (Typical, CR>10)
Display Mode Normally White
Frame rate 50~75Hz 50~75Hz
Response Time Typical: 5ms; Max: 8ms Typical: 5ms; Max: 8ms
Surface
Treatment Anti-glare, 3H Hard coating(3H),AG(Haze25%)
Lamp 4 CCFL
Outline
Dimension
495.6 (W) X 292.2 (H) X 16.35 (D)
(typ.) 499.5 (W) X 292.6 (H) X 17 (D) (typ.)
Brightness
uniformity Min: 75%; Typical: 80% / 9 points. Min: 75% / 9 points.
3.7 User Controls
User’s hardware control definition:
3.8 Mechanical Characteristics
3.8.1Dimension
Dimension (Monitor with Stand) Spec
Width 509.6mm
Height 392.9mm

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Depth 175mm
Monitor Weight
4.3±0.5 Kg ( Net )
6.1±0.5Kg( Gross / with packing)
3.8.2 Weight
Item condition Spec OK Remark
Monitor (Net) 4.3±0.5 Kg ( Net )
Monitor with
packing(Gross)
6.1±0.5Kg( Gross / with packing)
3.8.3 Plastic
Item TEXTURE No. COLOR No. Material
Front Bezel
HIGH GLOSSY(光澤度
95)POLISHING 6000 &
MT11000 & MT11006
BCS-7015A(Black) ABS+PMMA
Back cover
HIGH GLOSSY(光澤度
95)POLISHING 6000 &
POLISHING 2000 &
MT11020&MT11006
BCS-7015A(Black) ABS
Arm rear
HIGH GLOSSY(光澤度
95)POLISHING 6000 &
T11006 & MT11000
BCS-7015A(Black) ABS+PMMA
Arm front HIGH GLOSSY(光澤度
95)POLISHING 6000
BCS-7015A(Black) ABS+PMMA
Base
HIGH GLOSSY(光澤度
95)POLISHING 6000 &
MT11000 & 放電花
BCS-7015A(Black) ABS+PMMA
Function key HIGH GLOSSY(光澤度
95)POLISHING 6000
BCS-7015A(Black) ABS+PMMA
Led lens HIGH GLOSSY(光澤度
95)POLISHING 6000
Clear PC
3.8.4 Carton
3.9Pallet & Shipment
3.9.1 Container Specification
Stowing Type Containter Quantity of
Produces (sets)
(Every container)
Quantity of
Produces (sets)
(Every Pallet)
Quantity of
Pallet (sets)
(Every container)
Carton:Item condition Spec OK NA Remark
Color 按照客戶提供的
色板來做
Material C Flute
√A Flute For JP
Compression strength 200 KGF
√JP:250 KGF
Burst strength 16 KGF/cm2
√JP:19.4 KGF/cm2
Stacked quantity 4 Layers
√4 Layers

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20’SEA
784 Pallet A: 88
Pallet B:72
Pallet A:4
Pallet B:6
40’SEA 1656 Pallet A:88
Pallet B:72
Pallet A:9
Pallet B:12
20’AIR 528 Pallet A:60
Pallet B:48
Pallet A:4
Pallet B:6
40’AIR 1116 Pallet A:60
Pallet B:48
Pallet A:9
Pallet B:12
With Pallet
40’ N/A N/A N/A
Without Pallet
3.9.2 Specification
Product:
Net Weight (Kg) Gross Weight(Kg) Dimension w/o Base
LxWxH (mm)
Dimension w/ Base
LxWxH (mm)
4.8±0.3 Kg ( Net) 6.1±0.5Kg --- 509.6*175*392.9mm
Package:
Items Spec
Packaging Refer to ME PACKING SPEC
Ink The ink shall not rub off after a suitable drying time
Shipping Carton Type One Piece Construction
Shipping Carton Handholds Yes
Length 570m
Height 458m
Width 125
Gross Weight 6.1kg+/-0.5
Units per Pallet 88 sets / pallet A
72 sets / pallet B
4 Level 1 Cosmetic / Appearance / Alignment Service
4.1 Software / Firmware Upgrade Process
Upload firmware to Flash ROM via VGA Cable
1. Connect ISP board between monitor and PC as below configuration.
Insert to Parallel
Port on PC
ISP Board
LCD Monitor
D-Sub
D-SUB

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2. Select the Flash ROM type which is used in this monitor, then select the ISP button, and then choose
corresponding firmware, and load them to Flash ROM.
4.2 Alignment Procedure (for function adjustment)
4.2.1 Preparation:
1. Setup input timing VESA to 1920*1080@60Hz,32-Grays pattern.
2. Setup units and keep it warm up for at least 30 minutes.
4.2.2 Timing adjustment
1. Enter to factory mode setting area (by pressing "ENTER"+ "MENU" + "POWER" at the same time during
power off).
2. Check the settings to following values:
contrast =50;
brightness=90;
3. Then turn off the monitor power.
4.2.3 Function key Definitions
4.2.3.1 Control buttons on the rear side of monitor
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 Brightness/contrast Menu
press[
◄] to Show Picture Mode Menu.
[POWER] Power on or power off the monitor
[Auto] press [Auto] to perform auto-adjustment
4.2.3.2 Hot Key Operation
FUNCTION HOT KEY OPERATION DESCRIPTION
Parallel
Port

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MENU □□Enter Auto POWER
FACTORY MODE ●
●●
Press[MENU], [Enter]& [POWER] at
the same time, when Monitor is Power
On OSD menu will be shown with “F”
on the left top. Select “F” for entering
factory mode.
Picture Mode ●
To Show & Change Picture Mode
Menu
Auto Adjustment ●
press [Auto] to process, Auto
Adjustment
Service Page ●●Press [MENU] + [POWER] to Enter
Service Page Mode when power off
Input Source ●Press [Enter] to change Input Source
when OSD isn’t Display.
Note: Picture Mode Standard <( Movie <( Dynamics <( Photo <( sRGB <( Standard
Auto Power on/off function in service mode:
Default is “off”, Monitor will remember the last status before AC off. And monitor would always be off while AC
off->on in “off” mode.
4.2.3.3 OSD Control
The On-Screen Display (OSD) shall be an easy to use icon based menu through keypad OSD
buttons or remote control unit. The unit shall leave the factory with all OSD controls set to their
default values.
First level Second level Third level Fourth level Default
Auto Adjustment - - -
H. Position (0~100) - 50
V. Position (0~100) - 50
Pixel Clock (0~100) - 50
DISPLAY
Phase (0~63) - -
Brightness (0~100) - 90
Contrast (0~100) - 50
Sharpness (1~5) - 3
Normal Normal
Bluish -
Reddish -
*Color
temperature User Mode
¾Red (0~100)
¾Green (0~100)
¾Blue (0~100)
100
Color
Reset Color (YES/NO)
PICTURE
Dynamic Contrast *Dynamic
Contrast (0,1,2,3,4,5)
Standard StandardPICTURE
ADVANCED
**Picture Mode
Movie Sharpness 不可调节 1.任一项模式下 Senseye Demo 设

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Dynamics Sharpness 不可调节
Photo Sharpness 不可调节
为ON 另外两个模式下的 Senseye
Demo 自动变为 ON
2. Senseye Demo 处于 ON 时,做
Auto 自动变为 OFF
sRGB Sharpness 不可调节
Senseye Demo (ON/OFF) OFF
Full full
Display Mode Aspect
Input（DVI Model）D-sub/DVI D-sub
Language
17 languages
English/日本語/简体中文/繁體中文
/Français/Deutsch/Italiano/Español/Polski/
Česky/Magyar/(SiCG/BiH/CRO)/Română/Ned
erlands/Русский/Svenska /Português
English
H. Position (0~100) 50
V. Position (0~100) 50
Display Time (5, 10, 15, 20, 25, 30) 15
OSD Settings
OSD Lock (ON/OFF)（按 Menu 鍵15s 即可解除鎖定） OFF
DDC/CI (ON/OFF) - ON
Information - -
Reset All (YES/NO) -
SYSTEM
4.2.3.4. Factory Mode Introduction
Press[MENU], [Enter]& [POWER] at the same time, when Monitor is Power On OSD menu will be shown with
“F” on the left top. Select “F” for entering factory mode.
AUTO Level: Automatically calibrate chip ADC parameter by using chip internal DAC.
GAIN: ADC gain value
OFFSET: ADC offset value
C1-Blue: Set color temperature 9300K
C2-Red: Set color temperature 5800K
C3-Normal: Set color temperature 6500K
C5-User: Set user preferred color temperature
Lang type: 17
Reset BL Hr: the time of backlight
Reset Total Hr: the total time when connect power
Return: Escape from Factory menu.
4.2.3.5After repair, to ensure the quality you should do the following test and adjustment
Item Content Equipment
Test OSD
function
1.Signal is set as 1920×1080@60Hz under General-1
2.Checking whether each single function key and compound function ke
y
can be worked.
Chroma
Signal Generator

16
Contrast
Check
1. Set input mode to 1920×1080@60Hz
2. Set Pattern to 32 gray shades
3. Set brightness/contrast to the max. The brightest 4~8 shades brightness
cannot be distinguished.
Chroma
Signal Generator
Color
Temperature
1. Do “Auto Color Balance” at 1920×1080@60Hz, 32gray shades
2. Measure color temperature, check it complies with the
following temperature :
5800K x=0.326 +/- 0.02, y = 0.342+/-0.02
6500K x = 0.313 +/- 0.02, y = 0.329+/-0.02
9300K x = 0.283 +/- 0.02, y = 0.297+/-0.02
Chroma Signal Generator
and color analyzer
Modes
switching
check
1. Use Chroma Pattern Generator to make sequence.
VESA (640x480 800x600 1024x768 1440x900 1920x1080),
And power saving signal,etc.
2. Confirm the above timing modes must be full screen and
the picture must be normal.
Chroma
Signal Generator
VGA cable
detector
When VGA cable is not plugged, the monitor will work in power saving
mode. Visual check
Chroma Si
g
nal Generator
Panel Flicker
check
1. Mode: 1920×1080@60Hz
2. Set Brightness& contrast to default value
3. Do “Auto Adjustment”
4. Shut down PC to check whether there’s glitter on the center
of the picture.
Chroma signal generator
& PC
Power saving 1.Mode: 1920×1080@60Hz
2. Pattern: full white
3. Brightness: Max.
4. Contrast: Default
at each mode
Chroma signal generator
Status H-sync V-sync Video Power LED
Power On on on active ≤48W Green
off on blanked < 2W Amber+blue
on off blanked < 2W Amber+blue
Power Saving
off off blanked < 2W Amber+blue

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Power Off -- -- - < 1W Off

18
5. Level 2 Disassembly/Assembly/Circuit Board/Standard Parts Replacement
5.1 Exploded Diagram

19
5.2 Assembly Block
Note: The assembly direction please following direction of arrowhead
ASSY CHASSIS *1
I/F BOARD *1
POWER BOARD *1
SCREW,M3*6,Zn-Cc *6
H4.75*11.8*4#Bolt *4(or *2)
LVDS CABLE *1
KEYPAD CABLE *1
ASSYARM *1
ASSY BEZEL *1
ASSY,PANEL *1
FOIL,PET+AL,140*40mm *2
SCREW,P,CROSS,M4*10 *2
KEYPAD *1
FOIL,AL,L50*W30*T0.09mm,LE2294 *1
ASSY BACK COVER *1
LE 21P8
LCD Monitor
BEZEL *1
LOGO, BENQ, LE20D6 *1
FNCTION KEY *1
LED LENS *1
LOGO *1
ASSY BASE *1
BASE ,LE21P8 *1
RUBBER FOOT *5
ARM FRONT,LE21P8 *1
ARM REAR, LE21P8 *1
SCREW,B, CROSS,T.T-4x8 *3
CLIP BLACK, LE21B8 *1
ASSY HINGE,LE21P8 *1
BACK COVER, LE21P8 *1
LOGO BACK *1
BRACKET VESA *4

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1 Assemble
the keypad
2
Assemble
the panel
with
front-bezel
3
Assemble
chassis &
Plug in the
LVDS
4 Plug in the
lamp lines