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Applicable Country & Regions: China
Service Manual for BenQ:
LCD G922HD
(D-SUB+DVI+ Silver Black/
Black Bezel)
Product Service Manual – Level 1~2
Version: 1st
Date:04-16-2009
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
most recent version of this manual.
, to ensure that you have the
First Edition (April, 2009)
©
Copyright BenQ Corporation 2009. All Right Reserved.
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18.5” LCD Color Monitor BenQ G922HD
Content Index
Abbreviations & Acronyms........................................................................................................................................3
1. About this Manual...................................................................................................................................................5
1.1 Important ............................................................................................................................................................5
1.2 Trademark ..........................................................................................................................................................5
2. Introduction.............................................................................................................................................................6
2.1 RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS.....................................................6
2.2 Safety Notice ......................................................................................................................................................6
2.3 Compliance Statement .......................................................................................................................................6
3. General Description................................................................................................................................................7
4. Related service information...................................................................................................................................7
5. Product Overview ...................................................................................................................................................8
5.1 Monitor Specifications ........................................................................................................................................8
5.2 Packing.............................................................................................................................................................10
Level 1 Cosmetic / Appearance / Alignment Service ............................................................................................12
Visual Inspection & Cleaning..................................................................................................................................12
Software/Firmware Upgrade Process ....................................................................................................................12
DDC instruction ......................................................................................................................................................15
Adjustment / Alignment Procedure.........................................................................................................................23
Level 2 Circuit Board and Standard Parts Replacement ......................................................................................32
Product Exploded View ..........................................................................................................................................32
Six angles’ view ......................................................................................................................................................33
Product Disassembly..............................................................................................................................................34
Block Diagram ........................................................................................................................................................38
Schematic Diagram ................................................................................................................................................40
Troubleshooting Guide ...........................................................................................................................................47
PCB LAYOUT .........................................................................................................................................................55
Appendix 1 – Screw List / Torque ...........................................................................................................................58
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18.5” LCD Color Monitor BenQ G922HD
Abbreviations & Acronyms
A
ADC Analog to Digital Converter
AFC Automatic Frequency Control: control signal used to tune to the correct frequency
B
BenQ BenQ Corporation
BTSC Broadcast Television System Committee
C
CPU Central Process Unit
CVBS Composite Video Blanking and Synchronization
D
DLP Digital Light Processing / Texas Instruments®
DMD Digital Micromirror Device
DRAM Dynamic RAM
DVI Digital Video Interface
DVI-I Digital Video Interface-Integrated
E
EEPROM Electrically Erasable and Programmable Read Only Memory
F
FLASH FLASH memory
G
G-TXT Green Teletext
H
HDMI High Definition Multimedia Interface, digital audio and video interface
HP Head Phone
I
I2C Integrated IC bus
L
LED Light Emitting Diode
LVDS Low Voltage Differential Signal, data transmission system for high
M
MOSFET Metal Oxide Semiconductor Field Effect Transistor
N
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18.5” LCD Color Monitor BenQ G922HD
NC Not Connected
NVM Non Volatile Memory: IC containing TV related data (for example, options)
O
OSD On Screen Display
P
PC Personal Computer
PCB Printed Circuit Board (or PWB)
R
RC Remote Control transmitter
RGB
ROM Read Only Memory
S
SDA Data signal on I2C bus
SDRAM Synchronous DRAM
SW Sub Woofer / Software
T
THD Total Harmonic Distortion
V
VGA Video Graphics Array
Y
YPbPr
Red, Green and Blue. The primary color signals for TV. By mixing levels of R, G
and B, all colors (Y/C) are
Component video (Y= Luminance, Pb/ Pr= Color difference signals B-Y and R-Y,
other amplitudes w.r.t. to YUV)
Y/C
Video related signals: Y consists of luminance signal, blanking level and sync; C
consists of color signal.
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18.5” LCD Color Monitor BenQ G922HD
1. About this Manual
The purpose of Service Manual is to provide a guide line to engineers to repair different models. The
appearance and capability is introduced in this Service Manual. It is better for repair engineer to have a rough
idea of this model through reading the Service Manual. Please do pay attention to the item part of the
disassembly when repair the machine and also do the protection of panel any time. When repairing the circuit
board, please follow the requirement of RoHS and refer to the circuit diagram and repairing process that
attached in the Service Manual. The method of firmware updated, the way of using the menu and some
information that may be used when repairing are also attached in the Service Manual that provide repair
engineer various choice.
1.1 Important
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
“Important Safety Information”.
1.2 Trademark
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18.5” LCD Color Monitor BenQ G922HD
2. Introduction
This section contains general service information, please read through carefully. It should be stored for easy
access place.
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, otherwise it may explode.
9. Refer to government requirements for battery recycling or disposal.
2.3 Compliance Statement
Caution: This Optical Storage Product contains a Laser device. Refer to the product specifications and your local
Laser Safety Compliance Requirements.
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18.5” LCD Color Monitor BenQ G922HD
3. General Description
This new LCD (Liquid Crystal Display) monitor BenQ G922HD offers numerous features and functions, for example:
● TFT display (Thin Film Transistor; active matrix)
● Minimal space requirements thanks to slim casing
● Optimum ergonomic characteristics (totally distortion-free, excellent picture definition and color purity right into
the corners)
● Contrast ratio 1000:1, brightness 250nits
● WXGA resolution (1366 x 768)
● Presentation of up to 16.7 million colors (in conjunction with an appropriate graphics card)
● Automatic scanning of horizontal frequencies from 30 to 63 kHz and refresh rates (vertical frequencies) from 50 to
76 Hz (absolutely flicker-free)
● Digital screen controller with microprocessor for storing 21 different display modes
● Freely adjustable color alignment for matching the screen colors to the colors of various input and output devices
● Convenient operation via integrated OSD (On-Screen-display) menu
● VESA-DDC compatibility
● Plug & play capability
● Power management for reducing power consumption when the computer is not in use
● Compliance with the recommendations in accordance with TCO’03
This operating manual contains important information you require to start up and run your LCD monitor.
This specification defines the requirements for the 18.5” MICROPROCESSOR based Multi-mode supported high
resolution color LCD monitor. This monitor can be directly connected to general 15-pin D-sub VGA connector and
DVI connector, also supports VESA DPMS power management and plug & play function.
Additional information
Due to the nature of liquid crystal display (LCD) technology, the picture resolution is always fixed. For the best
display performance, please set the display resolution to 1366x768 pixels with an aspect ratio of 16:9. This is called
“Native Resolution” or maximal resolution – that is, the clearest picture. Lower resolutions are displayed on a full
screen through an interpolation circuit. Image blurring across pixel boundaries can occur with the interpolated
resolution depending upon the image type and its initial resolution.
4. Related service information
This Service Manual contains general information. There are 2 levels of service:
Level 1: Cosmetic / Appearance / Alignment Service
Level 2: Circuit Board or Standard Parts Replacement
Service Web Site
eSupport URL: http://esupport.benq.com
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5. Product Overview
5.1 Monitor Specifications
G922HD
Panel Type (TN / VA / IPS) TN
Panel Size 18.5"W(2 lamps)
Display Area 409.8 x 230.4
Max. Resolution 1366x768
Brightness (Typ.) 250 nits
Contrast Ratio (Typ.) / DCR (Min.) 1000:1 (Panel) /40000:1 (DCR TYP) Min :20000:1
Panel / Display
Viewing Angle (H/V), CR≧10
Display Colors 16.7M (6bit+Hi-FRC)
170/160
Response Time 5ms (Tr+Tf)
GtG response Time N/A
NTSC ratio 0.72
Panel maker AUO/CMO
BenQ Senseye
BenQ Senseye
TM
Technology Yes
TM
Preset Modes
5 Modes (by hotkey) : Standard / Movie / Dynamic /
Photo / s-RGB
Normal (6500°K) / Reddish (5800°K) / Bluish
Color Temperature Selection
Video
(9300°K) / User Mode
Hor. Frequency (KHz) 30~63KHz
Ver. Frequency (Hz) 50Hz~76Hz
Video Bandwidth (MHz) 110Mhz
Audio Speakers (built-in) N/A
Input/Output
Power Supply
PC Video Input D-sub + DVI-D
Audio line in Yes
Earphone Jack NO
Voltage Rating AC: 100~240V (Built-in)
Power-On Mode 23W
Standby Mode <1W
Power Off Mode <0.5W
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18.5” LCD Color Monitor BenQ G922HD
Chassis Colors Silver Black/Black
Carton Brown Carton with at least C flute
Power LED Green (ON)/ Amber (Standby)
Tilt (Up / Down) 20° ~ -5°
VESA Wall Mount 100 x 100mm
Kensington Lock Yes
Mechanical Design
Physical Dimension (WxHxD) TBD
Box Dimension (WxHxD) TBD
Net Weight (Esti.) TBD
Gross Weight (Esti.) TBD
Container Loading (40') 2070
Container Loading (20') 990
17 Languages (English / Francais / Deutsch /
Italiano / Espanol / Polish / Czech / Hungarian /
Multi-language Support OSD
Other feature Vista Vista Premium
Accessories
Regulation Approvals Refer to the worksheet "RFQ-Regulatory"
Serbo-croatian / Romanian / Netherlands / Russian
/ Swedish / Protuguese / Japanese / Chinese /
S-Chinese)
VGA cable, power cord, warranty card, quick start
guide, CD manual
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18.5” LCD Color Monitor BenQ G922HD
5.2 Packing
When packing the monitor into the carton, please follow the pictures as below.
Using the EPE bag to pack the monitor without base
Using the EPS to pack the monitor
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18.5” LCD Color Monitor BenQ G922HD
Putting the base and D-SUB cable in the position as the picture shows above.
Power cord
User manual
Putting the monitor and accessories into the carton
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18.5” LCD Color Monitor BenQ G922HD
Level 1 Cosmetic / Appearance / Alignment Service
Visual Inspection & Cleaning
• Cleaning. Always unplug your monitor from the wall outlet before cleaning. Clean the LCD monitor surface with a
lint-free, non-abrasive cloth. Avoid using any liquid, aerosol or glass cleaners.
• Slots and openings on the back or top of the cabinet are for ventilation. They must not be blocked or covered.
Your monitor should never be placed near or over a radiator or heat source, or in a built-in installation unless
proper ventilation is provided.
• Never push objects or spill liquid of any kind into this product.
Software/Firmware Upgrade Process
1. When does the part, need the tools as follow:
a. An i486 (or above) personal computer or compatible.
b. Microsoft operation system Windows 95/98/2000/XP.
c. “PORT95NT.exe” program
d. ISP BOARD (x1), Printer cable (x1), VGA cable (x1)
2. Install the “PORT95NT.exe”, and restart the computer.
Note: After installation, you must restart the PC to take the setup to effect.
3. Connect the ISP board as follow:
Connect to
the PC LPT
Connect to the
BenQ model
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18.5” LCD Color Monitor BenQ G922HD
4. The process of ISP write is as follows.
a. Double-click
，running the program as follows:
b. Choose
, click , running the program as follows:
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18.5” LCD Color Monitor BenQ G922HD
c. Click
d. Click
e. Click
icon, search the program” BenQ_G922HD_RTD2525LH_CMO185.H00”, and click open:
icon, search the program” BenQ_G922HD_RTD2525LH_CMO185.H01”, and click open:
icon, search the program” BenQ_G922HD_RTD2525LH_CMO185_EXTEND”, and click open:
f. Click
icon, until appear the follow Fig, writer completed
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18.5” LCD Color Monitor BenQ G922HD
DDC instruction
General
DDC Data Re-programming
In case the main EEPROM with Software DDC which store all factory settings were replaced because a defect,
repaired monitor’ the serial numbers have to be re-programmed.
It is advised to re- soldered the main EEPROM with Software DDC from the old board onto the new board if circuit
board have been replaced, in this case the DDC data does not need to be re-programmed.
Additional information about DDC (Display Data Channel) may be obtained from Video Electronics Standards
Association (VESA). Extended Display Identification Data (EDID) information may be also obtained from VESA.
1. When does the part, need the tools as follow:
a. An i486 (or above) personal computer or compatible.
b. Microsoft operation system Windows 95/98/2000/XP.
c. “PORT95NT.exe, TPVDDC.exe” program.
d. OSD SN BOARD (x1), Printer cable(x1), VGA cable (x1), 12V DC power source
2. Install the “PORT95NT.EXE”, and restart the computer.
The process of installing “PORT95NT” has been specified in, so it will not be specified again. If you have any
problem, please read it.
3. Connect the DDC Board as follow:
When you write digital
EDID, Connect this port
Connect to
When you write analog
EDID, Connect this port
the PC LPT
12V DC Input
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18.5” LCD Color Monitor BenQ G922HD
4. Take analog DDC write for example, as follow
a. Double-click
，appear as follow:
b. Choose “Analog ” and then click “Loadfile”, it will show the picture as follow:
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18.5” LCD Color Monitor BenQ G922HD
c. Click “OK”, it will show the picture as follow:
d. Input the date in “Year-Month-Day” box, Key in the same 13 numbers in the Input SN and Verify SN, then click
“Program”, when the analog DDC Write complete, it will show the picture as follow:
Note:
The way of digital DDC Write is the same as analog.
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18.5” LCD Color Monitor BenQ G922HD
G922HD EDID
Analog
128 bytes EDID Data (Hex):
x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF
0: 00 FF FF FF FF FF FF 00 09 D1 3D 78 45 54 00 00
10: 0D 0F 01 03 0E 29 17 78 2E 3D 85 A6 56 4A 9A 24
20: 12 50 54 A5 6A 00 81 C0 81 CF 01 01 01 01 01 01
30: 01 01 01 01 01 01 66 21 56 AA 51 00 1E 30 46 8F
40: 33 00 9A E6 10 00 00 1E 00 00 00 FF 00 33 34 35
50: 36 38 39 37 30 31 32 33 0A 20 00 00 00 FD 00 32
60: 4C 1E 3F 0B 00 0A 20 20 20 20 20 20 00 00 00 FC
70: 00 42 65 6E 51 20 47 39 32 32 48 44 0A 20 00 94
Decoded EDID data
<---Header--->
Header: 00 FF FF FF FF FF FF 00
<-x-Header-x->
<---Vendor/Product Identification--->
ID Manufacturer Name: BNQ
ID Product Code: 783D
ID Serial Number: 45540000
Week of Manufacture: 13
Year of Manufacture: 2005
<-x-Vendor/Product Identification-x->
<---EDID Structure Version/Revision--->
EDID Version#: 01
EDID Revision#: 03
<-x-EDID Structure Version/Revision-x->
<---Basic Display Parameters/Features--->
Video i/p definition: Analog
Signal Level Standard: 0.700V/0.300V(1.000Vpp)
Setup: Blank-to-Black not expected
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18.5” LCD Color Monitor BenQ G922HD
Separate Sync Support: Yes
Composite Sync Support: Yes
Sync. on green video supported:Yes
Serration of the Vsync.Pulse is not required.
Max. H. Image Size : 41cm.
Max. V. Image Size : 23cm.
Display Gamma: 2.2
DPMS Features, Stand-by: No.
DPMS Features, Suspend: No.
DPMS Features, Active off: Yes.
Display Type: R.G.B color display.
Standard Default Color Space: Primary color space.
Preferred Timing Mode: In First Detailed Timing.
GTF supported: No.
<---Basic Display Parameters/Features--->
<---Color Characteristics--->
Red x: 0.6484375000
Red y: 0.3388671875
Green x: 0.2929687500
Green y: 0.6025390625
Blue x: 0.1425781250
Blue y: 0.0703125000
White x: 0.3125000000
White y: 0.3291015625
<-x-Color Characteristics-x->
<---Established Timings--->
Established Timings 1: A5
-720x400 @70Hz VGA,IBM
-640x480 @60Hz VGA,IBM
-640x480 @75Hz VESA
-800x600 @60Hz VESA
Established Timings 2: 6A
-800x600 @75Hz VESA
-832x624 @75Hz Apple,Mac II
-1024x768 @60Hz VESA
-1024x768 @75Hz VESA
Established Timings 3: 00
<-x-Established Timings-x->
<---Standard Timing Identification--->
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-1280x720 @60 Hz
-1280x720 @75 Hz
<-x-Standard Timing Identification-x->
<---Detailed Timing Descriptions--->
Detailed Timing: 1366x768 @ 60Hz.
<-x-Detailed Timing Descriptions-x->
<---Detailed Timing Descriptions--->
Detailed Timing: FF (Monitor SN) '34568970123'
Detailed Timing: FD (Monitor limits)
Min. V. rate: 50Hz
Max. V. rate: 76Hz
Min. H. rate: 30KHz
Max. H. rate: 63KHz
Max. Pixel Clock: 110MHz
Detailed Timing: FC (Monitor Name) 'BenQ G922HD'
<-x-Detailed Timing Descriptions-x->
Extension Flag: 00
Checksum: 94
Digital
128 bytes EDID Data (Hex):
x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF
0: 00 FF FF FF FF FF FF 00 09 D1 3E 78 45 54 00 00
10: 12 10 01 03 80 29 17 78 2E 3D 85 A6 56 4A 9A 24
20: 12 50 54 A5 6A 00 81 C0 81 CF 01 01 01 01 01 01
30: 01 01 01 01 01 01 66 21 56 AA 51 00 1E 30 46 8F
40: 33 00 9A E6 10 00 00 1E 00 00 00 FF 00 31 35 36
50: 34 39 38 37 30 32 33 31 0A 20 00 00 00 FD 00 32
60: 4C 1E 3F 0B 00 0A 20 20 20 20 20 20 00 00 00 FC
70: 00 42 65 6E 51 20 47 39 32 32 48 44 0A 20 00 1D
Decoded EDID data
<---Header--->
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18.5” LCD Color Monitor BenQ G922HD
Header: 00 FF FF FF FF FF FF 00
<-x-Header-x->
<---Vendor/Product Identification--->
ID Manufacturer Name: BNQ
ID Product Code: 783E
ID Serial Number: 45540000
Week of Manufacture: 18
Year of Manufacture: 2006
<-x-Vendor/Product Identification-x->
<---EDID Structure Version/Revision--->
EDID Version#: 01
EDID Revision#: 03
<-x-EDID Structure Version/Revision-x->
<---Basic Display Parameters/Features--->
Video i/p definition: Digital
Max. H. Image Size : 41cm.
Max. V. Image Size : 23cm.
Display Gamma: 2.2
DPMS Features, Stand-by: No.
DPMS Features, Suspend: No.
DPMS Features, Active off: Yes.
Display Type: R.G.B color display.
Standard Default Color Space: Primary color space.
Preferred Timing Mode: In First Detailed Timing.
GTF supported: No.
<---Basic Display Parameters/Features--->
<---Color Characteristics--->
Red x: 0.6484375000
Red y: 0.3388671875
Green x: 0.2929687500
Green y: 0.6025390625
Blue x: 0.1425781250
Blue y: 0.0703125000
White x: 0.3125000000
White y: 0.3291015625
<-x-Color Characteristics-x->
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18.5” LCD Color Monitor BenQ G922HD
<---Established Timings--->
Established Timings 1: A5
-720x400 @70Hz VGA,IBM
-640x480 @60Hz VGA,IBM
-640x480 @75Hz VESA
-800x600 @60Hz VESA
Established Timings 2: 6A
-800x600 @75Hz VESA
-832x624 @75Hz Apple,Mac II
-1024x768 @60Hz VESA
-1024x768 @75Hz VESA
Established Timings 3: 00
<-x-Established Timings-x->
<---Standard Timing Identification--->
-1280x720 @60 Hz
-1280x720 @75 Hz
<-x-Standard Timing Identification-x->
<---Detailed Timing Descriptions--->
Detailed Timing: 1366x768 @ 60Hz.
<-x-Detailed Timing Descriptions-x->
<---Detailed Timing Descriptions--->
Detailed Timing: FF (Monitor SN) '15649870231'
Detailed Timing: FD (Monitor limits)
Min. V. rate: 50Hz
Max. V. rate: 76Hz
Min. H. rate: 30KHz
Max. H. rate: 63KHz
Max. Pixel Clock: 110MHz
Detailed Timing: FC (Monitor Name) 'BenQ G922HD'
<-x-Detailed Timing Descriptions-x->
Extension Flag: 00
Checksum: 1D
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Adjustment / Alignment Procedure
Adjusting the Picture
You can use the OSD (On Screen Display) menu to adjust all the settings on your monitor.
Press the MENU key to display the following main OSD menu.
There are four main OSD menus:
1. Display
2. Picture
3. Picture Advanced
4. System
Use the
The OSD menu languages may differ from the product supplied to your region.
Display menu
or keys to highlight a menu item, and press the ENTER key to enter the Menu item settings.
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18.5” LCD Color Monitor BenQ G922HD
1. Press the MENU key to display the main menu.
2. Press the
3. Press the
4. Press the
5. To return to the previous menu, press the MENU key.
or keys to select DISPLAY and then press the ENTER key to enter the menu.
or keys to move the highlight to a menu item and then press the ENTER key to select that item.
or keys to make adjustments or selections.
Item Function Operation Range
Optimizes and adjusts the screen settings automatically for you.
The AUTO key is a ‘hot-key’ for this function.
Auto
Adjustment
H. Position Adjusts the horizontal position of the screen image. 0 to 100
V. Position Adjusts the vertical position of the screen image. 0 to 100
Pixel Clock
Phase
When you connect a digital video output using a digital
(DVI) cable to your monitor, the AUTO key and the Auto
Adjustment function will be disabled.
Adjusts the pixel clock frequency timing to synchronize with the
analog input video signal.
Not applicable to a digital input signal.
Adjusts the pixel clock phase timing to synchronize with the
analog input video signal.
Press the ENTER
key to select this
option and make
adjustment.
Press the
keys to adjust the
value.
or
0 to 100
0 to 63
Not applicable to a digital input signal.
Picture menu
1. Press the MENU key to display the main menu.
2. Press the
3. Press the
4. Press the or keys to make adjustments or selections.
5. To return to the previous menu, press the MENU button.
or keys to select PICTURE and then press the ENTER key to enter the menu.
or keys to move the highlight to a menu item and then press the ENTER key to select that item.
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18.5” LCD Color Monitor BenQ G922HD
Item Function Operation Range
Adjusts the balance between light and
dark shades.
Brightness
The function is not available for
use when Dynamic Contrast is on
Adjusts the degree of difference
between darkness and lightness.
Contrast
The function is not available for
use when Dynamic Contrast is on.
Adjusts the clarity and visibility of the
Sharpness
Color - Press ENTER to enter the Color menu.
edges of the subjects in the image.
Allows video and still photographs
Press the
the brightness and press the
key to decrease the brightness. 0 to 100
Press the
the contrast and press the
key to decrease the contrast.
Press the
the crispness of the display and
press the
softness effect on the display.
key to increase
key to increase
0 to 100
key to improve
1 to 5
key to have
Normal
Bluish
Reddish
User Mode
to be viewed with natural coloring.
This is the factory default color.
Applies a cool tint to the image and
is factory pre-set to the PC industry
standard white color.
Applies a warm tint to the image and
is factory pre-set to the news print
standard white color.
Tailors the image color tint. The
blend of the Red, Green and Blue
primary colors can be altered to
change the color tint of the image.
The default start setting is 50.
Decreasing one or more of the
colors will reduce their respective
influence on the color tint of the
image. e.g. if you reduce the Blue
level the image will gradually take
Press the
this option.
Press the
ENTER key to select Red, Green,
or Blue. Then use Press the
keys to make the color
or
adjustments.
or keys to select
or keys and the
0 to 100
0 to 63
Red (0 to 100)
Green (0 to 100)
Blue (0 to 100)
Reset Color
on a yellowish tint. If you reduce
Green, the image will become a
magenta tint.
Resets the User Mode custom color
settings to the factory defaults.
Press the
the settings.
25
or keys to change
YES
NO
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18.5” LCD Color Monitor BenQ G922HD
Press MENU to leave the Color menu.
The function will increase the level
of contrast to provide sharper and
more detailed image quality.
Dynamic
Contrast
Dynamic Contrast will disable
Brightness and Contrast
controls.
Picture Advanced menu
Activating
Press the ENTER key to select this
option. Press the
change the settings.
or keys to
0 to 5
1. Press the MENU key to display the main menu.
2. Press the
3. Press the
4. Press the or keys to make adjustments or selections.
5. To return to the previous menu, press the MENU button.
Picture Mode
or keys to select PICTURE ADVANCED and then press the ENTER key to enter the menu.
or keys to move the highlight to a menu item and then press the ENTER key to select that item.
Item Function Operation Range
Selects a picture mode that best suits the type
of images shown on the screen.
• Standard - for basic PC application.
• Movie - for viewing videos.
• Dynamics - for viewing landscape-specific
videos and playing games.
• Photo - for viewing still images.
Press the
keys to change the
settings.
or
• Standard
• Movie
• Dynamics
• Photo
• sRGB
• sRGB - for better color matching
representation with the peripheral devices,
such as printers, DSCs, etc.
26
Page 27
18.5” LCD Color Monitor BenQ G922HD
Displays the preview of screen images under
Senseye Demo
(available when the
Picture Mode is set
to Photo, Dynamics,
or Movie)
Display Mode
the selected mode from
Picture Mode. The screen will be divided into
two windows; the left window demonstrates
images of Standard mode, while the right
window presents the images under the
specified mode.
This feature is provided to allow aspect ratio’s
other than 16:9 to be displayed without
geometric distortion.
• Full - Scales the input image to fill the screen.
Ideal for 16:9 aspect images.
• Aspect - The input image is displayed without
geometric distortion filling as much of the
display as possible.
Aspect is not available when the video
content is in a 16:9 aspect ratio.
Press the
keys to change the
settings.
Press the
keys to change the
settings.
or
or
• ON
• OFF
• Full
• Aspect
System menu
1. Press the MENU key to display the main menu.
2. Press the
3. Press the
4. Press the or keys to make adjustments or selections.
5. To return to the previous menu, press the MENU button
or keys to select SYSTEM and then press the ENTER key to enter the menu.
or keys to move the highlight to a menu item and then press the ENTER key to select that item.
27
Page 28
18.5” LCD Color Monitor BenQ G922HD
Item Function Operation Range
Selects the D-sub (analog) input.
Use this to change the input to
that appropriate to your video
Input
OSD Settings - Press ENTER to enter the OSD Settings menu.
Language
cable connection type.
Analog-only models do not
have the Input function.
Sets the OSD menu Language.
Press the
the settings.
Press the
the settings.
The language options
displayed on your OSD may
differ from those shown on
or keys to change
or keys to change
• D-sub
• DVI
• English
• French
• German
• Italian
• Spanish
• Polish/
Japanese
• Czech/
Traditional
Chinese
• Hungarian/
H. Position
V. Position
Display Time
Adjusts the horizontal position of
the OSD menu.
Adjusts the vertical position of
the OSD menu.
Adjusts the display the OSD
menu.
the right, depending on the
product supplied in your
region.
Press the
the settings.
or keys to change
Simplified
Chinese
• Serbo-Croatian
• Romanian
• Dutch
• Russian
• Swedish
• Portuguese
0 to 100
0 to 100
• 5 Sec.
• 10 Sec.
• 15 Sec.
• 20 Sec.
• 25 Sec.
• 30 Sec.
28
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18.5” LCD Color Monitor BenQ G922HD
Prevents all the monitor settings
from being accidentally changed.
OSD Lock
Press MENU to leave the OSD Settings menu.
DDC/CI*
When this function is activated,
the OSD controls and hotkey
operations will be disabled.
Allows the monitor settings to be
set through the software on the
PC.
Press the
the settings.
To unlock the OSD controls
when the OSD is preset to
be locked, press and hold
the "MENU" key for 15
seconds to enter the "OSD
Lock" option and make
changes.
Alternatively, you may use
the
"NO" in the "OSD Lock"
submenu from the "OSD
Settings" menu, and all OSD
controls will be accessible.
Press the ENTER key to select
this option.
Press the
the settings.
or keys to change
or keys to select
or keys to change
• YES
• NO
• ON
• OFF
When this function is activated,
HDMI port will be in the input
HDMI Auto
auto select loop. Otherwise,
Switch
HDMI can only be selected by
input select or by hot key.
Displays the current monitor
Information
property settings.
Resets all mode, color and
geometry settings to the factory
Reset All
default values.
*DDC/CI, short for Display Data Channel/Command Interface, which was developed by Video Electronics Standards
Association (VESA). DDC/CI capability allows monitor controls to be sent via the software for remote diagnostics.
Press the ENTER key to select
this option.
Press the
the settings.
Press the ENTER key to select
this option.
Press the
the settings.
or keys to change
or keys to change
• ON
• OFF
• YES
• NO
29
Page 30
18.5” LCD Color Monitor BenQ G922HD
Display Timing Table
Pixel Format Horz-f(kHz) Horz -p Vert-f (Hz) Vert -P Pixel Clk (MHz) Source
640 x 480 31.47 - 59.94 - 25.175 VGA
640 x 480 37.50 - 75.00 - 31.500 VGA
720 x 400 31.47 - 70.08 + 28.321 VGA
800 x 600 37.88 + 60.32 + 40.000 VESA
800 x 600 46.88 + 75.00 + 49.500 VESA
832 x 624 49.72 - 74.55 - 57.283 MAC
1024 x 768 48.36 - 60.00 - 65.000 VESA
1024 x 768 60.02 + 75.03 + 78.750 VESA
1280x720 44.77 - 59.86 + 74.5
1360x768 47.70 + 60.01 + 85.5 VESA
1366x768 47.76 - 59.85 + 85.5
• For the first time using this monitor with the resolution 1360x768, the default Display Mode is Aspect.
• Image disruption may occur as a result of signal frequency differences from graphic cards which do not
correspond with the usual standard. This is not, however, an error. You may improve this situation by altering an
automatic setting or by manually changing the phase setting and the pixel frequency from the “DISPLAY” menu.
• To extend the service life of the product, we recommend that you use your computer's power management
function.
30
Page 31
18.5” LCD Color Monitor BenQ G922HD
Factory OSD Menu
Turn off the monitor, keep pressing the “MENU” buttons, and turn on the monitor, then when we press the MENU
button, the factory OSD will be at the left top of the panel as below.
BenQ Service Page
1. Trigger method: Press “Menu” key and Power on.
2. Press the Menu key will display the service page
3. Press menu key will close the service page.
4. Power off will quit the service mode
5. At the service mode, the key function is same as normal OSD define.
6. The timer can only reset at the service mode by “Timer Reset”. And need to have a warning message to double
confirm the reset function. The timer should record up to 99999 hours.
7. Add one select item for DVI port, Mode 1, Mode 2 at service menu
Mode 1: To enable the hot plug pin detection. (HDMI port default)
Mode 2: To disable the hot plug pin detection. (DVI port default)
8. Add BenQ logo on/off item, the default is “on”
9. add the auto power on item, the default is “off ”
10. Add the timer reset warning message, when select the timer reset item, then the warning message will display
and need to confirm it again and the default is “No”.
11. Panel type define need to have the panel version
12. F/W version need to define the dual or analog model.
31
Page 32
18.5” LCD Color Monitor BenQ G922HD
Level 2 Circuit Board and Standard Parts Replacement
Product Exploded View
NO PART NO QTY UNIT DESCRIPTION
ME
1 Q34G0543ADPC1B0101 1 PCS BEZEL(L185W-9BENQ)
2 Q33G0288 2 1C0100 1 PCS LENS
3 Q33G0287ADP 1L0100 1 PCS KEYPAD
4 Q15G0405201 1 PCS MAINFRAME
5 Q34G0544ADP 2B0130 1 PCS REAR COVER18.5"
6 Q33G0289ADPA1L0100 1 PCS LOGO COVER
7 Q34G0545ADP 1B0100 1 PCS STAND FRONT
8 Q37G0125011 1 PCS HINGE
9 Q34G0546ADP 1B0130 1 PCS STAND BACK
10 A33G0251ADP 2L0100 1 PCS CABLE CLIP
11 Q34G0547ADP 1B0133 1 PCS BASE
12 Q12G6082 1 5 PCS FOOT PAD
13 Q23G3178881 1A 1 PCS LOGO
14 P15G8299 3 4 PCS BKT-VESA
32
Page 33
18.5” LCD Color Monitor BenQ G922HD
SCREW
1 0M1G 130 6120 4 PCS PANEL & MAINFRAME
2 0M1G1730 6120 4 PCS PCB & MAINFRAME
3 AQ1G1740 12120 2 PCS HINGE & STAND
4 0M1G1740 8 47 CR3 1 PCS HINGE & STAND
5 AM1G1740 12 47 CR3 2 PCS HINGE & STAND & MF
ART.
1 Q44G8015101 1 PCS EPS-L
2 Q44G8015201 1 PCS EPS-R
3 Q44G8015201 1 PCS 18.5 LCD BENQ CARTON
EE
1 756GQ9CB RH104 1 PCS MAIN BOARD
2 PWPC8521VYD5 1 PCS POWER BOARD
3 KEPC8QJ3 1 PCS KEYBOARD
Six angles’ view
33
Page 34
18.5” LCD Color Monitor BenQ G922HD
Product Disassembly
1). Remove the stand-base ASS’Y
Place the monitor face down on a smooth surface. Be careful to avoid scratch and injury during the process of
uninstall. And then remove the two screws as below to remove the stand-base ASS’Y.
2). Remove the Bezel
Remove the bezel as follow:
Fig1
34
Page 35
18.5” LCD Color Monitor BenQ G922HD
3). Remove the rear cover
4).Remove the Panel
Disconnect the Lamp Connections and LVDS Cable connection.
35
Page 36
18.5” LCD Color Monitor BenQ G922HD
5).Remove the Main Board and Power Board
Remove the screws in red and disconnect the all connections in blue, at last you can get the Main Board and
Power Board as follow.
36
Page 37
18.5” LCD Color Monitor BenQ G922HD
MAIN BOARD
POWER BOARD
37
Page 38
18.5” LCD Color Monitor BenQ G922HD
Block Diagram
Main Board
MCU RTD2122L-LF
Key Control Interface
(CN202)
Crystal
24MHZ
(X401)
(U401)
Panel Interface
(CN601)
Scalar RTD2545LH-GR
H sync
V sync
RGB
D-Sub Connector
(CN301)
(U501)
RXN/P
RXCN/P
SCL/SDA
DVI Connector
(CN302)
38
Page 39
18.5” LCD Color Monitor BenQ G922HD
Power Board
AC input
EMI filter
Start Resistor
R904, R932
PWM Control
Output Circuit
Bridge Rectifier
and Filter
(IC901)
Transformer
(T801)
Transformer
Power Switch
(Q901)
Photocoupler
(IC903)
MOSFET
(Q802)
12V
Rectifier diodes
5V
Feedback Circuit
12V
Lamp
Feedback
Circuit
ON/OFF
PWM Control
(IC801)
39
DIM
Page 40
18.5” LCD Color Monitor BenQ G922HD
Schematic Diagram
Main Board
CN201
CONN
1
2
3
4
5
6
7
8
9
CMVCC
CMVCC
BKLT-VBRI
BKLT-EN
C_PANEL_INDEX
Volume#
Mute
CMVCC
DIM# {4}
PANEL_ID# {4}
Volume# {4}
Mute {4}
Back light
Dimming(0.5V~3V)
Panel ID(0.5V~3V)
CMVCC
120Ω
FB201
C202
MVC C
+
0.1uF/ 16V
C204
FB202
NC/ 120OHM
U201
AP1117E33LA
* BKLT-EN Hi gh O N(3.3V )
23
VOUTVIN
VSS
1
BKLT-EN
C205
0.1uF/16V
+
R201
200Ω 1/16W
C206
0.1uF/ 16V
C203
VCC3
VCC3
R202
4K7 1/16W
Q202
MMBT390 4
INV_ON# {4}
CN202
CONN
1
2
3
4
5
6
ZD202
NC/UDZSNP5.6B
0.1uF/ 16V
1 2
Near to Connect
ZD203
C209
NC/UDZSNP5.6B
1 2
C201
0.1uF/ 16V
ZD201
NC/UDZSNP5.6B
1 2
C210
0.1uF/16V
KEY0
KEY1
POWER_K EY#
LED_G
LED_R
VCC3
R208
120R 1/ 16W
23
Q204
R210
1
MMBT390 6
OEM MOD EL Size
TPV MOD EL
PCB NAME
10K 1/16W
23
Q205
1
R213 10K 1/16W
MMBT3906
BenQ G920HD
CBPCRRHBFQ1 1.2
715G3327-1A
26
Sheet
LED_R# {4}
LED_G# {4}
of
Rev
称爹
B
<
称爹
>
KEY0 {4}
KEY1
{4}
POWER_KE Y# {4 }
T P V ( Top Victory Electronics Co . , Ltd. )
絬 隔 瓜 絪 腹
Key Component
Date
G3327-1A-X-X-5-090108
2.POWER
Thursday , January 08, 2009
R207
120R 1/16W
LED_R
LED_G
40
Page 41
18.5” LCD Color Monitor BenQ G922HD
CN302
JACK
DDC1_SCL{4}
DSUB_V
DSUB_H
DDC1_SDA{4}
VSYN C
SYNC GND
DDC SCL
DDC SDA
1/3shield
2/4shield
0/5shield
clk shield
DAT0+
DAT0-
DAT1+
DAT1-
DAT2+
DAT2-
DAT3+
DAT3-
DAT4+
DAT4-
DAT5+
DAT5-
GND
GND
26
25
DSUB_V {4}
H_Sync
V_Sync
VGA_G+
VGA_R+
8
15
6
R441100R 1/10W 5%
7
R440100R 1/10W 5%
14
+5V
16
HOT_PLUG
HPD
11
3
19
22
18
17
10
9
2
1
13
12
5
4
21
20
23
clk+
24
clk-
DDC1-SCL
R426 22R 1/10W 5%
R328 100R 1/10W 5%
R329 100R 1/10W 5%
DDC1-SDA
R428 22R 1/10W 5%
R332
200R 1/10W 5%
R330 200R 1 /10W 5%
150 OHM
FB304
U103
1
2
3 4
AZC199 -04S
I/O1
I/O4
GND
VDD
I/O2 I/O3
1
2
3 4
R301 100R 1 /16W
R303 100R 1 /16W
R304
R305
2K2 1/16W
2K2 1/16W
15
14
13
12
11
6
5
R331
200R 1/1 0W 5%
R317 100R 1/16W
ZD306
NC
1 2
U107
AZC199-04S
6
I/O1
I/O4
5
GND
VDD
I/O2 I/O3
17 16
CN301
DB15
VGA_B+
C302
33pF
10
5
9
4
8
3
7
2
6
1
ESD_VC C
DVI_5V
ESD_VCC2
C303
33pF
VGA_CON
DSUB_5V
VGA_BVGA_B+
VGA_GVGA_G+
VGA_RVGA_R+
DDC1_SCL
DDC1_SDA
C101
0.1uF/16V
DVII_DETECT {4}
R316 10K 1/ 16W
C316
0.1uF/16V
1
2
C120
3 4
0.1uF/16V
RTD_H {5}
RTD_V {5}
C414
0.1uF /16V
U105
AZC199-04S
I/O1
I/O4
GND
VDD
I/O2 I/O3
DSUB_5V
ZD304
RLZ5.6B
1 2
U104
1
I/O1
2
GND
3 4
I/O2 I/O3
AZC199-04S
ESD_VCC1
6
5
R311
100R 1/1 6W
C415
I/O4
VDD
C121
0.1uF/16V
0.1uF /16V
H_Sync
6
5
V_Sync
U106
AZC199-04S
1
2
3 4
DSUB_CONNECT
ZD305
RLZ5.6B
1 2
ESD_VCC
候綼
DDC2_SCL
DDC2_SDA
R318 10R 1/16W
R319 10R 1/16W
R320 10R 1/16W
R321 10R 1/16W
R322 10R 1/16W
R323 10R 1/16W
6
I/O1
I/O4
5
GND
VDD
I/O2 I/O3
{4}
D109
BAT54C
C112
0.1uF/16V
U103
DDC2_SCL {4}
DDC2_SDA {4}
R324 10R 1/16W
R325 10R 1/16W
ESD_VCC1
C119
0.1uF /16V
MCU_VCC_S
2
RX0P
RX0N
RX1P
RX1N
RX2P
RX2N
FB108
300 OHM
1
3
RX0P {5}
RX0N {5}
RX1P {5}
RX1N {5}
RX2P {5}
RX2N {5}
ESD_VCC
RXCP
RXCN
VGA_B+
VGA_B-
VGA_G+
VGA_G-
VGA_R+
VGA_R-
FB302
1 2
19R BEAD
FB301
1 2
19R BEAD
FB303
1 2
19R BEAD
RXCP {5}
RXCN {5}
R307
75R 1/10W 5%
R310
75R 1/10W 5%
R314
75R 1/10W 5%
R326
100K 1/16W 5%
Q301
MMBT3904
R327
4K7 1/16W
R306 100R 1/ 16W
C305
5pF/50V
R308 100R 1/ 16W
R309 100R 1/ 16W
C308
5pF/50V
R312 100R 1/ 16W
R313 100R 1/ 16W
C310
5pF/50V
R315 100R 1/ 16W
C304
0.047uF
C306
0.047uF
C307
0.047uF
C309
0.047uF
C301
0.047uF
C311
0.047uF
HPD_CTL
RTD_B+
RTD_B-
RTD_G+
RTD_G-
RTD_R+
RTD_R-
RTD_B+ {5}
RTD_B- {5}
RTD_G+ {5}
RTD_G- {5}
RTD_R+ {5}
RTD_R- {5}
GND POWER
DGND
ESD_VCC2
FB109
300 OHM
ESD_VCC1
T P V ( Top Victory Electronics Co . , Ltd. )
絬 隔 瓜 絪 腹
Key Component
G3327-1A-X-X-5-090108
Date
3.INPU T
Thursday , January 08, 2009
OEM MO DE L S ize
TPV MOD EL
PCB NAME
BenQ G920HD
CBPCRRHBFQ1 1.2
715G3327-1A
Sheet
36
of
Rev
称爹
G2507-H-K-X-2-070618
41
B
称爹
>
<
Page 42
18.5” LCD Color Monitor BenQ G922HD
{3}
CMVCC
PANEL_ID#{2}
PPWR_ON #{6}
DDC2_SCL{3}
DDC2_SDA
DDC1_SCL{3}
DDC1_SDA{3}
DSUB_5V
D403
LL4148
Volume#{2}
INV_ON#{2}
150 OHM
FB401
D402
BAV70
MCU_VCC_S MCU_V CC
MCU_VCC_S
C402
R402
1K 1/16W
NC
AZ431AN-AE1
Volume#
Mut e
Mut e{2}
PANEL_ID # R423 NC
DIM#
DIM#{2}
PPWR_ON #
INV_ON#
DDC2_SCL
DDC2_SDA
DDC1_SCL
DDC1_SDA
DVII _DETECT{3}
{3}
PANEL_VCC
DVI_5V
U402
R420 NC
R422 NC
R424 1K 1/ 16W
R430 100R 1/ 16W
R432 100R 1/ 16W
HPD_CTL
LED_G#{2}
LED_R#{2}
R442 100R 1/ 16W
LED_G# R434 100R 1/ 16W
LED_R#
R415
6K8 1/16W
CMVCC
2
Q401
MMBT3904
D401
1
NC
3
R403
3.9KΩ 1/ 16W
R404
10K 1/16W
R454
R416
10K 1/16W 5%
NC
VCC3
R453
C412
1uF 10V
1K 1/16W
MCU_VCC_S
R445 4K7 1/16W
R451
4K7 1/16W
C403
0.1uF/16V
Closed to X'tal
MCU_VCC_SMCU_VCC_S
R443 4K7 1/16W
R444 4K7 1/16W
C405
+
10UF5 0V
R4134K7 1/16W
R4144K7 1/16W
44
P5.0/PW M0
45
P5.1/PW M1
46
P5.2/PW M2
47
P5.3/PW M3
48
P5.4/PW M4
1
P5.5/PW M5
2
DSCL2/P5.6
3
DSDA2/ P5.7
5
ASCL1/P3.0/ RXD
8
ASDA1/P3. 1/TXD
9
P3.2/I NT0
10
P3.3/I NT1
11
P3.4/T0
12
P3.5/T1
13
P7.6/C LKO2
14
P7.7
U401 RTD2122L-LF
24mhz
1 2
6K8 1/16W
C401
10pF
Closed to MCU
X40 1
R439
3
1
BAT54C
C406
0.1uF/16V
4
15
C411
10pF
2
MCU _VC C
41
RST
VCC
RTD2122L
VSS
XO
XI
17
16
40393837363534
P1.1
P1.2
P1.0/T2
NC
NC
NC
6
7
19
18
4K7 1/16W
P1.3
P1.4
P6.6/CLKO1
NC
42
MCU _VC C
R411
33
P1.5
P1.6
P1.7
VSYNC
P6.3/AD C3
P6.2/AD C2
P6.1/AD C1
P6.0/AD C0
NC
NC
43
P6.7
P6.5
P6.4
NC
NC
NC
NC
R412
4K7 1/16W
IICSDA
IICSCL
WP
RTD_SD3/SDI
RTD_SCLK
32
31
30
29
28
27
26
25
24
23
22
21
20
RTD_SD3/SDI {5}
RTD_SCLK {5}
C409
NC/10pF
MCU _VC C
R425
10K 1/16W
DSUB_V1
MCU _VC C
R427 NC /1K 1/16W 5%
R429 0R05 1/ 16W
R433 100R 1/ 16W
R435 100R 1/ 16W
R437
絬 隔 瓜 絪 腹
Key Component
R401
3.9K OHM +-1% 1/16W
T P V ( Top Victory Electronics Co . , Ltd. )
G3327-1A-X-X-5-090108
4.MCU/R TD2122L
Date
Monday, F ebruary 09, 2009
DSUB_V
CRYSTAR_OUT
DSUB_CONNECT
POWER_KEY #
POWER_KEY #
KEY1
KEY0
R438
3.9K OHM +-1% 1/16W
1
2
3
4 5
3.9K OHM +-1% 1/16W
POWER_KE Y# {2}
KEY1 {2}
KEY0 {2}
MCU _VC C
C404
NC
U403
8
NC
VCC
7
NC
WC
6
NC
SCL
VSS SDA
NC/ M24C 16
DSUB_V {3}
CRYSTAR_OUT {5}
DSUB_CONNECT {3}
R436
10K 1/16W
OEM MO DE L Size
TPV MODEL
PCB NAME
Sheet
R405
C410
0.1uF/ 16V
BenQ G920HD
CBPCRRHBF Q1 1.2
715G3327-1A
46
R407
R406
4K7 1/16W 5%
NC/ 4K7 1/16W 5%
NC/ 4K7 1/16W 5%
R408 NC
R409 NC
R410 NC
R431
6K8 1/16W
of
MVC C
WP
IICSCL
IICSDA
Rev
称爹
B
称爹
>
<
42
Page 43
18.5” LCD Color Monitor BenQ G922HD
VCC3
R507 3.3Ω 2W
Q501
KN2907AS
DDC2_SDA{4}
DDC2_SCL{4}
BJT_B
Q502
KN2907AS
0.1uF/ 16V
R508 100R 1/ 16W
R509 100R 1/ 16W
For HDCP
C502
1.8AVCC
120Ω
FB503
R1.8DVCC
C505
22UF50V
VCC3
RTD_DDCSDA
RTD_DDCSCL
+
0.1uF/ 16V
FB502
120Ω
C506
DGND
C501
1uF 10V
TMDS_VDD
150 OHM
FB501
C503
0.1uF/ 16V
R1.8DVCC1
C507
1uF 10V
{4}
{3}
{3}
TMDS_VDD
RX2P
RX2N
RX2N
R503
1K 1/16W
DGND
U501
VCC3
RX1P
RX1P{3}
RX1N
RX1N{3}
RX0P
RX0P{3}
RX0N
RX0N{3}
RXCP LVDS_E9
RXCP{3}
RXCN
RXCN{3}
RTD_V
RTD_V{3}
RTD_H
RTD_H{3}
RTD_B-{3}
RTD_B+{3}
RTD_B-
RTD_B+
4847464544434241403938
V0/RX2N
1
V1/REXT
2
V2/RX1P
3
V3/RX1N
4
V4/RX0P
5
V5/RX0N
6
V6/RXCP
7
V7/RXCN
8
AVS
9
AHS
10
ADC_GND
11
B-
12
B+
G-G+R-R+ADC_VD D
1314151617181920212223
CRYST AR_OUT
RX2P
TMDS_VDD
CRYST AR_OUT
XIN
VCLK/R X2P
TMDS_VDD
RTD_DDCSCL
DDCSCL/PWM0
RTD2545LH-GR
{4}
{4}
RTD_SD3/SDI
RTD_SCLK
LVDS_O0
LVDS_O1
RXO0-
RXO0+
DGND
R1.8DVCC1
RTD_SCLK
RTD_DDCSDA
37
SCL
SDA
VCCK
PGND
TXO0-
TXO0+
RXO1-
36
TXO1-
35
RXO1+
34
RXO2-
33
RXO2+
RXOC-
32
RXOC+
31
30
RXO3-
RXO3+
29
28
RXE0-
27
RXE0+
26
RXE1-
25
RXE1+
TXE3-
TXE2+
TXO1+
TXO2-
TXO2+
TXOC-
TXOC+
TXO3-
TXO3+
TXE0-
TXE0+
TXE1-
TXE1+
TXE2-
24
DDCSDA/PWM1/IRQ
BJT_B
VCCK
PGND
TXE3+
RXOCRXOC+
LVDS_O2
LVDS_O3
LVDS_O4
LVDS_O5
LVDS_O6
LVDS_O7
LVDS_O8
LVDS_O9
LVDS_E0
LVDS_E1
LVDS_E2
LVDS_E3
LVDS_E4
LVDS_E5
LVDS_E6
LVDS_E7
LVDS_E8
RXO0RXO0+
RXO1RXO1+
RXO2RXO2+
RXOCRXOC+
RXO3RXO3+
RXE0RXE0+
RXE1RXE1+
RXE2RXE2+
RXECRXEC+
RXE3RXE3+
LVDS_O[0. .9] {6}
LVDS_E[0. .9] {6}
RTD_G+
RTD_R-
RTD_G-
RTD_G-{3}
RTD_G+{3}
RTD_R-{3}
RTD_R+{3}
BJT_B
RTD_R+
R1.8DVCC
R1.8DVCC
R1.8DVCC
T P V ( Top Victory Electronics Co . , Ltd. )
絬 隔 瓜 絪 腹
Key Component
Date
RXE3-
DGND RTD_SD3/SDI
RXE2+
RXE3+
G3327-1A-X-X-5- 090108
5.RTD2525L
Friday , February 13, 2009
RXE2-
OEM MO DE L Size
TPV MODEL
PCB NAME
BenQ G920HD
CBPCRRHBFQ1 1.2
715G3327-1A
56
Sheet
of
Rev
称爹
B
<
称爹
>
43
Page 44
18.5” LCD Color Monitor BenQ G922HD
Power Board
R918
1000pF
R900
680K OHM 1/4W
12
NR901
NTCR
!
t
!
2
BD901
KBP208G
C902
!
+
C904
0.22uF/ 275V
!
2
1
!
C908
0.22uF/ 275V
R902
680K OHM 1/4W
VAR901
Varistor
12
N.C
NR901(NC)
NTCR
t
3
CN901
SOCKET
87G 501 32 DL
1
-
4
!
3
4
C901
1000pF
L901
30mH
12
3
!
!
!
!
R901
680K OHM 1/4W
!
!
!
100K OHM 1% 1/8W
!
F901
FUSE
+
C907
100uF450V
C938
NC
C911
0.1uF
IC901
1
RT
2
COMP
3
CS
4 5
GNDOUT
R915
C928
0.01uF
HEAT SINK(Q901_Q 90G6263-6)
LD7575A PS
GND1
GND
1
2
HS2
HEAT SINK(D 906_Q90G6263-6)
1
2
HS3
1
2
R904
10K OHM 1/4W
R932
10K OHM 1/4W
8
HV
7
NC
6
VCC
R905
NC
R906
NC
R907
NC
D903
LL4148
R910
10R 1/4W
ZD905
RLZ18B
R912
220 OHM 1/4W
C909
470pF/25V
HS5
SHIELD (H85G0002-1)
1
2
+
D901
FR103
C903
22uF/50V
1 2
C906
1500pF2KV
R938
10K 1/8W
R908
100KOHM +-5% 2WS
D900
FR107
R909
5.1 OHM 1/4W
!
Q901
2SK2645-54MR
R914
0.47 OHM +-5% 2WS
4
5
6
2
1
!
C900
3300pF 250V
!
T901
POWER X'FMR
43
9
10
7
8
11
12
12
IC902
PC123X2YFZ OF
IC903
AZ431AZ-AE1
100 OHM 1/4W
R919
100 OHM 1/4W
R920
100 OHM 1/4W
R921
R922
R923 N C
R961 100 OHM 1/4W
R962 100 OHM 1/4W
R935 100 OHM 1/4W
C924
0.1uF
C912
0.001uF
2
1
3
D906
FCH 10U10
D907 NC
NC
NC
D905 31DQ06F C3
C929
0.001uF
R925
1K 1/8W
R926
1K 1/10W 1%
C925
NC
C917
680uF/25V
C910
NC
+
+
+
C940
1000UF25V
+
C918
680uF/25V
C939
NC
L905
NC
NC
L904
1.0uH
+
C921
+
R948
NC
Q904
NC
L903
1.0uH
R924
150R 1/8W
ZD922
RLZ5.1B
D916
LL4148
R942
1K 1/10W 1%
2.43K OHM 1% 1/10W
R930
C922
470PF50V
NC
1 2
ZD923
1 2
R947
NC
R952
NC
1 2
R927
3.6K OHM 1% 1/10W
ZD921
RLZ13B
D915
LL4148
ON/OFF
MUTE
DIM
VOL
+5V
R940
33K 1/10W
R946
150 OHM 2W
Q903
PMBS3904
C932
C915
470uF/16V
C931
0.1uF
0.001uF
+
1 2
R943
470R 1/8W
R939
1K 1/8W
NC
ZD902
RLZ13B
F902
NC
F904
F903
NC
F905
0 OHM 1/4W
C930
0.1uF
10
+12V
+5V1
+5V
CN902
1
2
3
4
5
6
7
8
9
CONN
44
Page 45
18.5” LCD Color Monitor BenQ G922HD
1
2
CONN
CN801
2
1
1
2
CONN
CN802
2
1
ON/OFF
C839
1500PF/50V
R855
+12V
DIM
F801
0 OHM 1/4W
Q805
PDTC144WK
C807
0.1uF/25V
R804
100R 1/8W
Q808
PDTA144WK
C825
0.1uF/25 V
PMBS3904
Q804
PMBS3906
C802
470PF50V
Q801
23
1
Q811
PMBS3904
D810
NC
R839
22R 1/8W
D811
NC
+
C824
0.1uF
Q802
AM9945N-T1-PF
1
S
D
2
G
D
3
S
D
4
G
D
15R 1/4W
R856
15R 1/4W
8
C838
7
1500PF/50V
6
5
6
3
4
T801
POWER X'FMR
R817
7
C801
30pF/3KV
81
C803
30pF/3KV
D807
LL4148
D805
LL4148
C819
0.0022uF
C823
0.0022uF
10K 1/10W 1%
R828
10K 1/10W 1%
R821
1K 1/8W
3
R801
1K5 1/10W 1%
R822
1K 1/8W
3
R814
1K5 1/10W 1%
D801
BAV99
D802
BAV99
D817
LL4148
6K8 1/10W
10K 1/10W 1%
R827
1K 1/10W 1%
R851
R830
NC
R820
R802
8.2K 1/10W 1%
C822
1uF/25V
D812
LL4148
10K 1/10W 1%
Q806
PMBS3904
C842
0.01uF
R863
C835
NC
R832
10K 1/10W 1%
R831
1K 1/8W
R823
0R05 1/10W 5%
C821
0.1uF/25V
51K OHM 1% 1/8W
R810
C820
220pF50V
PMBS3906
R865
NC
新增
Q812
1
R853
68K 1/10W
R861
NC
Q807
N.C
23
R864
NC
穝糤
C817
NC
R850
22R 1/8W
R841
68K OHM 1% 1/10W
R829
22R 1/8W
R825
22R 1/8W
TL494IDR
IC801
1
1IN+
2
1IN-
3
FEEDBACK
4
DTC
OUTPUT CTRL
5
CT
6
RT
7
GND
8 9
C1 E1
R854
NC
R837
47K 1/8W
R807
R824
1K 1/10W 1%
10K 1/10W 1%
R808
10K 1/10W 1%
C845
2.2uF/16V
R862
1M 1/10W 5%
R803
680K 1/10W
D814
LL4148
C846
NC
R818
1K 1/10W 1%
Q809
RK7002
C834
0.1uF/25V
D806
LL4148
R835
1M 1/10W 5%
16
2IN+
15
2IN-
14
REF
13
12
VCC
11
C2
10
E2
R826
1K 1/8W
45
Page 46
18.5” LCD Color Monitor BenQ G922HD
Key Board
A
B
C
D
E
C002
C002
NC/0.001uF
NC/0.001uF
LED_RED#
LED001
LED001
C003
C003
NC/0.001uF
NC/0.001uF
4 4
CN001
CN001
7
CONN
CONN
LBADC1
1
LBADC2
2
DC_POWERON
3
LED_GRN#
4
LED_RED#
5
6
8
3 3
GND
2 2
C001
C001
NC/0.001uF
NC/0.001uF
LED
LED
1
LED_GRN#
3
2
C004
C004
NC/0.001uF
NC/0.001uF
C005
C005
NC/0.001uF
NC/0.001uF
R003 1K 1/10W 1%
R003 1K 1/10W 1%
R002 3K 1/10W
R002 3K 1/10W
R006 1K 1/10W 1%
R006 1K 1/10W 1%
R007 3K 1/10W
R007 3K 1/10W
R004 1K 1/10W 1%
R004 1K 1/10W 1%
R005 3K 1/10W
R005 3K 1/10W
SW006
SW006
1
2
5
SW006
SW006
4
3
NC
NC
GND
GND
C0110.1uF
C0110.1uF
ZD006
ZD006
ǂ
ǂ
ǂ
ǂ
ǂ
ǂ
LEFT
SW003
SW003
1
2
5
SW003
SW003
ZD003NC
ZD003NC
3
GND
GND
C0080.1uF
C0080.1uF
4
ZD004NC
ZD004NC
GND
SW002
SW002
1
3
MENU
2
5
SW002
SW002
4
GND
AUTO
SW001
SW001
1
2
5
SW001
SW001
ZD001NC
ZD001NC
C0060.1uF
C0060.1uF
4
3
ZD005NC
ZD005NC
GND
SW004
SW004
1
3
RIGHT
2
5
SW004
SW004
4
GND
C0100.1uF
C0100.1uF
POWER
ENTER
SW005
SW005
1
2
5
SW005
SW005
ZD002NC
ZD002NC
C0070.1uF
C0070.1uF
3
GND
GND
C0090.1uF
C0090.1uF
4
GND
RIGHT
LBADC1
1 1
(MENU) (RIGHT)
(LEFT)
(Power)(AUTO)
LBADC2
(ENTER)
LBADC3
ENTER
MENU
AUTO
(1.0K)
(3.0K)
(1.8K)
(3.0K)
(1.8K)
(3.0K)POWER
A
B
0.673V
1.435V
0.673V
1.435V
0.673VLEFT
1.435V
C
T P V ( Top Victory Electronics Co . , Ltd. )
T P V ( Top Victory Electronics Co . , Ltd. )
T P V ( Top Victory Electronics Co . , Ltd. )
㍀䱨⪰㌾㝍
㍀䱨⪰㌾㝍
㍀䱨⪰㌾㝍
Key Component
Key Component
Key Component
Date
Date
Date
G3367-E-X-X-2-081223
G3367-E-X-X-2-081223
G3367-E-X-X-2-081223
OEM MODEL
OEM MODEL
OEM MODEL
G920HD(A)
G920HD(A)
G920HD(A)
TPV MODEL
TPV MODEL
TPV MODEL
715G3367-E
715G3367-E
PCB NAME
715G3367-E
PCB NAME
PCB NAME
D
Sheet
Sheet
Sheet
22Thursday, December 04, 2008
22Thursday, December 04, 2008
of
22Thursday, December 04, 2008
of
of
GND
Size
Size
Size
B
Rev
Rev
Rev
C
C
C
<
<
⿄⠍
>02.KEY BOARD
⿄⠍
>02.KEY BOARD
<
⿄⠍
⿄⠍
⿄⠍
⿄⠍
E
>02.KEY BOARD
46
Page 47
18.5” LCD Color Monitor BenQ G922HD
Troubleshooting Guide
Equipments and Tools Requirement
1. Voltmeter.
2. Oscilloscope.
3. Pattern Generator.
4. DDC Tool with and Compatible Computer.
5. Alignment Tool.
6. LCD Color Analyzer.
7. Service Manual.
8. User Manual.
Frequently asked questions (FAQ)
The image is blurred:
Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct
resolution, refresh rate and make adjustments based on these instructions.
How do you use a VGA extension cable?
Remove the extension cable for the test. Is the image now in focus? If not, optimize the image by working
through the instructions in the "Adjusting the refresh rate" section on the link "Adjusting the Screen
Resolution". It is normal for blurring to occur due to conduction losses in extension cables. You can minimize
these losses by using an extension cable with better conduction quality or with a built-in booster.
Does the blurring only occur at resolutions lower than the native (maximum) resolution?
Read the instructions on the link "Adjusting the Screen Resolution" on the CD. Select the native resolution.
Pixel errors can be seen:
One of several pixels is permanently black, one or more pixels are permanently white, one or more pixels are
permanently red, green, blue or another color.
• Clean the LCD screen.
• Cycle power on-off.
These pixels are permanently on or off and that is a natural defect occurs in LCD technology.
The image has a faulty coloration:
It has a yellow, blue or pink appearance.
Select MENU > PICTURE > Color > Reset Color, and then choose “YES” in the “Caution” message box to
reset the color settings to the factory defaults.
If the image is still not correct and the OSD also has faulty coloration, this means one of the three primary
colors is missing in the signal input. Now check the signal cable connectors. If any pin is bent or broken off,
please contact your dealer to get necessary support.
No image can be seen:
Is the prompt on the display illuminated in green?
If the LED is illuminated in green and there is a message “Out of Range” on the screen, this means you are
using a display mode that this monitor does not support, please change the setting to one of the supported
mode. Please read the “Preset display modes” section from the link "Adjusting the Screen Resolution".
47
Page 48
18.5” LCD Color Monitor BenQ G922HD
Faint shadow from the static image displayed is visible on the screen:
• Activate the power management function to let your computer and monitor go into a low power "sleep" mode
when not actively in use.
• Use a screensaver to prevent the occurrence of image retention.
Is the prompt on the display illuminated in orange?
If the LED is illuminated in orange, the power management mode is active. Press any button on the computer
keyboard or move the mouse. If that does not help, check the signal cable connectors. If any pin is bent or
broken off, please contact your dealer to get necessary support.
Is the prompt on the display not illuminated at all?
Check the power supply mains socket, the external power supply and the mains switch.
The image is distorted, flashes or flickers:
Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct
resolution, refresh rate and make adjustments based on these instructions.
You are running the monitor at its native resolution, but the image is still distorted.
Images from different input sources may appear distorted or stretched on the monitor running at its native
resolution. To have the optimal display performance of each type of input sources, you can use the "Display
Mode" function to set a proper aspect ratio for the input sources.
The image is displaced in one direction:
Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct
resolution, refresh rate and make adjustments based on these instructions.
The OSD controls are inaccessible:
• To unlock the OSD controls when the OSD is preset to be locked, press and hold the “MENU” key for 15
seconds to enter the “OSD Lock” option and make changes.
• Alternatively, you may use the
Settings” menu (under SYSTEM), and all OSD controls will be accessible.
If your problems remain after checking this manual, please contact your place of purchase or e-mail us at:
Support@BenQ.com
or keys to select “NO” in the “OSD Lock” submenu from the “OSD
48
Page 49
18.5” LCD Color Monitor BenQ G922HD
p
Main Board
(1) No Power
No power
Press power key and look if the
picture is normal
NG
Please reinsert and make sure the
AC of 100-240 is normal
OK
Check if the Pin 3, 4 of CN201 is 5V input
OK
Measure U201 Pin2=3.3V
OK
Check if X401 oscillate waveforms are normal
OK
NG
NG
NG
NG
Reinsert or check the
ower section
Check power board
Replace U201
Replace X401
Check U401
49
Page 50
18.5” LCD Color Monitor BenQ G922HD
(2) No picture
No picture
Check if the Pin 3, 4 of CN201 is 5V input
NG
OK
Measure U201 Pin2=3.3V
Check power board
OK
X401 oscillate waveforms are
normal
OK
Check U401
OK
Check if the sync signal from
computer is output and video cable
is connected normally
NG
NG
NG
NG
Replace U201
Replace X401
Replace U401
Input the sync signal of computer, or
change the cable
50
Page 51
18.5” LCD Color Monitor BenQ G922HD
(3) White screen
White Screen
Check Correspondent
component.
Check Q602, Q601 is broken
or CN601 solder?
Measure Q601 base
is low level?
OK
NG
Replace Panel
NG
Check Correspondent component.
X401 oscillate
waveform is normal
OK
Check U401
OK
Check reset circuit of
U401 is normal
NG
NG
NG
Replace X401
Replace U401
51
Page 52
18.5” LCD Color Monitor BenQ G922HD
Power Board
No power
Check CN902 PIN4.5 = 5V
NG
Check AC line volt 110V or 220V
OK
Check the voltage of C907 (+)
OK
Check start voltage for the pin8 of IC901
OK
NG
NG
NG
Check AC input
Check bridge rectified circuit and F901 circuit
Check R904, R905, Change IC901
Check the auxiliary voltage is bigger than
10V and smaller than 20V
OK
Check IC901 pin5 PWM wave
OK
Check D915/D916/IC902/IC903/ZD902/ZD901
NG
NG
1) Check IC901
2) Check R909/D901/C903 circuit
Check IC901
52
Page 53
18.5” LCD Color Monitor BenQ G922HD
W / LED, No Backlight
Check Inverter input =12V
Check ON/OFF signal
OK
OK
Check IC801 PIN 11=5V
OK
Check IC801 PIN8/PIN9 PWM wave
NG
Check adapter and F801
NG
Check Interface board or main board
NG
Change ON/OFF circuit
OK
Check Q805, Q806 Drain wave
OK
Check the output of T801
OK
Check connecter & lamp, feedback and protect circuit
NG
NG
NG
Check IC801
Change Q805, Q808
Change T801
53
Page 54
18.5” LCD Color Monitor BenQ G922HD
Key Board
Is Key Pad Board connecting normally?
OSD is unstable or not working
Y
Is Button Switch normally?
Y
Is Key Pad Board normally?
Y
N
Connect Key Pad Board
N
Replace Button Switch
N
Replace Key Pad Board
Check Main Board
54
Page 55
18.5” LCD Color Monitor BenQ G922HD
PCB LAYOUT
Main Board
55
Page 56
18.5” LCD Color Monitor BenQ G922HD
56
Page 57
18.5” LCD Color Monitor BenQ G922HD
Power Board
57
Page 58
18.5” LCD Color Monitor BenQ G922HD
Appendix 1 – Screw List / Torque
(T89MRHMYFWBFHN)
Part No. Type Description Quantity Torque
0M1G 130 6120 M3*6 FOR PANEL & MAINFRAME 4
0M1G1730 6120 M3*6 FOR ALL BOARDS & MAIN FRAME 4 6±1 KGF. CM
AQ1G1740 12120 M4*12 FOR HINGE & STAND 2 6±2KGF. CM
0M1G1740 8 47 CR3 Q4*8 FOR HINGE & STAND 1 6±2KGF. CM
AM1G1740 12 47 CR3 M4*12 HINGE & STAND & MF 2 ~
0M1G1730 8120 M3*8 FOR HEAT SINK 1 ~
0M1G1730 8120 M3*8 FOR HEAT SINK 1 ~
3±0.5KGF. CM
58
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