17" LCD Color Monitor Dell E178FPC 1 Service Service Service Horizontal Frequency 30 kHz to 81 kHz Table of Contents Description Page Description Page SAFETY NOTICE ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. 5.2.Electrical Block Diagram………………..…..….......25 6. Mechanical Instructions….......................................... 27 7. Schematic Diagram………………..............................33 7.1 Main Board..........…………......................................33 7.2 Power Board……………....................................37 8. PCB Layout......................…......................................41 8.1. Main Board………………........................................41 8.2. Power Board…….………........................................44 8.3. Key Board………………….....................................47 9. Maintainability…..……….......................................48 9.1.Equipments and Tools Requirement.…….…...........48 9.2.Trouble Shooting…………………............................49 10.White-Balance, Luminance adjustment...……......55 11.ISP Instruction…………….…….................................56 12. Monitor Exploded View…………….………............60 13. BOM List…………....................................................61 14. Different Parts List…………………….……………...83 CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING Table Of Contents.......…….................……...........…........1 Revision List.….........................………................……......2 ECN History.….........................………................……......3 Important Safety Notice.….……….…..................……......4 1.Monitor Specifications.....…........................………........5 2.LCD Monitor Description…………………………….......6 3.Operation Instructions……………...............……...........7 3.1.General Instructions…………………………………….7 3.2.Control Buttons……………...............……...............8 3.3 Adjusting the Picture...........……………........…..10 4. Input/Output Specification.............……………........…16 4.1.Input Signal Connector ............………….................16 4.2.Factory Preset Display Modes...…..…......................17 4.3.Power Supply Requirements..........……...................17 4.4.Panel Specification…….....……………..................18 4.5.Definition of Pixel Defects…………...............……….19 5.Block Diagram…….…...................…………................23 5.1.Software Flow Chart………..………………....….......23
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17" LCD Color Monitor Dell E178FPC
1
Service Service Service
Horizontal Frequency 30 kHz to 81 kHz
Table of Contents Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
7. Schematic Diagram………………..............................337.1 Main Board..........…………......................................337.2 Power Board……………....................................378. PCB Layout......................…......................................418.1. Main Board………………........................................418.2. Power Board…….………........................................448.3. Key Board………………….....................................479. Maintainability…..……….......................................489.1.Equipments and Tools Requirement.…….…...........489.2.Trouble Shooting…………………............................4910.White-Balance, Luminance adjustment...……......5511.ISP Instruction…………….…….................................5612. Monitor Exploded View…………….………............6013. BOM List…………....................................................6114. Different Parts List…………………….……………...83
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
Table Of Contents.......…….................……...........…........1Revision List.….........................………................……......2 ECN History.….........................………................……......3 Important Safety Notice.….……….…..................……......41.Monitor Specifications.....…........................………........5 2.LCD Monitor Description…………………………….......63.Operation Instructions……………...............……...........73.1.General Instructions…………………………………….73.2.Control Buttons……………...............……...............83.3 Adjusting the Picture...........……………........…..104. Input/Output Specification.............……………........…164.1.Input Signal Connector............………….................164.2.Factory Preset Display Modes...…..…......................174.3.Power Supply Requirements..........……...................174.4.Panel Specification…….....……………..................184.5.Definition of Pixel Defects…………...............……….195.Block Diagram…….…...................…………................235.1.Software Flow Chart………..………………....….......23
17" LCD Color Monitor Dell E178FPC
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Revision List Revision Release Date Revise history TPV model
A11 Jul.30-2008 Add new models in item 14 T78GM9HJFDDDNC T78CM9HMFDDLNC T7RCMEHKFDDFNC T7RCMEHJFDDFNC
T7RCMEHBFDDFNC T7RCMEHMFDDFNC A12 Aug.-12-2008 Add new models in item 14
T7RCMEHMFDDRNC
A13 Dec.-24--2008 Change Y value to Ymin (min luminance value)in
item 10 ALL
ECN History
ECN No. Change Description Service Deposition Cut-in date MSR
ECN-D-EE147
ECR032126
E178WFPc implement AM
function
N/A 06/29/2007 A01
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Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing
service operations. Some of these service operations require the use of tools specially designed for the purpose.
The special tools should be used when and as recommended. It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected. Hereafter throughout this manual, AOC Company will be referred to as AOC. WARNING Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock, fire, or other hazards. Under no circumstances should the original design be modified or altered without written permission from AOC. AOC assumes no liability, express or implied, arising out of any unauthorized modification of design. Servicer assumes all liability. FOR PRODUCTS CONTAINING LASER: DANGER-Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM. CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. CAUTION -The use of optical instruments with this product will increase eye hazard. TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE MANUAL. Take care during handling the LCD module with backlight unit -Must mount the module using mounting holes arranged in four corners. -Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen. -Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel. -Protect the module from the ESD as it may damage the electronic circuit (C-MOS). -Make certain that treatment person’s body is grounded through wristband. -Do not leave the module in high temperature and in areas of high humidity for a long time. -Avoid contact with water as it may a short circuit within the module. -If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)
Viewable angle Viewing angle 160 (vertical) typ, 160 (horizontal) typ
LCD Panel
Response time 5ms typical(Black to White)
Video R, G, B Analog Interface, DVI digital Interface
Separate Sync H/V TTL
H-Frequency 30 kHz to 81 kHz (automatic) Input
V-Frequency 56 Hz to 76 Hz (automatic)
Display Colors 16.7M
Dot Clock 135MHz (Max.)
Max. Resolution 1280 x 1024 at 75 Hz
Plug & Play VESA DDC
ON Mode 34 W (typical) EPA ENERGY STAR®
OFF Mode <1W
Input Connector 15-pin D-subminiature, blue connector
Maximum Screen Size Horizontal : 337.9 mm (13.3 inches)
Vertical: 270.3 mm (10.6 inches)
Power Source 100 to 240 VAC / 50-60 Hz / 1.5A (RMS) Max.
Environmental Considerations
Operating Temp: 5° to 35°C Operating Humidity: 10% to 80% Storage Temp.: -20° to 60°C
Weight
Weight with packaging: 12.9 lbs (5.85kg)
Weight with stand assembly and cables: 10.2 lbs (4.63 kg)
Weight without stand assembly: 8. 1 lbs (3.69 kg)
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2. LCD Monitor Description The LCD monitor will contain a main board, power board, key board, which house the flat panel control logic,
brightness control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage.
Video signal, DDC
Power board
Flat Panel and
CCFL backlight
Main Board
Key board
RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
AC-IN
100-240V
Monitor Block Diagram
Host Computer
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3. Operation instructions 3.1 General Instructions 1. With the menu off, press the MENU button to open the OSD system and display the main features menu.
2. Press the - and + buttons to move between the function icons. As you move from one icon to another, the
function name is highlighted to reflect the function or group of functions (sub-menus) represented by that icon. See
the table below for a complete list of all the functions available for the monitor.
3. Press the MENU button once to activate the highlighted function. Press -/+ to select the desired parameter,
press menu to enter the slidebar, then use the - and + buttons, according to the indicators on the menu, to make
your changes.
4. Press the MENU button once to return to the main menu to select another function or press the MENU button
two or three times to exit from the OSD.
A Function icons B Main Menu C Menu icon
D Sub-Menu name E Resolution
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3.2 Control Buttons
1 Menu selection button
2 Brightness Contrast / Down(-) button
3 Auto-Adjust / Up(+) button
4 Power On/Off button with LED indicator
1
MENU
The 'MENU' button is used to open the on-screen display (OSD),
select function icons, exit from menus and sub-menus, and to exit the
OSD. See Accessing the Menu System
2
Brightness/Contrast Hot Key
Use this button for direct access to the 'Brightness' and 'Contrast'
control menu.
2,3
Down (-) and Up (+)
Use these buttons to adjust (decrease/increase ranges) items in the
OSD.
NOTE: You can activate automatic scroll feature by pressing and
holding either + or - button.
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3
Auto Adjust
Use this button to activate automatic setup and adjustment. The
following dialog will appear on screen as the monitor self-adjusts to the
current input:
Auto Adjust In Progress
Auto Adjustment button allows the monitor to self-adjust to the incoming video signal. After using 'Auto Adjustment', you can further
tune your monitor by using the 'Pixel Clock' and 'Phase' controls in the
OSD.
NOTE: Auto Adjust will not occur if you press the button while there are
no active video input signals, or attached cables.
4
Power Button and Indicator
The green LED indicates the monitor is on and fully functional. An
amber LED indicates DPMS power save mode.
The Power button turns the monitor on and off.
On Screen Menu/Display (OSD) Direct-Access Functions
Function Adjustment Method
Auto adjustment
Use this button to activate automatic setup and adjustment. The following
dialog will appear on screen as the monitor self-adjusts to the current input:
Auto Adjust In Progress
Auto Adjustment button allows the monitor to self-adjust to the incoming video signal. After using 'Auto Adjustment', you can further tune your monitor
by using the 'Pixel Clock' and 'Phase' controls in the OSD.
NOTE: Auto Adjust will not occur if you press the button while there are no
active video input signals, or attached cables.
Brightness / Contrast
With the menu off, press button to display the 'Brightness' and 'Contrast'
adjustment menu.
The 'Brightness' function adjusts the luminance of the flat panel.
Adjust 'Brightness' first, and then adjust 'Contrast' only if further adjustment is
17" LCD Color Monitor Dell E178FPC
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necessary.
"+" increase 'brightness'
" - "decrease 'brightness'
The 'Contrast' function adjusts the degree of difference between darkness and
lightness on the display screen.
"+" increase the 'contrast'
"-" decrease the 'contrast'
3.3 Adjusting the Picture
Icon Menu and Submenus Description
Exit This is used to exit out of the Main Menu.
Positioning:
Horizontal
Vertical
'Positioning' moves the viewing area around on the monitor screen.
When making changes to either the Horizontal or Vertical settings, no changes
occur to the size of the viewing area; the image gets shifted based on what you
select.
Minimum is '0' (-). Maximum is '100' (+).
Image settings:
Auto Adjust
Even though your computer system can recognize your new flat panel monitor on
startup, the 'Auto Adjustment' function will optimize the display settings for use
with your particular setup.
NOTE: In most cases, 'Auto Adjust' produces the best image for your
configuration; you can directly access this function via Auto Adjustment
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Pixel Clock
Phase
hotkey.
The Phase and Pixel Clock adjustments allow you to more closely adjust your
monitor to your preference. Select Image Settings in the main OSD to access
these settings.
Use the - and + buttons to adjust interference. Minimum: 0 ~ Maximum: 100
If satisfactory results are not obtained using the Phase adjustment, use the Pixel
Clock adjustment and then use Phase again.
NOTE: This function may change the width of the display image. Use the
'Horizontal' function of the 'Position' menu to center the display image on the
screen.
Color Settings
Normal Preset
Blue Preset
Red Preset
Adjusts the color temperature and saturation.
Selected to obtain the default (factory) color settings. This color setting gives a bluish tint and is used for text-based applications such as spreadsheets, programming, text editors, and so on. This color setting gives a reddish tint and is used for color-intensive applications such as photograph image editing, multimedia, movies, and so on.
17" LCD Color Monitor Dell E178FPC
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User Preset
Use the +/- buttons to increase or decrease each of the three colors (R, G, B)
independently, in single digit increments, from '0' to '100'.
NOTE: 'Color temperature' is a measure of the 'warmth' of the image colors
(red/green/blue). The two available presets ('Blue' and 'Red') favor blue and red
accordingly. Select each one to see how each range suits your eye; or utilize the
'User Preset' option to customize the color settings to your exact choice.
OSD Settings: Horizontal Position
Vertical Position
OSD Hold Time
OSD Lock
Each time the OSD opens, it displays in the same location on the screen. 'OSD Settings' (horizontal/vertical) provides control over this location. - and + buttons move OSD to the left and right. - and + buttons move OSD down and up. The OSD stays active for as long as it is in use. 'OSD Hold Time': Sets the length of time the OSD will remain active after the last time you pressed a button. Use the - and + buttons to adjust the slider in 5 second increments, from 5 to 60 seconds NOTE: Default 'OSD hold time' is 20 seconds. Controls user access to adjustments. When 'Yes' (+) is selected, no user adjustments are allowed. All buttons, except Menu, are locked. All buttons can be locked or unlocked. Press the 'Menu' button for over 15 seconds to unlock the OSD menu.
NOTE: When the OSD is locked, pressing the 'Menu' button will take the user directly to the 'OSD settings' menu, with 'OSD Lock' preselected on entry. Select 'No'(-) to unlock and allow user access to all applicable settings.
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Language Language sets the OSD to display in one of five languages (English, Español,
Français, Deutsch, and Japanese).
NOTE: The language chosen affects only the language of the OSD. It has no
effect on any software running on the computer.
Factory Reset: Factory Reset returns the settings to the factory preset values for the selected group of functions.
Exit is used to exit out of Factory Reset menu. For All settings, all user adjustable settings are reset at one time except Language settings.
IR — This feature will help reduce minor cases of image retention.
Enable LCD Conditioning: If an image appears to be stuck on the monitor,
select LCD Conditioning to help eliminate any image retention. Using the LCD
Conditioning feature may take several hours. Severe cases of image retention
are known as burn-in, the LCD Conditioning feature does not remove burn-in.
NOTE: Use LCD Conditioning only when you experience a problem with image retention.Below warning message appears once user select “Enable LCD Conditioning”:
17" LCD Color Monitor Dell E178FPC
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NOTE: Press any button on the monitor to terminate LCD Conditioning at any time.
DDC/CI (Display Data Channel/Command Interface) allows you to adjust the monitor parameters (brightness, color, balance, etc.) via software applications on your PC. Select Disable to disable this feature. For best user experience and optimum performance of your monitor, keep this feature enabled.
NOTE: If user select 'disable' for DDC/CI, the warning message will appear on screen. Then user can select Yes or No according to need.
Automatic Save With the OSD open, if you make an adjustment and then either proceed to another menu, or exit the OSD, the
monitor automatically saves any adjustments you have made. If you make an adjustment and then wait for the
OSD to disappear the adjustment will also be saved.
17" LCD Color Monitor Dell E178FPC
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OSD Warning Messages
A warning message may appear on the screen indicating that the monitor is out of sync.
Cannot Display This Video Mode
Optimum resolution 1280 x1024 60Hz
This means that the monitor cannot synchronize with the signal that it is receiving from the computer. Either the
signal is too high or too low for the monitor to use. See Specifications for the Horizontal and Vertical frequency
ranges addressable by this monitor. Recommended mode is 1280 X 1024 @ 60Hz.
NOTE: The floating 'Dell - self-test Feature Check' dialog appears on the screen if the monitor cannot sense a video signal.
Occasionally, no warning message appears, but the screen is blank. This could also indicate that the monitor is
not synchronizing with the computer.
See Troubleshooting for more information.
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4. Input/Output Specification 4.1 Input Signal Connector VGA Connector:
Pin No. Description Pin No. Description
1 Video-Red 9 Computer 5V/3.3V
2 Video-Green 10 GND-sync
3 Video-Blue 11 GND
4 GND 12 DDC data
5 Self-test 13 H-sync
6 GND-R 14 V-sync
7 GND-G 15 DDC clock
8 GND-B
VGA Connector layout
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4.2 Factory Preset Display Modes
Display Mode Horizontal
Frequency (kHz)
Vertical Frequency (Hz)
Pixel Clock (MHz)
Sync Polarity (Horizontal/Vertical)
VGA, 720 x 400 31.5 70.1 28.3 -/+
VGA, 640 x 480 31.5 60.0 25.2 -/-
VESA, 640 x 480 37.5 75.0 31.5 -/-
VESA, 800 x 600 37.9 60.3 40.0 +/+
VESA, 800 x 600 46.9 75.0 49.5 +/+
VESA, 1024 x 768 48.4 60.0 65.0 -/-
VESA, 1024 x 768 60.0 75.0 78.8 +/+
VESA, 1152 x 864 67.5 75.0 108.0 +/+
VESA, 1280 x 1024 64.0 60.0 108.0 +/+
VESA, 1280 x 1024 80.0 75.0 135.0 +/+
4.3 Power Supply Requirements
A/C Line voltage range : 100 V ~ 240 V± 10 %
A/C Line frequency range : 50 ± 3Hz, 60 ± 3Hz
Input Voltage transients : 280 volts AC for 10 sec @40
Current : 0.6A max. at 100V, 0.35A max. at 240 V
Peak surge current : < 60A peak at 240 VAC and cold starting
: < 30A peak at 120VAC and cold starting
Leakage current : < 3.5mA
Power line surge : No advance effects (no loss of information or defect)
4.4.2 Optical Characteristics The optical characteristics are measured under stable conditions at 25 (Room Temperature):
4.5 Definition of Pixel Defects 4.5.1 Inspection environment conditions: Room temperature: 20 ~ 25 C
Humidity: 65 ± 5% RH.
Illumination: Fluorescent light (Day-Light Type) display surface illumination to be 300 ~ 700 Lux. (standard
500Lux.)
To be a distance about 35±5 cm in front of LCD unit, viewing line should be perpendicular to the surface of the
module judge the visual appearance with human’s eyes. (Stand up the panel for judge and ±30° viewing edge
will be allowed)
Take off the protection film of polarizer while judging the display area.
If there is any question while judging, check the panel again in operating mode.
17" LCD Color Monitor Dell E178FPC
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4.5.2. Classification of defects: Defects are classified as major defects and minor defects according to the degree of defectiveness defined herein.
Major defects: A major defect is a defect that is likely to result in failure, or to reduce materially the usability of the
product for its intended purpose.
Minor defects: A minor defect either is a defect that is not likely to reduce materially the usability of the product for
its intended purpose, or is a departure from an established having little bearing on the effective use
or operation of the product.
4.5.3. Electrical inspection specification
Note (1) For bright dot defect, bright area should be larger than 1/2 area of a red or blue subpixel, or 1/3 area of a
green sub pixel to be count as 1 dot defect. A dot defect that is smaller than the defined dot defect will be
treated as small bright dot. A small bright dot should not be seen with the use of 6% ND filter (note (5)) or
equivalent inspection pattern.
The total number of small bright dot defect should not be greater than 5 ( ≤ 5 ).
Note (2) Adjacent-dot defect (refer to picture, dot 1,2,..,8 around A are all A’s adjacent dots) should be inspected
under the same display pattern in any one of White/Black/Green/Blue/Red/Monotone Gray pattern.
Note (3) Adjacent-dot defect should be observed under any one of white/Black/Green/Blue/Red pattern. 1 pair of
bright dots equals 2 dots.
17" LCD Color Monitor Dell E178FPC
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*Inspection patterns: Standard inspection patterns of dot defect are listed below. AU uses these patterns as
standard criteria for judging dot defect. Please inform AU if any other pattern is to be used to examine dot defect.
Note (4) The general mura symptoms will use 6 % ND Filter.
Note (5) The inspection method of ND Filter - holding ND filter in front of the panel around 1 cm and examine the
panel from 35±5 cm in the front view for 5 seconds.
4.5.4 Appearance inspection specification
Note 1: When L >=2W, defect count as liner defect.
Note 2: The judged view angle should be at 40°
17" LCD Color Monitor Dell E178FPC
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4.5.5 Outside dimension specification:
Note 1: Thickness doesn’t include bending.
Note 2: Display tolerance definition
Note 3: Panel gap (Y) definition:
17" LCD Color Monitor Dell E178FPC
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5. Block Diagram 5.1 Software Flow Chart
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
15
Y
N16
17
19
Y
N 18
17" LCD Color Monitor Dell E178FPC
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1) MCU Initializes.
2) Is the EEprom blank?
3) Program the EEprom by default values.
4) Get the PWM value of brightness from EEprom.
5) Is the power key pressed?
6) Clear all global flags.
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9) Save the power key status into EEprom. Turn on the LED and set it to green color. Scalar initializes. 10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are there any signals coming?
13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
15) Are there any signals coming from analog port?
16) Display "No connection Check Signal Cable" message. And go into standby mode after the message
disappears. 17) Program the scalar to be able to show the coming mode.
18) Process the OSD display.
19) Read the keyboard. Is the power key pressed?
17" LCD Color Monitor Dell E178FPC
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5.2 Electrical Block Diagram 5.2.1 Main Board
VLCDPC5V
XGA/SXGA
VCC3.3
B5
5.PANEL INTERFACE
VLCD
B[0..9]
A[0..9]
+5V
PC5V
A[0..9]
VCC1.8
VLCD
VCC3.3
B4
4.SCALER
RIN
GIN
SOGBIN
GNDR
GNDG
GNDBHSYNCVSYNC
Adj_BACKLIGHT
VCC1.8
Vcc3.3
VCTRL
A[0..9]
B[0..9]
DDCA_SDADDCA_SCL
DET_VGA
on_BACKLIGHTon_Panel
+5V
DDC_WP
VCC1.8
B2
2.POWER
on_Panelon_BACKLIGHT
Adj_BACKLIGHTVCC1.8
VLCD
+5V
VCTRL
VCC3.3
PC5V
LVDS OUTPUT
+5V
B3
3.INPUT
RIN
GIN
BIN
VSYNC
GNDR
GNDG
GNDB
DET_VGA
HSYNC
SOG
DDCA_SDADDCA_SCL
+5V
DDC_WP
PC5V
VCC3.3
+5V
VCC3.3
B[0..9]
17" LCD Color Monitor Dell E178FPC
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5.2.2 Inverter and Power Board
EMI
Bridge Rectifier and Filter
Start Circuit R905
PWM Control IC
Over Voltage Protect
AC input
12V
PWM Control IC
Feedback Circuit
Output Circuit
Transformer MOSFET
Over Voltage Protect
Lamp
ON/OFF
ON/OFF Control
Rectifier diodes
Feedback Circuit
Transformer
DIM
5V
17" LCD Color Monitor Dell E178FPC
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6. Mechanical Instructions Tools: 2 Power screwdrivers (φ=5mm,L=60mm); 1 small cross screwdriver; turnbuckle driver; Setting: Power screwdriver torque A=11 kgF. Cm; torque B=6 kgF. Cm Note: Firstly, put the monitor on a soft, flat and clean surface, wear gloves.
D703(BAT54) Vf=0.53V (worst cauae) whenIf=100mA. So when system power off, thesystem loading is about 32mA, it issafe.
PC5V+5V
GND
R727
10KΩ 1/10W
R71110KΩ 1/10W
R706 Q701
N.C
R725 4.7KΩ 1/10W
H2
TP
1 2 3
45
678
9
1 2 3456789
17" LCD Color Monitor Dell E178FPC
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7.2 Power Board
R9292.4K 1/10W 1%
D920FCH10A15
1
2
3
R9281K 1/8W
J907TIN COATED
C9160.1uF/50V
GND1
GND
1
HS3 D920
HEAT SINK
12
C902Y2 2200PF +-20% 250VAC
R931
10K 1/8W
L922 3.5UH
J906TIN COATED
CN902CONNECTOR
12345678910
IC921KIA431
J904TIN COATED
N.CNC
1
2
3
IC902PC123FY2 4P
12
43
F9012.5A/250V
D916
LL4148WP
C9200.001uF/500V
C9290.1uF/50V
R909100K 2W
R902330K 1/8W
RJ9010 1/8W
+5V
C9280.1uF/50V
+ C907100uF 450V
R95447 1/8W
D901UF4003PT
Q900STP8NK80ZFP1
32
+
C927470UF/25V
ON/OFF
J911TIN COATED
+ C922680uF/25V
R90510K 1/8W
+ C924680uF/25V
C9101500pF/1KV
C914
470PF/25V
R912
10 1/8W
DIM
D915
LL4148WP
J909TIN COATED
NC
R901330K 1/8W
NC
C913220pF/50V
R92633K 1/10W 1%
R952 47 1/8W
J908TIN COATED
+C925
470UF/25V
audio 12V
R900330K 1/8W
ZD921RLZ13B
12
R9243.6K 1/10W 1%
C9210.001uF/500V
+ C932NC
J903TIN COATED
LD7575
IC901LD7575
1 3
4
7
2
5
68
RT CS
GN
D
N.C
CO
MP
OUT
VC
CHV
J901TIN COATED
ACustom
1 1Tuesday , January 09, 2007
Title
Size Document Number Rev
Date: Sheet of
R91510K 1/10W
J905TIN COATED
R922470 1/4W
L921 3.5UH
C901Y2 2200PF +-20% 250VAC
R911100K 1/10W +-%1
+5V
C9050.0047uF/250V
C9310.1uF/50V
R9160.43 2W
-+
BD9012A 800V
2
1
3
4
01. POWER
N.C C9000.0022uF/250V
J902TIN COATED
RJ9020 1/8W
TPV(Top victory) Electronics Co.,ltd.
R9107R5 1/8W
GND2
GND
1
+ C923680uF/25V
D900FR107
CN901
SOCKET
12
3
+12V
D922
3A/60V
+ C926
1000uF/16V
ZD920TPSMP9 1A-E3 DO-220AA
12
NC
32
1
R95147 1/8W
C909 0.47uF/250V
N.C
12
R923
10K 1/10W
R9271K 1/10W
ZD922RLZ5.1B
12
C9120.1uF/50V
HS4 Q900
HEAT SINK
12
R9251K 1/10W
D910LL4148WP
L901
L
14
23
F9030
F9020
NC
O
O
OO
T901
10
1
867
9
1112
2
4
C9300.1uF/50V
L902
L
1 4
2 3
J910TIN COATED
R930
1K 1/10W
R95547 1/8W
R9131K 1/10W
+ C91122uF/50V
t
NR901
8 ohm/8A
12
NC
G1492-A-DEL-7A-2-070109
17" LCD Color Monitor Dell E178FPC
38
VCC
RJ8010 1/8W
C81615PF/6KV
+12V
CN801
33G8021-2E-U1
2
J818TIN COATED
N.C C815
1000P/50V
J820TIN COATED
R8323MΩ 1/2W
J823TIN COATED
C837
NC
Q806AM9945
1 2 3 45678
S1N
G1N
S2P
G2P
D2P
D2P
D1N
D1N
C827270pF
IC801
OZ9938
12345678 9
10111213141516
DRV1VDDATIMERDIMISENVSENOVPTNC1 NC2
ENALCT
SSTCMPCT
GNDADRV2PGND
C83
322
0PF
/50V
RJ8020 1/8W
R81
61M
1/1
0W
C8090.047uF/25V
C835
NC
C81
056
0PF
/50V
G1492-A-DEL-7A-2-070109
+
C811470UF/25V
R84210 1/10W
R8361K 1/10W
J822TIN COATED
R82
8
15 1
/8W
C836
NC
R8431K 1/10W
R80722 1/8W
C8173PF/3KV
CN804
33G8021-2E-U
1
2
CN802
33G8021-2E-U1
2
ON/OFF
PT801S80GL17T36V5
3
7
4
1 8
R8273.6K 1/10W 1%
ZD801
RLZ5.6B
12
R809
100KΩ 1/8W
N.C C814
1000P/50V
J814TIN COATED
N.C R840
33K 1/8W
R835560 1/10W
R83015K 1/10W
CN803
33G8021-2E-U
1
2
A
1 1Tuesday , January 09, 2007
Title
Size Document Number Rev
Date: Sheet of
N.C C8290.1uF/50V
R802300K 1/8W
R81
456
K 1
/10W
TPV(Top victory) Electronics Co.,ltd.
Q801PMBS3904 3
2
1
R81
31M
1/1
0W
DIM
R82
915
1/8
W
R804
10K 1/8W
RJ8040 1/8W
C838
NC
J819TIN COATED
N.C R8380 1/8W
D802
BAV99
3
1
2
R81
915
1/8
W
C83
0 NC
C8050.001uF
R80310K 1/10W
J815TIN COATED
J816TIN COATED
R808
100KΩ 1/4W
+5V
N.C
R81
733
K 1
/10W
1%
C81
315
00PF
/50V
R81
815
1/8
W
C8190.047uF/25V
C8070.01uF
C82515PF/6KV
N.C C8010.1uF/50V
NC
R81122KΩ 1/8W
C818270pF
R84
143
0 1
/10W
1%
R8343.6K 1/10W 1%
C81
215
00PF
/50V
+C820470UF/25V
R81
510
0K 1
/10W
Q805AM9945
1 2 3 45678
S1N
G1N
S2P
G2P
D2P
D2P
D1N
D1N
R8223MΩ 1/2W
C83
122
0PF/
50V
N.C C8280.1uF/50V
C82
315
00P
F/50
V
N.C R83375K 1/10W
R831100K 1/10W
J821TIN COATED
N.C R82375K 1/10W
C83
2 NC
C82
215
00PF
/50V
D801
BAV70
02.INVERTER
C8042.2uF/16V
C8080.0068uF
Q803PMBS3904 3
2
1
R820
15K 1/10W N.C R806470 1/8W
F804
NC
3
1
2
C8263PF/3KV
N.C R839
33K 1/8W
C8030.01uF
R821100K 1/10W
R825560 1/10W
J817TIN COATED
D803
BAV70
J812TIN COATED
R83710 1/10W
J811TIN COATED
PT802S80GL17T36V5
3
7
4
1 8
R81210K 1/10W
Q802PMBS3904
32
1
R805
470 1/8W
R81
010
0K 1
/10W
R82
639
0 1
/10W
1%
C8061uF/25V
RJ8030 1/10W
17" LCD Color Monitor Dell E178FPC
39
715G2853 1
+5V
!
D900BA159GPT +5V
R9251K 1/10W 1%
IC901LD7552BPS
1234 5
678GND
COMPVCCRT NC
CSVCCOUT
R9140R43 5% 2W
!
Q902KTD1028
D915LL4148
+C918680UF25V
G2853-E-X-X-1-071204 e
PWPC742GD1 FOR DELL 17寸 POWER CIRCUIT
B
1 2Friday , February 01, 2008
Title
Size Document Number Rev
Date: Sheet of
R94033K 1/10W
ZD922RLZ5.1B
12
ZD901
NC
12
-+
BD901
KBP208G
2
1
3
4
+12V
+C915
470uF/16V
R9261K 1/10W 1%
+C922NC
C9210.0047UF/400V
ZD904RLZ22B
12
C9280.001uF
ZD921RLZ16B
12
!
C938NC
D903BAW56
C9290.001uF
CN901SOCKET
12
3
R912220R 1/8W
R961 100 1/4W
!
C909
470pF/25V
R91010R 1/4W
F9020R05 1/4W
C9040.22uF/275V
!
HS1HEAT SINK(D906)
12
C9070.1uF
!
IC903PC123X2YFZOF
12
43
+ C905100uF/450V
+ C90822uF/50V
C931
1uF
R921100 OHM 2W
T901POWER X'FMR
4
7
9
5
61
2
11
10
8
12 + C9391000uF/25V
C9120.001uF
R9291K 1/8W
R93810K 1/8W
CN902CONNECTOR
123456789
R904300K OHM 1/4W
Q901STP10NK70ZFP
R919100 1/4W
!!
R920100 1/4W
FB901BEAD
12
R918100 1/4W
R901680K 1/4W
!
R933300K OHM 1/4W
FG
L90227.0mH
1 4
2 3
HS3HEAT SINK(Q901)
12
GND1GND
12
C9010.001uF/250V
R907510K OHM 1/4W
!
DIM
C9101000pF
R908100K 2W
FG
R905510K OHM 1/4W
HS2NC
12
R915100K 1/8W
!
C925NC
R9273.6K 1% 1/10W
R9670R05 1/4W
L9041.1uH
R932300K OHM 1/4W
R90910R 1/4W
!
FG
R924150R 1/10W 5%
D90731DQ06FC3
ZD902RLZ16B
12
D916LL4148
IC904KIA431A-AT/P
!
L9031.1uH
ON/OFF
tNR901NTCR
R903680K 1/4W
!
R9421K 1/10W 1%
R902680K 1/4W
ZD903RLZ22B
12
D901 PS102R
D906SP10150
1
2
3
F901FUSE
!
R935 100 1/4W
R962 100 1/4W
C9160.47uF
C924 0.1uF/25V
+12V
R9302.4K 1% 1/10W
R906510K OHM 1/4W
D905NC
1
2
3
C930
1uF
C9030.47uF/275V
C9020.001uF/250V
C9060.0015uF/2KV
+C917
680UF25V
HS4HEAT SINK
12
!
17" LCD Color Monitor Dell E178FPC
40G2853-E-X-X-1-071107 E
PWPC742GD1 FOR DELL 17寸POWER CIRCUIT
Custom
2 2Monday , January 21, 2008
Title
Size Document Number Rev
Date: Sheet of
R8621M 1/10W 5%
R8211K 1/10W 1%
C8420.01uF
R85533 1/4W
!
R83210K 1/10W
R8121K 1/10W 1%
Q805PDTC144WK
C820220pF
R8113.6K 1% 1/10W
ON/OFF
R86410K 1/10W 5%
D806LL4148
R8312.4K 1% 1/10W
C8070.1uF/25V
DIM
D811NC
Vref
!
Q807PMBS3904
R8141K5 1/10W 1%
C8340.1uF/25V
R81710K 1/10W
Q806PMBS3904
R85733 1/4W D812
NC
R8221K 1/10W 1%
R86391K 1/10W 5%
Q802APM9945KC
1
2
3
4
8
7
6
5
S
G
S
G
D
D
D
D
R804100 1/8W
C8050.1uF
Q811PMBS3904
C835NC
R8261K 1/10W 1%
R8181K 1/10W 1%
C8391000pF
Vref
R8351M 1/10W 5%
C8150.0022uF
+C803
470uF/25V
T802POWER X'FMR1
4
8
3
7 96
2
5
D803BAV99
3
1
2
D804BAV99
3
1
2
R85368K 1% 1/10W
C8160.0022uF
R8193.6K 1/10W
R8518K2 1/10W
R8241K 1/10W 1%
R861390K 1/10W
R8031M 1/10W 5%
D802BAV99
3
1
2
Q810RK7002
R85833 1/4W
R80747K 1/10W
R805NC
C80110pF/6KV
C8221uF/25V
!
R84168K 1% 1/10W
C8250.1uF/25V
C8401000pF
D805BAW56
3
1
2
C
B
E
R8151K5 1/10W 1%
D809LL4148
R85468K 1% 1/10W
Q812PMBS3906
1
23
R82533R 1/8W
R8233.6K 1/10W
R83310K 1/10W
R83410K 1/10W
R8011K5 1/10W 1%
D808BAW56
3
1
2C
B
E
D817LL4148
CN801CONN
12 HV
LV
Q808PDTA144WK
C8190.0022uF
D813NC
C8230.0022uF
+C802
470uF/25V
!
D801BAV99
3
1
2
Q801PMBS3904
R82810K 1/10W
C8210.1uF/25V
Q803APM9945KC
1
2
3
4
8
7
6
5
S
G
S
G
D
D
D
D
R82933R 1/8W
C8381000pF
R81310K 1/10WR808
10K 1/10W
R80668K 1% 1/10W
CN803CONN
12 HV
LVR8091K 1/10W 1%
C817NC
R82710K 1/10W 5%
+12V
CN802CONN
12 HV
LV
T801POWER X'FMR1
4
8
3
7 96
2
5
Q804PMBS3906
1
23
D810NC
C8452.2uF/16V
D814LL4148
C81110pF/6KV
R85633 1/4W
Q813PMBS3904
R802NC
IC801
TL494IDR
12345678 9
10111213141516
1IN+1IN-FEEDBACKDTCCTRTGNDC1 E1
E2C2
VCCOUTPUT CTRL
REF2IN-2IN+
C846NC
F8010R05 1/4W
R839100R 1/8W
R81051K 1% 1/8W
CN804CONN
12 HV
LV
R850100R 1/8W
C8411000pF
R83747K 1/8W
R8161K5 1/10W 1%
Q809RK7002
R82047K 1/10W
C8240.1uF
17" LCD Color Monitor Dell E178FPC
41
8. PCB Layout 8.1 Main Board
17" LCD Color Monitor Dell E178FPC
42
17" LCD Color Monitor Dell E178FPC
43
17" LCD Color Monitor Dell E178FPC
44
8.2 Power Board
17" LCD Color Monitor Dell E178FPC
45
17" LCD Color Monitor Dell E178FPC
46
17" LCD Color Monitor Dell E178FPC
47
8.3 Key Board
17" LCD Color Monitor Dell E178FPC
48
9. Maintainability 9.1 Equipments and Tools Requirement
1. Voltage meter
2. Oscilloscope
3. Pattern Generator
4. LCD Color Analyzer
5. Service Manual
6. User Manual
17" LCD Color Monitor Dell E178FPC
49
9.2 Trouble shooting 9.2.1 Main Board
No power
No power
Press power key and look
if the picture is normal
Please reinsert and make sure
the AC of 100-240 is normal
Measure U701 PIN2=3.3V
C702 “-”=1.8V
Reinsert or check the Adapter/Inverter section
X401 oscillate waveforms
are normal
Check CN701 or replace U701,Q702
Replace U401
Replace X401
OK
OK
OK
NG
OK
NG
NG
17" LCD Color Monitor Dell E178FPC
50
No picture (LED orange)
No picture
Measure U701 PIN2=3.3V
C702 “-”=1.8V
Replace U401
X401 oscillate
waveform is normal
Replace Q702, U702
OK
OK
OK
NG
Check HS/VS from
CN405 is normal
Replace X401
Check Correspondent component
NG
NG
Replace U401
Whether the reset
of the Scalar IC is
useful?
Check C418, D414,
D415, R404 NG
OK
17" LCD Color Monitor Dell E178FPC
51
White screen
White screen
Measure Q706 base
is high level?
X401 oscillate waveform is normal
Check Q704 is broken or
CN101 solder?
Check Correspondent component.
Replace PANEL
Check Correspondent component.
Replace U401
OK
OK
OK Replace X401
OK
NG
NG
NG
NG
Check reset circuit of
U401 is normal
17" LCD Color Monitor Dell E178FPC
52
9.2.2 Power/Inverter Board
No power
Check bridge rectified circuit and F901 circut
1) Check IC901
2) Check C911, D901, R910…OVP circuit
Check CN902 pin3, 4 = 12V
Check the voltage of C907(+)
Check start voltage for the pin8 of IC901
Check R905 and Change IC901 NG
Check the auxiliary voltage is bigger than
10V and smaller than 20V
NG
NG
NG
Check D920,L921,ZD920,C922-C925,……
Check IC901 pin5 PWM wave
Check IC901,Q900 NG
OK
NG
OK
OK
OK
OK
Check AC line volt 110V or 220V
Check AC input
17" LCD Color Monitor Dell E178FPC
53
No Backlight
Check CN902 Pin 3, 4=12V
NG OK Check adapter and F902
Check ON/OFF signal
Check Interface board or main board NG OK
Check IC801 PIN2=5V
NG OK
Change on/off circuit
Check IC801 PIN13 have triangle wave
NG OK Change IC801, C810
Check IC801 PIN1/PIN15 PWM wave
NGOK
Check Q805/Q806,IC801
Check the output of PT801, PT802
Check connecter & lamp
OK NGChange PT801, PT802, and
feedback circuit
17" LCD Color Monitor Dell E178FPC
54
9.2.3 Keypad Board
OSD is unstable or not working
Is Key Pad Board connecting normally? Connect Key Pad Board
Is Button Switch normally? Replace Button Switch
Y
N
N
Is Key Pad Board normally? Replace Key Pad Board
Y
N
Y
Check Main Board
17" LCD Color Monitor Dell E178FPC
55
10. White balance, Luminance adjustment Approximately 2 Hours should be allowed for warm up before proceeding White-Balance adjustment.
Before started adjust white balance, please setting the Chroma-7120 MEM. Channel 3 to 65000K colors, MEM.
Channel 4 to 93000K colors, MEM. Channel 9 to 57000K (our 9300 parameter is x=283±30, y=297±30, Ymin
=160 cd/m2 ;6500 parameter is x =313±30, y=329±30, Ymin = 160 cd/m2, and 5700 parameter is x = 326 ±30, y =
349 ±30, Ymin = 160 cd/m2)
How to setting MEM.channel you can reference to Chroma-7120 user guide or simple use “ SC” key and “ NEXT”
key to modify x, y, Y value and use “ID” key to modify the TEXT description Following is the procedure to do
white-balance adjust
Enter into the factory mode:
Press MENU and “+” button during press Power button will activate the factory mode,
Gain adjustment:
Move cursor to “-Factory Setting-” and press MENU key to enter this sub-menu.
Move cursor to “Factory” and press MENU key.
Move cursor to “ Auto Level” and press MENU key to adjust Gain and Offset automatically;
a. Adjust sRGB (65000K) color-temperature
1. Switch the Chroma-7120 to RGB-mode (with press “MODE” button)
2. Switch the MEM. channel to Channel 3 (with up or down arrow on Chroma-7120)
3.The LCD-indicator on Chroma-7120 will show x = 313 ±30, y = 329 ±30, Ymin = 160 cd/m2
b. Adjust Color1 (93000K) color-temperature
4. Switch the Chroma-7120 to RGB-mode (with press “MODE” button)
5. Switch the MEM.channel to Channel 4 (with up or down arrow on Chroma-7120)
6. The LCD-indicator on Chroma-7120 will show x = 283 ±30, y = 297 ±30,Ymin= 160cd/m2
c. Adjust Color2 (57000K) color-temperature
7. Switch the Chroma-7120 to RGB-mode (with press “MODE” button)
8. Switch the MEM.channel to Channel 9 (with up or down arrow on Chroma-7120)
9. The LCD-indicator on Chroma-7120 will show x = 326 ±30, y = 349 ±30,Ymin =160 cd/m2
10. Move cursor to “Exit/Save” sub-menu and press MENU key to save adjust value and exit.
Turn the POWER-button off to on to quit from factory mode.
Max Brightness measurement: >230 cd/ Test conditions:
a. Switch to the full white pattern, in user mode main menu: 1. Set <Color Settings> Red, Green, and Blue to the max. 2. Set <Brightness> Brightness, Contrast to the max.
b. The Minimum brightness is: < 40% of Max luminance (max luminance = max contrast + max brightness) Test conditions: Set <Brightness> Brightness, Contrast to the min.
17" LCD Color Monitor Dell E178FPC
56
11. ISP Instruction
Configure and procedure It is a windows-based program, which cannot be run in MS-DOS. System and equipment requirements (1). An i486 (or above) personal computer or computer or compatible. (2). Microsoft operation system Window 95/98/2000/XP. (3). ISP Tool: ISP board/printer cable/VGA cable as shown in Fig.1
Fig.1
(4). ISP software checklist
(5). Update the firmware
Step 1: Double click the ISP_Tool v3.772.exe icon and click Connect, bring up Fig.2
Fig.2
Connect to PC LPT Link to Dell
VGA connector
17" LCD Color Monitor Dell E178FPC
57
Step 2: Click OK and click Read, select program Bin file, bring up Fig.3
Fig.3
17" LCD Color Monitor Dell E178FPC
58
Step3: Click open and OK, bring up Fig.4 and Fig.5
Fig.4
Fig.5
17" LCD Color Monitor Dell E178FPC
59
Step 4: Click Auto and Run, bring up Fig.6
Fig.6
Step 5: When appear Verify OK, writer finished as shown Fig.7