Dell E176FPc
Service Manual
17” LCD MONITOR
DELL E176FPc
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
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Dell E176FPc |
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Revision List |
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Revision |
Release Date |
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Revise history |
TPV model |
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T780KCDHK8DLNP |
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A00 |
Aug.-26-2005 |
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Initial Release |
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T780KGDHK8DZNP |
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T780KGDHK8DENP |
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A01 |
Mar.-31-2006 |
Add” Definition Of Pixel Defects” |
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A02 |
April-25-2006 |
Add” Max Brightness measurement” |
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on Page43 |
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A03 |
Mar.-30-2007 |
Add Mechanical Instruction in item 6 |
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Dell E176FPc |
Table of contents |
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Table of contents ---------------------------------------------------------------------------------------------------------------- |
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1. Monitor Specifications ------------------------------------------------------------------------------------------------------ |
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2. LCD Monitor Description -------------------------------------------------------------------------------------------------- |
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3. Operation instructions -------------------------------------------------------------------------------------------------- |
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3.1 General Instructions ------------------------------------------------------------------------------------------------ |
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3.2 Control buttons -------------------------------------------------------------------------------------------------------- |
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3.3 On Screen Menu/Display (OSD) --------------------------------------------------------------------------------------- |
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3.4 Adjusting the Picture - ---------------------------------------------------------------------------------------------- |
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4. Input/Output Specification --------------------------------------------------------------------------------------------------- |
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4.1 Input Signal Connector -------------------------------------------------------------------------------------------- |
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4.2 Factory Preset Display Modes ----------------------------------------------------------------------------------------- |
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4.3 Power Supply Requirements ---------------------------------------------------------------------------------------- |
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4.4 Panel Specification ----------------------------------------------------------------------------------------------------- |
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5. Block Diagram ---------------------------------------------------------------------------------------------------------------- |
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5.1 Monitor Exploded View ----------------------------------------------------------------------------------------------- |
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5.2 Software Flow Chart ---------------------------------------------------------------------------------------------------- |
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5.3 Electrical Block Diagram ---------------------------------------------------------------------------------------------- |
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6. Mechanical Instruction ------------------------------------------------------------------------------------------------------ |
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7. Schematic Diagram ------------------------------------------------------------------------------------------------------------- |
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6.1 Main Board --------------------------------------------------------------------------------------------------------------- |
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6.2 Power Board --------------------------------------------------------------------------------------------------------------- |
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8. Layout ---------------------------------------------------------------------------------------------------------------------------- |
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7.1 Main Board ---------------------------------------------------------------------------------------------------------------- |
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7.2 Power Board -------------------------------------------------------------------------------------------------------------- |
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7.3 Key Board ----------------------------------------------------------------------------------------------------------------- |
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9. Maintainability ----------------------------------------------------------------------------------------------------------- |
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8.1 Equipments and Tools Requirement -------------------------------------------------------------------------------- |
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8.2 Trouble Shooting ------------------------------------------------------------------------------------------------------ |
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10. White Balance Adjustment --------------------------------------------------------------------------------------------- |
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11. EDID Content --------------------------------------------------------------------------------------------------------------- |
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12. ISP User Manual --------------------------------------------------------------------------------------------------------- |
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12.1 Connect ISP Writer preparation action ---------------------------------------------------------------------- |
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12.2 To Use ISP WRITER ------------------------------------------------------------------------------------------------ |
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12.3 Executing ISP ------------------------------------------------------------------------------------------------------------- |
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13. Check List -------------------------------------------------------------------------------------------------------------------- |
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14. BOM List ----------------------------------------------------------------------------------------------------------------- |
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15. Definition Of Pixel Defects-------------------------------------------------------------------------------------------------- |
70 |
3
Dell E176FPc
1. Monitor Specifications
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Screen type |
Active matrix - TFT LCD |
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Panel Type |
LM170E01-TLB3/TLB4 (LPL) |
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CLAA170EA07 |
(CPT) |
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Size |
430mm(17.0") |
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LCD Panel |
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Pixel pitch |
0.264mm(H) x 0.264mm(V) |
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Viewable angle |
LM170E01-TLB3/TLB4: 70°/70° (H) 75°/65° (V) (typ.) |
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(CR>=10) |
CLAA170EA07: 70°/70° (H) 67°/63° (V) (typ.) |
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Response time |
LM170E01-TLB3/TLB4: 8ms(type) |
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CLAA170EA07: 12ms(type) |
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Video |
R, G, B Analog Interface |
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Input |
Separate Sync |
H/V TTL |
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H-Frequency |
30kHz – 80kHz |
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V-Frequency |
55 - 75Hz |
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Display Colors |
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16.2M Colors |
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Dot Clock |
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135MHz(Max) |
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Max. Resolution |
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1280 x 1024 |
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Plug & Play |
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VESA DDC |
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ON Mode |
<45W |
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EPA ENERGY STAR® |
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OFF Mode |
<2W |
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Input Connector |
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D-Sub 15pin |
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Input Video Signal |
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Analog:0. 7Vp-p(standard) |
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75 OHM, Positive |
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Maximum Screen Size |
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Horizontal : 337.92mm |
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Vertical: 270.336mm |
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Power Source |
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100 V ~ 240 V± 10 %VAC, 50 ± 3Hz, 60 ± 3Hz |
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Environmental |
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Operating Temp: 5° to 35°C |
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Operating Humidity: 10% to 80% |
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Considerations |
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Storage Temp.: -20° to 60°C |
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Monitor (Stand and Head): 5.2kg (11.5 lb) |
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Weight |
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Monitor Flat panel only (VESA Mode): 4.0 kg (8.8 lb) |
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Weight with packaging: 6.4 kg (14.1 lb) |
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4
Dell E176FPc
2. LCD Monitor Description
The LCD MONITOR will contain a main board, PWPC board, keypad 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.
Monitor Block Diagram
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CCFL Drive. |
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Flat Panel and |
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CCFL backlight |
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RS232 Connector |
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PWPC board |
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Main Board |
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For white balance |
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adjustment in factory |
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mode |
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Keyboard |
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Video signal, DDC |
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AC-IN |
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HOST Computer |
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100-240V |
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5
3. Operation instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.
-The power cord should be connected.
-Connect the video cable from the monitor to the video card.
-Press the power button to turn on the monitor, the power indicator will light up.
3.2Control Buttons
1 Menu selection button
2 Brightness Contrast / Down (-) button
3 Auto-Adjust / Up (+) button
4 Power button On/Off button with indicator
A
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.
B |
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Use this button for direct access to the 'Brightness' and 'Contrast' control |
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menu. |
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Brightness/Contrast Hot Key |
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Use these buttons to adjust (decrease/increase ranges) items in the OSD. |
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B C |
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- and + buttons |
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Use this button to activate automatic setup and adjustment. The following |
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C |
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dialog will appear on screen as the monitor self-adjusts to the current input: |
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Auto Adjust In Progress |
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Auto Adjust |
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Auto Adjustment |
button allows the monitor to self-adjust to the |
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incoming video signal. After using 'Auto Adjustment', you can further tune |
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your monitor by using the 'Pixel Clock' and 'Phase' controls in the OSD. |
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The green LED indicates the monitor is on and fully functional. An amber |
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D |
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LED indicates DPMS power save mode. |
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Power Button & Indicator |
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The Power button turns the monitor on and off. |
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6
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Dell E176FPc |
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3.3 On Screen Menu/Display (OSD) |
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Direct-Access Functions |
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Function |
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Adjustment Method |
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Auto adjustment |
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Use this button to activate automatic setup and |
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adjustment. The following dialog will appear on |
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screen as the monitor self-adjusts to the current |
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input: |
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Auto Adjust In Progress |
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Auto Adjustment |
button allows the monitor to |
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self-adjust to the incoming video signal. After using |
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'Auto Adjustment', you can further tune your monitor |
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by using the 'Pixel Clock' and 'Phase' controls in the |
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OSD. |
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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, push button to display the
'Brightness' and 'Contrast' adjustment menu.
The 'Brightness' function adjusts the luminance of the flat panel.
Adjust 'Brightness' first, then adjust 'Contrast' only if further adjustment is 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'
7
Dell E176FPc
3.4Adjusting the Picture
1.With the menu off, push the 'MENU' button to open the OSD system and display the main features menu.
A |
Function icons |
B |
Main Menu |
C |
Menu icon |
D |
Sub-Menu name |
E |
Resolution |
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2.Push 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.Push the 'MENU' button once to activate the highlighted function; Push -/+ to select the desired parameter, push menu to enter the slide bar. Then use the - and + buttons, according to the indicators on the menu, to make your changes.
4.Push the 'Menu' button once to return to the main menu to select another function or push the ‘Menu’ button two or three times to exit from the OSD.
8
Dell E176FPc
Icon |
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Menu Name and |
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Description |
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Sub-menus |
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EXIT |
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This is used to exit out of the 'Main menu'. |
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Positioning:
Horizontal
Vertical
Image settings:
Auto Adjust
Pixel Clock
'Positioning' moves the viewing area around on the monitor screen.
When making changes to either the 'Horizontal' or 'Vertical' settings, no changes will occur to the size of the viewing area; the image will simply be shifted in response to your selection/change.
Minimum is '0' (-). Maximum is '100' (+).
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' will produce the best image for your configuration; this function can be directly access via Auto Adjustment hotkey.
The 'Phase' and 'Pixel Clock' adjustments allow you to more closely adjust your monitor to your preference. These settings are accessed through the main OSD menu, by selecting 'Image Settings'.
Use the - and + buttons to adjust away interference. Minimum: 0 ~ Maximum: 100
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Dell E176FPc |
Phase |
If satisfactory results are not obtained using the 'Phase' adjustment, use the 'Pixel |
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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: |
'Color Settings' adjusts the color temperature and saturation. |
Normal Preset |
'Normal Preset' is selected to obtain the default (factory) color settings. |
Blue Preset |
'Blue Preset' is selected to obtain a bluish tint. This color setting is typically used for text |
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based applications (Spreadsheets, Programming, Text Editors etc.). |
Red Preset |
'Red Preset' is selected to obtain a redder tint. This color setting is typically used for |
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color intensive applications (Photograph Image Editing, Multimedia, Movies etc.). |
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User Preset
OSD Settings:
Horizontal Position
Vertical Position
OSD Hold Time:
OSD Lock
Dell E176FPc
'User Preset': Use the plus and minus 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.
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.
'OSD Lock': Controls user access to adjustments. When 'Yes' (+) is selected, no user adjustments are allowed. All buttons are locked except the menu button.
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:
Factory Reset:
Dell E176FPc
Language sets the OSD to display in one of five languages (English, Español, Français, Deutsch, 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' 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'.
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 will appear on-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.
12
Dell E176FPc
4. Input/Output Specification
4.1 Input Signal Connector
PIN NO. |
DESCRIPTION |
PI N NO. |
DESCRIPTION |
1. |
Red Video |
9. |
+5V |
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Green Video |
10. |
Logic Ground |
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Blue Video |
11. |
RXD |
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4. |
TXD |
12. |
DDC-Serial Data |
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5. |
Detector Pin |
13. |
H-Sync |
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6. |
R-Ground |
14. |
V-Sync |
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7. |
G-Ground |
15. |
DDC-Serial Clock |
8.B-Ground
VGA Connector layout
1 |
5 |
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10 |
11 |
15 |
4.2 Factory Preset Display Modes
VESA MODES
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Horizontal |
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Vertical |
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Nominal |
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Sync |
Nominal |
Sync |
Nominal |
Mode |
Resolution |
Total |
Frequency |
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Polarity |
Freq.+/- 1Hz |
Polarity |
Pixel Clock (MHz) |
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+/- 0.5kHz |
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640x480@60Hz |
800 x 525 |
31.469 |
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N |
59.940 |
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25.175 |
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VGA |
640x480@75Hz |
840 x 500 |
37.500 |
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N |
75.00 |
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31.500 |
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800x600@60Hz |
1056 x 628 |
37.879 |
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P |
60.317 |
P |
40.000 |
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800x600@75Hz |
1056x625 |
46.875 |
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P |
75.000 |
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49.500 |
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XGA |
1024x768@60Hz |
1344x806 |
48.363 |
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N |
60.004 |
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65.000 |
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1024x768@75Hz |
1312x800 |
60.023 |
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P |
75.029 |
P |
78.750 |
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1152x864@75Hz |
1600x900 |
67.500 |
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P |
75.000 |
P |
108.00 |
SXGA |
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1280x1024@60Hz |
1688x1066 |
64.000 |
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P |
60.000 |
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108.00 |
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1280x1024@75Hz |
1688x1066 |
79.976 |
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P |
75.025 |
P |
135.00 |
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IBM MODES |
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Nominal |
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Sync |
Nominal |
Sync |
Nominal Pixel |
Mode |
Resolution |
Total |
Frequency |
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Polarit |
Freq. +/- 1 |
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Polarity |
Clock (MHz) |
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+/- 0.5kHz |
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Hz |
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DOS |
720x400@70Hz |
900 x 449 |
31.469 |
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N |
70.087 |
P |
28.322 |
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13
Dell E176FPc
4.3 Power Supply Requirements
A/C Line voltage range |
100 V ~ 240 V± 10 % |
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A/C Line frequency range |
50 ± 3Hz, 60 ± 3Hz |
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Input Voltage transients |
280 volts AC for 10 sec @40 |
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Current |
0.6A max. at 100V, 0.35A max. at 240 V |
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Peak surge current |
< 60A peak at 240 VAC and cold starting |
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< 30A peak at 120VAC and cold starting |
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Leakage current |
< 3.5mA |
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Power line surge |
No advance effects (no loss of information or defect) |
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with a maximum of 1 half-wave missing per second |
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14
Dell E176FPc
4.4 Panel Specification
Display Characteristics (For LM170E01-TLB3 panel)
Display Characteristics (For LM170E01-TLB4 panel)
Display Characteristics (For CLAA170EA07 panel)
15
Dell E176FPc
4.4.2 Optical Characteristics (For LM170E01TLB3/TLB4 panel)
16
Dell E176FPc
Optical Characteristics (For CLAA170EA07 panel)
17
5.Block Diagram
5.1Monitor Exploded View
18
5.2 Software Flow Chart
1
Y
2 3
N
4
5 |
N |
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Y |
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6 |
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7 |
N |
8 |
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Y |
9 |
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10 |
N |
11 |
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Y |
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N |
12 |
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13 |
N |
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Y |
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Y |
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14 |
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15 |
N |
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16 |
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Y |
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17 |
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18 N 19
Y
19
Dell E176FPc
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?
20
Dell E176FPc
5.3 Electrical Block Diagram
5.3.1 Main Board
LCD Interface
(CN101)
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Flash Memory |
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SST25VF020-20- 4C-SAE |
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Scalar GM2621 |
(U402) |
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(Include MCU, ADC, OSD) |
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(U401) |
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RXD |
R |
H |
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EPR_SDA |
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G |
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DB15_SDA, |
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TXD |
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V |
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EPR_SCL |
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B |
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DB15_SCL |
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OSD Control Interface |
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EEPROM |
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D-Sub |
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EEPROM (U404) |
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(CN403) |
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M24C16-MN6T |
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Connector |
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M24C02WMN6 |
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(U403) |
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(CN405) |
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21
Dell E176FPc
5.3.2 Inverter/Power Board
22