How to adjust color of screen - Hannspree HF225DPB 21 inch LCD Monitor

The ST651 display adjust settings will vary depending on the specific model of your display, but generally, the settings that can be adjusted include:

1. Brightness: Adjusts the overall brightness of the screen.
2. Contrast: Adjusts the difference between the lightest and darkest areas of the screen.
3. Color temperature: Adjusts the color temperature of the screen, which affects the overall color balance.
4. Gamma: Adjusts the mid-tones of the screen, which can affect the overall contrast and color balance.
5. Sharpness: Adjusts the sharpness of the edges of objects on the screen.
6. Overscan: Adjusts the size of the image on the screen, allowing you to zoom in or out to fit the entire image on the screen.
7. Aspect ratio: Adjusts the proportion of the width and height of the image on the screen.
8. Color format: Adjusts the format of the color on the screen, such as RGB, YCbCr, and so on.
9. Audio settings: Adjust the volume, bass, treble and audio output settings of the display.

You may find these settings in the on-screen menu of the display and you can use the remote control or buttons on the display to access and adjust the settings. Some settings may not be available for certain models, and it's worth consulting your display's user manual for specific instructions on how to access and adjust the settings on your particular model.

Solution : Perform an Automatic Gradation Adjustment (Color Calibration) Automatic Gradation Adjustment compensates for tones when the color tones shift in color copies / prints. Compensating for color tones maintains the quality of color copies / prints made by the machine at a fixed level.

NOTE: Output of the Automatic Gradation Adjustment chart is added to the metered copy count.

NOTE: When Gradation Adjustment is selected, the following changes will be made to default copy settings set in System Settings mode:

• Copy Density = Normal or Auto
• Color Shift =Normal
• Saturation = Normal
• Color Balance = 0
• Sharpness = 0

1. Press the [Access] button (key symbol) on the Control Panel. The Access button is located above the number "3" on the numeric keypad.
   
   
2. Using the numeric keypad, enter your administrator password and select [Confirm] on the Touch Screen. The System Administration Menu screen will be displayed.
   
   NOTE: If you do not know the password, contact your administrator. The initial password at machine install is 11111. If the administrator encounters a problem with changing the password, or forgets the password, a service call must be placed.
   
   
3. Select [System Settings]. The System Settings screen will be displayed.
4. Select [System Settings] again.
5. Select [Common Settings].
6. Select [Image Quality]. The Image Quality Adjustment screen displays.
7. Select [Automatic Gradation Adjustment].
8. Load 8.5 x 11 inch (216 mm x 279 mm) or A4 (210 mm x 297 mm / 8.3 x 11.7 inch) paper in Tray 5 (Bypass Tray). Adjust the paper tray edge guide so that the guide gently touches the edge of the paper stack.
9. Select the desired gradation adjustment screen.
10. Press [Start]. The Adjustment Chart is output.
    
    NOTE: When printing the color chart for Auto Gradation and you get the message,'Auto Graduation Procedure has completed with an error' make sure that 8.5 x 11 inch (216 mm x 279 mm) paper is loaded into Tray 5 Long Edge Feed (LEF).
    
    
11. Place the Adjustment Chart face-down on the Document Glass with both the Magenta color patches against the left side of the glass.
12. Place 5 sheets of white paper on top of the Adjustment Chart and close the Document Glass Cover.
13. Press [Start].
14. To continue Automatic Gradation Adjustment with other screens, repeat steps 6 to 10. When you are finished, select [Close] until the System Settings screen is displayed.
15. Select [Exit] to exit the System Settings mode.

Hope it helps!

Solution : Perform an Automatic Gradation Adjustment (Color Calibration) Automatic Gradation Adjustment compensates for tones when the color tones shift in color copies / prints. Compensating for color tones maintains the quality of color copies / prints made by the machine at a fixed level.

NOTE: Output of the Automatic Gradation Adjustment chart is added to the metered copy count.

NOTE: When Gradation Adjustment is selected, the following changes will be made to default copy settings set in System Settings mode:

• Copy Density = Normal or Auto
• Color Shift =Normal
• Saturation = Normal
• Color Balance = 0
• Sharpness = 0

1. Press the [Access] button (key symbol) on the Control Panel. The Access button is located above the number "3" on the numeric keypad.
   
   
2. Using the numeric keypad, enter your administrator password and select [Confirm] on the Touch Screen. The System Administration Menu screen will be displayed.
   
   NOTE: If you do not know the password, contact your administrator. The initial password at machine install is 11111. If the administrator encounters a problem with changing the password, or forgets the password, a service call must be placed.
   
   
3. Select [System Settings]. The System Settings screen will be displayed.
4. Select [System Settings] again.
5. Select [Common Settings].
6. Select [Image Quality]. The Image Quality Adjustment screen displays.
7. Select [Automatic Gradation Adjustment].
8. Load 8.5 x 11 inch (216 mm x 279 mm) or A4 (210 mm x 297 mm / 8.3 x 11.7 inch) paper in Tray 5 (Bypass Tray). Adjust the paper tray edge guide so that the guide gently touches the edge of the paper stack.
9. Select the desired gradation adjustment screen.
10. Press [Start]. The Adjustment Chart is output.
    
    NOTE: When printing the color chart for Auto Gradation and you get the message,'Auto Graduation Procedure has completed with an error' make sure that 8.5 x 11 inch (216 mm x 279 mm) paper is loaded into Tray 5 Long Edge Feed (LEF).
    
    
11. Place the Adjustment Chart face-down on the Document Glass with both the Magenta color patches against the left side of the glass.
12. Place 5 sheets of white paper on top of the Adjustment Chart and close the Document Glass Cover.
13. Press [Start].
14. To continue Automatic Gradation Adjustment with other screens, repeat steps 6 to 10. When you are finished, select [Close] until the System Settings screen is displayed.
15. Select [Exit] to exit the System Settings mode.

Hope it helps!

This is from the MANUAL
www.westinghousedigital.com/pdf/197_User_Manual.pdf

PAGE 27

A-1 Settings
Use the Settings sub-menu options to manually adjust the display quality. Use the ◄/► keys to adjust the
option level.
Adjust the luminance level.
Adjust the brightness to darkness ratio.
Adjust the balance of the red, green, and blue colors in the display.
Adjust the color intensity.
Adjust the sharpness or softness of the display.
Adjust the brightness level of the screen backlight.


AND this is from the troubleshooting procedures in the manual

PAGE 64


Wrong, abnormal or missing colors

・ If any colors (red, green or blue) are missing, check the video cable to make sure it is securely connected. Loose or broken pins in the cable connector could cause an improper connection.
・ Press and select Picture | Settings to adjust the Hue and Saturation settings. You can also select
Picture | Advanced to adjust the Color Temperature settings.
・Connect the TV to another computer and check if the problem is with the computer screen.


Other than that there is no mention of color adjustment

You can adjust the colors manually on the Chroma circuit Board at the back of the CRT. Or check for any cold solder and do drysoldering. Cheers

Oh, it's the colors you are having a problem with. Then you probably want to perform an Auto Gradation Adjustment. It's on pages 162-163 of the manual found here: http://download.support.xerox.com/pub/docs/DocuColor_3535/userdocs/any-os/en/3535_User_Guide.pdf

Here is what it says:

Auto Gradation Adjustment
Auto Gradation Adjustment is a color calibration for the copier and printer. An Auto Gradation Adjustment compensates for differences between the actual and the expected toner densities for each color. An Auto Gradation Adjustment should be performed whenever there is a noticeable change in the appearance (quality) of the output, particularly changes in color
tones or densities. Performing an Auto Gradation Adjustment on a regular basis will help to maintain consistent color quality over time.

NOTE: Since an Auto Gradation Adjustment can affect all jobs for all users, it is recommended that this procedure be performed only by the Machine Administrator.

Copy Job - Text Compensates tones when a text original is copied.
Copy Job - Photo Compensates tones when a photo original is copied.
Print Job Compensates tones when printing with controller line screen.
Network Controller - 1 Compensates tones when printing with Network Controller screen type 1.
Network Controller - 2 Compensates tones when printing with Network Controller screen type 2.

NOTE: Printing the chart for Auto Gradation does not increase the meter count.
NOTE: When gradation adjustment is executed, the following
changes will be made to default copy settings set in System Settings mode: Copy density = Normal or Auto, Color Shift = Normal, Saturation = Normal, Color Balance = 0, Sharpness = 0.
NOTE: When Print or Network Controller gradation adjustment is executed, the printer’s output profiles for the available screen types are compensated.

1 On the Image Quality Adjustment screen, select Auto Gradation Adjustment.
2 Load 8.5x11 inch or A4 paper into Tray 5 (Bypass). Move the paper guide to gently touch the edge of the paper.

3 Select the desired gradation adjustment screen:
• Copy Job - Text
• Copy Job - Photo
• Print Job
• Network Controller - 1
• Network Controller - 2
Press Start. The Adjustment Chart is output.
4 Place the Adjustment Chart face down on the Document Glass with both Magenta color patches against the left side of the glass.
5 Place 5 sheets of white paper on top of the Adjustment Chart and close the DADF. Select Start.
6 To continue Auto Gradation Adjustment with other screens, repeat steps 2 to 5. When you are finished, select Close until the System Settings screen is displayed.
7 Select Exit to exit the System Settings mode.

1)Remove rear cover..clean RGB lens with soft cloth....
replace cover...........
2)Remove front speaker grill & access panel.....
locate RGB screen control block.....slighty adjust RGB
for best color mix.......check B/W tracking by reducing
customer color control to minimum....does pix look gray ?
touch up RGB screen again.....then increase color to middle
of range.....how is that ?......................................T.

Solution: Manually adjust color from the driver (Windows)

Manual Color Adjustment Follow the steps below to make fine adjustments to the color hue for the printed output. These settings will only make minor color adjustments. If more drastic color adjustment is necessary, use an image editing application.

1. On the Windows desktop, click 'Start', point to 'Settings', then click 'Printers' (Windows XP: On the Start menu, click 'Printers and Faxes', Windows Vista Click / Select Start from the bottom left of the Windows screen, 'Control Panel', 'Hardware and Sound', and then click on 'Printers'.).
   
   Note: If you are in 'Classic' view, Click 'Printers' directly from the 'Control Panel'.
   
   
2. Windows 2000/XP/Vista: Right-click the printer icon, then click 'Printing Preferences'. Windows 98/Me: Right-click the printer icon, then click 'Properties'.
   
   
3. On the Main tab, select 'Manual' for 'Color Adjustment.'
   
   
   
   
4. On the Manual Color Adjustment screen, adjust each color individually to achieve the desired effect.
   
   Note: This screen may vary depending on model.
   
   
   

Solution: Manually adjust color from the driver (Windows)

Manual Color Adjustment Follow the steps below to make fine adjustments to the color hue for the printed output. These settings will only make minor color adjustments. If more drastic color adjustment is necessary, use an image editing application.

1. On the Windows desktop, click 'Start', point to 'Settings', then click 'Printers' (Windows XP: On the Start menu, click 'Printers and Faxes', Windows Vista Click / Select Start from the bottom left of the Windows screen, 'Control Panel', 'Hardware and Sound', and then click on 'Printers'.).
   
   Note: If you are in 'Classic' view, Click 'Printers' directly from the 'Control Panel'.
   
   
2. Windows 2000/XP/Vista: Right-click the printer icon, then click 'Printing Preferences'. Windows 98/Me: Right-click the printer icon, then click 'Properties'.
   
   
3. On the Main tab, select 'Manual' for 'Color Adjustment.'
   
   
   
   
4. On the Manual Color Adjustment screen, adjust each color individually to achieve the desired effect.
   
   Note: This screen may vary depending on model.
   
   
   

Hello paulaspec,

You have a problem with the three factors, and they are screen voltage, focus voltage, and control (focus 2) voltage. Basically these voltages have to be adjusted since the components in this section have aged some. These controls are usually located in the television on the IHVT (Integrated High Voltage Transformer) or as it is also called the flyback transformer. these controls must be adjusted together, along with the color controls. Here is how the adjustment is done (You will need a schematic diagram, a DC volt meter, and a color bar generator to do these measurments):

 

1) turn color and tint fully counter clockwise until you have a black and white picture.

 

2) connect the color bar generator to the TV (ch 3) and turn it on, you should see bars in various shades of gray

 

3) adjust as best as possible the color and tint controls to obtain the color bars on the screen Red Green Blue.

 

4) measure the voltages on the focus, screen and control grids of the CRT and match them to the schematic digram measurements.

 

5) adjust the focus screen and control grids to match the ones on the schematic diagram

 

6) once this is done then you adjust the color controls once again to obtain the red green and blue bars on the TV screen.

 

This should help if the CRT (picture tube) electron guns are still good and if the flyback transformer voltage supply is working.

 

However if you do not have a background in electronics please take the TV to a shop for repairs.

 

I hope this helps,

Thank you,

Shuttle83