Question about Canon PIXMA MP780 All-In-One InkJet Printer

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H value changed, still colors too soft, washed out reds

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Not quite sure what you mean! but changing a value and trying to see the imediate outcome may need to be rebooted or resent in some form or another.
If you've already sent a file with one setting you will need to update that setting in some way before the effect can take place, especially if you don't see any difference from the time before.

Posted on Sep 27, 2009

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Posted on Jan 02, 2017

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What's your question? my konica minolta c451e printing machine showed me an error code p21, what could that mean and it is not printing any image but black-green shade


P-21 - Color regist test pattern failure
• The number of points detected in the main scan direction is more or less than the specified value during main scan direction registration correction.
• The number of points detected in the sub scan direction is more or less than the specified value during sub scan direction registration correction.

P-21: Color regist test pattern failure
Relevant parts:
• Transfer belt unit
• PH unit
• Printer control board (PRCB)
Step/Action:
1/ Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty.
2/ Change the image transfer belt unit if the transfer belt is damaged.
3/ Change the PH unit.
4/ Change PRCB.

(See Service Manual, pages 599, 603):
http://www.imcopexamerica.com/service-books/Bizhub/Color/bizhubC451_C550_C650FieldSvc.pdf

See also here:
Konica Minolta Bizhub c451 Reparacin de Fotocopiadoras YoReparo
Thread Problemas na C451 7 21

May 31, 2015 | Konica Minolta Office Equipment & Supplies

2 Answers

Have red tint in picture


It sounds like the color settings are out of whack, try going to the tv settings and reset them back to default. Then try changing the Red green blue values (RGB) in the color settings, simply lowering the red value might do the trick

Apr 10, 2014 | Dynex 32 in. LCD Flat-Panel HDTV

1 Answer

Logon Change


Enable Log-On Screen


Windows, by default, is set to show the Welcome screen during startup.

To enable the log-on screen to show, go to "Start" menu and select "Control Panel".

In the control panel, click on "User Accounts".


In the "User Accounts" dialog-box, click "Change the way users log on or off" and uncheck the "Welcome Screen" option.

Click "Apply Options" to save the changes.

Change Log-On Screen Background Color


To change the log-on screen background color, go to the "Start" menu and click on "Run".

In the run dialog-box, type "mspaint" as the name of the program to "Open".


Click on "OK". In the "Paint" window that opens, select "Colors" from the main menu and click on "Edit Colors". In the "Edit Colors" dialog-box, select "Define custom colors".


Here pick the color of your choice and note down the "Red", "Green" and "Blue" values.

Write down these values somewhere.


Click "Cancel" and close the paint window without saving. Now, go to the "Start" menu, click "Run" and enter "regedit" as the name of the program to "Open".


In the registry editor, navigate to HKEY_USERS\.DEFAULT\CONTROL PANEL\COLORS and double-click the "Background" string.


In the "Edit String" dialog-box that opens up, change the values in the "Value data" field to the red, green and blue color values that you wrote down (e.g. 75 78 173).


The default value will be 0 78 152. Enter the values in the correct red-green-blue order, separated by a space. Close the registry editor and log off to see the changes.


Put Image in Log-On Screen Background
To put your favorite picture in the background of the log-on screen, click "Start", then "Run", and type in "regedit". In the registry editor, navigate to HKEY_USERS\.DEFAULT\CONTROL PANEL\DESKTOP and double-click the string "Wallpaper". In the "Edit String" dialog-box that opens up, enter the full path and filename of the image that you want to use as the background. The image must be in .bmp format. Click "OK" and close the registry editor. Log off to see the changes. hope this helps




Oct 03, 2012 | Microsoft Windows XP Home Edition for PC

3 Answers

How to make folder in dos command how to rename the folder in dos command how to change the font color of the dos command


To make a folder type: mkdir FOLDER_NAME Where FOLDER_NAME is the name that you want to give your folder.

To rename a folder type: rename FOLDER_OLDNAME FOLDER_NEWNAME Where FOLDER_OLDNAME is the old name of the folder and FOLDER_NEWNAME is the new name of the folder.
To change your font colour, use the color command by typing: color XY Where X is a hex value representing the colour of the background of your window and Y is the colour of your.
The values that you can use for X and Y are:
0-black
1-blue
2-green
3-aqua
4-red
5-purple
6-yellow
7-white
8-grey
9-light blue
a-light green
blight aqua
c-light red
d-light purple
e-light yellow
f-bright white

Mar 25, 2011 | Computers & Internet

1 Answer

MY MONITER CHANGES COLOR AND ITS PISSING ME OFF HOW CAN I DO IT. IT ALWAYS CHANGES COLOR MOST OF THE TIME IT CHANGES TO RED COLOR


One or two of your color guns are failing. On a CRT, there are three color guns, Red, Green, Blue. They work together to produce all colors in the spectrum. If the monitor goes all one color, it generally means at least one color gun is failing. The cost to repair far exceeds the value of the monitor or the price of a new LCD panel.

Mar 11, 2010 | HP Pavilion MX70 17" CRT Monitor

2 Answers

Monitor colour problem


the VGA cable connecting from moniter to the computer is faulty so replace new

May 25, 2009 | Samsung SyncMaster 793MB 17" CRT Monitor

1 Answer

I want to align printf()'s text in center.


printf("Color %s, number1 %d, number2 %05d, hex %x, float %5.2f, unsigned value %u.\n",
"red", 123456, 89, 255, 3.14, 250);
will print the following line (including new-line character, \n):
Color red, number1 123456, number2 00089, hex ff, float 3.14, unsigned value 250.

The printf function returns the number of characters printed, or a negative value if an output error occurs.

for further inf u can see.

http://en.wikipedia.org/wiki/Printf

Nov 26, 2008 | Computers & Internet

1 Answer

Only color is yellow and blue


go to menu & select the picture mode with standard
then go to detail setting , change the off-set value of r(red)

Oct 17, 2008 | Samsung HP-R5072 50 in. Plasma HDTV

3 Answers

UNKNOWN VALUE OF VOLTAGE ZENER DIODES


I was not able to find any service or schematic for this model. The colors means that the value is 22.6 volts zener diode with the other blue band indicating where the cathode is.
Could you tell me where or what other components this zener diode is connected to?

Jul 02, 2008 | Televison & Video

1 Answer

Red line


Need convergence IC's and probably several resistors that have changed value. Seek professional help, someone who uses ORIGINAL ic's, not generic or knock-offs

Jan 03, 2008 | Toshiba 42H81 42" Rear Projection...

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