REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Saturday, 9 February 2019

MITSUBISHI WT-46809_WS-55809_WS-55819_WS65809_WS-65819 _ RPTV _ CONVERGENCE ADJUSTMENT PROCEDURE

MITSUBISHI WT-46809_WS-55809_WS-55819_WS65809_WS-65819 _ RPTV _ CONVERGENCE ADJUSTMENT PROCEDURE


CONVERGENCE ADJUSTMENT MODE

  • The Convergence mode is used to perform raster geometry correction, and convergence adjustments.  These adjustments must be made in both the SD (NTSC) and HD modes.
CONVERGENCE MODE ACTIVATION
  • Press MENU-0-1-5-9
  • When the Convergence Mode is activated, the display below appears on a Green Crosshatch.
SELECTING HD OR SD MODE

Select the Signal Source before entering the Convergence Mode, either an NTSC or HD source.
Enter the Convergence Mode
  • If the signal source is NTSC, the SD mode is activated.
  • If the signal source is HD, the HD mode is activated.
ACTIVATING THE HD MODE WHEN NO HD SIGNAL IS AVAILABLE.
  • Activate the Factory Option Menu (MENU-0-1-7-0)
  • Use the “Adjust” keys to select “DTV Port” and use the “Enter” key to change the setting from “AUTO” to “1080i”.

  • Exit the Option Menu (Press MENU twice)
  • Select the DTV Inputs as the signal source (INPUT button)
  • Activate the Convergence Mode ... the Convergence mode will be in the HD mode and the internal crosshatch is displayed.
AFTER ADJUSTING CONVERGENCE, BE SURE TO SET THE "DTV PORT" BACK TO AUTO.
  1. Select an analog Input as the signal source (INPUT button)
  2. Activate the Factory Option Menu (MENU-0-1-7-0)
  3. Use the “Adjust” keys to select “DTV Port” and use the “Enter” key to change the setting from “HD” to “AUTO”.
  4. Exit the Option Menu (Press MENU twice)
CONVERGENCE MODE FUNCTIONS
In the Convergence Mode there are three main Functions (Categories).
  • Pressing “6” activates CONV MISC
  • Pressing “5” activates COARSE CONV
  • Pressing “4” activates FINE CONV
CONV MISC [PRESS-6]
This mode is used to preset data values controlling the Convergence Generator, and to perform the HV Regulation adjustment.
  • Use the VIDEO button to select an item.
  • Use the ADJUST buttons to change data.
NOTE: When Item “0 HVOL” is selected the screen goes black except for the data display. This occurs since a black screen is required when making the HV Regulation adjustment.

COARSE CONV [PRESS -5]
There are four Sub Functions in the Coarse mode, COARSE GREEN, COARSE RED, COARSE BLUE and DF.
  1. COARSE GREEN .... used to make Coarse Raster Geometry Adjustments.
  2. COARSE RED ... used to make Coarse Red Convergence Adjustments.
  3. COARSE BLUE ... used to make Coarse Blue Convergence Adjustments.
  4. DF ... used to preset data values controlling the Dynamic Beam Focus circuit drive signal.

  • Use AUDIO button to select a Sub Function
  • Use the VIDEO button to select an Adjustment Item.
  • Use the ADJUST buttons to change data.
FINE CONV [PRESS-4]
 Sub Functions
This mode is used to perform Fine Raster Correction, and Fine Red and Blue Convergence Adjustments.
There are three Sub Adjustment Functions, selected with the AUDIO button:
  • FINE GREEN .... a Green Crosshatch is displayed, to make Fine Raster Corrections.
  • FINE RED .... a White Crosshatch is displayed, to make Fine Red Convergence Adjustments.
  • FINE BLUE .... a White Crosshatch is displayed, to make Fine Blue Convergence Adjustments.
CURSOR
In the Fine mode a Cursor is added to the Crosshatch. The ENTER button toggles the Cursor between two modes:
  1. MOVE (blinking Cursor) use the ADJUST buttons to select any of 64 points on the Crosshatch.
  2. ADJUST (Non blinking Cursor) the ADJUST buttons adjust the active color at the current Cursor position, horizontally or vertically.
CURSOR COORDINATES

Specific intersections in the Crosshatch are assigned vertical and horizontal coordinates. These are shown in the adjacent diagram. The Cursor can only be moved to those positions that have coordinates assigned. If the Cursor is at coordinates outside the screen area, the Cursor will not be visible. Use the ADJUST buttons to move the Cursor to an intersection on the screen.

DISPLAY

The on-screen display changes in the Fine mode, as shown at the right. The display shows the vertical and horizontal data for the current Cursor Position, and the horizontal and vertical coordinates for that position.

SAVING DATA AND EXITING THE CONVERGENCE MODE
Press MENU twice to exit the Convergence mode, data is automatically saved
Posted By: FRANK at 01:17
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