Convergence Circuit Geometry Adjustments - Mitsubishi Electric WT-42311 Service Manual

[Convergence Circuit]
15. Convergence Geometry
Adjustments
-----
Measuring
Instrument
------
Test Point
------
Ext. Trigger
Measuring -----
Range
NTSC -- None
Input Signal
HD -- HD sync
Video & DTV Inputs
Input Terminal
CONVERGENCE MODE
Activate ........MENU-2-2-5-9
Misc. ........................."6"
Coarse........................"5"
Fine ..........................."4"
Color (R,G or B)......AUDIO
Item No..................VIDEO
Adjust/Move..........ADJUST
Cursor Toggle.........ENTER
Save & Exit.....MENU (twice)
MODEL: WT-42311 / WT-A42
Purpose: To set the Convergence circuit geometry adjustments.
Symptom:
Raster distortion at the top, bottom or sides of the picture.
Note: Deflection Circuit Geometry must be performed before this adjustment.
NTSC mode
1. Select a Video Input with no signal.
2. Activate the Convergence Mode, Coarse Green.
3. Adjust the Coarse Green Items shown below for straight crosshatch lines.
4. Select the Fine Green Mode, a Cursor is displayed on the crosshatch.
5. Use the Cursor to adjust for straight crosshatch lines.
6. Exit the Convergence Mode.
HD mode
1. Supply horizontal and vertical HD sync to the DTV Inputs and select the DTV
Inputs as the source.
Note: I f an HD signal is not available, use the Conv. HD with No Signal
Procedure
2. Enter the Convergence Mode, Coarse Green.
3. Repeat NTSC Steps 3 through 6 in the HD mode.
CONV. HD WITH NO SIGNAL
1. MENU-2-2-7-0
2. Set DTV Port to 1080i
3. MENU (Twice)
4. INPUT select DTV inputs
5. MENU-2-2-5-9
After Adjusting, set the
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DTV Port to AUTO