Centering And Static Convergence - Mitsubishi Electric WT-42313 Service Manual

[Convergence Circuit]
16. Centering and Static
Convergence
Measuring
Instrument -----
Test Point
-----
------
Ext. Trigger
Measuring
Range -----
NTSC -- Monoscope
Input Signal
HD -- Monoscope
Input Terminal
Video & DTV Inputs
CONVERGENCE MODE
Activate ........MENU-0-3-5-9
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-42313 / WT-42413
Purpose:
To converge red, green and blue at the center of the screen
Symptom:
Color edging over the entire picture.
Preliminary
Degauss the shield cover and bracket unit of the CRT assembly and chassis.
DO NOT degauss the CPM Assemblies.
HD mode
1. Supply an HD Monoscope signal to the DTV Inputs.
2. Select the DTV Inputs as the signal source (Input button).
3. Enter the Convergence Coarse mode.
4. Set the data for the "HSTA" and "VSTA" items to:
GREEN RED
HSTA = 0 HSTA = 50
VSTA = 0 VSTA = 0
5. In the Coarse Green mode:
• Center the Green Raster using the Green Centering Magnet.
• Rotate the Green Deflection Yoke to correct any tilt.
6. In the Coarse Red mode, use the Red Centering Magnet to converge
red on the green at the center of screen. Correct any red tilt with the Red
Deflection Yoke.
7. In the Coarse Blue mode, repeat Step 6 using the Blue Centering magnet and
the Blue Deflection Yoke.
8. Exit the Convergence mode.
SD mode
1. Supply an NTSC Monoscope signal to a Video Input.
2. Select the Monoscope as the signal source (Input button).
3. Enter the Convergence Coarse Green mode.
4. If needed, center the green raster using "1 HSTA" and "2 VSTA" adjustments.
5. In the Coarse Red mode, use "1 HSTA" and "2 VSTA" adjustments to converge
the red on the green at the center of the screen.
6. In the Coarse Blue mode, repeat step 5 to converge the blue of the green.
7. Exit the Convergence Mode
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BLUE
HSTA = -50
VSTA = 0