Alignment Magnet & Electrostatic Focus; Charactrer Position - Mitsubishi WS-48315 Service Manual

[CRT Circuit]
11. Electrostatic Focus & Beam
Forming Magnet
Measuring
-----
Instrument
Test Point
-----
------
Ext. Trigger
Measuring
------
Range
Input Signal
Monscope & Crosshatch
Input Terminal
Video Input
[On Screen Display]
12.Character Position
Measuring
-----
Instrument
Test Point
-----
Ext. Trigger
------
Measuring
------
Range
Input Signal
Video Signal (HD/NTSC)
ANT-A/DTV
Input Terminal
CIRCUIT ADJUST MODE
Activate ........ MENU-0-3-5-7
Function .................AUDIO
Item No. .................VIDEO
Adjust Data ...........ADJUST
Save Data .... .........ENTER
Exit ..............MENU (twice)
MODELS: WS-48315 / WS-55315 / WS-65315
Purpose:
To set electrostatic focus to the optimum point.
Symptom: Poor focus.
Note: This adjustment must be performed after the Sub Contrast adjustment.
Alignment Magnet Adjustment This adjustment must be performed before Static
Focus Adjustment
1. Set the display to the "Standard" mode (Format button)
2. Supply a Crosshatch with Center Dot signal to a Video Input.
3. Select a Green raster using the table below.
4. Roughly adjust Green Focus VR.
5. Rotate Green Focus VR CCW so the center dot is about 10mm diameter.
6. Adjust the Green 4 Pole Magnet for the roundest center dot.
7. Set the Green Focus VR for optimum focus.
8. Repeat the procedure with a Red raster and adjust the Red 4 Pole Magnet.
9. Use silicon to lock the magnets in place.
Static Focus Adjustment (All Models)
1. Supply a Monoscope signal to a Video Input
2. Activate A/V Reset
3. Select Red, Green or Blue rasters using the table below.
3. Set the Red, Green and Blue Focus VRs for optimum focus at the top center of
the picture..
Raster Color Se lection
Color Raster
To position the character display horizontally.
Purpose:
Symptom:
Incorrect display position
1. Supply a Monoscope signal to the Video or RF Input.
2. Select the Monoscope as the source for the main picture (Input button).
3. Activate the Service Mode, HR Function.
4. Use the Adjust Right/Left buttons to center the display horizontally.
(A = B)
5. Save data and exit the Service Mode..
Page 35
Activation Code
Red MENU-0-3-5-9-1
Green MENU-0-3-5-9-2
Blue MENU-0-3-5-9-3