Alignment Magnet / Electrostatic Focus & Character Position - Mitsubishi WS-55517 Service Manual

MODELS: WS-55517 / WS-65517 / WS-73517
[CRT Circuit]
11. Electrostatic Focus &
(Alignment 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 (NTSC)
Input Terminal
ANT-A
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. Supply a Crosshatch with Center Dot signal to a Video Input.
2. Set the display format to Standard (Format button)
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 in the center of
the picture.
Ra ste r Color Se le ction
Color Raster
Red
Green
Blue
Purpose
To position the character display horizontally.
Symptom:
Incorrect display position
1. Supply an NTSC signal to Ant-A and select Ant-A as the source.
2. Enter the OSD Position Mode, press "MENU-2-4-8-8".
3. Adjust "OSDSD" to center the OSD horizontally.
4. Press "MENU" to save data and exit the mode.
Page 32
Activation Code
MENU-2-4-5-9-1
MENU-2-4-5-9-2
MENU-2-4-5-9-3