Lens Focus; Character Position - Mitsubishi Electric WT-46807 Service Manual

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
[Video Circuit]

15. Lens Focus

Measuring
-----
Instrument
Test Point
------
------
Ext. Trigger
Measuring
-----
Range
Input Signal
Monoscope
Input Terminal
Video Input
[On Screen Display]

16.Character Position

Measuring
-----
Instrument
Test Point
-----
Ext. Trigger
------
Measuring
------
Range
Input Signal
Video Signal
Video Input
Input Terminal
CIRCUIT ADJUST MODE
Activate ........ MENU-8-2-5-7
Function .................AUDIO
Item No. .................VIDEO
Adjust Data ...........ADJUST
Save Data .... .........ENTER
Exit ..............MENU (twice)
Purpose: To set the Lens position for optimum focus.
Poor focus
Symptom:
Note: This adjustment must follow item 6 (Electrostatic Focus). Perform this
adjustment for RED, GREEN, and BLUE monochrome pictures.
1. Supply a VIDEO signal (Monoscope).
2. Cover the Red and Blue Lens (producing a green raster).
3. Adjust the Green Lens for best focus at the center of the Monoscope pattern.
Note: Attach a white paper to the
screen center. During adjustment,
observe the picture on the screen
from inside for easier adjustment.
4. Repeat Steps 2 and 3 for the Red
and Blue monochrome pictures.
To position the character display horizontally.
Purpose
Symptom:
Incorrect display position
1. Supply a video signal to a Video Input
2. Enter the Adjustment Mode HR function.
3. Adjust so the width of (A) and (B) are equal as shown below.
3. Save data and exit the Service Mode.
Page 39