Dynamic Focus Preset; Electrostatic Focus; Models: Wt-46807 / Ws-55807 / Ws-55857 / Ws-55907 / Ws-65807 / Ws-65857 / Ws-65907 / Ws - Mitsubishi Electric WT-46807 Service Manual

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

13. Dynamic Focus Preset

Measuring
-----
Instrument
Test Point
-----
Ext. Trigger
------
Measuring
-----
Range
Monoscope
Input Signal
Video Input
Input Terminal
CONVERGENCE MODE
Activate ........MENU-8-2-5-9
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)
[CRT Circuit]

14. Electrostatic Focus

Measuring
-----
Instrument
Test Point -----
------
Ext. Trigger
Measuring
------
Range
Input Signal
Monscope
Video Input
Input Terminal
Purpose:
To improve edge focus.
Symptom:
Poor focus at the edges of the screen.
1. Supply a Monoscope signal to a Video Input
2. Activate the Convergence Mode.
3. Select the DF Function under the Conv. Coarse Mode.
4. Set Items "0 DFH" and "1 DFV" to the data values given in the Table.
5. Exit the Conv. Mode.
DF
Item #
Purpose
To set electrostatic focus to the optimum point.
Poor focus.
Symptom:
Note: This adjustment must be performed after the Sub Contrast adjustment.
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 Selection
Color Raster
Red
Green
Blue
Page 38
Abbrev. Data
0 DFH 175
1 DFV 100
Activation Code
MENU-8-2-5-9-1
MENU-8-2-5-9-2
MENU-8-2-5-9-3