Service manual

Page 44
Purpose:
Measuring
Instrument
Test Point
Measuring
Range
Input Signal
Ext. Trigger
Input Terminal
Symptom:
Purpose
Measuring
Instrument
Test Point
Measuring
Range
Input Signal
Ext. Trigger
Input Terminal
Symptom:
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
To improve edge focus.
Poor focus at the edges of the screen.
[Focus Circuit]
13. Dynamic Focus Preset
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Monoscope
Video Input
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 DF Table.
5. Press “6” to activate CONV-MISC
6. Set “0 FPHS” and “1 DPHS” to data values given in the CONV-MISC Table.
5. Exit the Conv. Mode.
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Monoscope
Video Input
Poor focus
Note: This adjustment must be done before 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.
[Video Circuit]
14. Lens Focus
To set the Lens position for optimum focus.
CONVERGENCE MODE
Activate ……..MENU-2-1-5-9
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)
DF
(MENU-2-1-5-9-5)
Item Abbr. Data
1 DFH -500
2 DFV -100
CONV MISC
(MENU-2-1-5-9-6)
Item Abbr. Data
9DPHS0
10 DOFS 51