Toshiba 65H81, Service Manual

Page: 6 / 131

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GENERAL ADJUSTMENTS
WARNING : BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRE-
CAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL.
PICTURE TUBE COMPONENTS ADJUSTMENT
DESCRIPTION OF NECK COMPONENTS
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Deflection yoke and convergence yoke
The position on the neck is required most front
(CRT funnel side) and the screw is fastened after
rotating yoke adjusting picture tilt.
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Centering magnet
After adjusting picture tilt, picture position is finally
fixed by this magnet.
In order to get maximum margin of user conver-
gence control for center of screen, this magnet
have to be used for center convergence adjust-
ment.
PREPARATION
Operate the receiver for at least 5 minutes.
RGB ALIGNMENT ADJUSTMENT
1. Set the knobs of the pole 2, 4, 6 magnets of the SVM
coil so that their magnetic fields override each other.
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Pole 2
Pole 6
Pole 4
Pole 2 magnet
Pole 4, 6 magnet
2. Select adjustment mode (see page 9).
3. Adjust the centering magnets for the RED, GREEN and
BLUE colors. (See CENTERING ADJUSTMENT.)
4. Press “7” button to display the built-in cross-hatch.
5. Press “0” and “RTN” buttons to make the picture a single
Red color.
100 button ............... to erase Red color
0 button ............... to erase Green color
RTN button ............... to erase Blue color5.
6. Adjust the alignment of the projection tube for RED. (See
steps (1) to (3) below.
(1) Slightly turn the focus VR of RED to the left.
(2) Adjust the pole 2 magnet so that the bright section of
the cross hatch on the center of the dark section (flare).
Dark secton (Flare)
Bright section (Core)
(3) Readjust the centering magnets for the LED colors.
(4) Reconfirm that the alignment, and centering are cor-
rect. If necessary, repeat the steps (1) to (3) above to
adjust appropriately.
7. Adjust the electric focus of RED as well as possible. (See
RGB FOCUS ADJUSTMENT.)
8. Adjust the alignment of GREEN and BLUE using the above
procedure for adjusting RED.