Picture Tube Components Adjustment - Toshiba DW65X91 Service Manual

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
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.
Centering magnet
After adjusting picture tilt, picture position is finally
fixed by this magnet.
In order to get maximum margin of user convergence
control for center of screen, this magnet have to be
used for center convergence adjustment.
PREPARATION
Operate the receiver for at least 5 minutes.
R, G, B CUTOFF (SCREEN VR) ADJUSTMENT
1. Adjust before replacing the SCREEN assembly.
2. Press RESET button on TV or remote hand set.
3. Call up the adjustment mode display, then adjust the
data of items RCUT, GCUT and BCUT to "40".
4. Press TV (ANT)/VIDEO button on TV.
5. Gradually rotate R, G and B SCREEN volume of FO-
CUS PAC (page 8) clockwise or counterclockwise un-
til the raster appears slightly on the CRT through the
each lens, and leave them.
(Look into the lens in order to check the raster.)
6. Press TV (ANT)/VIDEO button on TV again.
RGB ALIGNMENT & ASTIGMATISM ADJUSTMENT
1. Set the knobs of the pole 2, 4, 6 magnets of the SVM
coil so that their magnetic fields override each other.
Pole 6
2. Enter the adjustment mode (see page 11).
3. Adjust the centering magnets for the RED, GREEN,
4. Press the TV/VIDEO button on the remote controller
5. Adjust the alignment and astigmatism of the projec-
(1) Slightly turn the focus VR of RED to the left.
(2) Adjust the pole 2 magnet so that the bright section of
(3) Readjust the centering magnets for the RED colors.
(4) Slightly turn the focus VR of RED to the right for the
(5) Adjust the pole 4 magnet to the desired degree so that
Pole 4
Pole 2
– 6 –
Pole 2 magnet
and BLUE colors. (See CENTERING ADJUSTMENT.)
to display the internally-generated white cross dots.
(White cross dots on black background. Refer to TEST
SIGNAL SELECTION on page 12.)
tion tube for RED. (See steps (1) to (6) below. Cover
the projection tubes for the other two colors with lens
caps, etc.)
the dot falls on the center of the dark section (flare).
Dark section (flare)
Bright section
sharp focus.
the blurred dot becomes rectangular. (The shape
should become basically same when turning the fo-
cus VR to both the left and right.)
Pole 4, 6 magnet