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PDF 28Z33B Data sheet ( Hoja de datos )

Número de pieza 28Z33B
Descripción Colour television SERVICE MANUAL
Fabricantes Toshiba 
Logotipo Toshiba Logotipo



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No Preview Available ! 28Z33B Hoja de datos, Descripción, Manual

FILE NO. 030-200314
SERVICE MANUAL
Colour television
Z33 Chassis
28Z33B/32Z33B
Published in Japan Dec. 2003 (YC)

1 page




28Z33B pdf
CONVERGENCE ADJUSTMENTS
s CIRCUMFERENCE CONVERGENCE ADJUSTMENT
NOTE: Before attempting any convergence adjustments, the
receiver should be operated for at least fifteen min-
utes.
s CENTER CONVERGENCE ADJUSTMENT
1. Use the cross-dot pattern from among the built-in test sig-
nals.
2. Set the brightness and contrast for well defined pattern.
3. Adjust two tabs of the 4-Pole Magnets to change the an-
gle between them (See figure 2.) and superimpose red
and blue vertical lines in the center area of the picture
screen.
4. Turn the both tabs at the same time keeping the angle
constant to superimpose red and blue horizontal lines at
the center of the screen.
5. Adjust two tabs of 6-Pole Magnets to superimpose red/
blue line and green one. Adjusting the angle affects the
vertical lines and rotating both magnets affects the hori-
zontal lines.
6. Repeat adjustments 3, 4, 5 keeping in mind red, green
and blue movement, because 4-Pole Magnets and 6-Pole
Magnets have mutual interaction and make dot movement
complex.
1. Loosen the clamping screw of deflection yoke slightly to
allow the yoke to tilt.
2. Temporarily put a wedge as shown in figure 1. (Do not
remove cover paper on adhesive part of the wedge.)
3. Tilt front of the deflection yoke up or down to obtain better
convergence in circumference. (See figure 3.) Push the
mounted wedge into the space between picture tube and
the yoke to fix the yoke temporarily.
4. Put other wedge into bottom space and remove the cover
paper to stick.
5. Tilt front of the yoke right or left to obtain better conver-
gence in circumference. (See figure 3.)
6. Keep the yoke position and put another wedge in either
upper space. Remove cover paper and stick the wedge
on picture tube to fix the yoke.
7. Detach the temporarily mounted wedge and put it in an-
other upper space. Stick it on picture tube to fix the yoke.
8. After fixing three wedges, recheck overall convergence.
Tighten the screw firmly to fix the yoke and check the yoke
is firm.
9. Stick three adhesive tapes on wedges as shown in figure
1.
4-POLE
MAGNETS
6-POLE
MAGNETS
ADJUST THE ANGLE
(VERTICAL LINES)
FIXED
ROTATE TWO TABS
AT THE SAME TIME
(HORIZONTAL LINES)
PURITY
MAGNETS
CONVERGENCE MAGNET ASSEMBLY
Figure 2.
BLU RED
ADJUSTMENT OF MAGNETS
RED/BLU GRN
BLU
RED
RED/BLU
GRN
4-POLE MAGNETS MOVEMENT
6-POLE MAGNETS MOVEMENT
Center Convergence by Convergence Magnets
BGR
RB
GG
BR
RGB
INCLINE THE YOKE UP (OR DOWN)
B
G
R
RGB
BGR
R
G
B
INCLINE THE YOKE RIGHT (OR LEFT)
Circumference Convergence by DEF Yoke
Figure 3. Dot Movement Pattern
5

5 Page





28Z33B arduino
DESIGN MODE
1. ENTERING TO DESIGN MODE
1) Select the Service mode. 2) While pressing o or CALL button on
Remote and press MENU button on TV.
3) Press MENU button on TV.
S
D Press
ITEM
DATA
Press
(Design mode)
(Adjustment mode)
When QA02 is initialized, items OPT0, OPT1and OPT2of DESIGN MODE are set to the data of the representative
model of this chassis family.
Therefore, because ON-SCREEN specification remains in the state of the representative of model. This model is required to
reset the data of items OPT0, OPT1and OPT2.
2. SELECTING THE ADJUSTING ITEMS
Every pressing of CHANNEL t button in the design mode changes the adjustment items in the order of table-3.
(s button for reverse order)
Refer to table-3 for data of design mode.
(See SETTING & ADJUSTING DATA on page 15)
3. ADJUSTING THE DATA
Pressing of VOLUME s or t button will change the value of data.
11

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