akira CT-21XF9, Service Manual

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15
Model No: CT-21XF9A
Version 1.0
CONVERGENCE ADJUSTMENTS
NOTE: Before a attempting any convergence adjustments, the receiver should be operated for at
least fifteen minutes.
CENTRE CONVERGENCE ADJUSTMENT
1. Receive the pane pattern test signal.
2. Set the brightness and contrast for well-defined pattern.
3. Adjust two tabs of the 4-Pole Magnets to change the angle between them (See figure 7) and
superimpose red and blue vertical lines in the centre 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 centre of the screen.
5. Adjust two tabs of 6-Pole Magnets to superimpose red/blue line (land green line. Adjusting
the angle affects the vertical lines and rotating both magnets affects the horizontal 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.
CIRCUMFERENCE CONVERGENCE ADJUSTMENT
1. Loosen the clamping screw of defection coil slightly to allow the coil to tilt.
2. Temporarily put a wedge as shown in figure 6. (Do not remove cover paper on adhesive part
of the wedge.)
3. Tilt front of the deflection coil up or down to obtain better convergence in circumference. (See
figure 8) Push the mounted wedge into the space between picture tube and the coil to fix the
coil temporarily.
4. Put other wedge into bottom space and remove the cover paper to stick.
5. Tilt front of the deflection coil right or left to obtain better convergence in circumference. (See
figure 8)
6. Keep the deflection coil position and put another wedge in either upper space. Remove cover
paper and stick the wedge on picture tube to fix the coil.
7. Detach the temporarily mounted wedge and put it in another upper space. Stick it on picture
tube to fix the coil.
8. After fixing three wedges, recheck overall convergence. Tighten the screw firmly to fix the
coil and check the coil is firm.
9. Stick three adhesive tapes on wedges as shown in figure 6.
SERVICE MODE GENERAL INSTRUCTIONS
1. ENTERING TO SERVICE MODE
Use the user remote receiver K10N-C1. Set the volume to minimum. Press the MUTE button on
Remote Control. Keep pressing the MUTE button, press MENU button on TV set until the
character D and an adjustment item appears on the screen.
2. SELECTING THE ADJUSTING ITEMS
Every pressing of the RED or GREEN button on remote control transmitter changes the
adjustment items in the following BUS DATA table.