AKIRA CTV3423
Manual de Servicio

11

OPTION 5 (Dwork3 )(number 9 and A) x x x x |x x x x ---> ISUD0 | | | | | | +------> ISUD1 | | | | | +--------> PAL_M/N ON/OFF | | | | +----------> Reserved for internal using, must be zero | | | +------------> ISUD3 | | +--------------> ISUD4 | +----------------> ISUD5 +------------------> Reserved for internal using, must be zero

(III) COLOUR PURITY AND CONVERGENCE ADJUSTMENT 3. COLOUR PURITY ADJUSTMENT (See Fig.1)
BEFORE ANY ADJUSTMENTS DESCRIBED BELOW ARE ATTEMPTED,V-HIGH, B+ VOLTAGE AND FOCUSING ADJUSTMENT MUST BE COMPLETED. 1. Place the TV receiver facing NORTH or SOUTH. 2. Plug in TV receiver and turn it on . 3. 3.Operate and warm-up the TV receiver at least over 30 minutes. 4. Fully degauss the TV receiver by using an external degaussing coil 5. Receive a crosshatch pattern and adjust the static convergence control roughly. 6. Loosen the clamp screw of the deflection yoke and pull the deflection yoke towards you. 7. Enter into ADJUST MENU .set the values of C-R,C-G,C-B to �00�. 8. Adjust the purity magnets so that green field is obtained at the center of the screen. 9. Slowly push the deflection yoke toward bell of CRT and set it where a uniform green field is obtained. 10. Tighten the clamp screw of the deflection yoke. 2. CONVERGENCE ADJUSTMENT (See Fig.1) 1. Receive a dotted pattern. 2. Unfix the convergence magnet clamped and align red with blue dots at the center of the screen by rotating (R,B) static convergence magnets. 3. Align Red/Blue with green dots at the center of the screen by rotating (RB-G) static convergence magnet. 4. Fix the convergence magnets by turning the clamped. 5. Remove the DY wedges and slightly tilt the deflection yoke horizontally and vertically to obtain the good overall convergence. 6. Fix the deflection yoke by wedges. 7. If purity error is found, follow �PURITY ADJUSTMENT� instructions.

Model No: CT-25XG9A_25XG9AN Version 1.0