TOSHIBA 40WH08B
Manual de Servicio

Note: The aim of the above-described adjustment procedure for the Green lens focus is to obtain the best lens focus after 2 - 3 hours of warming up taking into account the focus drift; it applies if the warming up time before the adjustment is less than 30 minutes. (The horizontal line in the screen middle section tends to be slightly redflared.) In case of warming up of more than 2 hours under a condition that the large anode current is running through the projection tube so that for example the all-white pattern appears, adjust to obtain the sharpest focus while observing the whole screen like in the RED case. 11. Use the focus VR of �G� of the focus pack in order to adjust the electric focus in the middle section of the screen to its sharpest level. Note: Normally the most clearly visible point of the scanning line is the sharpest point of the Green focus, however as the characteristics vary depending on the projection tube, the sharpest focus points of the vertical and horizontal lines may not match each other, thus when you turn the focus VR, if the picture tends to be tremendously unstable (rolls horizontally or vertically), adjust the balance of the vertical and horizontal lines to its best position. 12. Check the GREEN focus of the whole screen and if necessary repeat steps 10 and 11. 13. Fix the GREEN lens by tightening up its fixing screws. 14. Expose only BLUE by covering the RED and GREEN lenses with caps. 15. Display the internally-generated black cross-hatch. 16. Loosen the BLUE lens fixing screws (refer to Fig. a), and adjust the BLUE lens focus while observing the middle and peripheral screen sections. 17. Use the focus VR of �B� of the focus pack in order to adjust the focus in the middle section of the screen to its sharpest level. (The point of the Blue focus becomes sharpest when the brightness level of BLUE is lowest, the cross-hatch is clearly visible.)

Note: Keep in mind that only the BLUE electric focus is adjusted with the black cross-hatch. 18. Check the BLUE focus of the whole screen and if necessary repeat steps 17 and 19. 19. Fix the BLUE lens by tightening its fixing screws.

TILT ADJUSTMENT Rotate R, G, B deflection yoke so that picture becomes horizon, then fasten screw. CENTERING ADJUSTMENT 1. Stretch a thread between two center of screen edge (top and bottom, left and right).

2. 3.

Select the adjustment mode. (See page 10.) Press TV/VIDEO button on the Remote Control to display the black cross-hatch.

4. 5. 6. 7. 8.

Adjust G centering magnet so that the cross-hatch pattern center comes to screen center. Perform HEIGHT adjustment . (See page 14.) Perform WIDTH adjustment. (See page 14.) Check whole quality of green line. Adjust R, B centering magnet so that the cross-hatch pattern center comes to screen center.

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GENERAL ADJUSTMENTS