Toshiba 50A50 55A60 Service Manual page 12

ITEM
HEIGHT
(HIT)
WIDTH
(WID)
VERTICAL LINEARITY
(VLIN)
WHITE BALANCE
(RCUT)
(GCUT)
(BCUT)
(RDRV)
(BDRV)
ADJUSTMENT PROCEDURE
1. Call up the adjustment mode display, then select the item HIT.
2. Press the VOLUME s or t button to get the picture so the top of raster begins
to lack.
3. Press the VOLUME s button to advance the data by 10 steps.
Note : Check the vertical picture position is correct.
1. Call up the adjustment mode display, then select the item WID.
2. Press the VOLUME s or t button to get the picture so the left and right edges
of raster begins to lack.
3. Press the VOLUME s or t button to advance the data by 10 steps.
Note : Check the horizontal picture position is correct.
1. Call up the adjustment mode display, then select the item VLIN.
2. Receive cross-hatch pattern signal.
3. Press the VOLUME s or t
button to obtain the picture of
the best linearity.
4. Then readjust the item HIT.
1. Press RESET button on TV or remote hand set.
2. Call up the adjustment mode display, then adjust the data of items RCUT, GCUT
and BCUT to "40".
3. Press TV (ANT)/VIDEO button on TV.
4. Gradually rotate R, G and B SCREEN volume of FOCUS PAC (page 7) clock-
wise or counterclockwise until the raster appears slightly on the CRT through
the each lens, and leave them.
(Look into the lens in order to check the raster.)
5. Press TV (ANT)/VIDEO button on TV again.
6. Exit from service mode.
7. Receive white laster pattern signal, and adjust the contrast to the minimum to
make white picture to low light.
8. Adjust the data of items RCUT, GCUT and BCUT for low light area.
9. Adjust the contrast to the maximum to make white picture to high light.
10. Adjust the data of items GDRV and BDRV Controls for proper white-balanced
picture in high light area.
11. Check the white balance in both low and high light areas. If necessary, perform
again steps from 7 to 9.
The data of item GDRV changes red drive actually.
*
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