Sharp 37GT-25S Service Manual page 11

•COLOUR ADJUSTMENT PROCEDURES
1. Y-DLY
a) Receive Philips pattern signal.
∧
b) When button is pressed, luma phase delays.
∨
c) When button is pressed, chroma phase delays.
d) Adjust the chroma-luma delay.
2. «B-GAIN», «G-GAIN», «R-GAIN»
a) Adjust G2.
b) Tune a white pattern
c) Adjust colour to minimum.
d) Position colourmeter in the center of screen.
e) Using brightness and contrast buttons, select a luminance of ≈120 nits.
f) Operate again in Service Mode and select location R-GAIN and B-GAIN
to obtain colour coordinates:
g) Exit Service Mode and check colour coordinates «X» and «Y» at 20 and 120 nits. It may be
necessary to repeat the same procedure or re-adjust the cuts as show the be below one.
NOTE: Locations «R» alter «X» coordinates; «G» alter «Y» coordinates; «B» alter «X» and «Y» coordinates.
X = 0.290 ± 0.015
Y = 0.300 ± 0.015
MEMO
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37GT-25S