Panasonic PT-52DL52, Service Manual

Page: 43 / 189

go on to the next step.
Write the data into the following address.
IIC5 [SLV: a0 SUB: d7]
The maximum value is [64].
5. As to the chromaticity coordinates (x, y) measured:
When y< -1.51621× + 0.689852
keep reducing the WB B value with a decrement of 1.
On reaching y -1.51621× +0.689852
go on to the next step.
Write the data into the following address.
IIC5 [SLV: a0 SUB: d8]
The maximum value is [64].
6. As to the chromaticity coordinates (x, y) measured:
When y> 1.208333× -0.02142
keep reducing the WB G value with a decrement of 1.
On reaching y 1.208333× -0.02142
go on to the next step.
Write the data into the following address.
IIC5 [SLV: a0 SUB: d6]
The maximum value is [64].
7. Measure the chromaticity coordinates (x, y), and confirm that the
following three equations are fulfilled.
y -3.09278× +1.217835
y -1.51621× +0.689852
y 1.208333× -0.02142
If not fulfilled, return to the procedure 4 above.
8. After the chromaticity coordinates come within the above range,
measure the luminance at the center of the screen to confirm that
it has brightness of 240 nit or higher.
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