White Balance Adjustment; Ad Calibration Adjustment - Sony FWD-50PX1 Service Manual

2-3. White Balance Adjustment

1. Enter the Service Mode as follows. Generate the built-
in adjustment signal.
Select [Service Mode] → [White Balance] → [Win-
dow], and select [Large].
2. Set the color temperature to [High] as follows.
Select [Color Temp.] → [High].
3. Adjust white balance using the R, G and B gain
adjustments as follows.
Adjust white balance by adjusting [Red Gain], [Green
Gain] and [Blue Gain] until color temperature satisfies
the specification of 9300 K. During this adjustment,
set [Blue Gain] to 255 normally.
4. Set the color temperature to [Mid] as follows.
Select [Color Temp.] → [Mid].
5. Adjust white balance using the R, G and B gain
adjustments as follows.
Adjust white balance by adjusting [Red Gain], [Green
Gain] and [Blue Gain] until color temperature satisfies
the specification of 6500 K. During this adjustment,
set [Red Gain] to 255 normally.
6. Set the color temperature to [Low] as follows.
Select [Color Temp.] → [Low].
7. Adjust white balance using the R, G and B gain
adjustments as follows.
Adjust white balance by adjusting [Red Gain], [Green
Gain] and [Blue Gain] until color temperature satisfies
the specification of 3200 K. During this adjustment,
set [Red Gain] to 255 normally.
W/B setting value
1) High 9300 K
x = 0.283
2) Mid 6500 K
x = 0.313
3) Low 3200 K
x = 0.423

2-4. AD Calibration Adjustment

1. Adjustment Preparation
1) Set the [RGB Mode] of the Custom Setup menu to
[PC].
2) Set [Cal Mode] of [AD Converter] of the Service
Mode menu to [On].
2-20
y = 0.298
y = 0.329
y = 0.399
2. AD Adjustment of RGB Input
1) Input the RGB signal VGA (640 x 480 /60) all white
90 IRE to INPUT1.
2) Adjust the [Sub Cont RGB] of the [RGB Calibration]
until the G detection value becames the setup value.
(Setup value = 220 ± 3)
3) Adjust the [Red Gain] and [Blue Gain] until the R and
B detection values become the G detection value.
4) Set the RGB signal to the VGA (640 x 480 /60) all
gray 20 IRE.
5) Adjust [Red Bias], [Green Bias] and [Blue Bias] until
the R, B and G detection values become the setup
value. (Setup value = 48 ± 2)
6) Repeat the above steps 1) to 5) until all the adjustment
values are satisfied at the same time.
3. AD Adjustment of Component Input
1) Set INPUT1 to the Component input.
2) Input the component signal 1080/60i all white 90 IRE
to INPUT1.
3) Adjust [Sub Cont YUV] of [YUV Calibration] until
the G detection value becomes the setup value. (Setup
value = 220 ± 3)
4) Set the component signal to the 1080/60i all gray 20
IRE.
5) Adjust [Sub Brt YUV] until the G detection value
becomes the setup value. (Setup value = 48 ± 2)
6) Adjust [Cb Offset YUV] until the B detection value
agrees with the G detection value.
7) Adjust [Cr Offset YUV] until the R detection value
agrees with the G detection value.
8) Repeat the above steps 5) to 7) until all adjustment
values are set to the setup value of step 5).
9) Repeat the above steps 2) to 8) until all adjustment
values are set to the setup values of steps 3) and 5).
4. AD Adjustment of Video Input (When the
Video Input connector is installed)
1) Set the INPUT to the Video input.
2) Set the video signal to the NTSC all white 90 IRE.
3) Adjust [Sub Cont Video] of [Video Calibration] until
the G detection value becomes the setup value. (Setup
value = 220 ± 3)
4) Set the video signal to the NTSC all gray 20 IRE.
5) Adjust [Sub Brt Video] until the G detection value
becomes the setup value. (Setup value = 48 ± 2)
FWD-50PX1