White Balance Adjustment; Ad Calibration Adjustment - Sony PFM-32C1 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 either [Small] or [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 [Green Gain] to 00 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 [Green Gain] to 00 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 [Green Gain] to 00 normally. However, if the white
balance adjustment cannot be performed by all means,
decrease the [Green Gain] until the specification is
satisfied.

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
Setup menu to [On].
2. AD Adjustment of RGB Input
1) Connect the RGB signal VGA (640 x 480 /60) all
white 90 IRE to INPUT1.
2-20
2) Obtain the RGB balance by adjusting [Red Gain] and
[Blue Gain] of [RGB Calibration] until the R detection
value and the B detection value come very close to the
G detection value.
3) Adjust [Sub Cont RGB] until the R, B and G detection
values become the setup value. (Setup value = 230 ± 3)
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 = 51 ± 3)
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) Connect 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 = 230 ± 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 = 51 ± 3)
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) Connect the NTSC all white 90 IRE video signal to
INPUT.
3) Adjust [Sub Cont Video] of [Video Calibration] until
the G detection value becomes the setup value. (Setup
value = 230 ± 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 = 51 ± 3)
PFM-32C1/32C1E