Y/C Level Adjustment - Sony PFM-510A1WU Service Manual

7. Adjust the COMPONENT R-Y so that the TP501 (R
IN) level and the R level will be the same. (Fig. 3-5)
White
Fig. 3-5
8. Ensure tracking between 6 and 7.
9. Adjust the SUB PHASE so that all the signal levels of
the TP503 (B IN) will be the same. (Fig. 3-6)
Standard level difference: Within 0.03 V
Fig. 3-6
10. The levels are not the same, ensure tracking among 6, 7
and 9.
11. Change the signal to the YUV of the PAL, and make
the same adjustment as the NTSC.
Note: In the case of PAL, adjustment will be almost satisfactory when NTSC
data are copied. So adjust only incorrect points after copying the data.
3-8
To be level
R
To be level
Level difference:
within 0.03 V

3-3-3. Y/C Level Adjustment

1. Input the gray scale of the NTSC to the Y/C input.
2. Select the Y/C with a Remote commander to enter the
adjustment mode.
3. Observe the TP2: BR board (G OUT) using an
oscilloscope, and adjust the SUB CONTRAST so that
the signal level will be 0.70 V ± 0.01 V p-p. (Fig. 3-7)
Fig. 3-7
4. Input the RGB A. GAIN level that was adjusted by the
YUV of NTSC to the RGB A. GAIN.
5. Change the signal of 75 % color bar.
6. Adjust the SUB CHROMA so that the TP503 (B IN)
white level and the B level will be the same. (Fig. 3-8)
White
Fig. 3-8
7. Adjust the SUB PHASE so that all output will be the
same. (Fig. 3-9)
Standard: Within 0.03 V
Fig. 3-9
8. Ensure tracking between 6 and 7.
9. Change the signal to the PAL and make the same
adjustment as the case of the NTSC.
Note: In the case of the PAL, copy the NTSC data and then adjust incorrect
points.
0.70 ±0.01 V p-p
To be level
B
To be level
Level difference:
within 0.03 V
PFM-510A1WU/PFM-510A1WE