White Balance Adjustments 1.0; Video (Except Secam) Adjustment - Sony TRINITRON PVM-14N5A Service Manual

3-8. G2 ADJUSTMENT
1. Receive the 525 or 625 monoscope signal.
2. Set as follows in the service mode.
No. Item Data
PVM-14NS5U/14N6U PVM-20N5U/20N6U
14N5E/14NGE 20NSE/20N6E
14NSA/14N6A 20NS5A/20N6A
14NSMDE SSM-20N5U
SSM-14N5U 20NSE
14N5A 20N5A
14N5E
33 SUB BRT CVBS 31
40 C/O G ROUGH 3 7
42 C/O OFFSET CVBS 31
44 CIOGFINE CVBS 31
Data Setting by Service Mode
3. Connect the probe of the oscilloscope to the Q714
collector.
4. Adjust the Q714 collector IK pulse level to the
following voltage using RV701 (G2).
20-inch (RV701/CB board): G cathode = 149 +1V
14-inch (RV701/CA board): G cathode = 136+ 1 V
V BLANKING : PICTURE
es IK pulse
level of IK pulse
~ 0 Voc
3-8
3-9. WHITE BALANCE ADJUSTMENTS
3-9-1. VIDEO (Except SECAM) Adjustment
1. Select the LINE A input.
Set the monitor to the levels in the following table in
the service mode.
No. Item Data
PVM-14N5U/14N6U 9 PVM-20N5U/20N6U
14N5E/14N6E 20NSE/20N6E
14N5A/14N6A 20N5A/20N6A
14NSMDE SSM-20NSU
SSM-14N5U 20N5E
14N5A 20N5A
14N5E
33 SUB BRT CVBS 31
34 SUB BRT RGB 31
39 C/OR ROUGH 3 7
40 C/O G ROUGH 3 7
41 C/O BROUGH 3 7
45 C/OBFINE CVBS 31
52 C/O GFINE RGB 31
Data Setting by Service Mode
2. Input the all gray signal (Fig. |) into LINE A.
3. Adjust the luminance to 3 +0.2 nit using
42 [C/O OFFSET CVBS].
4. Adjust the white balance to the color temperature
shown in Table | using 43 and
45 [C/O B FINE CVBS].
5. Repeat steps 3 and 4 so that the luminance and white
balance become the specifications shown in Table |.
6. Input the window signal (Fig. 2) into LINE A.
7. Adjust the luminance to 150 +1 nit using 46
[DRV ALL CvBs].
8. Adjust the white balance to the color temperature
shown in Table | using 47 and 49
[DRV B CvBs].
9. Repeat steps 7 and 8 so that the luminance and white
balance become the specifications shown in Table |.
10. The cutoff varies by changing the drives. Therefore,
repeat steps 3 to 9 until the luminance and color
temperature of the arive and cutoff meet the
specification.
11. Repeat steps 2 and 10 so that the luminance and white
balance of the cutoff side (Fig. 1) and drive side (Fig.
2) become the specifications shown in Table 1.
12. Save the data.
SITA Cnassis