Color Adjustment Procedures; Preparations; Confirming Operations; Adjustment Of Reference Frequency - Sony DSC-1024HD Service Manual

Note: In the DSC-1024HD, the following 10 color tables are
provided with color data.
COLOR_NDX = 0 : VIDEO 1 NTSC Y/C
COLOR_NDX = 1 : VIDEO 1 NTSC COMPOSITE
COLOR_NDX = 2 : VIDEO 1 PAL Y/C
COLOR_NDX = 3 : VIDEO 1 PAL COMPOSITE
COLOR_NDX = 4 : VIDEO 2 NTSC COMPOSITE
COLOR_NDX = 5 : VIDEO 2 PAL COMPOSITE
COLOR_NDX = 6 : VIDEO 2 YBR
COLOR_NDX = 7 : VIDEO 2 RGB
COLOR_NDX = 8 : VIDEO 3 YBR
COLOR_NDX = 9 : VIDEO 3 RGB
Alt + S command can copy all items in these tables to another
table.
Example) YBR V3→YBR V2
The contents of COLOR_NDX=8 table are copied to
COLOR_NDX=6 table.
3-5.

Color Adjustment Procedures

3-5-1. Preparations

Prepare the following devices.
1) NTSC signal generator (COMPOSITE, Y/C, YBR, RGB
out)
2) PAL signal generator (COMPOSITE, Y/C out)
3) Video monitor (NTSC, PAL COMPOSITE, Y/C, YBR,
RGB in) (ex. PVM1454Q)
4) Oscilloscope
5) Vector scope

3-5-2. Confirming Operations

1) Set OUTPUT FORMAT of the DSC-1024HD to NTSC.
2) Press TEST PATTERN button of the DSC-1024HD.
3) Set the RGB OUT slide switch of the DSC-1024HD to
COMP SYNC side.
4) Make sure that the COMPOSITE, Y/C, RGB images appear
on the video monitor.
5) Press the TEST PATTERN button several times until the
LED goes off to cancel the TEST PATTERN.
6) Input a signal from the signal generator and make sure that
COMPOSITE, Y/C, RGB in images appear on the video
monitor.
COM1
CN252
Y/C RGB
Y/C,Composite,RGB,YBR
or or
Composite YBR
NTSC/PAL
AC100-240
Signal
Generator
Connection Diagram
Oscilloscope
DSC-1024HD
Video Monitor
(ex.PVM-1454Q)

3-5-3. Adjustment of Reference Frequency

1) Set the output format to NTSC.
2) Press the test pattern button to display color bars.
Under this condition, execute aging for more than 15 min-
utes.
3) Adjust CV200 so that the frequency at TP1502 is approxi-
mately 14318180.
4) Set the output format to PAL.
5) Press the test pattern button to display color bars.
6) Adjust CV201 so that the frequency at TP1502 is approxi-
mately 17734475.
7) Repeating steps 3) ~6), adjust so that the frequency at
TP1502 in the NTSC mode is 14318180 ± 10 Hz.
Also, adjust so that the frequency at TP1502 in the PAL
mode is 17734475 ± 10 Hz.

3-5-4. Adjustment of Subcarrier Frequency

1) Enter NTSC composite signal to the INPUT1.
Enter VGA (graphic) color bar signal to the INPUT3.
Connector a video monitor to the composite video output.
2) Set the INPUT SELECT to "3".
3) Set the OUTPUT format to NTSC. Select GENLOCK
mode.
4) Adjust CT1501 so that the frequency at TP1501 is 3579545
± 5 Hz.
5) Turning on/off the POWER switch, adjust CT1501 finely so
that color bars are displayed within 1 second after the screen
appeared.
Repeating this more than three times, make sure there is no
abnormality.
6) Enter PAL composite signal to the INPUT1.
7) Set the OUTPUT format to PAL. Select GENLOCK mode.
8) Adjust CT1500 so that the frequency at TP1501 is
4433618.75 ± 5 Hz.
9) Turning on/off the POWER switch, adjust CT1500 finely so
that color bars are displayed within 1 second after the screen
appeared.
Repeating this more than three times, make sure there is no
abnormality.

3-5-5. W/B Adjustment

1. Adjustment in Y color-difference input
1) Input a NTSC color bar signal (signal including 100 IRE
white) to VIDEO 3 in Y color-difference.
2) Set OUTPUT to NTSC.
3) Set the slide switch on the rear to RGB, SOG, 75Ω term
input, and RGB output.
4) Press Alt + R from the PC to set the "CONT" to BD.
5) Perform aging for more than 3 minutes.
6) Adjust RV703 so that TP711 waveform becomes 0.72V
±0.01 Vpp.
7) Set the slide switch on the rear to YBR input.
8) Press Alt + R on the PC and make sure that
"COLOR_NDX" is 8.
9) Input a NTSC gray scale signal (including 100 IRE white).
10) Set "CONT" to D9 using the PC.
11) Adjust "EXT Y" from the PC so that TP711 waveform be-
comes 0.72V ±0.01 Vpp.
12) Adjust "RED DATA" from the PC so that TP712 waveform
becomes 0.72V ±0.01 Vpp.
3-2
DSC-1024HD