50
CHROMA/PHASE ADJUSTMENTS (NTSC)
Measuring Instruments Signal generator (NTSC 75% color bar signal)
Oscilloscope
Card (Slot) NTSC/PAL Video Input Card (Slot 2)
Test Points TP-47B [CRT SOCKET PWB]
TP-GND [CRT SOCKET PWB]
Adjustment Points S*03 (Chroma), S*04 (Phase) [Service Menu]
Notes: • Ensure that the output waveforms from the NTSC/PAL
Video Input Cards are normal before proceeding to the
following adjustments (see page 72).
• Perform the following adjustments after completing the
1080/60i signal Chroma/Phase Adjustments.
• Set the CHROMA and PHASE data in the Setup Menu to
“00”.
• The SO value (see the description of the Component Sig-
nal Chroma/Phase Adjustments) becomes the reference
value for the following adjustments. When this data is
changed, it is required to re-adjust the data of all of the
adjustment signals (Component, NTSC and PAL).
When re-adjusting the 1080/60i signal, use the SI. (For
the adjustment of the 1080/60i signal, use the Compo-
nent/RGB Input Card.)
1. Apply the NTSC color bar signal to INPUT C (Terminal VIDEO1 on
the NTSC/PAL Video Input Card).
2. Set the CHROMA and PHASE potentiometers on the front panel to
the center click positions.
3. Connect the oscilloscope across TP-47B and TP-GND.
4. Adjust SA03 in the Service Menu to set the level difference be-
tween waveforms 1 and 4 in the figure on the right to 0 V ± 2 V.
5. Adjust SO04 to set the level difference between 1 and 3 to 0 V ± 2 V.
6. Apply the NTSC color bar signal to INPUT D (Terminal Y/C on the
NTSC/PAL Video Input Card) and perform the adjustments in steps
2 to 5 above. See Table 6 for the adjustment data.
4
3
2
1
Table 6
Adjustment
Adjustment Data
Signal
Chroma Phase
NTSC (VIDEO) SA03 SA04
NTSC (Y/C) SB03 SB04
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