Signal Chroma/Phase Adjustments - Panasonic BT-H1700P Service Manual

SIGNAL CHROMA/PHASE ADJUSTMENTS

CHROMA/PHASE ADJUSTMENTS (COMPONENT)
Measuring Instruments
Card (Slot)
Test Points
Adjustment Points
Notes: • Perform the following adjustments after completing the
Contrast adjustment.
• Set the CHROMA and PHASE data in the Setup Menu to
"00".
• The value adjusted at the SO adjustment 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.
1. Apply the 1080/60i component color bar signal to INPUT A.
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 SO03 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. Vary the adjustment signal and adjustment data, and re-perform
adjustments in steps 1 to 5 above (see Table 5).
Adjustment
Signal
COMMON
1080/60i
1080/24psf
720/60p
480/60i
576/50i
480/60p
Signal generator (Component color bar signal)
Oscilloscope
Component/RGB Input Card (Slot 1)
TP-47B [CRT SOCKET PWB]
TP-GND [CRT SOCKET PWB]
S*03 (Chroma), S*04 (Phase) [Service Menu]
Adjustment Data
Chroma Phase
SO03 SO04
SI03 SI04
SJ03 SJ04
SK03 SK04
SE03 SE04
SF03 SF04
SG03 SG04
Table 5
3
2 4
1
49