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EN 60
8.
8.4
Alignments 42" HD v3
1. Get Pattern to be Full White.
2. Adjust Vsch to Clock-wise max by using VR5004 (Vsch
should be connected to "+" unit of DMM).
3. Check the waveform using Oscilloscope.
•
Triggering through V_TOGG of LOGIC Board.
•
Connect the OUT 4 Test Point at the centre of Y_buffer
to other channel, and then check the first SF operating
waveform of 1TV-Field.
•
Check the waveform as before by adjusting Horizontal
Division. Check the Reset waveform when the
V_TOGG Level is changed.
•
Set the Vset to 20 µs by adjusting VR5002. GND
maintenance section should be checked after the
Vertical Division is readjusted to '2 V or 5 V'.
Adjust VR5002 to set the time of
Yrr (Rising Ramp) 20 µs
Adjust VR5003 to set the time of
Yfr (Falling Ramp_1st) 20 µs
(V)
50V/div.
DC=0V
Figure 8-22 Rising ramp
SDI PDP
Alignments
rising maintenance time
Figure 8-21 TCP ramp waveform inclination adjustment (Y-Board)
20ms/div.
(t)
•
Set the Falling maintenance time to 20 µs by adjusting
R5006.
•
Change the waveform position of Oscilloscope to 3SF
and then set the Falling maintenance time to 10µs by
adjusting the VR5003. GND maintenance section
should be checked after the Vertical Division is
readjusted to '2 V or 5 V'.
Special notice: When you adjust the inclination of waveform,
do check and adjustment being based on the Reset waveform
of 1st Sub-field of 1st Frame and then move to 3rd Sub-field for
adjusting.
falling maintenance time
Adjust VR5004 to set the voltage of
Vsch (Scan high voltage) 40 V
Adjust VR5001 to set the time of
Yfr (Falling Ramp_3rd) 10 µs
(V)
20V/div.
40V
(t)
Figure 8-23 Falling ramp
50ms/div.
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