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– 7 –
Fig. 4-6
8
Adjust R785 so that the H Sawtooth shading of Gch
becomes minimum as shown in Fig. 4-6.
8
Trigger the Oscilloscope at TP5 on the DSP Board.
8
Adjust R803 so that the V Top shading of Gch becomes
minimum as shown in Fig. 4-6.
8
Adjust R767 to compensate the width of the V Top
shading.
8
Repeat to adjust R776, R785, R803 and R767 until the
shading of Gch output becomes minimum as shown in
Fig. 4-6.
8
Connect the CH2 of the Oscilloscope to E105.
8
Trigger the Oscilloscope at TP4 on the DSP Board.
8
Adjust R774 so that the H Parabola shading of Rch
becomes minimum as shown in Fig. 4-6.
8
Adjust R783 so that the H Sawtooth shading of Rch
becomes minimum as shown in Fig. 4-6.
8
Trigger the Oscilloscope at TP5 on the DSP Board.
8
Adjust R801 so that the V Top shading of Rch becomes
minimum as shown in Fig. 4-6.
8
Repeat to adjust R774, R783 and R801 until the shading
of Rch output becomes same as Gch.
8
Change the connection of the CH2 of the Oscilloscope to
E505.
8
Trigger the Oscilloscope at TP4 on the DSP Board.
8
Adjust R778 so that the H Parabola shading of Bch
becomes minimum as shown in Fig. 4-6.
8
Adjust R787 so that the H Sawtooth shading of Bch
becomes minimum as shown in Fig. 4-6.
8
Trigger the Oscilloscope at TP5 on the DSP Board.
8
Adjust R805 so that the V Top shading of Bch becomes
minimum as shown in Fig. 4-6.
8
Repeat to adjust R778, R787 and R805 until the shading
of Bch output becomes same as Gch.
(9). High Sensitivity Shading Adjustment
Test Point:
R801 (Observing Point 1)
Analog Process Board
R805 (Observing Point 2)
Analog Process Board
Adjust:
R760 (H-TOP)
Analog Process Board
R805 (B-VTOP)
Analog Process Board
R803 (G-VTOP)
Analog Process Board
R801 (R-VTOP)
Analog Process Board
8
Insert the High Sensitivity Card AW-PB303/AW-PB303E
to the AW-E800/AW-E800E.
8
Set the Gain to 30 dB and the Accumulation Time to two
seconds on the AW-PB303/AW-PB303E.
8
Connect the Oscilloscope to the Observing Point 1 (R801)
as shown in Fig. 4-7.
Fig. 4-7
8
Adjust R760 so that Va voltage becomes minimum as
shown in Fig. 4-8.
Fig. 4-8
8
Change the connection of the Oscilloscope to the
Observing Point 2 (R805) as shown in Fig. 4-7.
8
Adjust R805 so that Vpp voltage becomes maximum as
shown in Fig. 4-9.
Fig. 4-9
8
Change the connection of the Oscilloscope to the Video
Output Connector of the AW-E800/AW-E800E.
Sawtooth
Parabola
After Adjustment
Top
R801
R805
Observing Point 1
Observing Point 2
Va becomes
minimum
minimum
Vpp becomes
maximum
maximum
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