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Sync/Shading Board
24. On Video Processor 1 Board adjust the vertical sawtooth potentiometer for no sawtooth information. (Select
the viewfinder R, G and B output signals in the VF/Lens - VF Inst menu.)
Measure at:
Adjust with:
VF out R
ZR214
VF out G
ZR414
VF out B
ZR614
Video Processor 1 Board
Black Offset
25. In the Install/Gain menu set the gain for + to 12dB and for Max gain (the standard values are 6dB and 12dB).
26. While switching between 0dB gain and Max gain, adjust black level during the active line to the same as the
clamp level.
Measure at:
Adjust with:
X56-14(R)
ZR208 (R)
X56-8(G)
ZR408 (G)
X56-20(B)
ZR608 (B)
Note:
When the standard file is recalled the black levels are set as follows: Master=50, R=50, G=50, B=50.
Sync/Shading Board
27. In the Install/Gain menu reset the gain for + to 6dB and for ++ to 12dB.
28. Switch to Aspect Ratio 16:9 and check black shading.
29. Remove sync/shading board and Video Processor 1 board from service extender and return it to its position
in the camera.
White shading exposure
30. Mount lens on camera. Switch on power.
Recall Factory Standard File on MCP or OCP or Camera.
On MCP set:
OPERATE MENU
Knee
Gamma
Auto Iris
Exposure
SETUP 5 MENU
Matrix
MAINT 1 MENU
Wh. shading :
31. Point camera at a white uniformly illuminated test chart (preferable a spherical illuminator). Set diaphragm
to F5.6 and zoom for no vignetting. Adjust illumination for an 80% video level.
32. Select the red viewfinder signal.
33. Observe the CVBS output on the waveform monitor and adjust the frame flicker potentiometer for minimum
flicker between odd and even fields.
Measure at:
Adjust with:
CVBS out
R300
Adjustments
Required result:
Video signal as flat
as possible in
vertical direction.
Required result:
0mV (R)
0mV (G)
0mV (B)
:
Off
:
Lin.
:
Off
:
1/1000
:
1:1
On
Required result:
Minimum variation
between fields
Technical Manual LDK 20(S) - Studio Camera
Correct:
10mV
10µS
100
90
10
0%
Incorrect:
10µS
10mV
100
90
10
0%
4-33
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