Dynamic Range (Auto Knee) Adjustment - Panasonic AJ-D610WBP Service Manual

6-7. Dynamic Range (Auto Knee)
Adjustment
BOARD CAM SYSCON, PREAMP
TP CAM OUT (75 ohm termination)
Service Adj. 2/2
ADJUST
In the Service Menu
F.NUMBER See Below
CHART Gray Scale
M. EQ. WFM, Vector Scope
SPEC. See below
Note : Set the WFM Monitor as follows.
RESPONSE = LUM, GAIN = X5
1. Set the EVR as follows.
COM : [1E] DATA : [3A] ADR : [00]
(White Clip level set to 110%)
2. Set the WHITE BAL SW from PRST to A.
3. Shoot the Gray Scale chart and adjust the zoom
position so that the both ends of Gray Scale are
fitted to the both ends of the monitor screen.
4. Adjust the iris so that the white peak level of Gray
Scale is 80%, and execute AWB.
5. Execute ABB, then perform the step 4 again.
6. Adjust the iris so that the level is 100% at the
CAM OUT, and confirm the value of F-number.
7. Set the iris to F5.6. And set the aspect ratio to 4:3
mode.
8. Open the page of the SERVICE ADJ 2/2 in the
service menu.
9. Adjust R GAMMA (4) of SERVICE ADJ 2/2 so
that the brightest portion (100% WHITE) of Gray
Scale is 103 – 104%.
10. Set the iris to "open".
11. Decrease the value of B GAMMA (4). When the
value of B GAMMA (4) is decreased, the signal
level also decreases. When the value of B
GAMMA (4) reaches a certain value, the signal
level does not decrease any more even if the
value of B GAMMA (4) is decreased. Confirm the
value of B GAMMA (4) when the signal level just
stop decreasing. Fix the value of B GAMMA (4) to
that value.
12. Set the iris so that the signal level is 100%.
13. Set the EVR as follows.
COM : [1E] DATA : [3B] ADR : [00]
(White Clip level set to 105%)
14. Open the iris slowly from F11 and adjust R
GAMMA (4) of the SERVICE ADJ 2/2 so that the
Auto Knee function is started from 104%-105%
video level.
15. Open the iris slowly from close position. Confirm
that peak level of white portion is 104%(+1% -
0.5%) during Auto Knee function is working. If it is
not, adjust R GAMMA (4). If R GAMMA (4) is
adjusted again, go back to previous step and
adjust R GAMMA (4) until both conditions is
cleared.
16. If it is not cleared both step14 and 15, adjust
KNEE GAIN so that white peak level is
104%(+1% -0.5%).
17. Repeat the steps 14 – 16 until the gradation falls
[Enter]
into being represented no more. And confirm the
value of F-number. (Repeat of the steps 14-16
must be ended at step 15 or 16.)
18. Compare the F-number at the above step 6 with
that confirmed at the step 17, and confirm that the
difference of F-number is more than 2 stops.
19. Set the EVR as follows.
COM : [1E] DATA : [3A] ADR : [00]
(White Clip level set to 110%)
20. Adjust B GAMMA (4) of SERVICE ADJ 2/2 so
that the brightest portion (100% WHITE) of Gray
Scale is 110%.
21. Confirm that the graduation is represented at the
range of F-numbers from F11 to the F-number
confirmed at the above step 17. If it is not, repeat
all steps again.
These portions
st
(1 and 2
[Enter]
ELE- 35
nd
brightest ones)
[Enter]
Gradation is
represented.
Gradation is not
represented.