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2-2. Adjustments on BVP-550/550P
2-2-5. VA Output Level Confirmation
2-2-6. Pre Knee Adjustment
2-2-5. VA Output Level Confirmation
Equipment : Oscilloscope
Preparation:
. Extend VA-163 board with EX-464 board.
Confirmation:
1. WHITE BAL switch (on the side panel) → PRST
2. Set the DISP switch (on the side panel) from OFF to
MENU while holding down the MENU SEL switch
(on the front panel).
3. Set the menu as follows.
MENU : System config
PAGE
: PR/VA/Test (S3)
: Test → 1
ITEM
4. Confirm the G white level.
Test Point
: TP52 (GND:GND (A))/
Extension board
(extending VA-163)
: A = 670 ± 2 mV
Specification
A
(Oscilloscope)
5. Confirm the R white level.
Test Point
: TP54 (GND:GND (A))/
Extension board
(extending VA-163)
: A = 670 ± 40 mV
Specification
6. Confirm the B white level.
Test Point
: TP50 (GND:GND (A))/
Extension board
(extending VA-163)
: A = 670 ± 40 mV
Specification
7. If the specification is not satisfied, carry out Section
4-3-7 "Test 1 Adjustment" in the BVP-550/550P
maintenance manual and readjust each level for the
above specifications.
Resetting after the Confirmation:
. Set the menu as follows.
MENU : System config
PAGE
: PR/VA/Test (S3)
: Test → Off
ITEM
2-8 (E)
2-2-6. Pre Knee Adjustment
Equipment : Oscilloscope, Waveform monitor
Preparation:
. Extend VA-163 board with EX-464 board.
Iris of the lens : CLOSE
Adjustment Procedures:
1. Set the DISP switch (on the side panel) from OFF to
MENU while holding down the MENU SEL switch
(on the front panel).
2. Set the menu as follows.
MENU
: Paint
PAGE
: W.Clip/Knee (P6)
: Knee → On
ITEM
3. Set the RGB/ENC switch (on the side panel) to ENC.
4. Set the GAIN switch (on the side panel) to M (9 dB).
5. Set the WHITE BAL switch (on the side panel) to
PRST.
6. Set the menu as follows.
MENU
: System config
PAGE
: PreKnee/Zebra (S4)
: Test → 2
ITEM
7. Set the menu as follows, and adjust the pre knee 1 for
G by using the MENU SEL switch.
Test Point
: TP52 (GND:GND (A))/
Extension board (extending VA-163)
Adjustment Point:
MENU
: System config
PAGE
: PreKnee/Zebra (S4)
ITEM
: PreKnee1[G]
Specification : A = 1.80 ± 0.01 V p-p
A
(Oscilloscope)
BKP-5090
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