Vco Cont Frequency Check; Ad Clock Phase Adjustment - Sony Digital Betacam DVW-707 Maintenance Manual

8-2. VCO CONT Frequency Check

8-3. AD Clock Phase Adjustment

8-2. VCO CONT Frequency Check
Note
. Conduct this check when the TG-206/206P, ES-23/23P
boards or CCD block is only replaced.
. Before measurement, turn the power ON and warm up
the camcorder for about 10 munites.
Preparation
. Connect as follows.
VIDEO
OUT
DVW-707/707P SG
. On the setup menu, set as follows.
PAGE : S12*FUNCTON 1/2
ITEM : TEST OUT
Adjustment Procedure
1. Equipment : Frequency counter, Oscilloscope
Test point : VIDEO OUT connector
GND : E1 (DCP-17 board)
Spec. : 3,579,545 10 Hz (NTSC)
4,433,618
If the measured value is out of the specification, adjust it as
follows.
2. On the setup menu, adjust as follows.
PAGE : S40*ENC ADJ.
ITEM : INT SC FREQUENCY
Spec. : 3,579,545 10 Hz (NTSC)
4,433,618 5 Hz (PAL)
B
1
A
2
E1
3
4
5
6
8-4
GEN SC
IN
LOCK OUT
Frequency
counter
ENC
5 Hz (PAL)
C D E F
DCP-17 board (A side)
8-3. AD Clock Phase Adjustment
Note
Conduct this check when the CCD block or DCP-17 board
is only replaced.
Preparation
. On the setup menu, set as follows.
PAGE : S12*FUNCTON 1/2
ITEM : TEST OUT
. OUTPUT/DCC switch (inside panel)
. WHITE BAL switch (inside panel)
. AUTO W/B BAL switch (front panel)
(Perform the automatic white balance adjustment.)
. Shoot a multiburst chart in the underscanned monitor
frame.
Equipment : Waveform monitor
Test point : TEST OUT connector
: 1 Lens IRIS
setting point
Spec. : A (white level) = 90
A = 630 10 mV (PAL)
A
. Pan the camera so that the 5 MHz signal portion of the
multiburst chart is positioned at the center of the monitor
screen. (Do not change the camera zoom.)
Adjustment Procedure
1. On the setup menu, adjust as follows.
PAGE : S54*AD ADJ.
ITEM : AD CLOCK PHASE
Spec. : Maximize the 5 MHz signal portion.
2. On the setup menu, adjust as follows.
PAGE : S54*AD ADJ.
ITEM : R/B CLOCK PHASE
Spec. : Adjust the 5 MHz signal portion to
nearly horizontal.
5 MHz
ENC
CAM/ON
A
WHT
2 IRE (NTSC)
5 MHz
NG OK
DVW-790WS/709WS/707
DVW-790WSP/709WSP/707P P2V1