Sony BVP-550, Руководство по обслуживанию

Страница: 885 / 924

4-31(E)
BVP-550
BVP-550P
4-4. Overall Electrical Alignment
4-4-9. A/D Clock Phase Adjustment
Equipment : Waveform monitor
Test point : TEST OUT connector
Object : Multiburst chart
Preparations:
Connect the waveform monitor to the TEST OUT connec-
tor.
Shoot the multiburst chart so that the chart frame is aligned
with the underscaned monitor frame with the zoom control.
Pan so that the 9 MHz portion of the multiburst chart is
positioned at the center of the monitor screen.
OUTPUT/DCC switch (on the side panel)
→
CAM/OFF
RGB/ENC switch (on the side panel)
→
ENC
Adjustment procedures:
1. Adjust the iris control of the lens.
A = 90
±
2 IRE (for NTSC)
A = 630
±
10 mV (for PAL)
2. Clock Phase [G]
Menu setting
:
MENU : System config
PAGE : PR/VA/TEST (S3)
ITEM : G Clock
Specifications
: Maximize the 9 MHz signal portion.
3. Clock Phase [R/B]
Menu setting :
MENU : System config
PAGE : PR/VA/TEST (S3)
ITEM : R/B Clock
Specifications : Adjust the 9 MHz signal portion
nearly horizontally.
4-4-10. VA Gain Adjustment
Notes:
• Use the reflective chart (reflection ratio:89.9%)in this
adjustment, if possible.
• If a pattern box is used, it should be well-maintained.
• Set the luminouse intensity of the chart to 2000 lx.
• Never change the setting of the following trimmer
capacitors.
These capacitors are extremely difficult to adjust in the
field.
VA-163 board :
1
CT200,
1
CT300,
1
CT400
Equipment : Waveform monitor
Object
: Grayscale chart
Preparations:
WHITE BAL switch (on the side panel)
→
PRST
GAIN switch (on the side panel)
→
L (0 dB)
Extend VA-163 board with EX-464 board.
Adjustment procedures:
1.
MENU setting
:
MENU : Paint
PAGE : Knee/W.Clip (P6)
ITEM : Knee
→
Off
2. Adjust automatically the black balance.
AUTO W/B BAL switch (on the front panel)
→
BLK
3. Connect the oscilloscope to the TP74 (GND:TP73)/
Extension board extending VA-163.
Specifications : Adjust the iris control of the lens.
A = 125 mV