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Auto Focus; Zoom/Focus Tracking Adjustment - Hitachi VK-S274R Service Manual

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Adjustment > Auto Focus

6-6 Auto Focus

Input D to PC on the main menu screen to display the AF
menu screen. Input the appropriate adjustment number to
PC. Pressing the Esc key on the AF menu screen will restore
the main menu screen.

6-6-1 Zoom/focus tracking adjustment

Incompleted Phenomenon
Focus is lost during zooming.
Condition
1) Point at the backfocus chart, 1500 ± 5mm away from the
lens surface.
2) Light the backfocus chart with 200 - 400 lx.
Note:
1) Measure the distance between the chart and lens surface
precisely.
2) Place the chart as parallel as possible to the lens surface.
3) The backfocus chart should always be at the center of the
monitor screen when the zoom is set to the wide-angle
and telephoto ends.
4) The zoom trace adjustment procedure is completed
within 2 minutes after it is selected.
5) Do not place any obstruction between the lens and chart
during adjustment.
Procedure
1) Input 1 to PC on the AF menu screen.
2) Follow the instructions on PC display thereafter.
Main menu
***********************************************************
***********************************************************
Input D.
AF menu
***********************************************************
***********************************************************
[1]
[2]
[3]
[ESC] RETURN TO MENU
AF menu
***********************************************************
***********************************************************
[1]
[2]
[3]
[ESC] RETURN TO MENU
Input 1.
6 - 11
MANUAL ADJUSTMENT PROGRAM
[A]
DATA INITIALIZE
[B]
ELECTRIC VOLUME
[C]
ADJUSTMENT
[D]
AUTO FOCUS
[E]
SPOT NOISE
[ESC] END
Please select [A] - [E] or [ESC]
AUTO FOCUS ADJUSTMENT
ADJUSTMENT OF ZOOM/FOCUS TRACKING
ADJUSTMENT OF AF NOISE LEVEL
CHECK OF ZOOM/FOCUS TRACE
Please select [1] - [3] or [ESC]
AUTO FOCUS ADJUSTMENT
ADJUSTMENT OF ZOOM/FOCUS TRACKING
ADJUSTMENT OF AF NOISE LEVEL
CHECK OF ZOOM/FOCUS TRACE
Please select [1] - [3] or [ESC]
Follow the instructions on
PC display thereafter.

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