Autofocus Adjustment Procedure; Zoom/Focus Tracking Adjustment - Hitachi VK-S274 Service Manual

8.

Autofocus Adjustment Procedure

The following explains the adjustment procedure using the adjustment program (SMAP), following the order of items on PC
display.
Refer to "4. Starting Adjustment Program (SMAP)" in advance, start SMAP and display the main menu on PC display.
In actual work, it is possible to adjust one item independently.
Note: If error message appears on PC display during adjustment, perform troubleshooting, referring to "10. Error Messages".
Before starting adjustment:
1) Input D to PC on the main menu screen to display the AF menu screen.
2) Input the appropriate adjustment number to PC. (*1)
*1: Pressing the Esc key on the AF menu screen will restore the main
menu screen.

8.1 Zoom/Focus Tracking Adjustment

Incompleted Phenomenon:
Focus is lost during zooming.
Condition:
Point at the backfocus chart, 1500 ± 5mm away from the lens surface.
Light the backfocus chart with 200 - 400 lx.
Caution when Adjustment:
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
***********************************************************
MANUAL ADJUSTMENT PROGRAM
***********************************************************
[A] DATA INITIALIZE
[B] ELECTRIC VOLUME
[C] ADJUSTMENT
[D] AUTO FOCUS
[E] SPOT NOISE
[ESC] END
Please select [A] - [F] or [ESC]
Input D.
AF menu
***********************************************************
AUTO FOCUS ADJUSTMENT
***********************************************************
[1] ADJUSTMENT OF ZOOM/FOCUS TRACKING
[2] ADJUSTMENT OF AF NOISE LEVEL
[3] CHECK OF ZOOM TRACE
[ESC] RETURN TO MENU
Please select [1] - [3] or [ESC]
AF menu
***********************************************************
AUTO FOCUS ADJUSTMENT
***********************************************************
[1] ADJUSTMENT OF ZOOM/FOCUS TRACKING
[2] ADJUSTMENT OF AF NOISE LEVEL
[3] CHECK OF ZOOM TRACE
[ESC] RETURN TO MENU
Please select [1] - [3] or [ESC]
Input 1.
Follow the instructions on PC display
thereafter.
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