Autofocus - Hitachi DZ-GX5020A K Service Manual

Adjustment > Adjustment Procedure

6-4-4 Autofocus

Preparations:
1) Use the backfocus chart vertically (portrait
mode) as shown in Fig. 6-4-3.
2) Point at backfocus chart 1500mm ± 5 mm
away from the lens surface: Measure the
distance precisely.
3) Set the zoom to telephoto end, and make sure
that the center of backfocus chart appears.
4) If an illuminometer is available and the
brightness of illumination can be varied, set
the illuminance of backfocus chart surface
to 200-400 lx. This setting is not necessary
if the brightness of illumination cannot be
varied: Perform adjustment under indoor
light that is as bright as possible.
Fig. 6-4-3 Backfocus Chart
Procedure:
ADJUST MENU screen
MANUAL ADJUSTMENT PROGRAM for SERVICE STATION
××××
MODEL NAME:
ADJUST MENU
DATA INITIALIZE
VIDEO LEVEL
BURST LEVEL
AUTO FUCUS
AUTO IRIS CONTROL
SAMPLING PULSE
MATRIX
CHROMA GAIN
SPOT NOISE
LCD
2
CONNECTION
1) Choose AUTO FOCUS.
2) Click the EXECUTE button to start
adjustment.
ADJUSTMENT FINISHED dialog
FINISHED
ADJUSTMENT FINISHED.
OK
3) Click the OK button in dialog to restore the
ADJUST MENU screen.
AF ADJUSTMENT ERROR dialog
ERROR
Lens Adjustment Error
OK
If the AF ADJUSTMENT ERROR dialog
appears, click the OK button in dialog,
perform the following troubleshooting, and
then execute readjustment:
a) Increase the illumination.
b) Set the distance between the backfocus
chart and lens surface precisely to
1500mm ± 5 mm.
If the AF adjustment error dialog still
appears even after troubleshooting, the
connection of lens unit may be incorrect or
the unit may be faulty.
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EXECUTE RETURN
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