Spot Noise - Hitachi DZ-HS303A Service Manual

Adjustment > Adjustment Procedure

6-4-10 Spot Noise

Information:
1) The SPOT NOISE adjustment compensates
for bright points that appear on the screen,
and these are caused by a defect in pixel
of CCD image sensor that may occur when
DVD video camera/recorder is used under
particular conditions or for a long time.
Therefore, execute SPOT NOISE only in the
following cases:
a) Pixel defect occurs in CCD image sensor
and a bright point appears on screen,
b) CCD image sensor is replaced.
c) "Initial Data Write" is executed
2) The presence or absence of a bright point
that appears on screen due to pixel defect on
CCD image sensor can easily be judged by
capping the lens. Use a CRT color monitor
for this check.
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
LINEARITY
MATRIX
CHROMA GAIN
SPOT NOISE
LCD
2
EXECUTE
CONNECTION
1) Choose SPOT NOISE.
2) Click the EXECUTE button to start
adjustment.
When SPOT NOISE starts, the DVD video
camera/recorder will automatically turn on
again.
1
RETURN
6 - 33
ADJUSTMENT FINISHED dialog
FINISHED
ADJUSTMENT FINISHED.
3
OK
3) Click the OK button in dialog to restore the
ADJUST MENU screen.
If bright point still appears after adjustment
is fi nished, the CCD image sensor may be
faulty.
STOP NOISE ERROR dialog
ERROR
Spot Noise Adjustment Error
OK
If the SPOT NOISE ERROR dialog appears,
press the "OK" button in the dialog to restore
the adjustment menu, and then perform the
following procedure. If the SPOT NOISE
ERROR dialog still appears after executing
this procedure, the CCD image sensor may
be faulty:
1) Refer to "6-2-5 Starting and Terminating
Adjustment Program" to terminate the
adjustment program.
2) Set the power switch on DVD video camera/
recorder to "OFF", unplug the DC power cord
from the DVD video camera/recorder, and
then leave the DVD video camera/recorder
without any operation a few hours, until the
temperature inside it goes down.
3) Reconnect the DC power cord to the DVD
video camera/recorder after it has been left
for a few hours, and then set the power
switch to "HDD" .
4) Refer to "(1) Setting the DVD video camera/
recorder" in "6-2-4 Setting for Adjustment",
and check the setting status.
5) Restart the adjustment program, and then
perform spot noise adjustment again.