Spot Noise - Hitachi DZ-MV230A Service Manual

9.

Spot Noise

Spot noise refers to bright points that appear on the screen: They are caused by
a defect in pixel of CCD image sensor.
Caution:
Perform this adjustment with normal video signal, after completing
all other adjustments.
Perform this adjustment after specified components have been
replaced (see "4. List of Adjustment Items").
Perform this adjustment if spot noise occurs during abnormal usage
conditions or after long-term use.
If spot noise still occurs after this adjustment is complete, the CCD
image sensor may be defective.
Refer to "3. Starting Adjustment Program (MAP)" in advance, start MAP and
display the main menu on PC display. If an error message appears on PC
display during adjustment, perform troubleshooting, referring to "10. Error
Messages".
Phenomenon due to incomplete adjustment:
Spot noise occurs during abnormal usage conditions or after long-term use.
Test equipment/jig:
Color video monitor (CRT monitor is desirable when checking spot noise)
Adjustment status:
Lens capped (when checking spot noise)
Procedure:
1) Input E to PC on the main menu screen.
2) The screen for verifying start of adjustment will appear: Input Y to PC.
(*1)
3) The screen showing that the spot noise is being adjusted will appear:
Wait for approx. 30 seconds. (Restart will occur automatically several
times during this adjustment.) (*2)
4) When the adjustment is complete, the adjustment complete screen will
appear: Press any key on PC to restore the main menu screen on PC
display. (Restart Will automatically be executed before the main menu
screen is restored.)
*1: Entering N on the screen for verifying start of adjustment will restore the
main menu screen.
*2: Take care during adjustment that no fault occurs in connections or power
supplies of DVD video camera/recorder, PC, jig and test equipment
(faulty connection, unexpected power shutoff, etc.). If fault does occurr
(faulty connection, unexpected power shutoff, etc.), perform "5. Data
Initialize", followed by any other adjustments.
Main menu screen
***********************************************************
MANUAL ADJUSTMENT PROGRAM
***********************************************************
[A] DATA INITIALIZE
[B] CAMERA ADJUSTMENT
[C] AUTO FOCUS
[D] STABILIZER
[E] SPOT NOISE
[ESC] END
Please select [A] - [E] or [ESC]
Input E to PC
Screen for verifying start of adjustment
***********************************************************
SPOT NOISE ADJUSTMENT PROGRAM
***********************************************************
NOW GOING TO SPOT NOISE ADJUSTMENT PROGRAM
ARE YOU SURE ? (Y/N)
Please select [Y] - [N] or [ESC]
Input Y to PC
Screen for spot noise being adjusted
***********************************************************
SPOT NOISE ADJUSTMENT PROGRAM
***********************************************************
NOW ADJUSTING
PLEASE WAIT AROUND 30 SECONDS
Adjustment complete screen
***********************************************************
SPOT NOISE ADJUSTMENT PROGRAM
***********************************************************
SUCCESS
ADJUSTMENT COMPLETED
[PRESS ANY KEY]
Press any key on PC to restore the main
menu screen.
3 - 23