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List Of Adjustment Items - Hitachi VK-S454 Service Manual

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3.

List of Adjustment Items

The following table shows the adjustment items, their purposes, and whether or not check is required after replacing major
components.
The components shown in the table below are the minimum to be checked after replacing major components: If several
components have been replaced - or depending on the cause of a defect - more components may need to be checked.
: CHECK
Item of Adjustment
Purpose of Adjustment
Data Initialize
(1) Data Initialize (*2)
Initilizing EEPROM.
Electric Volume
(1) CDS Sampling
To suppress noise in the CCD sensor
Pulse
output signal and maximize the signal
level.
Adjustment
(1) Auto Iris Control
To set the iris control data.
(2) White Balance
To input the automatic wihite balance
control data.
(3) Chroma Gain
To set the color saturation under the
reference color temperature.
Autofocus
(1) Zoom/Focus
To set the out-of -focus correction level
Tracking
during zooming.
(2) AF Noise Level
To set the noise level in the autofocus
circuit.
(3) Check of Zoom
To check the autofocus adjustment.
Trace
Spot Noise
(1) Spot Noise
To correct spot noise.
IR Control
(1) IR Control
To set the IR filter control data.
*1: When replacing the PC circuit board (containing EEPROM) or EEPROM, be sure to perform all adjustments
only after "Data Initialize".
*2: Since all adjustments must be performed any time "Data Initialize" is done, do not perform it indiscriminately.
3 - 4
Name of Major Components

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