List Of Adjustment Items; Data Initilize - Hitachi VK-S274 Service Manual

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
Items
Data Initialize

Data Initilize (*2)

Electric Volume
CDS Sampling Pulse
Camera Adjustment (Adjustment)
Auto Iris
Matrix (*3)
White Balance (*3)
Chroma Gain (*3)
Auto Focus
Zoom/Focus Tracking
AF Noise Level
Check of Zoom Trace
Spot Noise
Spot Noise
*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: For the color video camera (TYPE S/SE).
3 - 4
Purpose Adjustment
Initilizing EEPROM.
To suppress noise in the CCD sensor
output signal and maximize the signal
level.
To set the iris control data.
To compensate for uneveness in the
chroma signal
To input the automatic white balance
control data.
To set the color satuation under the
reference color temperrature.
To set the out-of -focus correction level
during zooming.
To set the noise level in the autofocus
circuit.
To check the autofocus adjustment.
To correct spot noise.
Circuit Boards Electrical Parts
PC IC1001 IC1101 IC1201 IC1250
SP
(*1)
Other
IC1351 Lens Block
(*1)