List Of Adjustment Items; List Of Adjustments Needed After Replacing Major - Hitachi VK-U174 Service Manual

Adjustment > List of Adjustment Items

6-2 List of Adjustment Items

6-2-1 List of adjustments needed after replacing major

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
White Balance
Chroma Gain
Auto Focus
Zoom/Focus Tracking
AF Noise Level
Check of Zoom/Focus
Trace
Spot Noise
Spot Noise
*1: When replacing the 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.
Table 6-2-1
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 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.
6 - 5
Electrical Parts
IC2303
IC2304
IC1001 IC2001 IC2507
(*1)
Other
IC4101
IC4102
Lens
IC4103