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6-2-14. Iris IN/OUT Adjustment (VC-179 (A)/179 (B) board)
For the unit to judge if the white balance is indoors or outdoors in
auto white balance operations, measure the light level and write it
in the EEPROM.
If the level is not correct, the white balance will not be accurate.
Subject
White pattern
Measurement Point
Lower 2 digits of the date of the page
Measuring Instrument
A displayed
Adjustment Page
F
Adjustment Address
13, 14
Adjusting method:
1) Set data: 01 to page: 6, address: 00.
2) Set data: 0E to page: 6, address: 02.
3) Set data: 0B to page: 6, address: 01, and press the PAUSE but-
ton of the adjusting remote commander.
4) Read the page A display data (Note 1), and take the upper two
digits as D1 and the lower two as D2.
5) Convert D1 to a decimal number and obtain D1'. (Refer to Table.
6-5. "Hexadecimal Notation-Decimal Notation Conversion
Table".)
6) Calculate D3' using the following equations. (Equations 1 and
2 are for decimal notation calculation)
When D2
D0
D3'= D1' – 21 ....................................... Equation 1
When D2 < D0
D3'= D1' – 22 ....................................... Equation 2
7) Convert D3' to a hexadecimal number and obtain D3.
8) Set D3 to page: F, address: 13, and press the PAUSE button of
the adjusting remote commander.
9) Set data: 09 to page: 6, address: 01, and press the PAUSE button
of the adjusting remote commander.
(IND0.5 SHUTTER mode setting)
10)Read the page A display data (Note 1), and take the upper two
digits as D4 and the lower two as D5.
11)Convert D4 to decimal number and obtain D4'. (Refer to Table.
6-5. "Hexadecimal Notation-Decimal Notation Conversion
Table".)
12)Calculate D6' using the following equations. (Equations 3 and
4 are for decimal notation calculation)
When D5
F0
D6'= D4'– 13 ........................................ Equation 3
When D5 < F0
D6'= D4'– 14 ........................................ Equation 4
13)Convert D6' to a hexadecimal number and obtain D6.
14)Set D6 to page: F, address: 14, and press the PAUSE button of
the adjusting remote commander.
Note 1: The right four digits of the display data at the right bot-
tom side of the monitor TV is the LIGHT LEVEL data.
If the lower digits change severely and cannot be read,
record it on a tape once, play it back by frame feeding,
and obtain the average value.
Processing after Completing Adjustments
1) Set data: 00 to page: 6, address: 01, and press the PAUSE button
of the adjusting remote commander.
2) Set data: 00 to page: 6, address: 02.
6-2-15. Max Gain Adjustment (VC-179 (A)/179 (B) board)
Correct the differences in the minimum illuminance.
If the illuminance is not consistent, the image level required for
taking subjects in low illuminance will not be produced (dark).
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
1) Set data: 01 to page: 6, address: 00.
2) Set data: 04 to page: F, address: 2D.
3) Set data: 19 to page: 6, address: 01, and press the PAUSE button
of the adjusting remote commander.
4) Change the data of page: F, address: 15, and adjust so that the
signal level (A) becomes the specified value.
Note: The data of address: 15 should be 70 to FF.
5) Press the PAUSE button of the adjusting remote commander.
Processing after completing adjustments
1) Set data: 00 to page: 6, address: 01, and press the PAUSE button
of the adjusting remote commander.
2) Return the data page: F, address: 2D to an initialized value.
6-21
White pattern standard picture frame
VIDEO OUT terminal
Oscilloscope
F
15
PCS-C150
A=450mV
PCS-C150P
A=460mV
Center of the white level
Center of the
pedestal level
H
Fig. 6-13.
A
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