Hall Adjustment - Sony CCD-TRV32 Service Manual

7. HALL adjustment

Purpose : Variation of the HALL element outputs is
removed by adjusting amplifier gain and offset.
The HALL elements detect the lens iris
position.
Adjustment error : Oscillation of lens iris, or incorrect white
balance indoor and outdoor.
Subject Not required
Measurement Point DDS display on the EVF or monitor
Measuring Instrument TV
Adjustment Page F
Adjustment Address 40
41
Specification 13h to 17h when iris is opened.
79h to 7Dh when iris is closed.
Adjustment procedure:
Order Page Address
1 6 00
2 F 02
3
4 6 00
5 6 02
6 6 01
7 F 40
8 F 40
9 6 01
10 F 40
11 F 40
12
13
14
15 F 40
16
17 F 41
18
19 6 01
20
Note : Lower two digits of the data which is displayed at the right
bottom of he EVF or TV monitor
Data
01 After setting the data, press the PAUSE button. (Preparation)
21 After setting the data, press the PAUSE button.
Turn off the UNREG power supply once, then turn it on.
01 After setting the data, press the PAUSE button.
03 After setting the data, press the PAUSE button.
03 After setting the data, press the PAUSE button.
40 After setting the data, press the PAUSE button. Read the data appearing on the DDS
display note. The read-out data is W
30 After setting the data, press the PAUSE button. Read the data appearing on the DDS
display note. The read-out data is W
01 After setting the data, press the PAUSE button.
30 After setting the data, press the PAUSE button. Read the data appearing on the DDS
display note. The read-out data is K
40 After setting the data, press the PAUSE button. Read the data appearing on the DDS
display note. The read-out data is K
Convert the data W
1
are W ', W ', K ' and K
1 2 1
decimal number〉 or "Hexadecimal-Decimal Conversion Table".) Calculate the following
equation (decimal number calculation) to obtain X
A' = W ' + K ' – W ' –K
2 1 1
B' = W ' –K ' ....................................... equation 2
1 1
' = 1600 + (48×A')–(16×B') .................... equation 3
X
1
A'
Convert the decimal number X
number X to count fractions of 0.5 and over as a unit and cut away the rest.)
1
Set the data X (obtained at step 14).
1
Press the PAUSE button.
Change the data using the PLAY and STOP until 15h appears on the DDS display.
Press the PAUSE button.
03 After setting the data, press the PAUSE button.
If the DDS display shows the data in the range from 79h to 7Dh, it indicates the end of
adjustment, and proceed to the item "Processing after Adjustments". If it is not, use the
DDS display data as W
Procedure
.
2
.
1
.
1
.
2
, W , K and K into the decimal numbers. The result decimal numbers
2 1 2
'. (Use page 6-13 〈How to convert the hexadecimal number to
2
' ............................ equation 1
2
' to the hexadecimal number to obtain X
1
and proceed to step 21 and followings.
0
6-14
'.
1
. (Round the
1