Sony Mavica MVC-FD71, Руководство по обслуживанию, Страница: 51 / 79

5-12
3. HALL adjustment
This adjustment sets the amplifier gain and offset to detect the iris
position of the lens. If disordered, the iris will oscillate or the indoor-
outdoor white balance will be faulty.
Subject Any subject
Measurement point
DDS display on LCD screen
Measuring equipment
Adjustment page F
Adjustment address C7, C8
When data on page: 2, address: 01 is 01,
(Note 1)
Specification value
Displayed data is 12 to 16.
When data on page: 2, address: 01 is 03,
(Note 1)
Displayed data is 76 to 7A.
Note 1: The PAUSE button on the adjustment remote commander
must be pressed.
Adjustment procedure:
1)
Set data: 01 to page: 0, address: 01.
2) Set data: 03 to page: 0, address: 03.
3) Set data: 03 to page: 2, address: 01, and press the PAUSE button
on the adjustment remote commander.
4) Set data: 40 to page: F, address: C7, and press the PAUSE button
on the adjustment remote commander.
5) Read DDS displayed data (Note 2), and assume it as W
2
.
Note 2:
Lower 2 digits displayed at the lower right of LCD screen.
00 00 XX
n
W2
6) Set data: 30 to page: F, address: C7, and press the PAUSE button
on the adjustment remote commander.
7) Read DDS displayed data, and assume it as W
1
.
8) Set data: 01 to page: 2, address: 01, and press the PAUSE button
on the adjustment remote commander.
9) Set data: 30 to page: F, address: C7, and press the PAUSE button
on the adjustment remote commander.
10) Read DDS displayed data, and assume it as K
1
.
11) Set data: 40 to page: F, address: C7, and press the PAUSE button
on the adjustment remote commander.
12) Read DDS displayed data, and assume it as K
2
.
13) Convert W
1
, W
2
, K
1
, and K
2
into decimal numbers to get W
1
’,
W
2
’, K
1
’, and K
2
’ (see Table 5-1-1. Hexadecimal-Decimal
Conversion table).
14) Calculate X
1
’ with the formulas given below (calculate decimal
numbers).
A’=W
2
’+K
1
’-W
1
’-K
2
’ ............................................ Formula 1
B’=W
1
’-K
1
’ ............................................................ Formula 2
X
1
’=
1600+(48xA’)-(16xB’)
.................................. Formula 3
A’
15) Convert X
1
’ into hexadecimal number to get X
1
.
(Round off the decimal place.)
16) Set data: X
1
to page: F, address: C7, and press the PAUSE button
on the adjustment remote commander.
17) Set data: 01 to page: 2, address: 01, and press the PAUSE button
on the adjustment remote commander.
18) Change the data on page: F, address: C8, so that DDS displayed
data is “14”.
19) Press the PAUSE button on the adjustment remote commander.
20) Set data: 03 to page: 2, address: 01, and press the PAUSE button
on the adjustment remote commander.
1-3. CAMERA SYSTEM ADJUSTMENTS
1. Adjustment points when major parts have been
replaced
When the CCD imager or lens block is replaced, adjust the items
indicated by
® in the following table.
Note:
The above described table is applied to MVC-FD71 model.
2. Power supply voltage check (FC-66 board)
Subject Any subject
Measuring equipment Digital voltmeter
D3.2 V check
Measurement Point CN401
1
Pin
(CN401
!•
Pin: GND)
Specification Value 3.20 ± 0.1 Vdc
CAM15 V check
Measurement Point CN101
8
Pin
(CN101
4
Pin: GND)
Specification Value 15.00 ± 0.4 Vdc
CAM –5.5 V check
Measurement Point CN101
5
Pin
(CN101
4
Pin: GND)
Specification Value –5.5
+ 0.2
Vdc
Check procedure
1)
Check that all power supply voltages satisfy the specified value.
HALL adjustment
Flange back adjustment
Color reproduction
adjustment
Auto white balance
reference data input
Auto white balance
adjustment
When the CCD
imager is replaced
®
®
®
®
When the lens
block is replaced
®
®
®
®
®
– 0.3