Minolta XE - Adjustment of R2; 4. Confirmation of Rav; 5. Confirmation of Rsv

42
(2|
Adjustment
of
Ro
—Adjustment
of
diaphragm,
ASA
constant
current
BuA—
WMeasuring
instruments:
-
081
standard
circuit
tester
(Model
SC-1)
or
constant-voltage
DC
power
source
(Model
E-1
or
E-2)
:
Digital
tester
Type
2507
:
Power
source
adapter
(081-4204-79)
:
Standard
lens
(50mm
F
1.
4)
-
Screw-driver
for
brightness
calibration
WAdjustment
procedures:
1.
As
shown
in
the
figure
below,
connect
lead
wires
for
measuring
to
PV
SW
pattern
and
earth
pattern
of
the
printed
base
plate
A
(0432),
and
disconnect
the
soldering
at
“C”
terminal
of
CdS front.
2.
Set
the
measuring
instruments
as
shown
in
the
figure
below
and
set
the
power
source
voltage
at 3.0V.
Digital time counter POWER: OFF
o te
B-CH cds “C"
® le
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$3
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00 0006 Yellow gel
8 ia
Digital tester (Range: V)
081
standard circuit (com.
tester
Lead wire for measuring
Power source adapter Standard lens
Lead wire for measuring
3.
With
Pv
button
of
the
body
depressed
(Pv
SW:
ON),
measure
voltages
(mV)
for
lens
F
2.8
and
for
lens
F
16,-and
make
adjustment
by
means
of
Rz2
so
that
the
difference
will
be
of
the
value
shown
in
the
table
below.
Voltage
decreses
if
Rz
is
turned
right
and
it
increases
if
Re
is
turned
left.
Ambient
temperature 10~20
|
20~30
|
30~40°C
Voltage
difference
(mV)
|
87.0+
1
90.041
93.04
1
4. Confirmation of Rav
Turn
the
diaphragm
dial
and
make
sure
that
voltage
differences
per
1
Ev
measured
between
F
2.8
and
F
16
are
as
shown
in
the
table
below:
Ambient
temperature
10~20
|
20~30T
|
30~40T
Voltage
difference
(mV)
|
17.4+
3
|
18.0+3
|
18.6+3
5. Confirmation of Rsv
Turn
ASA
dial
and
make
sure
that
voltage
differences
per
1
Ev
measured
between
12
and
3200
are as shown in the table below:
| Ambient temperature | 10~20C | 20~30T | 30~40T
Voltage » difference (mV) | 17.4+3 | 18.0+3 | 18.6+3