Minolta XE - Adjustment of AUTO Exposure; 1. Adjustment of Ri; 2. Adjustment of R2; 3. Adjustment of R3

Wi
Adjustment
of
AUTO
Exposure
BANZBincé,
TOMS,
AIAG
CdS front
C CdS common terminal
CdS High terminal H | L CdS Low terminal
re
Adjustment of constant
current 25yuA
-————R
Adjustment of diaphragm and
ASA constant current 8uA
3
Adjustment of meter pointer
t+———— Rt
Adjustment of high brightness
R; ——
Adjustment of AUTO SS
Rs
Adjustment of low brightness
Ri
CdS back E Rp
[1]
Adjustment
of
Ri
—Adjustment
of
constant
current
25
4A—
@
@Measuring 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)
: Screw-driver for brightness calibration
WAdjustment procedures:
1.
As
shown
in
the
figure
below,
connect
lead
wires
for
measuring
to
IC
terminals
“7”
and
“8”
of
the
printed
base
plate
A
(0432)
and
disconnect
the
soldering
at
the
terminal
“C”
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
& @ fet Cds “c"
081 standard
ome) OF & circuit tester
‘ !
Met
U Power source adapter CSI &
3.
Turn
Ri
and
make
adjustment
so
that
voltage
(mV)
of
IC
terminals
“7"
and
“8”
of
the
printed
base
plate
A
(0432)
may
be
of
the
value
shown
in
the
table
below.
Voltage
decreases
if
R;
is
turned
right
and
it
increases
if
R;
is
turned
left.
Ambient temperature | 10~20C | 20~30C | 30~40T
Voltage (mV) 375+ 1 | 388+ 1 | 398+ 1
C
Lead
wire
for
measuring
IC
“8
Digital
tester
(Range:
V)