Mamiya DSX - Page 32

E.
Repairing
immovable
meter
needle
A.
Immovable
meter
needle
for
both
Spot
and
Average
1.
Remove
the
soldered
wires
on
Meter
drum
and
check
whether
the
meter
needle
deflects
with
a
circuit
tester.
2.
Replace
Meter
drum when
the
meter
needle
dees
not
deflect.
3.
When
the
meter
needle
deflects,
the
wires
are
disconnected
or
short-
circuited.
B.
Immovable
meter
needle
for
either
Spot or Average
1.
Remove
the
soldered
wires
for
defective
CdS
and
check
the
conduction
with
a
circuit
tester.
2.
Replace
CdS
when
there
is
no
conduction.
(Refer
to
items
of
Replacing
CdS
for
Spot
and
Average.)
3.
When
there
is
the
conduction,the
leads
or
wirings
on
Printed
circuit
are
disconnected
or
short-circuited.
Note:
When
3PB1.7x3Ni3
Setscrew
is
loose,
the
meter
needle
deflects
to
high
luminance.
So
tighten
Setscrew.
F.
Replacing
Meter
drum
1.
Unsolder
the
wires
connected
with
Meter
drum
on
Printed
circuit
with
resistor.
2.
Remove
3PB1.7x3Ni3
Screw
as
CdS
for
Average
is
attached.
3.
Remove
OTL2943
Spring
from
Chainlet
and
Chainlet
from
Meter
drum.
5
Remove
Screw
OTL2967
Screw
PB1.7x2
Screw
@)
and
TL2955
Screw
@)
Then
pull
out
Meter
drum
cautiously
to
the
direction
of
the
side
so
as
not
to
damage
the
meter
needle.
5.
When
assembling
Meter
drum,
proceed
it in the reverse order outlined
above.