Yashica Fx-3 Operating instructions

\^SHICA

FX-7

YASHICA

CO.,

LTD..TOKYO

Printed

in

Japan

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UOTE

:

(Parts

with

marked

"-Jt"

ere

not

Available)

NOTE

:

(Parts

with

marked

are

not

Available)

PARTS

NO.

_

DESCRIPT

IOtl

6617202U

E.

Rine

Removal

of

Top

and

Base

Covers

Removal

of

Base

Cover

Cautions:

There

are

possibilities

that

the

sprocket

lower

R

button

may

be

undone

because

the

adhesives

applied

to

it

lose

resistance

to

separation,

so

that

be

sure

not

to

miss

it.

Removal

of

Top

Cover

1.

Peel

off

the

W

lever

leather

(147660).

2.

Remove

the

W

lever

SS

(66001037),

and

take

off

the

W

lever

(147651)

and

the

lever

mount

(147652).

Cautions:

The

W

lever

SS

is

of

the

left-handed

screw.

3.

Remove

the

top

cover

nut

(147659).

Begin

removal

of

the

shutter

dial.

Set

the

shutter

dial

at

1/TOOO,

and

ASA

at

100,

then

start

the

following

work.

4.

Remove

the

name

plate

SS

(133298).

The

disassembling

procedure

is

as

illustrated

in

the

right

figure.

Name

plate

SS

(133298)

ASA100

shutter

1/1000

Shutter

dial

nameplate

(147415

ASA

name

plate

(133295)

ASA

spring

(147416)

Sdial

(147418)

ASA

color

(147409)

1

5.

Remove

the

rewind

knob

ass'y

(066920).

Cautions:

Use

the

root

of

the

tweezers

but

not

the

screw

driver

for

removing

the

rewind

shaft

fork.

6.

Take

off

the

top

cover

nut

(on

the

rewind

side)

(147659);

as

a

result,

the

rewind

shaft

cover

(147681)

will

be

removed.

7.

Remove

two

pieces

of

top

cover

SS'

(61915529)

(2)

and

(61903020)

(1),

respectively;

four

pieces

in

total.

8.

Gently

separate

the

top

cover

ass'y

(066920)

from

the

body.

Face

the

surface

of

the

mount

base

upward,

hold

the

top

cover

by

the

right-hand

,

and

remove

it

by

lightly

rolling.

9.

Disconnect

the

soldered

synchro

lead

wires

(black

and

light

brown)

inside

the

top

cover.

Removal

of

Front

Leather

1.

Peel

off

the

self-lever

leather

(147834).

2.

Remove

the

self

lever

SS

(66001027)

and

(132823).

3.

Peel

off

the

front

leather,

right

(147115)

and

the

front

leather,

left

(147116).

Removal

of

Shutter

Base

Plate

1.

Remove

2

shutter

base

plates

SS

(61914022)

and

a

lock

lever

shaft

(147816).

Z

Remove

the

solder

of

the

lead

wires,

yellow,

violet

and

gray.

3.

Remove

the

shutter

base

plate

(066445).

4.

The

shutter

shaft

is

removed.

(147422)

The

shutter

shaft

spring

is

removed.

(147423)

Shutter

speed

set

at

1

/1000

2

Removal

of

AMP

Ass'y

1.

Remove

the

solder

of

each

lead

wire.

2.

Remove

2

AMP

substrates

SS

(61912524).

3.

Remove

the

solder

of

5

legs

of

LED.

Removal

of

Mirror

Box

Ass'y

Yellow-—10

Orange

(Yellow)

Red

Brown

(Green)

Purple

Gray

1

.

Remove4

body

mount

SS

(131177)

and

body

mount

(147821).

Cautions:

(1)

The

standard

position

when

assembling:

At

the

back

cover

of

the

mount

ring,

the

insulating

collar

(132489)

is

made

to

agree

with

the

red

mark

put

on

the

mount

cover.

(2)

I

n

some

cases,

the

adjusting

washer

is

inserted

in

the

lower

side

of

the

mount

ring,

so

that

care

should

be

used

not

to

lose

the

washer.

2.

Remove

4

mount

covers

SS

(63913024)

and

a

mount

cover

(147801).

3.

Remove

3

mirror

boxes

SS

(61927024)

and

2

strap

holder

SS

(132143).

4.

While

lifting

AMP,

pull

out

the

mirror

box

ass'y

forward

and

remove

it.

Removal

of

Counter

Frame

1.

Remove

counter

reverse

lever

spring

(147870)

engaging

with

the

counter

gear

(1)

(139887).

2.

Remove

3

counter

base

plate

SS

(61913024)

and

take

it

out

upward

to

remove.

Removal

of

Shutter

Ass'y

1.

Remove

3

shutter

attachment

screws

(61924022).

(One

of

the

screws

is

tightened

through

the

back

cover.)

Z

Pull

out

the

shutter

ass'y

(147201).

Sector

Setting

(1)

Turn

the

setting

lever

clockwise

by

use

of

the

set

pin.

(Due

to

the

operation

of

the

winding

lever,

S

set-pin

on

the

body

side

pulls

the

set

pin.)

(2)

Turn

the

sector

setting

lever

counterclockwise

by

use

of

the

upper

of

the

setting

lever.

(3)

The

sector

setting

lever

is

caught

by

the

pins

of

both

front

and

rear

sector

drive

arms

and

turns

them

clockwise.

When

both

drive

arms

turn,

the

sector

descends.

(4)

When

both

drive

arms

are

full

set,

the

front

and

rear

sector

stop

levers

plunge

into

the

drive

arms

so

that

the

latter'

return

is

stopped.

With

the

above

operations,

the

setting

of

the

sector

ends.

3

Faults

that

may

occur

The

stop

levers

do

not

plunge

into

the

arms.

Setting

failure;

(Due

to

short

setting,

or

moving

failure

of

the

stop

levers.)

In

this

event,

viewing

from

the

film

side,

the

rear

sector

returns

(ascends)

when

the

winding

lever

returns.

Setting

of

Drive

Cam

(1)

When

the

setting

lever

is

set

(rotated

clock¬

wise),

the

pushes

the

setting

gear;

as

a

result,

tfie

latter

is

turned

clockwise.

(2)

The

setting

gear

rotates

the

gear

on

the

lower

side

of

the

drive

cam

with

which

the

setting

gear

engages,

and

then,

the

drive

cam

counter¬

clockwise.

(3)

When

the

gear

is

full

rotated,

the

release

lever

plunges

in

the

drive

cam,

and

then

it

stops.

Operation

of

Shutter

(1)

The

release

lever

is

pushed

down

by

MCL-7

of

the

mirror

box,

and

the

hook

is

separated

from

the

drive

cam.

(2)

The

drive

cam

rotates

clockwise

due

to

the

restoring

force

of

the

drive

spring,

and

the

is

pushed

out

to

the

outside.

(3)

Rotate

clockwise

the

front

curtain

stop

lever

through

3

parts

from

the

to

the

front

curtain

stop

lever

to

release

the

front

sector

drive

arm;

thus,

the

front

curtain

is

opened.

(4)

When;

the

drive

cam

hits

against

the

coupling

plate,

the

governor

works

and

the

coupling

plate

is

released.

(5)

The

dri\/e

cam

is

separated

from

the

coupling

plate,

the

setting

lever

turns

counterclockwise

and

swings

the

rear

curtain

stop

lever

clock¬

wise,

releasing

the

rear

sector

drive

arm.

(6)

The.

rear

curtain

advances

and

the

shutter

closes.

'

Drive

cam

4

Operation

of

Bulb

(1)

When

the

speed

change

gear

is

set

at

B,

the

convex

of

B

lever

is

set

to

the

concave

of

B

cam

below

the

gear.

(2)

When

depressing

the

release

button,

B

lever

descends

and

is

set

to

the

concave

of

B

cam

as

in

the

case

of

(1);

the

lever

descends

lower

than

other

shutter

speeds.

The

low

speed

governor

gear

is

locked

at

the

upper

side

of

B

lever.

(3)

The

mirror

box

works,

the

shutter

is

released,

the

drive

cam

rotates,

and

it

stops

when

hitting

against

the

coupling

plate.

(The

front

sector

advances

before

the

hit

against

the

coupling

plate.)

However,

as

the

low

speed

governor

is

locked

by

B

lever,

the

operation

stops

here.

(4)

When

lifting

(freeing)

the

release,

B

lever

ascends,

the

low

speed

governor

is

unlocked,

freed

and

comes

to

rotate,

then

the

coupling

plate

gradually

gets

away.

*

Other

operations

are

the

same

as

the

ordinary

ones.

Faults

that

may

occur

The

shutter

fails

to

close.

Because

of

the

flatness

of

B

lever

being

dis-

Bulb

skipping

satisfactory,

it

does

not

return.

(Change

the

release-position

by

SR

lever

(3)

below

the

body.

Change

the

bending

angle

of

the

hook

of

B

lever.)

Operation

of

setting

(1)

When

lowering

the

of

the

sector

gear

to

which

the

timer

spring

is

applied,

the

release

lever

B

plunges

into

the

drive

cam.

(2)

The

timer

stop

lever

rotates

clockwise,

and

locks

the

governor

gear.

Operation

of

release

(1)

When

pushing

down

the

release

lever,

it

is

separated

from

the

drive

cam.

However,

because

the

release

lever

B

being

hooked,

the

drive

cam

does

not

rotate.

(2)

Further

push

the

release

lever,

and

the

timer

stop

lever

turns

counterclockwise,

so

that

the

governor

gear

being

freed,

it

rotates.

The

sector

gear

returns

clockwise,

too.

(3)

Push

down

the

release

lever

B

immediately

before

the

ending

of

return

of

the

sector

gear,

and

the

drive

cam

is

freed

and

rotates.

Release

lever

B

Timer

stop

lever

5

Sector

gear

Adjustment

of

Shutter

Adjustment

of

shutter

speed

The

drive

spring

engages

with

the

drive

spring

base;

yet

its

position

is

to

be

moved.

However,

the

shutter

speeds

change

in

the

same

tendency

from

high

speed

down

to

low

speed.

For

example,

sucit

defects

as

a

second

being

over

and

1/125

sec

being

under

cannot

be

repaired.

Adjustment

of

curtain

travel

The

tension

of

the

drive

spring

is

changed

by

turning

the

ratchet

cylinder

(by

use

of

a

minus

(—)

screw

driver).

This

repair

is

possible

only

in

the

case

of

the

shutter

single,

where

it

is

impossible

to

measure

shutter

speeds,

so

that

the

repair

must

be

carried

out

depending

on

intui¬

tion.

*

When

adjusting

the

curtain

travel,

be

sure

to

confirm

shutter

speeds.

Adjustment

of

curtain

travel

Operation

of

Shutter

Phenomenon

When

setting

the

shutter

at

1/1000

and

pressing

the

shutter

button,

the

upper

half

darkens

and

the

shutter

speed

becomes

fast.

The

front

curtain

travel

is

slow.

Cause

The

shutter

moquette

(147206)

enters

the

inside

of

the

shutter,

and

contacts

with

the

front

curtain

when

the

latter

works.

Although

the

cause

varies

with

individual

shutters,

troubles

occur

in

case

the

end

of

the

front

curtain

projects

0.1

to

0.2

from

the

frame

supporting

the

sector

at

front

and

back.

Reparing

tequnicues

and

method

of

confirmation

•

When

sticking

the

moquette

between

the

body

and

the

shutter,

stick

it

lightly

lest

it

should

be

pushed

in.

It

should

be

sticked

such

that

it

is

placed

as

close

to

the

body

side

as

possible

and

the

top

of

the

shutter

side

of

mold

plane

becomes

low.

•

Reparing

method

of

complete

products

Remove

the

base

cover

and

2

pieces

of

cell

case

SS,

pull

out

the

cell

cases,

raise

the

mold

plane

in

such

manner

as

peel

it

off

with

tweezers,

anJ

again

stick

the

moquette

while

lightly

holding

the

mold

plane

on

the

body

side.

As

leaving

it

as

it

is,

check

the

shutter

speed

and

then

carry

out

the

assembly.

Shutter

6

Composition

of

Circuits

The

circuit

composition

consists

of

4

components

as

shown

in

the

left

figure.

(1)

Information

(2)

Adjustment

(Quantity

of

light)

(3)

Output

(4)

1C

(Control)

Calculate

and

adjust

information

by

1C;

by

using

the

result

of

which

as

output,

LED

is

driven.

EC

switch

information

[light-SPD

~j

jpilm

speed

setting

—

I

j

ASA

variable

resistor

j

Aperture

setting

—

Aperturej

!

Variable

Resistor

(AVR)/''

•

✓

/

T-"

,

1C

Input

Output

1

LED

I

1

_

OVER

I

under]

Adjustment

j"

Semi-fixed

"j

I

resistor

[

■

L

_J

Role

of

Each

Circuit

(1/2)

_

A1:

Logarithmic-compress

the

photoelectric

current,

calculate

it

with

V^sA-

^he

result

of

which

is,

as

V2,

sent

to

A2.

Vreg:.

A

constant

voltage

of

1.25±0.15V

is

generated

independent

of

variation

of

a

voltage

(Vcc)

from

the

battery.

Ra2:

Adjust

the

voltage

per

EV

of

Rp

and

Rasa-

The

adjustment

should

be

made

to

hold

as

follows.

Vreg-VI

=226mV

A2:

Calculate

V2,

the

output

of

A1,

Vp,

the

input

of

apperture,

and

Vadj,

the

input

of

light

adjustment,

the

result

(V3)

of

which

is

sent

to

A/D

.

V3

indicates

a

change

of

approximately

30mV

per

EV.

Co:

Amplifier

for

the

battery

checker;

when

Vcc

becomes

lower

than

24V,

a

signal

is

sent

to

A/D

to

turn

off

the

current

of

LED

with

the

result

that

the

LED

is

not

lit.

A/D:

A

circuit

to

determine,

depending

on

the

voltage

of

V3

sent

from

A2,

whether

OVER,

APPRO¬

PRIATE

or

UNDER

of

LED

should

be

lit.

This

is

generally

called

A/D

conversion.

8

c

[

c

[

Ojseration

of

Counter

Phenomenon

The

film

counter

does

not

advance

when

making

the

winding

lever

operate,

and

the

latter

half

of

the

film

counter

slips.

(It

will

advance

while

pressing

the

back

cover.)

Cause

Although

the

counter

G-1

engages

the

counter

gear,

yet

the

former

slips

and

does

not

advance

because

the

counter

release

SP

is

soft

that

pushes

the

counter

G-1.

(In

case

the

spring

is

deformed

during

installation.)

Counter

release

lever

Reparing

technique

and

confirming

method

•

Check

whether

the

counter

release

lever

fully

operates

toward

the

counter

G-1,

and

if

the

former

is

deformed,

repair

the

defect

to

strengthen

the

force

of

the

spring

to

push

the

counter

G-1.

'•

First

put

the

part

of

spring

to

press

the

counter

G-1

against

the

latter,

and

place

the

spring

in

the

catch

of

the

counter

release

lever

and

the

spring

in

the

counter

release

lever

shaft

Counter

making

a

little

free

the

wound

portion

at

the

central

part

of

the

spring,

then

apply

the

hook

on

the

opposite

side

to

the

film

counter

base.

Phenomenon

One

operation

of

the

winding

lever

makes

an

advance

of

film

by

2

frames,

or

an

unstable

advance.

Cause

If

there

are

burrs,

scratches,

etc.

in

the

portion

where

the

counter

contacts

the

counter

gear,

the

feed

failure

takes

place.

1.

When

soldering

the

lead

wire,

the

counter

G-1

was

deformed.

2.

The

corner

was

injured

by

the

screw

driver,

etc,

3.

There

is

a

burr

made

in

the

course

of

work.

4.

There

are

a

scratch,

chip,

etc.

in

the

counter

gear.

Repairing

technique

and

Confirming

method

The

failure

in

feed

of

the

film

counter

should

visually

be

found.

1

to

2.

Replacement

of

parts.

3.

Scrape

off

burrs.

(Not

partially,

but

totally

scrape

them

off.)

4.

When

adjusting

the

A-gear

stopper,

the

screw

driver

is

apt

to

scratch

it.

If

it

is

scratched,

replace

the

counter

gear.

9

Adjustment

Ra2:

The

volume

to

determine

the

amount

of

change

per

EV

of

aperture

and

ASA.

Making

the

voltage

of

Vreg

—

VI

agree

with

226±lmV.

R3:

This

is

to

change

the

lighting

width

of

LED.

Fixed

resistance

is

soldered

to

it,

being

selected

in

the

range

from

6kohms

to

lOkohms.

Standard

value:

(1)

+

and

green

(•)

are

lit,

Abt,

0.8

EV

(2)

Only

green

(•)

is

lit.

Ditto

(3)

Green

{•)

and—are

lit

Ditto

The

standard

resistance

is

8.2

kohms;

however,

when

it

is

intended

to

expand

each

lighting

width,

the

resistance

is

decreased,

and

when

it

is

intended

to

narrow

the

width,

the

resistance

is

increased.

However,

it

impossible

to

expand

or

narrow

•

(green)

only.

Ral:

This

is

semi-fixed

resistance

for

adjusting

the

amount

of

light.

With

a

flat

light

source,

and

setting

aperture,

ASA

and

shutter

speed

as

properly

selected,

adjustment

should

be

made

so

that

only

green

LED

(•)

is

lit.

Repairing

Method

1.

Not

lit

(LED)

No

current

flows

to

AMP

due

to

contact

failure

of

EC

switch

or

disconnection

of

white

lead

wire.

2.

OVER

is

left

lit

(1)

The

voltage

of

RF

is

high,

the

sam

as

Vreg

without

any

change.

(Because

of

wiring

or

R2,

Ra2

or

D

is

out

of

order.)

(2)

The

voltage

of

Rasa

is

high,

the

same

as

Vreg

without

any

change.

(Because

of

the

same

as

above.)

(3)

Vadj

is

low.

(The

leg

of

C4

shorts

to

the

body.)

3.

UNDER

is

left

lit

With

respect

to

the

phenomenon,

reverse

to

para.

2.

Short

circuits

of

RF,

Rasa,

Ral,

etc,

including

failure

in

SPD.

4.

One

or

2

of

3

LED's

go

on

and

off,

but

the

remainder

do

not

go

on.

(1)

Disconnection

of

soldered

legs

of

LED.

(2)

Disconnection

of

R5

through

R7.

(3)

Defective

LED.

Apply

R-range

of

tester

to

(+)

and

LED

(—)

sides,

and

check

whether

LED's

are

lit.

5.

The

lighting

width

is

broad.

Make

R3

greater,

(8.2

kohms

to

10

kohms)

6.

The

lighting

width

of

Green

(•)

is

narrow.

Make

R3

less,

(8.2

kohms

to

5.6

kohms)

7.

GREEN

is

not

lit.

UNDER

is

lit

directly

from

OVER

passing

over

GREEN.

1C

is

defective,

and

AMP

should

be

replaced.

Winding

Mechanism

•

The

A-S'M-set

lever

under

the

body

moves

to

the

spool

side

by

means

of

the

winding

lever

(147651),

and

sets

the

shutter

and

the

mirror

at

the

same

time,

•

Using

cocking

arm

fixer

Ass'y

(066616),

the

winding

can

be

made

away

from

.the

set

cam

fixer

(147610)

together

with

SR

lock

lever

(147439)

until

the

winding

is

made

halfway.

The

external

circum¬

ference

of

the

set

cam

clamp

is

used

in

the

middle

of

winding

so

that

the

shutter

release

shaft

is

con¬

structed

so

as

for

the

release

not

to

descent

in

the

course

of

winding

operation.

•

The

A-gear

stopper

pluges

in

the

A-gear

about

0,2mm

immediately

before

the

winding

stops,

and

then

the

check

pawl

is

released

from

the

set

cam

plate.

Adjusting

method

of

A-gear

stopper

Rotate

the

A-gear

stopper

shaft

(eccentric

screw)

(147618)

to

create

an

allowance

of

0.2mm.

Adjusting

method

of

check

pawl

Loosen

the

screw

(61814024)

and

make

the

check

anti-rewind

claw

collar

(147637)

(eccentric

colar)

rotate

for

adjustment

10

Winding

Operation

Phenomenon

When

gently

returning

the

winding

lever,

it

stops

midway,

and

cannot

return

to

the

full.

Cause

Perform

the

winding

until

the

winding

lever

engages

the

check

anti-rewind

claw,

where

the

operation

of

the

lever

should

be

checked.

In

case

the

lever

does

not

smoothly

move:

1.

The

winding

lever

edges

up

to

the

projection

due

to

an

inclination

of

the

top

cover.

2.

No

upward

and

downward

plays

are

found

on

the

Winding

feeding

plate

ass'y

and

the

wi¬

nding

lever

base.

3.

The

clogging

of

the

holes

of

the

counter

gear

base

and

the

winding

feeding

plate

ass'y.

Repairing

technique

and

confirming

method

1.

Install

the

top

cover

such

that

it

is

located

at

the

central

part

of

the

winding

lever.

2.

Regarding

paragraphs

2

and

3,

check

the

shaft

or

base

for

dimensions,

and

replace

one

of

them

which

is

not

acceptable.

Note:

Check

the

counter

for

advance,

return,

etc.

Faults

that

may

occur

The

winding

lever

fails

to

return.

Top

cover

nut

winding

feeding

plate

ass'y

Phenomenon

When

operating

the

winding

lever

all

the

way,

it

comes

to

be

out

of

order,

so

that

it

does

not

return

by

use

of

spring

tension.

Cause

Because

the

check

anti-rewind

claw

fails

to

free

from

the

set

cam

plate

when

operating

the

winding

lever

for

winding.

Repairing

technique

and

confirming

method

Remove

the

bottom

cover,

a

little

loosen

the

check

anti-rewind

claw

caller

SS,

make

the

ec¬

centric

check

anti-rewind

claw

caller

rotate,

and

tighten

the

check

anti-rewind

claw

caller

SS

while

fixing

the

slotting

part.

The

above

operation

should

be

repeated

until

a

perfect

o-

peration

is

obtained.

n

Yashica FX-3 Operating instructions

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