Sony B Mechanizm Operation Manual

Video8

BMECHANISM

OPERATION MANUAL

l_!MECHANISMDECK

CONTENTS

1. Main parts layout diagram ....................................................................... 4

2. Operation of main parts ............................................................................ 5

3. Operation of each part .............................................................................. 6

3-1. Driving of LS chassis ......................................................................................... 6

3-2. Driving of pinch roller ....................................................................................... 8

3-3. Driving of tension regulator and TG1 ............................................................ 10

3-4. Driving of S reel and S ratchet ....................................................................... 12

3-5. Driving of T ratchet and T soft gear .............................................................. 14

4. Operation in each mode ........................................................................... 17

4-1. Cassette IN _ STOP ............................................................................. 17

4-2. STOP _ PB ............................................................................................ 23

4-3. STOP _ REC ......................................................................................... 27

4-4. STOP _ FF ............................................................................................ 31

4-5. STOP =:===:_ REWIND ................................................................................ 35

4-6. PB =====_ CUE ............................... ............................................................... 38

4-7. PB _ REVIEW. ........................................ _............................................ 40

4-8. PB _ PAUSE ......................................................................................... 42

4-9. STOP _ EJECT .................................................................................... 45

-3-

1. Main parts layout diagram

REC proof switch (S001)

Sensor

Cassette down switch

(soo2)

T reel

LED

S reel

Capstan moto

(M902)

Pinch roller

Drum (M901)

Sensor S

gear

Loading motor

(M903)

Rotary encoder
(sg01)

Fig. 1-1

-4-

2. Operation of main parts

f

Tension regulator plate 1
moves in the direction of

arrow.

I Loading motor (M903) rotates. I

IWorm_ha_and,o__ro_os.I

] Rotary encoder rotates. I

M slider slides in the direction of I

arrow °

I

I Pinch press plate moves:in the I'

direction of arrow.

f

I GL arm moves in the

direction of arrow.

I GL slider moves in the

direction of arrow.

I

!

Loading motor
(M903)

Rotary encoder

Tension regulator
plate .1 _

GL slider

Pinch press plate

GL arm

Cam gear

LS arm

Fig. 2-1

M slider

-5-

3. Operation of each part

3-1. Driving of LS chassis

[

LS arm moves.

1

LS chassis moves. J

I

Cam gear rotates.

1

M slider moves in _)

direction after first
slightly moving in (_

direction.

Pinch press plate moves

in_)direction after first
slightly moving in(_)
direction.

I

I TG4 moves in the ]

direction of arrow.

!

TG 1 moves in the -I

direction of arrow. ]

i

V

Claws on stoppers S and T

arereleased from locked
position and guide S 0°02)

and guide T 00G3) move in
the direction of arrow. r

Pinch roller moves in the [

direction of arrow.

4

r

GL ann moves in the [

direction of arrow.

I

GL slider moves in the
direction of arrow.

I

I

Guide S (TG2) and guide
T (TG3) further move in
the direction of arrow.

-6-

GL slider _)

GL arm__ _oo_._ _ @r_,_

" ___ "" Pinch press plate

Cam gear_-iS _ __

Fig. 3-1

TG1

Guide T
(TG3)

Guide S
(TG2)

_(_uide rail

Pinchroller

arm

Stopper T

iViewed from the rear. I

Fig. 3-2 LS chassis assembly

-'7-

3-2. Driving of pinch roller

I
I

M slider moves in the
direction of arrow.

Pinch press plate moves in
the direction of arrow

Shaft of pinch roller arm is
pushed with pinch press
plate at(_portion.

Pinch roller moves in the

direction of arrow to be

pressed with capstan shaft.

I

-8-

press plate

M slider

Fig. 3-3

Pinch roller_...._

Shaft of pinch

-Torsion spring(pinch)

_ Pinch press plate

3-3. Driving of tension regulator and TG1

Rotary encoder rotates. [

1

I TG1 moves in the direction of J

|

arrow(_as LS chassis moves.

I

1

TG1 shaft touches on(_laortion. [
then it moves in the direction of I
arrow_. ]

9

!

TG1 further moves in the

dire_on of arrow_.

4

p

i

TG1 moves in(_)direction
shortly after it moves in_)

direction.

I"

TG1 moves in(_iirection.

1

!

Tension regulator plates 2

I

and 1 move in_:lirection, n

|

!

Rotary enc_ler further
rotates and tension

regulator plates 2 and 1
move inOdirection shortly
after they move ini_)
dim_ion.

p

Tension regulator plates 2

and 1 move in, direction.

I

- 10-

Tension regulator
plate 2

Tension regulator/
plate 1

_'- _ _Rotaryencoder

(S901)

der

Fig. 3-5

® ®

TG1

TG1 moves inthe direction of
arrow(_as LS chassis moves.

Tension regulator band

regulator

plate 2

"Tensionregulator

plate I

3-4. Driving of S reel and S ratchet

M slider moves in the direction of arrow I

i

as cam gear rotates.

I

S ratchet shaft touches M slider on®
portion, then S ratchet moves in the
direction of arrow(_).

S ratchetreleaseplatemoves inthe
directionof arrow_.

I

* With this operation of S reel

the brake is released.

- 12-

S!

S ratchet shaft

©

LSarm

S me|

S ratchetretease plate

S

S ratchet

-i'enslonspring

M slider

3-5. Driving of T ratchet and T soft gear

M slider moves in the direction of
arrowl_ in no time followed by

movement in thereverse direction.

+

T soft claw and T soft spring
move in the direction of arrowO,
then, immediately returned.

!

1

M slider pushes T ratchet on®
portion and T ratchet moves in
the direction of arrow_, then,
immediately returned.

1

I M slider again moves in the direction of arrow@, i

IT soft claw and T soft spring " T ratchet moves in the direction i

move in the direction of arrow_). [ [ of arrow (_)to brake T reel. I

* Under this condition T reel is

locked, allowing no rotation.

- 14-

T soft claw

©

T soft gear

T soft spring

Fig. 3-9

T ratchet

slider

Tension spring

T reel

Tsoft

soft spring

softgear

M slider