Sony Handycam CCD-TRV21E User manual

Video8
B MECHANISM
OPERATION MANUAL
A18
mMECHANISMDECK

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.
4-3.
4-4.
4-5.
4-6.
4-7.
4-8.
4-9.
STOP _ PB ............................................................................................ 23
STOP =:=:===_ REC ......................................................................................... 27
STOP ====:==_ FF ............................................................................................ 31
STOP =====_ REWIND ................................................................................ 35
PB ===:==_ CUE .............................................................................................. 38
PB ==:===_ REVIEW ...................................................................................... 40
PB _ PAUSE ......................................................................................... 42
STOP ===:=:=_ EJECT .................................................................................... 45

1. Main parts layout diagram
REC proof switch (S001)
Sensor
Cassette down switch
(S002) T reel
LED
S reel
Capstan motor
(M902)
Pinch roller
Drum (M901)
Loading motor
(M903)
Sensor S
Gooseneck gear
Rotary encoder
(S901)
Fig. 1-1

2. Operation of main parts
Tension regulator plate 1
moves in the direction of
arrow.
Loading motor (M903) rotates. ]
[ Worm shaft and gear A rotates. [
[ Rotary encoder rotates. [
[ Cam gear rotates. [
M slider slides in the direction of [
arrow.
Pinch press plate moves in the ]
direction of arrow.
f
I L arm moves in the [
direction of arrow.
direction of arrow.
Worm Loading motor
Gear
Rotary encoder
Tension regulator
plate 1
GL slider
Pinch press plate
GL arm
Cam gear
LS arm
Fig. 2-1
M slider

3. Operation of each part
3-1. Driving of LS chassis
1
I
i
TG4 moves in the |
direction of arrow. J
LS arm moves.
r
LS chassis moves.
Cam gear rotates.
!
I M slider in ®moves
direction after first
slightly moving in O
direction.
Pinch press plate moves
inOdirection after first
slightly moving int_)
direction.
I
I
TG1 moves m the |
I
direction of arrow. 1
Claws on stoppers S and T
are released from locked
position and guide S (TG2)
and guide T (TG3) move in
the direction of arrow.
Pinch roller moves in theJ
direction of arrow.
GL arm moves in the
direction of arrow.
!
GL slider moves in the
direction of arrow.
I
I
Guide S (TG2) and guide
T (TG3) further move in
the direction of arrow.

GL arm
GL slider
@
•Pinch press plate
Cam gea=
LS arm M slider
Fig. 3-1
TG1
Guide T
(TG3)
Guide S
(TG2)
uide rail
Pinch roller
arm
Stopper T
Stopper S
IViewed from the rear. I
Fig. 3-2 LS chassis assembly

3-2. Driving of pinch roller
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
I

Pinch press plate
M slider
Fig. 3-3
Shaft of pinch roller "-Torsion spring (pinch)
press plate
Fig. 3-4

3-3. Driving of tension regulator and TG1
Rotary encoder rotates. [
|
TG1 moves in the direction of I
arrowf_)as LS chassis moves. I
TG1 shaft touches on!_)portion, I
then it moves in the direction of 1
arrow_.
I
!
TG1 further moves in the [
direction of arrow(fi). I
!
TG1 moves in(_)direction I
shortly after it moves int_) I
direction. !"
TG1 moves inl_)direction. I
Tension regulator plates 2 I
and 1 move in@direction, i
|
!
Rotary encoder further ]
rotates and tension [
regulator plates 2 and 1 [
move in(_)direction shortly I
after they move in(_ ]
direction. [
!
I Tension regulator plates 2 I
and 1 move inl_)direction.
I

Tension reg
plate 2
Rotary encoder
(S901)
Tension regulator
plate 1
O
slider
Fig. 3-5
TG1 _1_(_ TG1 moves in the direction of
arrow(_as LS chassis moves.
Tension regulator band
regulator
plate 2
®"-Tension regulator
plate 1
Fig. 3-6

3-4. Driving of S reel and S ratchet
I M slider moves in the direction of arrow [
I
as cam gear rotates. I
,L
1
S ratchet shaft touches M slider onl_
portion, then S ratchet moves in the
direction of arrowl_).
S ratchet release plate moves in the
direction of arrowt_).
* With this operation of S reel
the brake is released.

Fig. 3-7
S reel
S ratchet release plate
Tension spring
S ratchet (_)
S ratchet shaft _.
M slider
Tension spring
Fig. 3-8

3-5. Driving of T ratchet and T soft gear
T soft claw and T soft spring
move in the direction of arrow(_),
then, immediately returned.
M slider moves in the direction of [
arrow(_), in no time followed by ]
movement in the reverse direction. ]
!
M slider pushes T ratchet only)
portion and T ratchet moves in
the direction of arrow!_), then,
immediately returned.
I
T soft claw and T soft spring
move in the direction of arrow_).
M slider again moves in the direction of arrow_). [
!
T ratchet moves in the direction I
of arrow (_)to brake T reel. [
* Under this condition T reel is
locked, allowing no rotation.

T soft claw
T ratchet
slider
©
T soft g
T soft spring
Fig. 3-9
Tension spring
T reel
ratchet
T soft
"T soft spring
'T soft gear
M slider
Fig. 3-10

11 Operation in each mode
4-1. Cassette IN _ STOP Drum (M901) rotates. [
f
H
[ LS ann moves in the direction of arrow. [
II
LS chassis moves in the direction of I
I
arrow I_)in conjunction with the I
movement of LS arm boss.
,
Stoppers S and T on guide S (TG2) and I
guide T (TG3), respectively, are released, I
thereby GL slider movesin the direction I
of arrow, allowing guide S (TG2) and I
guide T (TG3) to move in the direction of I
arrow to be set in place. I
This operation the tape contacts
closely with drum (M901).L
I S ratchet moves in the
direction of arrow ®, then
returned.
TG1 is slightly returned inthe direction of arrow ®.
I Loading motor (M903) rotates. I
Rotary encoder and cam gear
rotate via gear A.
M slider moves firstly in ® direction, I
subsequently in i_)direction. I
f
TG1 and TG4 move in the direction of
arrow as LS chassis slides.
IPinch roller moves in the direction
of arrow _. !
M slider further moves in the direction I
of arrow !_),followed by the movement I
in ® direction. l
I Pinch roller moves in the direction of
arrow i_)to contact with capstan shaft.
IPinch roller rotates in the direction of I_
i
arrow (D, then in the reverse direction. I
f
I Loading motor (M903) rotates
reversely. I
Pinch roller moves in the direction I
opposite to arrow @, separating from I
capstan shaft.
iLoadingmotor(M903)stops.,, I
T ratchet moves in the direction of arrow f_), I
[braking T reel followed by immediate releasing.J
Capstan motor (M902) rotates. [
Change gear and relay gear rotate
through timing belt.
Gooseneck gear moves in the direction I
of arrow_) to gear into S reel. [
i
[ Capstan motor (M902)stops. J
T reel slightly rotates in thedirection of arrow.
r
Capstan motor (M902) rotates in the reverse _ S reel slightly rotates in I
direction and immediately returns to the -Ithe direction of arrow. I
normal rotation. I
Gooseneck gear moves in the direction L_.__T reel slightly rotates in [
i
of arrow q) to gear into T reel. [ _[the direction of arrow. I
l * This operation the
looseness in tape is
corrected.
[ Capstan motor (M902)stops. [Drum (M901) stops. [

®
Cassette compartment
* When cassette compartment is
depressed in the direction of arrow_,
claw on@portion in cassette
compartment touches EJ arm at
portion so that EJ arm moves in the
direction of arrowO. This operation islocked cassette compartment and
, turns ON cassette down switch
'_ (S002). When turned ON the cassette
Cassette down / down switch (S002), drum (M901) and
switch (S002) capstan motor (M902) start to rotate.
EJ arm
Fig. 4-1 Cassette compartment DOWN
Loading motor
(M903) Drum (M901)
HC roller GL slider
Capstan motor (M902)
Rotaryencoder
Tension reg
plate 1
Tension reg
plate 2
Cam
belt
Pinchpress
plate
LS arm Changegear
Mslider Relay gear
Fig. 4-2 Mechanism chassis assembly
Tension regulator
band
RVS arm
S ratchet release
plate
S
TG1
Guide S Guide T
_2) (TG',
LED
Pinch roller
TG4
switch (S002)
reel
r ratchet
proof
switch (S001)
S reel T soft claw T soft spring
Gooseneck gear T soft gear
Fig. 4-3 LS chassis assembly

4-2. STOP PB
Loading motor (M903) rotates. [
1
I otary encoder and cam gear I
rotate via gear A.
IDrum (M901) rotates. I
Tension regulator plates 1 and 2 [
move in the direction of arrow (_)[
in conjunction with the rotation I
of rotary encoder. [
,!
ITG1 moves in the direction ofarrow. I
*This operation corrects the
looseness in tape.
M slider slides in the direction
of arrow, allowing pinch press
plate to move in the direction
of arrow.
Pinch roller moves in the
direction of arrow to contact
with capstan shaft.
T ratchet and S ratchet move in
each direction of arrows as M
slider moves.
Brakes for T reel and S reel are |
/
released, allowing free rotation. l
l Capstan motor(M902) rotates inthe direction of arrow.
Pinch roller rotates in the
direction of arrow to start tape
running.
1
Change gear and relay gear
respectively rotate via timing
belt.
Gooseneck gear rotates in the
direction of arrow, allowing the
rotation of T reel.
* This operation winds tape
around T reel.

Loading motor Capstan motor (M902)
(M903) Drum (M901)
HC roller GL slider
Gear
Rotary encoder ©Pinch press plate
M
TG1
Guide S (TG2)
Tension regulator
band
S ratchet release
plate
S ratchet S reel /@z_ T soft spring Gooseneck
gear
LS arm boss T soft claw
T(TG3)
Pinch roller
reel
ratchet
Tsoft gear
Loading motor (M903)
Guide S (TG2)
TG1
/
Tension regulator
band
S ratchet---------
/
S ratchet release
plate
Drum (M901)
iX HCroller /GLslider
S reel Gooseneck gear
Capstan motor (M902)
/
/TG4
T ratchet
Fig. 4-4 Mechanism chassis and LS chassis assembly