Sony SLV-690HF - Video Cassette Recorder User manual

i:I
H MECHANISM
OPERATION MANUAL
S

Contents
1. Main parts layout diagram .......................................................................................... 3
2. Tape path .................................................................................................................... 4
3. Cassette IN --_ Loading --_ Stop ................................................................................. 5
4. Stop --_ Playback ...................................................................................................... 11
5. Stop --_ Power OFF .................................................................................................. 13
6. Playback --_ CUE ..................................................................................................... 15
7. Playback --_ REV ..................................................................................................... 17
8. Stop --_ Fast forward (FF) ........................................................................................ 19
9. Stop --_ Rewind (REW) ............................................................................................ 23
10. Stop --_ Unloading --_ Eject ...................................................................................... 27
1-16

1. Main parts layout diagram
FE head
End sensor--
T/S LED -_
Cassette IN
switch _ /
S reel
Pinch roller
T
S reel sensor
(PH401)
Top sensor
Rotary encoder
ot.._.Q____.__.........,I,_ L__ (cam gea r>
_ [_ _ I_ "_" T reel
\ _ Cam motor
', (M903)
T reel sensor
(PH402)
Fig. 1-1
31-17

2. Tape path
TG4 TG5 ACE head Capstan motor
S reel T/S LED T reel
Fig. 2-1
4

3. Cassette IN -- Loading--- Stop
Cassette loading.
Right claw is released.
Left claw is released.
I
I
5
ICassottchol_e,s,_cs,nthe_,rcc,ono_a_owma_k0.r
Left arm swings and cassette IN lever is released form I
|
cassette IN switch. I
I Cam motor is rotated. [
1
[ Worm wheel is rotated. [
[ Cam gear is rotated. [
I FL driving gear is rotated. [
i Gear slide plate slides.
I Relay gear rotates to swing right/left arm.
t
Cassette holder is retracted to set cassette in DOWN
position.
Cassette IN switch is pressed by cassette IN lever.
(Continues to loading)
(see Page 7-8)
Cassette
Cassette IN switch
Leftclaw
IN lever
Leftarm
Cassette IN levi
Cassette holder
Cassette
Fig.3-1
Right claw
FLdriving gear
Right arm Gear slide plate
Relay gear
1-20
-_- 1-19 6

€
FL driving
gearis rotated.
ICassetteiNoperation,i
(seePages 5, 6)
TGI armloading.
(From cassette compartment operation)
I Cammotor is rotated. I
[ Wormwheel is rotated. I
[ Cam gearis rotated. [
Softbrake (T) i
is released I
form T reel. [
IMain slider slides.
ILoading gear
(S) is rotated.
I
(T) is rotated.[I to T reel from I
1 [ main brake (T).[
I ixed releasearm is operated.
I
Brakeis given
to S reel from
tension
regulatorband.
Shuttle(S)loading. I Shuttle(T) loading.
I Dmm cleaningby MC roller.
Main brake
(T) is released
fromT reel.
Soft brake
(S)is
released
from S reel.
€
RKB block is
clutched(ON)
by RKB arm.
f !
["Capstan I [Pendulum
[brakeis I compulsionarm
Ireleased I isoperated.
[fromcapstanI [Pendulumgear'_
| isfreeonT reelI
\ side only.
€
TG8arm
loading.
Upper/Lower
commu'nication
gear is rotated.
ti
TG8gear is I
I
rotated.
] :°22
Elevator gear
is rotated.
L
Pinchroller ]
moves down.
Brake is given toT
reel fromreverse
brake arm and
released
immediately.
Pinch roller
contacts
capstanmotor.
III
RKB block is [
1
rotatedthrough I
timingbelt.
Pendulumgear
engages idler
gear(S) and is
rotated.
S reelis rotated.
tape slackis /
removed. !
Capstan motor
is rotatedin
reverse.
I RKBblockis ]
rotated through
timingbelt.
Pendulumgearis l
releasedfrom
idler gear(S).
l apstan motor
stops.
Drum is
rotated. I

Pinch roller moves Capstan shaft _ Pinch arm moves in the direction of
down in the direction _ _ /arrow mark_ and contacts capstan
ofarrowmarkt_..._7/_'_...._ L shaft. /
H _C_, _ "_ 9!,_7_--_ Capstan shaft
t_,/L I"_ /1 _ _ h'_'_ "-pinch r°ller
"" _r--_ll ,Jill _ _ _'_,_11 An opening (_ is
un n given between
Elevator gear ,-----F.L_._'\" f' _,./_ _,/,_'\ "_ '-_ pinch rollor and
_" _ \Press ear _Y_/_ \Pressgear pinch block by
" g ""_ / ..... _- press gear cam.
O Press.gea! andele.vato[ gear // _Pinch'rolleris pressed in the direction
are ro_a_eei_tne direction or // of arrow marki} by the tension of spring.
arrow markU. ,/ -
Pinch block moves in the direction of
arrow mark _)through press gear cam.
Fig,3-2
Main slider moves in the direction of arrow mark O,
and RKBarm pushed up by step (_)moves in the
direction ofarrow mark I_).
_ Main slider
?arm
brock
,Timing belt
Pendulum g
Pendulum gear RKB brock
I
!_ RKB arm moves in the direction of
arrow mark e, then RKBblock moves
in the direction of arrow mark _) to
change the mesh of pendulum gear.
Timing belt
Fig.3-3
Shuttle (T)
Drum (M901)
TG1 arm
Shuttle (S)
Tension regulator
band
Fixed release arm
Soft brake (S)
Pendulum Capstan motor (M902)
compulsion (Capstan shaft)
arm TG8 arm Pinch roller
MC roller MC arm
Upper/Lower
communication
gear
FLdriving gear
Cam gear
Cam
(M903)
S reel T reel
Pendulum gear
Idler gear (S) Neutrality arm
Capstan motor
(M902)
/
Loading gear (T)
Capstan brake
Idler gear (S)
Worm wheel
Drum (M901)
_r!__,
S reel
gear
Pinch arm
Fig.3-4
gear
gear
driving gear
Upper/Lower
communication
gear
RVS brake arm
Soft brake (T)
Main brake (T)
Cam motor
(M903)
Loadinggear (S)
Main slider
Timing belt
_____ Fixed
release arm
--J4

4. Stop --* Playback
ID'_m'sr°t_'_n_"I l
Press PLAY button. [
Capstan motor is rotated.
RKB block is rotated through I
timing belt (clutch ON).
Pendulum gear is meshed with
idler gear (T) and rotated.
T reel is rotated.
If
--11--
,: Drum M901)
Capstan motor (M902) , 1
(Capstanshaft)
J
RKBbrock
T reel
Idlergear (T)
.._...j Pinch roller
Pendulum
compulsionarm
Capstan motor
RKBbrock
T re/_el
(M_02)
/
Idlergear (T) Pendulumgear Idler gear (S)
Tensionwheel
Timing belt
Fig. 4-1

5. Stop --+Power OFF
I Softbrake(T)
is operated,
' Presspower button.
I Cammotor is rotated. }
[ Wormwheelisrotated[
[ Camgear is rotated. [
Upper/Lower
communicationgear is
rotated. +
[ TG8gearis rotated, ]
I Pressgearisr°'ate_,i
Elevatorgearisrotated.
'_ If power is ON, it turns OFF
automatically about 5minutes later.
I _ai_s,i_er_._o_-I
ainbrake s 'IIRKOp e,,eisI en°u,um
is operated. Icompulsionarm
[is operated,
_ ..... Neutralityarm
is operated.
Fixedreleasearm is
operated,+
Tensionregulatorband I
i
iensionbecomesweakto ImakeS reelbrake weak.
Pinch-block [
movesin the
directionof
arrowmark
andpinch
mileris
releasedfrom
capstanshaft.
1Brakeis given [ RKBblock ]
toS/I"reel. movesdown.
t
[
RKBblock becomesfree. I
Pendulumgearis releasedfromTreel. ]
Capstan shaft
•Pinch block is operated and pinch roller
moves in the direction ofarrow mark O
until it isreleased from capstan shaft. ,,_ \
Pinch brock pin J_
./
Press gear cam /
j Pinch block
OPress gear is rotated in the direction ofarrow mark O
and pinch block pin pushed to press gear cam is
released from cam while pinch block moves in the
direction of arrow mark !_.
Fig. 5-2
Tension regulator
band
Fixed release arm
S reel
Capstan motor (M902) Elevator gear
Drum !M901) (Capsta_n shaft) Pinch roller/., Pinch arm
Main brake (S) RKI3brock Main brake (T)
Pendulum compulsion Neutrality arm
arm _'ig.s-1
Capstan motor _
Upper/Lower
commt
gear
Cam
Cam motor
(M903)
Capstan brake Drum (M901)
R
Worm wheel Pendulum gear
Idler gear (T) RKB arm
Main slider
Fixed release
arm
J7 -13- -14- J8

6. Playback CUE
Drum is rotating. I I
Capstan motor is rotated at I
high speed. I
,1
RKB block is rotated
through timing belt.
(clutch ON)
Pendulum gear and idler gear I
!
I
(T) are rotated at high speed. I
IT reel is rotated at high speed. I / Pinch roller is rotated
Ii
L
at high speed.
•_Difference from (Stop -" Playback)
(!) Capstan motor is rotating at high speed.
(g) Pendulum gear is meshed with
idler gear (T) from the beginning.
1
RKBbrock
RKBbrock
T reel
Drum(M901) Capstan motor (M902)
(Capstan shaft)
Pinch roller
Pendulumgear T reel
Idlergear (S) Idlergear (T)
Capstan motor
(Mi02)
Idlergear (T) Pendulum gear
Tension
/wheel
___ Timing belt
Fig. 6-1