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Model
JMECHA
Pages
41
Size
1.29 MB
Type
PDF
Document
Service Manual
Brand
Device
VCR / DV MECHANICAL ADJUSTMENT MANUAL VI
File
jmecha.pdf
Date

Sony JMECHA Service Manual ▷ View online

— 21 —
3-13.LS Cam Plate, Tension Coil Spring (Brake-S), Brake-S,
Torsion Coil Spring (Brake Arm), Cassette Position Set-S,
Brake-S Driving Arm Assy
1.
Removal procedure
1)
Remove the screw (M1.4 
×
 1.4) 1.
2)
Remove the LS cam plate.
3)
Remove the tension coil spring (brake-S).
4)
Remove the brake-S.
5)
Remove the screw (M1.4 
×
 2) 2.
6)
Remove the torsion coil spring (brake arm).
7)
Remove the cassette position set-S from groove of the LS block
assy in the direction of the arrow A.
8)
Remove the brake-S drive arm assy from groove of the LS
block assy in the direction of the arrow B.
2.
Attachment procedure
1)
Insert the brake-S drive arm assy under groove of the LS chassis
block assy.  Attach the brake-S drive arm assy to the brake-S
arm shaft and to the brake-S pivot shaft.
2)
Insert the cassette position set-S under the groove of the LS
chassis block assy.  Attach the cassette position set-S to the
brake-S arm shaft.
3)
Attach the torsion coil spring (brake arm).
4)
Attach the screw (M1.4 
×
 2) 2 to the brake-S arm shaft.
5)
Attach the brake-S to the brake-S arm bearing and to the brake-
S pivot shaft.
6)
Hook the tension coil spring (brake-S) to the spring stay of the
cassette position set-S and the spring stay of the brake-S.
7)
Align the slot of the LS cam plate with the dowel.  Move then
in the direction toward the arrow C and attach the screw (M1.4
×
 1.4) 1.
8)
Perform the LS cam plate position adjustment referring to
section 3-11.
Fig. 3-13
LS cam plate
Tension coil spring 
(brake-S)
Tension coil spring (brake-S)
Brake-S drive arm assy
Brake-S
Torsion coil spring (brake arm)
Cassette position set-S
2
 Screw (M1.4 
×
 2)
Screw (M1.4 
×
 2)
1
 Screw (M1.4 
×
 1.4)
1
 Screw 
     (M1.4 
×
 1.4)
Cassette position set-S
Cassette position set-S
Brake-S
Brake-S drive arm assy
LS cam plate
LS chassis block assy
Torsion coil spring (brake arm)
Insert the brake-S drive arm 
assy under groove of the LS 
chassis block assy.
Brake-S arm shaft
Brake-S pivot 
shaft
Dowel
Dowel of LS chassis 
block assy
Insert the cassette position 
set-S under the 
groove of the LS 
chassis block assy.
A
B
B
C
C
— 22 —
3-14.TG7 Block Assy, Torsion Coil Spring (TG7 Return, Pinch Return), Pinch Arm Assy
1.
Removal procedure
1)
Remove the TG7 block assy in the direction of the arrow A.
2)
Remove the torsion coil spring (TG7 return) 1.
3)
Remove the pinch arm assy in the direction of the arrow B.
4)
Remove the torsion coil spring (pinch roller return) 2.
2. Attachment procedure
1)
Install the torsion coil spring (pinch roller return) 1.  (Insert
the 90-degree-bent portion of the torsion spring into the square
hole of the LS chassis block assy.)
2)
Attach the pinch arm assy to the pinch arm bearing.
3)
Attach the torsion coil spring (TG7 return) 1.
4)
While aligning the TG7 block assy with the groove of the LS
chassis block assy, install the TG7 block assy into the TG7
block assy bearing.
Fig. 3-14
TG7 block assy
TG7 arm bearing
Pinch arm bearing
Groove of LS chassis 
block assy
Square hole
TG7 block assy
Pinch arm assy
Pinch arm assy
2
 Torsion coil spring 
     (pinch roller return)
Attachment position of 
torsion coil spring
2
 Torsion coil 
     spring 
     (pinch roller return)
1
 Torsion coil spring (TG7 return)
1
 Torsion coil spring 
     (TG7 return)
Insert into groove of the 
LS chassis block assy
B
A
Longer one
— 23 —
3-15.Layout Diagram of FP-102 Flexible Wiring Board
1.
Removal procedure
1)
Remove the sensor holder-T from groove of the LS chassis
block assy in the direction of the arrow A.
2)
Remove the cassette holder-S by pushing out the hook under
the LS chassis block assy towards the direction of the arrow
B
.
Fig. 3-15
FP-102 flexible wiring board
FP-102 flexible wiring board
LS chassis block assy
LS chassis block assy
Sensor holder-S
Sensor holder-T
D901 diode
H901 HALL element
H902 HALL element
S903 push lever switch
Push out the hook.
LS chassis block assy
B
A
— 24 —
3-16.TG1 Cam Slider, LS Arm, LS Roller, Mode Gear Assy, LS Guide Roller
1. Removal procedure
1)
Remove the TG1 cam slider.
2)
Remove the LS arm.  (At this moment, be careful that the LS
roller can come out of cam gear A groove.)
3)
Remove the LS roller from the LS arm.
4)
Remove the LS guide roller.
2. Attachment procedure
1)
Coat inside the LS guide roller with grease (1/4 drop of grease)
and insert it into the LS guide shafts S1 and S2.
2)
Coat outside the LS guide roller with grease (1/2 drop of grease)
at the two points as shown.
3)
While aligning dowel of the TG1 drive arm with groove of the
mode gear assy, insert the TG1 drive arm into the LS guide
shaft S1.
4)
Coat the portion A of the LS arm with grease (1/4 drop of
grease) and insert the LS guide roller.
5)
Coat both sides of the groove of the cam gear A with grease (1/
2 drop of grease).  Insert the LS guide roller into groove of the
cam gear A and insert the LS arm into the LS guide shaft S2.
6)
Insert the TG1 cam slider into the three positions of the LS
guide shaft S1, S2 and slider guide shaft.  Insert dowel of the
TG1 cam slider into groove of the cam gear A.
7)
Be careful that greasing points are correct, amount of grease is
correct and the LS arm and the TG1 drive arm are not floating.
Fig. 3-16
TG1 cam slider 
TG1 drive arm
LS arm
LS arm
LS roller
Shaft
Coat the area of 
0 to 1 mm or less 
from the end surface 
of top of shaft
Mode gear assy
Slider guide shaft
Dowel
Dowel
Overlap it with gear and coat them with grease
LS R
J
M AA a
Œ Ø B
Insert the LS roller into 
groove of cam gear A
Coat outside the LS guide 
shaft S2 with grease
Coat outside the LS guide 
shaft S1 with grease
When attaching it, coat the hatched        portion with grease. 
Cam gear A
Coat inside the LS guide 
roller with grease
A
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