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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

— 13 —
3-2. L. Motor Holder Block Assy (Loading) and
FP-228 Flexible Wiring Board (DEW Sensor)
1.
Removal procedure
1)
Remove soldering 2 from the L motor holder block assy
(loading).  Remove the FP-100 flexible wiring board.
2)
Remove soldering 3 from the flexible wiring board FP-100.
Remove the FP-228 flexible wiring board (DEW sensor).
Note:
Since the FP-228 flexible wiring board (DEW sensor) is attached to
the motor shield by adhesive agent, be careful not to break the flexible
board when removing soldering.
3)
Remove the screw (M1.4 
×
 2.5) 1.
4)
Remove the L motor holder block assy.
5)
Unlock the claw E and remove the worm shaft.
6)
Remove the motor shield.
7)
Unlock the two claws A of the motor holder.  Remove the L
motor block assy (loading) in the direction of B.
Note:
Be careful not to touch the DEW sensor.
2.
Attachment procedure
1)
Check the direction of the polarity marking C of the L motor
block assy (loading).  Attach the L motor block assy (loading)
to the motor holder so that the L motor block assy (loading)
faces the worm shaft side.
2)
While aligning the slot and dowel with the motor shield, attach
the motor holder to the motor holder.
3)
Apply grease (1/2 drop) between the worm shaft gear and gear
tooth.
4)
While the worm gear is engaged with the worm shaft gear,
insert the worm shaft tip into the groove B and fix the worm
shaft under the claw E.
5)
While aligning the chassis’s two square holes with the two round
holes, attach the motor holder block assy with the screw (M1.4
×
 2.5) 1.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)
6)
Connect FP-228 (DEW sensor) to the FP-100 flexible wiring
board by soldering.  Attach the DEW sensor to the motor shield.
7)
Connect the FP-100 flexible wiring board to the motor holder
block assy (loading) by soldering.
Fig. 3-2
1
 Screw (M1.4 
×
 2.5)
2
 Remove 
     soldering.
3
 Remove soldering.
L motor holder block assy
FP-100 flexible wiring board
L motor block assy (loading)
Motor holder
Pin 
(The pin must enter 
into the polarity 
marking hole.)
FP-228 flexible wiring board 
(DEW sensor)
Worm shaft
Motor shield
L motor holder 
block assy
Deceleration gear
Align the chassis's two square holes 
with the round holes. 
Note:  Be careful not to override.
C
 Polarity 
    marking hold
Polarity marking hold
Motor worm
When attaching it, 
align the notch with 
the dowel.
When attaching it, 
align the notch with 
the protrusion.
A
A
B
E
 Claw
D
When attaching it, coat the hatched      portion with grease. 
— 14 —
3-3. Retainer Plate Assy, LED Retainer
1.
Removal procedure
1)
While pressing the claw of the LED retainer in the direction of
the arrow A, remove the LED retainer.
2)
Remove the LED portion 2 of the FP-102 flexible wiring
board.
3)
Remove the two screws (M1.4 
×
 1.4) 1.
4)
In order to remove the retainer plate assy, because it is hooked
with shaft A, shaft B and shaft C, remove the retainer plate
assy while moving it in the direction of the arrow B.
2.
Attachment procedure
1)
Hook shaft A, shaft B and shaft C on notch A, notch B and
notch C of the retainer plate assy in this order.
2)
Attach the retainer plate assy with two screws (M1.4 
×
 1.4) 1.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)
3)
Route the FP-102 flexible wiring board as shown and install
the LED into the prism as shown.
4)
Hook the LED retainer on D, attach it to E and fix them.
Fig. 3-3
Routing the FP-102 flexible wiring board
2
 FP-102 flexible wiring board
Retainer plate assy
Retainer plate assy
Retainer plate assy
Notch B
Notch C
Notch A
Brake-S pivot shaft
Retainer plate assy
Claw on top of TG1 assy
TG1 ASSY
2
 FP-102 flexible wiring board
Route it so that the 
flexible board is placed 
above the LED retainer.
Flexible board is routed 
under the LED retainer.
LED retainer
LED retainer
LED
Prism
Shaft A
Shaft A
Shaft B
Shaft B
Shaft C
Shaft C
1
 Two screws
     (M1.4 
×
 1.4)
A
B
D
E
Brake-T pivot shaft
— 15 —
3-4. Brake-T Block Assy, T-reel Table Assy, Gooseneck Gear Assy
1.
Removal procedure
1)
Remove the brake-T block assy from the brake-T pivot shaft.
2)
While pressing the reel claw retainer A of the T-reel table assy
down in the direction of B, remove the reel claw C.
3)
Remove the gooseneck assy from the relay gear shaft.
Note:
Be careful not to break the reel claw.
2.
Attachment procedure
1)
Insert the gooseneck gear assy into the center hole of the relay
gear shaft.  Bend the gooseneck gear assy to the S-reel table
assy side.
2)
Attach the brake-T block assy to the brake-T pivot shaft D.
3)
Move the brake-T counter-clockwise so that T-brake is freed.
While pressing down the reel claw of the T-reel assy, fix the T-
reel to the reel shaft-T by rotating the reel.
4)
Check that the brake spring-T works correctly by rotating the
T-reel table assy 30 degrees in the clockwise and counter-
clockwise directions.
Note:
The retainer on top of the brake spring-T must be hooked on the
brake-T pivot shaft D and moved down to the groove.
Fig. 3-4
 
B
 
C
 
A
Gooseneck gear assy
T-reel table assy
Gooseneck gear assy
Relay gear shaft
Relay gear shaft
Brake-T block assy
Brake-T
Brake gear-T
Move the brake-T counter-clockwise 
so that the T-brake is freed.  
 
D
 Brake-T pivot shaft
Brake-T block assy
Brake spring-T
T-reel table assy
S-reel table assy
 
E
 Reel shaft-T
 
D
 Brake-T pivot shaft
When attaching it, 
bend the gooseneck gear 
assy to the S-reel table 
assy side.
Move the brake-T 
counter-clockwise so that 
the T-brake is freed.  
Brake gear-T must be positioned so that 
its steps face downward.
— 16 —
3-5. TG1 Assy, Tension Coil Spring (Tension Regulator)
1.
Removal procedure
1)
Remove the screw (M1.4 
×
 2.5) 1.
2)
Remove the tension coil spring.
3)
Remove the TG1 assy tension regulator band.
4)
Remove the (FWD) adjustment plate from the S-reel table.
Place it between the T-reel table assy and pinch arm assy.
5)
While pressing down the reel claw retainer A of the S-reel
table assy in the direction of B, remove the reel claw C.
Note 1:
Be careful not to deform the tension regulator band.
Note 2:
Be careful that grease does not attach to the tension regulator band.
2.
Attachment procedure
1)
Coat the root and its surroundings on TG1 pivot shaft A with
grease (1/4 drop).  (Strictly observe the coating position and
specified amount of grease.)
2)
Attach the S-reel table assy to the reel shaft-S.
3)
Attach the TG1 assy to the TG1 pivot shaft A.  Note that the
TG1 drive shaft has entered the groove of the LS block assy at
this moment.
4)
Wrap the tension regulator band around the S-reel table assy.
Fix it with the screw (M1.4 
×
 2.5) 1 while ensuring that
direction of the (FWD) adjustment plate is correct as shown.
5)
Hook the tension coil spring 2 on the TG1 assy and on the LS
chassis block assy.
6)
Clean the tip of the TG1 pivot shaft with a super-fine applicator
(Ref. J-3) moistened with cleaning fluid.
7)
Perform the (FWD) position adjustment referring to section 3-
6.
8)
Perform the FWD back-tension adjustment referring to section
3-7.
9)
Perform the reel torque check referring to section 3-8.
Fig. 3-5
S-reel table assy
2
Tension coil spring 
    (tension regulator)
2
Tension coil spring (tension regulator)
TG1 Assy
(FWD) 
adjustment 
plate
A
 TG1 pivot shaft
Reel shaft-S
1
 Screw (M1.4 
×
 2.5)
1
 Screw (M1.4 
×
 2.5)
S-reel table assy
When attaching it, coat the hatched       portion with grease.
FLOIL grease (SG-941): Part No. 7-662-001-39
Tension regulator band
TG1 Assy
LS chassis block assy
Be sure that the arm shaft has 
entered the groove.
Correct direction 
of attachment
LS chassis 
block assy
Tension 
regulator band
Confirm that the direction 
of the (FWD) adjustment plate is 
correct.
B
C
A
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