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TOSHIBA V 856 B
Mechanical Adjustments
Cont'd
- Winen mounting, push the cutout (A) on the
holder center post assembly (2) aligning with
the projection on the mechanical deck.
* Screw tightening torque is 294 - 392 mNem {3
- 4 kgecm).
* Before mounting the center gear pulley, apply
a few drops of oil. (Refer to Fig. 6-34-1.)
1-6-36. REC inhibiting Lever Repitacement
1. Remove the top bracket. (Refer to item "1-6-
1. Top Bracket Replacement".}
2. Remove the cassette hoider assembly. (Refer
to item "1-6-2. Cassette Holder Assembly
Replacement".}
3.Remove the cam slider. (Refer to item '1-6-
41. Cam Slider Replacement".)
4. Remove the tension spring (2).
5. Undo the claw (A) on the S soft brake (1)
sliding and lifting it upward.
6. Remove the projection (B) on the REC
inhibiting lever (3) sliding in the direction
shown by the arrow and lifting it upward.
7. After replacing the REC inhibiting lever (3),
mount the parts in the reverse order of
removal.
Tension spring (2}
REC-inhibiting
bever (3}
Projection {B)
Fig. 6-36-1
1-6-37. S, T Main Brake Assembly Reptace-
ment
1. Remove the mechanical deck from the main
PC board and turn the mechanical deck
upside down.
2. When replacing the T main brake assembly
(2), first remove the idle kick lever (3). (Refer
to item "1-6-34. Idle Arm Assembly Replace-
ment".)
3. Remove the tension spring (4).
4. Remove the claws on the 5, T main brakes
(1), (2) from the mechanical deck lifting the S,
T main brakes (1), (2) upward.
5. After replacing the S, T Main brake assem-
blies (1), (2), mount the parts in the reverse
order of removal.
Note:
* When mounting the S, T main brake assem-
blies (1}, (2) take care that both ends of the S,
T main brakes (1), (2), do not touch the gear
of the reel table.
Idle kick lever (3)
SS a
T reel table
4
T main
brake (2)
Tension
spring (4)°
Fig. 6-37-1
S main brake (1)
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1-6-38. S Soft Brake Replacement
1. Remove the cam slider. (Refer to item "1-6-
41. Cam Slider Replacement.")
2. Remove the drive arm assembly. (Refer to
item "1 -6-5. Drive Arm Assembly Replace-
ment' .}
3. Remove the S soft brake spring (1).
4. Remove the S soft brake (2) after removing
the claw (A) on the S soft brake from the
mechanical deck.
Note:
+ When mounting the S soft brake spring (1),
take care not to deform the hook (B).
- When mounting the S soft brake (2), take care
of the band brake (3).
S soft brake spring (1)
75 Soft
* prake (2)
S reel table
assembly
\pand
brake (3)
REC-inhibiting
jever
Fig. 6-38-1
1-6-39. TF Soft Brake Replacement
1. Remove the T soft brake spring (I).
2. Remove the claw (A) on the T soft brake (2)
from the mechanical deck and remove the fT
soft brake (2).
3. After replacing the T soft brake (2), mount the
parts in the reverse order of removal.
Note:
* When mounting the T soft brake spring (1),
take care not to deform the hook (B).
* Take care not to touch the surface (C) on the
brake pad.
T soft brake spring (1)
Hook (B)
|
T soft brake {2)
T reel
table assembly
Fig. 6-39-1
1-6-40. Drive Lever Replacement
1. Remove the top bracket. (Refer to item "1-6-
1. Top Bracket Replacement.)
2. Remove the cassette holder assembly. (Refer
to item "1-6-2. Cassette Holder Assembly
Replacement".)
7
3. Remove the drive arm assembly. (Refer to
item "1-6-5. Drive Arm Assembly Replace-
ment".}
4. Remove the cam slider. (Refer to item "1-6-
41. Cam Stider Replacement".)
5S. Remove
the Loading Drive Assembly.
(Refer
to item "1-6-29. Loading Drive Assembly
Replacement."}
6. Remove the drive lever (1).
7. After replacing the drive lever (1), mount the
parts in the reverse order of removal.
Note:
* Be sure to align the phase of the cam gear
(2). (Refer to itern "1-6-41. Cam Slider
Replacement".}
+ Mount the drive lever (1) so that it is posi-
tioned between the mark (A) on the mechani-
cal deck and the outsert (B).
* Apply grease to the surface between the mark
(C) on the mechanical deck and the drive
lever shaft (D).
Hole far phase matching
Orive lever {*)
Hole for
phase
a S
merce
SS
'oe
Drive lever:
i
%
post
Apply grease:
Apply grease
Fig. 6-40-1
Marking {C)
1-6-41. Cam Slider Replacement
1. Remove the top bracket and the cassette
holder assembly. (Refer to item "1-6-1. Top
Bracket Replacement and 1-6-2. Cassette
Holder Assembly Replacement".)
2. Remove the tension spring (1).
3. Turn the hook lever assembly (2)
counterclockwise and turn the S soft brake (3)
counterclockwise.
4. Move the cam slider (4) to the right and align
the projection (A) on the mechanical deck and
the cutout portion (B) on the cam slider (4).
5. Remove the claw (C) on the cam slider (4)
and remove the cam slider (4) lifting the cam
slider (4) upward.
Hook lever assembly (2)
Tension drive lever
S soft brake (3)
Cam slider {4}
ate Pts es
|
\
Ciaw (C}
er {B}
Fig. 6-41-1
Tension spring (1)
6. Apply grease on the shaded portion of a new
slider for the replacement.
7. Mount the parts in the reverse order of
removal. After inserting the cam slider, slide it
to the left direction till it stops. (Fig. 626-2
shows this condition.)
Note:
« When mounting the cam slider (4), slide the
tension drive lever in the direction shown by
the arrow (counterclockwise).
- After completion of the replacement, confirm
that the cam slider (4) can slide to left and
right directions smoothly.
Apply grease
Apply grease
( inside Claw (C) )
Cam slider top side
Apply grease,
Apply grease.
Cam
slider bottom side
Fig.6-41-2
©
1-6-42. idie Centering Lever Replacement
1. Remove the cam slider. (Refer to item "1-6-
41. Cam Slider Replacement".)
2. Remove the claw on the idle centering lever
(4) and remove the idle centering lever (1)
lifting it upward.
3. After replacing the idie centering iever (1),
mount the part in the reverse order of
removal.
tdle centering
lever (1)
Idie arm
assembly
Fig. 6-42-1
1-6-43. Capstan Motor Replacement
1. Remove the reel belt (14).
2. Remove one screw (2) from the bottom of the
mechanical deck, and remove the PC board
(3).
Note:
* Take care not to misuse the screw with others.
Screw (2)
PC board (3)
Reel belt (1}
Fig. 6-43-1
3. Remove the capstan motor (4) after removing
three screws (5).
Note:
» Take care not to drop the capstan motor.
Screws (5)
Mechanical
deck
Capstan
motor {4}
Fig. 6-43-2
4. Take care not to damage and scratch the
motor itself, and mount the capstan motor (4}
fitting the hole (A) on the mechanical deck
and the hole (B) on the capstan motor (4).
Hole {B)
Capstan motor (4}
Mechanical
deck
Fig. 6-43-3
5. Mount the capstan motor (4) with three
screws (5) viewing from the top side of the
mechanical deck.
Capstan motor
shaft
(
_
Fig. 6-43-4
No clearance is allowed.
Note:
* Do not use once-removed screws again.
* Take care that no clearance is allowed when
securing three screws.
6. After replacement, mount the parts in the
reverse order of removal.
Note:
¢ In this case, take care not to twist the reel belt
and stick the grease or etc. on it.
7. After replacing, perform the adjustment
according to the tape transport adjustment
procedures.
1-6-44. S-VHS Switch Assembly Replacement
{S-VHS model only)
1. Slide the cassette holder assembly (1) until
the screw (2) can be seen from the hole on
the top bracket (3).
2. Insert a screwdriver from the hole provided on
the top bracket (3) and secure the screw (2).
3. Remove the S-VHS switch assembly (4)
upward.
4. After completion of the replacement, mount
the parts in the reverse order of removal.
Cassette hokder
assembly (+)
Screw (2)
S-VHS SW
assembly (4)
1-7. Check and Adjustment
1-7-1. Check of Tension Pole Position
1. Turn the worm wheel counterclockwise after
removing the cassette holder assembly on the
front loading mechanism, and set the cam
gear at playback position.
2. Turn the S reel table assembly (1) clockwise
slowly.
3. Adjust the adjuster (3) counterclockwise from
the position shown in Fig. 6-23-1 so that the
clearance between the left end of the tension
lever assembly (2) and the !eft side of the
mechanical deck becomes 7.5 +1mm.
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