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SECTION
3
| TC-766-2
TC-766-2
|
ADJUSTMENTS
3-1.
MECHANICAL
ADJUSTMENTS
Tape Path Adjustment
1.
In playback mode, travel a blank tape SLH-S1,
and
adjust
the
positions
of the
tension-arm
guide and intermediate pin.
adjustment screws (hexagonal socket)
Tape should travel
in the center of
this width.
After
the adjustment,
tighten the adjustment
SCreWS.
Travel a blank tape SLH7-740
and adjust the
position
of the tape guides to eliminate tape
curls.
0.375 mm
nl tt
im Hi== i
0.025mm
tape guide
tape guide
erase head
3.
Travel
a blank
tape
SLH-S1
and
adjust the
height of each head for the specified clearances.
To adjust the erase head height, select appro-
priate spacer.
To adjust the record and playback heads, turn
the height/zenith adjustment screws in the same
angle and direction.
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2track J Latrack
@ PLAYBACK HEAD
height/zenith adjustment screws
After the adjustment,
apply a suitable locking
compound
to the adjusted screws.
Reel Table Height Adjustment
— playback and rewind modes
—
1.
Loosen
the adjustment
screws and adjust the
height of the reel tables for the specified height.
2.
If the tape touches the reel in playback, fast
forward and rewind modes, recheck the tension
arms, standard reels and the tape.
Pinch
Roller Lever Position Adjustment
Remove the head cover.
Reattach both the pinch rollers.
Place the set in the playback mode.
Check that
the solenoid is in on condition (energized).
Loosen
the
adjustment
screw
and
push
the
slide adjustment plate in the arrowed direction
for the specified clearance between
the pinch
roller levers A and B, and tighten the adjust-
ment
screw.
After the adjustment,
apply a suitable locking
compound to the adjustment screw.
pinch roller lever B
pinch roller (right)
sliding adjustment plate
adjustment screw
Tape should travel in the center of this width.
7" standard
tape reels
reel tables
SC4x6
adjustment screws
(hexagonal socket)
screws
Brake Adjustment (1)
Adjust both the supply- and take-up-side brakes.
1.
In
stop
mode,
0.5—0.7 mm
clearance
should
exist between
the brake-band
guide and brake
band.
In playback
mode
(the brake solenoid should
be in ON
condition),
loosen
the adjustment
screw
and adjust the position of the solenoid
link in the arrowed direction so that the brake
band and brake-band guide uniformely touch.
Note:
If the brake-release
stroke is long, the
brake band may bend at the position
shown with *.
Be sure not to bend the
brake band.
3.
After the adjustment,
apply a suitable locking
compound
to the adjustment screw.
Brake Adjustment (2) and Brake Torque
Adjustment
Adjust both the supply- and take-up-side brakes.
In stop
mode,
loosen
the
adjustment
screw
and adjust the position of the brake stopper for
the
specified
clearance
between
the
brake
stopper and brake lever.
After the adjustment,
tighten
the adjustment
screw and apply a suitable locking compound
to the screw.
Measure both the forward and backward
brake
torques.
Adjust
spring-hook position for the
specified torques.
backward
torque:
1,800—2,500g-cm
(25—34 oz-inch)
forward torque:
600—700 g-cm
(8.5--9.5 oz-inch)
adjustment screw
brake solenoid
Note: Adjustment
screw positions for the 2T
PB and 4T PB heads are the same as the
2T REC
head.
Azimuth
adjustment screws are so con-
structed
to react each other.
Take care
in adjusting azimuth adjustment screw.
height/zenith adjustment screws
e
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PLAYBACK
HEAD
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atrack J Latrack| -
one @8
@
angle adjustment
brake band shoe
brake band
brake band guide
In playback mode,
the
brake band should
uniformely touch the
brake band guide at
here.
brake drum
ye
PP
ss
band
0.5—0.7 mm
(5/64)
In playback
mode,
this
clearance should even.
brake stopper
brake lever
Adjust hooking
position.
backward
adjustment
screw
brake arm
Forward
reel table
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