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4) Rewind
Mechanism,
lf the nut C1) -is worn
out, the rewinding
roller pressure
against
feed reel will increase
gradually.
Tighten nut
(2) so that
the
rewind
operation
can
be completed within 3 minutes for a full 7"
reel tape. After
making
this adjustment,
tighten the nut (2) to
clamp the nut (1). This will be followed by lacquer fixing. Check
the tension
of takeup
reel base, contact between
brake and ree!
base, and
also for unusual
noise.
Note:
Pay particular
care
when shifting
the operating
lever
so
that its position will be correct (See Fig. 3).
§) Playback Mechanism
Pressure between
the pinch roller and capstan (flywheel shaft) is
to be gauged;
satisfactory tension is between 650 to
950g.
To
take the reading, playback the tape at 9.5cm (3-3/4")/sec. speed,
pull
the
pinch
roller
toward
you
until
the
tape
stops,
and
read
the tension
gauge.
This
process
should
be
repeated
two
or three times, and adjustment is made with coil spring (See Fig. 4).
6) Adjusting Pad
The
felt should
be
placed
so that it will come
into contact
with
the head
core
slit at the right angle and
that
the center
of the
felt properly meets the core slit section.
The
felt should
firmly
contact
the entire
width
of the tape.
The pressure
between
the
pad and head should be measured,
satisfactory tension is between
20 to 25g.
MAINTENANCE
1, Oiling
(Lubrication)
When
excessive
oi] is applied, it may overflow
along the shaft
and
adhere. to the
rubber
parts of the belt and
pinch roller,
causing slipping,
wow
or flutter. Care should be taken to limit
the amount
of
oj! applied
or on
how to oil.
2. Oiling
Parts.
Pinch Roller (Fig. 5),
Flywheel Shaft (Fig. 6),
Rewind
Roller
(Fig. 7),
Motor,
Reel Base
and Reel Base Pulley (Fig. 8),
Counter
and
Pulley,
idler
3. Oiling
of Other
Parts.
Oiling of the revolving
parts
is mentioned
above.
It is essential
to
clean
and
oil
metal-to-metal
contact
surface,
shaft
and
bearing
of each lever at least once a year.
4, Cleaning the Tape Transport Sections.
The tape
travels from the feed
reel
to
pinch roller through
two tape
guides,
erasing
head,
recording
head,
pad,
tape
guide and capstan.
When
dust or ferrous powder on the tape
adheres to these parts, insufficient erasing, non-recording, poor
high tones,
less volume
and
slipping
may
pesuly Utmast
care
should be taken
to clean
these
parts. |
Parts such
as tape guide,
each
head, pinch roller and
capstan
should
be throughly
cleaned with a soft
aol or gauze soaked
in carbon
tetrachloride.
5. Oiling
Rotating
Parts.
All rotating
parts of this set
are
of oil-less
metal,
except for
reel spindle,
rewind
roller,
and fast forward
roller.
To insure
smooth
functions,
oil-less
metal
parts are sealed from expo-
sition
to
air.
Accordingly,
these parts
must
be
disassembled
before
applying lubricant.
6. Storing
|
Before
closing the lid of tape recorder
«--+:- after
operation
or when
storing <crrrrrtrtteeee
make
sure the control is set to
"STOP"
position.
Plate Spring
tig. 3
Coil Spring
Capstan (F lywheel
Pinch Roller
Tape
': Tension Gauge
Fig. 4
C Washer
eee
-— Nylon Washer
Felt -—~+C—7}
ae
Pinch Roller
Shaft
Fig. $
C Washer
Flywheel Shaft
Cap
Felt —
Bearing (illess Metal)
Chassis
Flywheei
Fig. 6
—
Roller Shaft
lon Wash
a i
ical
Rewinding Roller
|
Rewing
Nylon Washer
baker
Washer ———-—_——-.-<mn
nik sii paar
as
Fig. 7
Felt
-Mounting Screw
Takeup Reel Base Shaft
Mounting Plate
ere
ee
a
ee
a
eet
Chassis
e
Mounting Plate
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