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3-6-11. MEASUREMENT AND
ADJUSTMENT
OF BACK TENSION
«TOOL»
Back Tension
Meter;
VFK0132
VHS Cassette Tape(120min. tape except S-VHS tape)
A. FWD
TENSION ADJUSTMENT
«SPEC»
23g - 27g
1.
Play back the cassette tape from the beginning
and wait until the tape movement get the
stabilization (for approx. 10
to
20 seconds).
2.
Pull the Impedance Roller
in
the direction indicated
the arrow
in
Figure M34-A secure it with a piece of
adhesive tape.
3.
Insert the Back Tension Meter into the path of a
tape, and measure the back tension.
P2
PROBES
OF GAUGE
Figure M34-A Measurement of Back Tension
4.
If it
is
out of specification, replace the Tension
spring.
B.
REV TENSION ADJUSTMENT
«SPEC»
30g - 60g
1.
Play back the cassette tape
on
SP Reverse Play
mode from the beginning and wait until the tape
movement get the stabilization (for approx. 10
to
20 seconds).
2.
Pull the Impedance Roller
in
the direction indicated
by the arrow
in
Figure M34-B secure it with a
piece of adhesive tape.
3.
Insert the Back Tension Meter into the path of a
tape, and measure the back tension.
4.
If it
is
out of specification, replace the Tension
spring.
Note:
While measuring, make sure that the three
probes of the meter are
all
in
good contact
with the tape.
As the tension meter
is
very sensitive, we
recommend taking 3 separate readings.
Figure
M34-B
3-24
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