Sony BVW-55 Maintenance Manual page 359

5. REVx x x x x 1 mode check (At the beginning
portion of the tape)
(1) Put the unit into the PLAY mode once, and
press the Search button (the unit enters the
search mode). And put the unit into REVx1
mode by turning the SHUTTLE dial.
(2) Check the tape running condition satisfies
the specification 3.
BVW-55 P2
[Drum entrance side]
Impedance roller
Tape should run
without contacting
Full-erase
the upper and lower
head
flanges
S4 S3
S tension regulator
[Drum exit side]
Impedance roller
Tape runs in contact
with the upper flange
T1 T2
Tape runs in contact
with the lead
Upper flange
Curl
Tape
Spec. 3: (REVx x x x x 1 mode at the beginning portion of the tape)
[Drum entrance side]
. S2 guide
Tape runs in contact with the upper flange.
. S3 guide (S tension regulator guide)
Tape runs without contacting the upper and lower flanges.
If the tape runs in contact with the upper or lower flange, tape curl is
acceptable within the range of less than 1/10 of the tape width.
. S4 guide
Tape runs without contacting the upper and lower flanges.
Even if the tape runs in contact with the upper or lower flange, tape curl
could not be acceptable.
[Drum exit side]
. T2 guide
Tape runs in contact with the upper flange.
. T3 guide (T drawer guide)
Tape runs in contact with the lower flange.
If tape curl occurs, tape curl is acceptable within the range of less than
1/10 of the tape width.
. T4 and T5 guides
Tape runs without contacting the upper and lower flanges.
Even if the tape runs in contact with the upper or lower flange, tape curl
could not be acceptable.
. T6 guide (T tension regulator guide)
Tape runs without contacting the upper and lower flanges.
If tape runs in contact with the upper or lower flange, tape curl is
acceptable within the range of less than 1/10 of the tape width.
. T7 guide
Tape runs without contacting the upper and lower flanges.
Even if the tape runs in contact with the upper or lower flange, tape curl
could not be acceptable.
Tape should run in contact with the guide roller.
5-4. Tape Running Check and Adjustment
Tape cleaner
Tape runs in contact
CTL
with the upper flange
head
S2 Drum
S1
Tape runs in contact
with the lead
Tape runs in
Tape should run
contact with the
without contacting
lower flange
the upper and lower
flanges
AT
T3 T4 T5 T6
head
Capstan
T tension regulator
Tape curl is acceptable
within the range of less
than 1/10 of the tape width
Lower flange
T7
5-17