Sony BVW-55 Maintenance Manual page 360

5-4. Tape Running Check and Adjustment
6. Tape running condition check around
capstan shaft
(1) Put the unit into the REW mode at the end
portion (50 min. to 60 min.) of the S cassette
tape without lid (BCT-30MA). When the
rewind speed is put into a uniform, change
the mode from REW to F FWD.
Just as the mode was changed, check the tape
running condition between T4 guide and
capstan shaft, and between capstan shaft and
T5 guide meet the specification 4.
(2) Repeat the step (1) three times, and check the
tape running conditions meet the specifica-
tion 4.
If not, perform step 7 and later.
(3) Put the unit into the F FWD mode at the end
portion (50 min. to 60 min.) of the S cassette
tape without lid (BCT-30MA). When the fast
forward speed is put into a uniform, change
the mode from F FWD to PLAY.
Just as the mode was changed, check the tape
running condition between T4 guide and
capstan shaft, and between capstan shaft and
T5 guide meet the specification 4.
(4) Repeat the step (3) three times, and check the
tape running conditions meet the specifica-
tion 4.
If not, perform step 7 and later.
5-18
T4 guide
Wrinkles
Pinch roller
Spec. 4:
Tape runs without any wrinkle.
If the tape wrinkle occurs, check the tape wrinkle disap-
pears within 1.5 second and do not damage the tape.
Capstan
T6 guide
(T tension regurator)
T5 guide
Wrinkles
BVW-55 P2