Sony BVW-55 Maintenance Manual page 375

7. Check the AT head position
Check that the positional relationship between the
rising edges of CTL and PB TC waveform signals
satisfies the specification.
If the specification is not satisfied, perform steps
8 and later.
Adjustment procedure
8. Loosen the screws
Loosen the securing screw shown in the figure by
a turn.
9. Adjust the AT head position
(1) Insert a 2 mm flatbladed screwdriver into the
notch of the AT head assembly.
(2) Adjust the AT head assembly position so that
the specification is satisfied.
10. Tighten the screws
Tighten the screw loosened in step 8.
Tightening torque:
_2 N.m {0.9 kgf . cm}
9 x 10
11. Recheck the AT head position
Refer to steps 6 and 7 in this section.
In Case the Adjustment is Performed
12. Check the AT head height
(Refer to Section 5-9.)
13. Check the AT head azimuth
(Refer to Section 5-10.)
14. Check the AT head head-to-tape
contact
(Refer to Section 5-11.)
15. Check the AT head position
Refer to steps 6 and 7 in this section.
n
After adjustment are completed, be sure to set
S100-1 switch on the SV-206 board to OFF
position.
BVW-55 P2
. Alignment Tape: CR2-1B
TC
(CH-1)
CTL PULSE
(CH-2)
Spec. : A = 0 ±400us
Notch
Securing screw
. Alignment Tape: CR2-1B
TC
(CH-1)
CTL PULSE
(CH-2)
Spec. : A = 0 ±400us
5-8. AT Head Position Check and Adjustment
A
AT head
A
5-33