Sony HDW-750 Maintenance Manual page 430

8-2. Tape Run System Adjustment
Adjustment Procedure
8. Tape guide height adjustment
m
.
When the T3 tape guide has no lower flange, perform
[A]
the " (When the T3 tape guide has no lower
flange)"
.
When the T3 tape guide has the lower flange, perform
[B]
the " (When the T3 tape guide has the lower
flange)"
[A]
(When the T3 tape guide has no lower flange)
(1) Enter the PLAY state using the cassette tape BCT-
40HD.
(2) Loosen the set screw on top of the T3 tape guide with
the screwdriver (tool) TG adjustment, rotate the flange
from the position in which the upper flange contacts
with the tape, by 1/4 turn in order to create a gap
between the upper flange and the tape.
(3) Tighten the set screw on top of the guide.
Standard tightening torque :
_2
10 x 10 N.m (1.0 kgf.cm)
m
. The tape guide T4 is fixed and cannot be adjusted.
Do not rotate the upper flange excessively.
. The tape guides T2 and T5 do not have the set
screw on the tape guides. Adjust height by rotating
the upper flange.
Tape guide
adjustment screwdriver
Set screw
Upper flange
Tape guide
(4) Check the tape running between the capstan shaft and
the T3 tape guide. The tape running must satisfy the
following conditions.
. Tape must run in the state that the tape surface runs
flat as if it is a flat surface of a mirror.
. If tape speed deviation exists in the upper or lower
portion of a tape, the tape surface will be distorted.
The tape speed deviation must not exist.
8-26
n
If the conditions mentioned in (4) are not satisfied, adjust
the T5 tape guide height.
. When tape tension is small at the upper portion of a tape :
Move down the T5 tape guide.
. When tape tension is small at the lower portion of a tape :
Raise the T5 tape guide.
Note that the maximum allowable range of rotation of the
T5 tape guide is within one rotation when adjusting the T5
tape guide height.
[B]
(When the T3 tape guide has the lower flange)
(1) Enter the PLAY state using the cassette tape BCT-
40HD.
(2) Loosen the set screw on top of the guide with the
screwdriver (tool) TG adjustment, rotate the upper
flange until the specification 3 is satisfied.
(3) Tighten the set screw on top of the guide
Standard tightening torque :
_2
10 x 10 N.m (1.0 kgf.cm)
9. Tape running recheck at drum exit side
Perform steps 1 to 7 of the check procedure and recheck
that the specification is satisfied.
If the specification is not still satisfied, perform step 8
again.
10. Tape running recheck at drum entrance Side
Recheck the tape running at the drum entrance side as
described on the former pages.
When the Adjustment is Performed
11. Video tracking check
(Refer to Section 8-2-2.)
12. CUE/TC head height check
(Refer to Section 8-2-5.)
13. CTL head position check
(Refer to Section 8-2-4.)
14. CUE/TC head position check
(Refer to Section 8-2-8.)
15. CUE/TC output level check
(Refer to Section 8-2-9.)
HDW-750/750CE V1