Sony HDCAM HDW-730, Maintenance Manual

Page: 414 / 544

8-10
HDW-750/750CE V1
Check Procedure
Set the CASSE. ID MUTE to ON using the VTR
maintenance menu, A40 : PATH MODE SEL.
(Refer to Section 11-3-5.)
1. Enter the REV x x x x x 1 state
(1) Turn on the main power.
(2) Insert the torque cassette (FWD back tension).
(3) Set the
x 1 REV SEARCH to ON using the
VTR maintenance menu, A40 : PATH
MODE SEL.
(4) After pressing the PLAY button, press the
REW button.
(Both the PLAY and REW buttons on the
keyboard turn on.)
By doing this, the unit enters the REV
x 1 state.
2. REV back tension
Check that the take-up side meter reading of the
torque cassette (FWD back tension) satisfies the
specifications.
n
The REV back tension specification is different
depending on the types of S idler assembly if the
“L” mark is inscribed on the S idler assembly or
not as shown in the illustration.
If the specification is not satisfied, check whether
the value is larger or small than the specified
value and then go to step 3.
Adjustment Procedure
3. Enter the EJECT state
(1) Press the STOP button to exit the REV x 1 state.
(2) Press the EJECT button to remove the torque
cassette (FWD back tension).
4. Back tension adjustment
Change the hook position to which the adjustment
spring of the T-tension regulator assembly is
engaged.
Adjustment point
. When the tension is larger than the specified
value, change the hook position in the direction
of [
_ ] to which the spring is engaged.
. When the tension is smaller than the specified
value, change the hook position in the direction
of [
+ ] to which the spring is engaged.
5. REV back tension check after the
adjustment
Perform steps 1 and 2 of the check procedure and
confirm that the specification is satisfied.
MW
–
389
L
Cassette compartment
assembly
Torque Cassette (FWD back tension)
S idler assembly
“L” marking
S idler assembly
T-tension regulator arm assembly
Take-up side meter
The “L” marking
is inscribed on
the S idler assembly
0.00627
±
0.0011 N
.
m
(64 ± 11 gf . cm)
0.0068 ± 0.0007 N . m
(69 ± 7 gf . cm)
T5 Tape guide Specification
Metallic
White
YES
YES
NO
0.0049 ± 0.001 N . m
(50 ± 10 gf . cm)
8-1. Mechanical Adjustment
+
_
T-tension regulator assembly
T5 tape guide