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3-7. FWD Back-tension Adjustment
1.
Adjustment procedure
1)
Install the Mini DV torque cassette (Ref. No. J-6).
2)
Set the [RP] mode. Confirm that the torque reading of the
supply side is in the range of 0.45 to 0.55 mN•m (4.5 to 5.6
g•cm) including fluctuation. If the torque reading is outside
the specified range, perform the following adjustment.
supply side is in the range of 0.45 to 0.55 mN•m (4.5 to 5.6
g•cm) including fluctuation. If the torque reading is outside
the specified range, perform the following adjustment.
• If the torque reading value is higher than the specification:
(Reduce the spring tension as follows.)
Shift the hook position of the tension coil spring in the direction
of A.
Shift the hook position of the tension coil spring in the direction
of A.
• If the torque reading value is lower than the specification:
(Increase the spring tension as follows.)
Shift the hook position of the tension coil spring in the direction
of B.
Shift the hook position of the tension coil spring in the direction
of B.
Fig. 3-8
3-8. Reel Torque Check
1.
Check procedure
[FWD torque]
1)
Install the Mini DV torque cassette (Ref. No. J-6).
2)
Set the FWD mode. Confirm that the center of the T-reel table
torque reading value is 0.54 to 1.32 (mN•m) (5.5 to 13.5 g•cm)
and the fluctuation value is 0.39 to 0.40 (mN•m) (3.9 to 4.0
g•cm).
torque reading value is 0.54 to 1.32 (mN•m) (5.5 to 13.5 g•cm)
and the fluctuation value is 0.39 to 0.40 (mN•m) (3.9 to 4.0
g•cm).
[RVS torque]
1)
Install the Mini DV torque cassette (Ref. No. J-6).
2)
Set the RVS mode (by using the EDIT SEARCH (–) button of
the machine). Confirm that the center of the S-reel table torque
reading value is 1.37 to 2.11 (mN•m) (14 to 21.5 g•cm) and the
fluctuation value is 0.39 to 0.40 (mN•m) (3.9 to 4.0 g•cm).
the machine). Confirm that the center of the S-reel table torque
reading value is 1.37 to 2.11 (mN•m) (14 to 21.5 g•cm) and the
fluctuation value is 0.39 to 0.40 (mN•m) (3.9 to 4.0 g•cm).
If either of the above specifications is not satisfied, check whether
the tension regulator band has any abnormality. If it has no
abnormality, replace the corresponding reel table.
the tension regulator band has any abnormality. If it has no
abnormality, replace the corresponding reel table.
TG1 assy
LS block assy
Tension coil spring
(tenstion regulator)
(tenstion regulator)
A
B
3-9. TG3 Guide Zenith Adjustment
1)
Remove the drum referring to section 3-1. Install the dummy
drum (Ref. No. J-9).
drum (Ref. No. J-9).
2)
Install the TG36 gauge (Ref. No. J-10) on top of the dummy
drum. Rotate the slant adjustment zenith screw until the TG3
guide and TG36 gauge (Ref. No. J-10) become parallel.
drum. Rotate the slant adjustment zenith screw until the TG3
guide and TG36 gauge (Ref. No. J-10) become parallel.
3)
Remove all the jigs. Attach the original drum back in its original
position referring to section 3-1.
position referring to section 3-1.
4)
Clean the TG3 and TG4 guides referring to section 2-2.
5)
Perform the tape path adjustment. (Refer to section 4, “Tape
Path Adjustment”.)
Path Adjustment”.)
Fig. 3-9
Slant adjustment
zenith screw
zenith screw
TG3 guide
TG4 guide
Dummy drum
TG36 gauge
Roller and TG36 gauge must
be parallel.
be parallel.
TG3 guide
TG36 gauge
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