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5-2. Check and Adjustment of FWD/RVS Back-tension
1. Check Procedure
1)
1)
Install the mechanism deck in the main unit and set the take-up
torque cassette (Ref. No. J-6).
torque cassette (Ref. No. J-6).
2)
Enter the PLAY mode.
3)
Check the FWD torque as follows.
• Check the FWD torque of the T reel side in the PLAY mode.
• Check the FWD torque of the T reel side in the PLAY mode.
Specified value: 5 gf•cm or higher.
4)
Check the FWD back tension as follows.
• Check the FWD back tension by measuring the torque of
• Check the FWD back tension by measuring the torque of
the S reel side.
Specified value: 7.5 to 9.5 gf•cm
Specified value: 7.5 to 9.5 gf•cm
• Adjustment procedure
If the value of the FWD back tension does not satisfy the
specifications, change the position where the TG1 arm spring
is hooked.
If the value is larger than the specifications:
Change the spring hook position in the direction of the arrow
A
specifications, change the position where the TG1 arm spring
is hooked.
If the value is larger than the specifications:
Change the spring hook position in the direction of the arrow
A
.
If the value is smaller than the specifications:
Change the spring hook position in the direction of the arrow
B
Change the spring hook position in the direction of the arrow
B
.
Fig. 5-2
BT band
assembly
assembly
RVS arm
spring
spring
TG1 arm
spring
spring
TG1 arm
Reel table
(T) assembly
(T) assembly
A
B
5)
Enter the RVS mode.
6)
Check the RVS torque as follows.
• Check the RVS torque of the S reel side in the RVS mode.
• Check the RVS torque of the S reel side in the RVS mode.
Specified value: 17 to 35 gf•cm
7)
Check the RVS brake torque as follows.
• Check the RVS brake torque by measuring the torque of the
• Check the RVS brake torque by measuring the torque of the
T reel side.
Specified value: 8 to 16 gf•cm
Specified value: 8 to 16 gf•cm
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