Sanyo VHR-1110 Series - Page 6

1-3-3. Review gear
This gear functions during the R-SSEARCH mode.
Because tape take-up during the R-SSEARCH mode is via the
drum, a stronger rotation (than for the F-SEARCH mode)
is necessary.
Detection
Main slide
(The rotation torque during the F-SSEARCH mode is 70
+15g-cm, and during the RSSEARCH mode is 200 +30g-cm.)
For this reason, the review gear is used to increase the
rotation torque of the main slip gear (pulley gear and drive
gear).
Main Slip Gear
ee ee
Review gear
Moving the main slide from PLAY mode © to R-SEARCH mode@®.
Fig. 1-3-3
1-3-4, Capstan “soft’”’ braking by solenoid
(Fig. 1-3-4 VHR-2500 series only)
The “soft” braking is switched ON during the SLOW mode
and the STILL mode.
The capstan motor operates under intermittent drive
conditions during the SLOW mode and the STILL mode. In
order to stabilized the intermittent drive of the capstan
motor, a solenoid is used to apply braking to the capstan
motor.
Capstan Motor
Capstan soft brake
Solenoid
The voltage applied from the system-control circuitry to
both terminals of the solenoid during the SLOW mode and
the STILL mode is 13V.
1-3-5. Loading brake (Fig. 1-3-5)
In order to eliminate tape loosening or slack during the
loading operation, braking is applied to the supply reel base
side during loading.
When the loading operation is finished, the loading brake is
released.
Ue
j ifn gy
Nn Pde
Loading brake
Supply reel base
5
E
:
O
Idler stopper