Sony BETACAM SX DNV-5 Maintenance Manual page 13

1 : Cassette-in sensor
This sensor detects the existence of a cassette.
2 : REC inhibit sensor
This sensor detects the REC inhibiting plug of the cassette tape.
3 : Tape end sensor
This sensor detects the end of the tape that runs in the forward direction.
4 : Full top sensor
This sensor detects whether the cassette tape is the full top.
5 : Condensation sensor
This sensor detects whether the dew condensation occurs in the unit.
6 : Tape top sensor
This sensor detects the end of the tape that runs in the reverse direction.
7 : Function cam sensor
This sensor detects the rotation position of a cam.
8 : Take-up reel table rotating sensor
This sensor detects the rotation of the take-up reel table. The FG output signal of this sensor is
input to a servo circuit so as to calculate the winding diameter of the tape.
9 : Cassette lock sensor (switch)
This sensor detects that the cassette compartment was locked.
0 : Cassette ID sensors
ID1 : Tape type sensor
This sensor detects the tape type either an oxide or a metal.
ID2 : Tape thickness sensor
Using a tub on the back side of the cassette tape, this sensor detects the thickness of the tape
wound on a cassette tape that is being inserted into the unit.
ID3 : Reel hub diameter sensor
The reel hub diameter of a cassette tape varies depending on the length of the tape wound
on the cassette tape. The reel hub diameter sensor detects the reel hub diameter by the tab
on the back side of the cassette tape.
ID4 to ID6 : Tape format sensors
These sensors detect the type of the cassette tape (for Betacam SX, Betacam SP and
so on).
!- : Supply reel table rotating sensor
This sensor detects the rotation of the supply reel table. The FG output signal of this sensor is
input to a servo circuit so as to calculate the winding diameter of the tape.
DNV-5
1-3. Location of Main Parts and Function of Printed Circuit Boards
1-3-3. Location and Function of Sensors
1-7