1-7
HDW-750/750CE V1
1
Temperature sensor
Detects temperature and drives the fan.
2
Cassette-in sensor
Detects whether a cassette is inserted or not.
3
REC INHIBIT sensor
Detects REC INHIBIT plug of a cassette tape.
4
Tape end sensor
Detects the tape end of a tape that is running in the FWD direction.
5
Full top sensor
Detects whether the inserted cassette tape is in the full top position or not.
6
Humid sensor
Detects the dew condensation inside the unit.
7
Tape top sensor
Detects the tape end of a tape that is running in the REV direction.
8
Function cam sensor
Detects the rotary position of the function cam.
9
T-reel table assembly rotation sensor
Detects rotation of the take-up reel table with the use of the T-reel table assembly rotation sensor. The
FG generator output of this sensor is input to the servo circuit where diameter of the remaining tape is
calculated.
0
Cassette lock sensor (switch)
Detects whether the cassette compartment assembly is locked or not.
!-
Cassette ID sensor
ID1 :
Tape type
Detects the tape type (Oxide or Metal).
ID2 :
Tape thickness
Detects thickness of the tape that is wound in the cassette tape inserted in the set, with the
use of the tab on the rear of a cassette tape.
ID3 :
Reel hub diameter
The reel hub diameter of a cassette tape is different depending on the length of a tape that
is wound in the cassette tape. The reel hub diameter sensor detects the reel hub diameter
with the use of a tab on the rear of a cassette tape.
ID4 to 6 : Tape format
Detects whether a cassette conforms to the HDCAM format or not.
!=
S-reel table assembly rotation sensor
Detects rotation of the supply reel table with the use of the S-reel table assembly rotation sensor. The
output of this sensor is input to the servo circuit where diameter of the remaining tape is calculated.
1-1. Locations of Main Parts and Circuit Configuration