Sony SRW-5000 Maintenance Manual page 31

1 Threading motor FG sensor
This sensor detects the rotation speed of the threading
motor. The output signal of this sensor enters the
threading motor servo circuit, and controls the thread-
ing/unthreading speed to protect the tape during
threading and unthreading operation.
2 Unthreading-end sensor
3 Threading-end sensor
These sensors detect whether the threading ring
reaches the threading-end or unthreading-end position.
4 T tension regulator arm sensor
This sensor detects the position of a T tension regula-
tor arm. During recording and playback, the output
signal of this sensor enters the T reel motor servo
circuit, and controls the reel torque to keep a constant
T tape tension.
5 Condensation sensor
This sensor detects whether the dew condensation
occurs in the unit.
6 Tape top sensor
This sensor detects the beginning of the tape, and in
addition detects the end of the tape that runs in the
reverse direction.
7 Reel hub diameter sensor
This sensor detects the reel hub diameter detection tab
of a cassette.
The reel hub with two types of diameters (thin and
thick) is available according to the length of a tape
stored in a cassette. This sensor is used to discriminate
the diameter. The output signal of this sensor enters
the servo circuit of take-up and supply reel motors, and
controls the reel rotation speed and torque during tape
transport.
8 Metal/oxide tape sensor
Not used.
9 HDCAM SR cassette detection sensor
When the cassette classification sensor detected the
HDCAM SR or MPEG IMX cassette, this sensor is
used to discriminate whether it is the HDCAM SR
cassette.
SRW-5000/5500
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!/!-!= Cassette classification sensors
These sensors detect the three cassette type detection
tabs of a cassette.
These sensors are used to discriminate whether a
cassette can be used in this unit.
![ L cassette REC inhibit sensor
This sensor (switch) detects the condition of a REC
inhibit plug for the MPEG IMX/Betacam SX large
cassette.
!] Reel S position sensor
!\ Reel L position sensor
These sensors detect whether the reel table moves to
the correct position according to the size of the
inserted cassette.
!; S cassette REC inhibit sensor
This sensor (switch) detects the condition of a REC
inhibit plug for the small cassette.
!' S tension regulator arm sensor
This sensor detects the position of an S tension
regulator arm. During recording and playback, the
output signal of this sensor enters the S reel motor
servo circuit, and controls the reel torque to keep a
constant S tape tension.
!, Tape end sensor
This sensor detects the end of the tape that runs in the
forward direction.
!. Cassette-down (2) sensor
@/ Cassette-down (1) sensor
These sensors detect the movement (position) of a
cassette compartment by the combination of the
detection state of the two sensors and a cassette-in
sensor.
@- Cassette-in sensor (R)
This sensor detects whether a cassette is being insert-
ed.
@= Cassette size sensor
This sensor detects whether the inserted cassette is L
size or S size.
@[ Cassette-in sensor (L)
This sensor detects whether a cassette is being inserted.
*: Also refer to "1-10. System of Cassettes".
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