Sony GY-8240UWD Maintenance Manual page 18

1-3. Main Parts Layout
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 top of the tape, and in addition
detects the tape end of the tape that runs in the rewind
direction.
7 Cassette ID-1 sensor
8 Cassette ID-2 sensor
9 Cassette ID-3 sensor
!/ Cassette ID-4 sensor
!- Cassette ID-5 sensor
!= Cassette ID-6 sensor
When the cassette is inserted into the unit, this sensor
distinguishs the type of the cassette.
![ L Cassette REC INHIBIT sensor
This is a REC inhibit plug detector switch for the large
cassette.
1-8
!] 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 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.
!' S tension regulator arm sensor
During recording and playback, this sensor detects the
tension arm position and controls the reel torque to
keep a constant tape tension.
!, Tape end sensor
This sensor detects the end of the tape that runs in the
forward direction.
!. Cassette-in sensor (L)
This sensor detects whether a cassette is being inserted.
@/ Cassette L/S size sensor
This sensor detects whether the inserted cassette tape
is an L size or S size.
@- Cassette-in sensor (R)
This sensor detects whether a cassette is being inserted.
@= 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-lid sensor
This sensor detects the cassette-lid position (open/
closed), by which it is confirmed whether a cassette is
in the cassette insert opening or not.
GY-8240UWD
GY-8240FC