![Sony GY-2120WD Maintenance Manual Download Page 17](http://html.mh-extra.com/html/sony/gy-2120wd/gy-2120wd_maintenance-manual_410991017.webp)
1-7
GY-2120WD/WS
!]
S reel table rotation sensor
This sensor datects the rotation of the supply reel table.
The FG output signal of this sensor is input to the
servo circuit to control the rotation speed of the reel
motor.
!\
Reel L/S position sensor
This sensor detects whether the reel table moves to the
correct position according to the size of the inserted
cassette tape.
!;
S cassette REC INHIBIT sensor
This is a REC inhibit plug detection switch for the
small cassette.
!'
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
The cassette-down (1) sensor detects the movement of
the cassette compartment through combined ON/OFF
operation of the cassette-down (2) sensor, the cassette-
down (1) sensor, and a cassette-in sensor.
1-2. Main Parts Layout
1
Threading motor rotation sensor
The threading motor rotation sensor detects the
rotation speed of the threading motor.
The FG output signal of this detection sensor is input
to the servo circuit to control the threading speed so
that the tape is not damaged during threading and
unthreading.
2
Threading-end/unthreading-end sensor
This sensor detects whether the threading ring reaches
the threading-end or unthreading-end position.
3
T tension regulator arm sensor
During recording and playback, this sensor detects the
tension arm position and controls the reel torque to
keep a constant T tape tension.
4
Condensation sensor
This sensor detects whether the dew condensation
occurs in the unit.
5
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.
6
Cassette ID-1 sensor
7
Cassette ID-2 sensor
8
Cassette ID-3 sensor
9
Cassette ID-4 sensor
0
Cassette ID-5 sensor
!-
Cassette ID-6 sensor
When the tape is inserted into the unit, this sensor
distinguishs the type of the cassette tape.
!=
L Cassette REC INHIBIT sensor
This is a REC inhibit plug detector switch for the large
cassette.
![
T reel table rotation sensor
This sensor detects the rotation of the take-up reel
table. The FG output signal of this sensor is input to
the servo circuit to control the rotation speed of the
reel motor.
Summary of Contents for GY-2120WD
Page 10: ......
Page 224: ......
Page 437: ...7 3 GY 2120WD WS Index Mechanical Deck Overall Block 6 7 9 8 2 1 3 4 5 ...
Page 469: ...8 1 GY 2120WD WS 8 1 Section 8 Block Diagrams Frame Wiring ...
Page 476: ......
Page 482: ......