Sony GY-2120WD Maintenance Manual page 209

Check
4. Turn the Power On
5. Play Back the Alignment Tape
Play back the YR2-1 alignment tape (IDR: 0 to
72000). (FWD mode)
6. Check the CTL/TC Head Height
(1) Check that the level decreases when portion
A of the tape shown in the figure is pressed
down.
If the level increases, perform step 7.
(2) Check that the level decreases when portion
B of the tape is pushed up.
If the level increases, perform step 7.
GY-2120WD/WS
* Alignment tape: YR2-1
<CTL Output waveform>
Spec. : The level decreases when pressing down
and pushing up the alignment tape.
CTL/TC Head Height Check
5-5. CTL/TC Head Height Adjustment
TG-4
A
B
CTL/TC head
A
A > 5 V p-p
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