JAA79201-R.3669.A
- Ａ6･ AF-S 18-55/3.5-5.6G -
● Oscilloscope setting
V/Div (ch1)
: 50 mV
V/Div (ch2)
: 50 mV
Coupling
: AC
Time/Div
: 5 m Sec
Trigger Mode
: NORMAL
Trigger Coupling
: AC
・
How to inspect and adjust:
①
Confirm that the electric current and voltage of the connected rated voltage power-supply are set values, then
turn it ON.
②
Set the oscilloscope. While holding the white gear of the SWM unit with tweezers, etc, up towards the
bayonet side, turn the focus ring manually.
Note
:
The waveform varies according to the rotational speed of the focus ring. So change "Time/Div” setting
accordingly.
③
In case large waveform-noise (as shown in Fig. 1) is detected, use the FILTER function.
How to set FILTER function (e.g. DL1540 manufactured by YOKOGAWA
）
1. Press the FILTER button.
2. Select “Smooth” of the menu on screen and turn it ON.
Amplitude
CH1
CH2
Fig.1
⑥
In case the amplitude is small, disassemble up to the
stage of the zoom ring. Then if the deformation is
detected in the MR head, correct the deform of the
MR head. On the other hand, if such correction is
impossible or no deformation is detected, replace the
MR unit. (Fig.2)
Note: When adjustments are made, prevent the
magnetic surface and MR head from touching the
magnetized driver bit. Otherwise, the magnetic
data may be damaged.
MR head
Magnetic
surface
#79×2
Fig.2
Standard:
Amplitude of all pulses/
waveforms is 80mV or more.
Note:
Check the waveform by moving the
focus ring back and forth from the
infinity-end to the close-end positions
entirely.
