NIKON ED 18-70MM F-3.5-4.5G IF
Manual de Servicio

INC
JAA79051-R.3624.A
�� In the case of small amplitude, make an adjustment by loosen 2 screws #541 to shift the MR head position as shown right. Note� During adjustment, prevent the magnetic tape and MR head from touching the magnetized driver bit, or the magnetic data may be damaged. � �Reference� �� In case the amplitude of either CH1 or CH2 is smaller, one of 2 screws #541 may be loosened, so check for it. But if this is not the case, the MR head is regarded as malfunctioning. Be sure to replace the MR head unit (B15) and adjust it again.
CH1=20mV AC 10:1 CH2=20mV AC 10:1 5ms/div NORM 200KS/s

MR head

� 541 � 2 Magnetic tape

CH1

CH2

�� In case there is a partial drop in the amplitude between the infinity and the near distance, the magnetic data of magnetic tape may be damaged. Then, replace the magnetic tape and adjust it again.

CH1=20mV AC 10:1

CH2=20mV AC 10:1

5ms/div NORM 200KS/s

CH1

CH2

�� Turn off the rated voltage power supply and remove the SWM unit.

- L20 ï½¥ AF-S DX18-70/3.5-4.5G -