Nikkor JAA79051, Руководство по ремонту

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JAA79051-R.3624.A
- L20 ･ AF-S DX18-70/3.5-4.5G -
④
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.
●
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.
《
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.
⑦
Turn off the rated voltage power supply and remove the SWM unit.
＃ 541 × 2
MR head
Magnetic tape
C H 1 = 2 0 m V C H 2 = 2 0 m V 5 m s / d i v
A C 1 0 : 1 A C 1 0 : 1
NORM 200KS/s
C H 1 = 2 0 m V C H 2 = 2 0 m V 5 m s / d i v
A C 1 0 : 1 A C 1 0 : 1
NORM 200KS/s
CH1
CH2
CH1
CH2
INC