Nikkor JAA79051, Руководство по ремонту

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JAA79051-R.3624.A
- L32 ･ AF-S DX18-70/3.5-4.5G -
ADJUSTMENT FOR MR DUTY
●
In case of replacing the main PCB, SWM unit or MR encoder unit, be sure to make this adjustment.
●
In case of replacing the main PCB, be sure to perform "READING AND REWRITING OF EEPROM DATA" then
"3.WRITING THE FIXED VALUES."
How to adjust:
①
Make sure that the current and voltage of the connected rated voltage power supply are the set values.
Then, turn on the rated voltage power supply for the contacts A and F.
②
Select "MR DUTY ADJUSTMENT" in the menu items of the AF-S 18-70/3.5-4.5G DX inspection program.
③
The display for checking whether the fixed values are written in EEPROM appears. Select a proper item.
④
According to the instructions on the screen, rotate the MF ring from the infinity to the near distance direction
slowly by hand. Make sure that the waveform on the oscilloscope has duty 50% then stop the MF ring at the near
distance end.
C H 1 = 5 V C H 2 = 5 V 5 m s / d i v
D C 1 0 : 1 D C 1 0 : 1
NORM 200KS/s
●Setting of oscilloscope
V/Div
（
CH1
） ：５Ｖ
V/Div
（
CH2
） ：５Ｖ
Coupling
：ＤＣ
Time/Div
：５
m Sec
Trigger Mode
：
NORMAL
Trigger Coupling
：ＤＣ
Trigger Source
：ＣＨ１
Trigger Position
：＋４
div
Trigger Type
：
EDGE
Trigger Level
：２． ５Ｖ
⑤
According to the instructions on the screen, rotate the MF ring from the near distance to the infinity direction
slowly by hand. Make sure that the waveform on the oscilloscope has duty 50% and then stop the MF ring at the
infinity end.
Note
：
If the waveform from infinity to near distance and vice versa does not have duty 50%, perform again
"INSPECTION AND ADJUSTMENT FOR THE WAVEFORM OUTPUT FROM MR ENCODER" in P.L17.
Ｈ
Ｌ
Standard
Ｈ：Ｌ＝
100
：
206
～
206
：
100
（
50
％
±17.3
％）
INC