Adjustment Of Driving Frequency And Motor Control - Nikon AF-S VR Nikkor ED 300mm f/2.8G IF Repair Manual

Adjustment of Driving frequency and Motor control

● In case of replacing the main PCB, SWM unit and MR encoder unit, be sure to make adjustments.
① The method of connection of the rated voltage power supply and measuring tools is the same as
"ADJUSTMENT OF MR DUTY".
② Make sure that the electric current and voltage of the rated voltage power supply are set to the set values
on the PC screen.
③ Turn the rated voltage power supply ON.
④ Select "2. ADJUSTMENT FOR DRIVING FREQUENCY & MOTOR CONTROL" in the menu of the
AF-S VR300 inspection program. The lens automatically starts the driving of scanning.
⑤ When the above Fig.1 is displayed, if the motor driving stops between the infinity and the end (exceeding
the infinity), select "Yes" then go to the next "Focus preset adjustment".
In case the motor does not stop driving, select "No" to make adjustments again.
In case the motor does not stop driving even after the readjustments, adjust the MR duty again and repeat
"ADJUSTMENT FOR DRIVING FREQUENCY & MOTOR CONTROL".
If the adjustment is not successful in spite of the above, the SWM unit, fix-tube unit, or MR head unit
may be defective.
⑥ When the above "Fig.1" is displayed in "Focus preset adjustment", select "Yes " to complete the
adjustment.
In case the motor does not stop driving, select "No " to make adjustments again.
In case the motor does not stop driving even after the readjustments, adjust the MR duty again and repeat
"ADJUSTMENT FOR DRIVING FREQUENCY & MOTOR CONTROL".
If the adjustment is not successful in spite of the above, the SWM unit, fix-tube unit, or MR head unit
may be defective.
Fig.1
- A40・AF-S VR300/2.8G -
JAA33751-R.3646.A