Nikon VBA23001 Repair Manual page 94

・Turn the segment gear of the aperture control unit (#B241RP) in the direction of the arrow.
・Push in the latch lever and lock it.
・Confirm that the SQ lever is not hooked in the reset lever.
(If it is, turn the gear in the direction of the arrow so as to separate the SQ lever, and unhook it.) (If it is, turn the gear in the direction of the arrow so as to separate the SQ lever, and unhook it.) turn the gear in the direction of the arrow so as to separate the SQ lever, and unhook it.)
SQ lever
Reset lever
・Hook the shutter charge lever (#203) to the preview latch lever (#222). Hook the shutter charge lever (#203) to the preview latch lever (#222).
Preview latch lever (#222)
aperture control unit (#B241RP) in the direction of the arrow.
Aperture control unit (#B241RP)
Segment gear
Shutter charge lever (#203)
- A12 ･ D90 -
in the direction of the arrow.
Push in.
Latch lever
Grease: LEN317A
INC
VBA23001-R.3762.A