Angle Adjustment Of Main Mirror And Sub-Mirror - Nikon VBA23001 Repair Manual

Angle adjustment of Main mirror and sub-mirror

※ Procedure: Follow the operating instructions of the tool for main/sub mirror angle-inspection (J19132).
・Main-mirror 45° adjustment
Caution: Before and after the adjustment, check the accuracy by moving the main mirror up- and downwards a few times.
① Check for the right-left deviation
In case the result is out of standard, loose the three screws (#1520), then make the adjustment by moving the eccentric
pin for right-left adjustment.
② Check for the up-down deviation.
In case the result is out of standard, make the adjustment by turning the eccentric pin for the main mirror.
・Sub-mirror 59° adjustment
Caution: Before and after the adjustment, check the accuracy by moving the main mirror up- and downwards a few
times. Confirm if the two-pronged part of the sub-mirror firmly fits in the eccentric pin.
* Check for the up-down deviation
In case the result is out of standard, make the adjustment by turning the sub-mirror eccentric pin.
Caution: Do NOT release the shutter.
Set the (supplied) tilted mirror with the main mirror being slightly lifted so that the sub-
mirror of D90 does not touch the (supplied) tilted mirror of the inspection tool.
△（Revision）
Screw (#670) ×4
BB545 attaching screw
B545止めﾋﾞｽ
BMain-mirror up/down
adjusting eccentric pin
Changed page △× 2
the four screws (#670) △（Revision）
① Mirror angle-inspection tool
BMain-mirror right/left
主ﾐﾗｰ左右
主ﾐﾗｰ上下
調整偏芯ﾋﾟﾝ
adjusting eccentric pin
調整偏芯ﾋﾟﾝ
- A23 ･ D90 -
INC
VBA23001-R.3762.A
BSub-mirror up/down
ｻﾌﾞﾐﾗｰ上下
調整偏芯ﾋﾟﾝ
adjusting eccentric pin
October. 2. 2008