Angle Adjustment Of Main Mirror And Sub-Mirror - Nikon D70 VBA10401 Repair Manual

Angle adjustment of Main mirror and sub-mirror

*Tools required:
1.Main mirror 45°Inspection and Adjustment
① Collimator (J19002)
② Reflection mirror (J18362）
③ Optical parallel (J18037）
④ Hexagonal wrench
J18037
J18362
* Standard:
Main mirror
Left-right
±30' or less
deviation
Up-down
±10'
deviation
8'or less
Distortion
* Note:
・ Before and after the adjustment, check the accuracy by moving the main mirror up- and downwards a few
times.
・ Check for the up-down deviation. In case the deviation is out of standard, make an adjustment by turning the
eccentric pin for the sub-mirror with Hexagonal wrench.
・ In case the deviations of up-down and left-right are out of standard, the front plate unit or mirror unit is
regarded as malfunctioning.
・ In case check or adjust only front body, check again after attach the front body to the rear body.
Collimator
Bayonet
Eccentric pin for
the main mirror
Main mirror
Sub-mirror
＿＿
+15' ～ -50'
8'or less
- Ａ13 ･
2. Sub-mirror 47.75° Inspection and Adjustment
① Collimator (J19002)
② Sub-Mirror 45 deg. inspection tool
（J18324）
③ Hexagonal wrench
J18324
Eccentric pin
for the sub-
mirror
Up-down
Reference
line
-
VBA10401-R.3623.A
Collimator
Bayonet
Sub-mirror
Width of line indicates
deviation.
Left-right