Read Sony SAL135F28 Service Manual online
1-4
SAL135F28 (STF 2.8(T4.5)/135) (135mm F2.8 [T4.5] STF)
1-5-2. Focus Trouble
NG
OK
OK
OK
OK
NG
NG
NG
NG
OK
Check the operation
again.
Replace the defective part
or apply the grease.
Function NG
Position NG
Focus trouble
Check the distance
scale tube, focus ring,
fixed sleeve, and
2 group move
frame block.
END
Check pattern
of the main flexible unit.
Clean the pattern of the
main flexible unit.
Replace the
main flexible unit.
Check the position of
contact piece and
deformation of terminal
of brush
(for focus ring).
Adjust the position of contact
piece of brush (for focus ring),
or replacethe brush
(for focus ring).
Perform the focus
brush position
adjustment and
pattern check.
(See page 4-33.)
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