Sony SAL28F28 Service Manual page 7

1-5-2. Focus Trouble
NG
Replace the defective part
or apply the grease.
NG
SAL28F28 (2.8/28) (28mm F2.8)
Function NG
Check the coupler.
OK
OK
Check the outer barrel
and focusing ring.
NG
Replace the defective part
or apply the grease.
Check the operation
again.
OK
Focus trouble
Reinstall the main flexibl unit.
Clean the pattern of the
main flexible unit.
1-4
Position NG
NG
Check the installation
of the main flexibl unit.
OK
NG
Check the focusing
operation again.
OK
Replace the
main flexible unit.
Check the focusing
operation again.
OK
END
NG