Sony SAL20F28 Service Manual ▷ View online
SAL20F28 (2.8/20) (20mm F2.8)
1-4
1-5-2. Focus Trouble
Check the operation
again.
Replace the defective part
or apply the grease.
OK
NG
OK
OK
OK
OK
Function NG
Position NG
Focus trouble
Replace the defective part
or apply the grease.
Check the coupler.
Check the outer barrel
and focus ring.
NG
NG
NG
NG
NG
END
OK
Check the installation of
the main flexible unit.
reinstall the main
flexible unit.
Check pattern
of the main flexible unit.
Clean the pattern of the
main flexible unit.
Replace the
main flexible unit.
Check the foecusing
operation again.
2-1
SAL20F28 (2.8/20) (20mm F2.8)
Cut and remove the part of gilt
which comes off at the point.
(Be careful or some
pieces of gilt may be left inside)
which comes off at the point.
(Be careful or some
pieces of gilt may be left inside)
2. DISASSEMBLY
NOTE FOR REPAIR
• Make sure that the flat cable and flexible board are not cracked of bent at the terminal.
Do not insert the cable insufficiently nor crookedly.
• When remove a connector, dont’ pull at wire of connector. It is possible that a wire is snapped.
• When installing a connector, dont’ press down at wire of connector.
It is possible that a wire is snapped.
• Do not apply excessive load to the gilded flexible board.
UNIVERSAL WRENCH
In case of the following notches or holes are located in the lens block, etc during disassembling/
assembling the lens, Use the universal wrench.
assembling the lens, Use the universal wrench.
How to Use
Attach the chip-A or chip-B to the universal wrench.
For the notches: chip-A
For the holes:
For the notches: chip-A
For the holes:
chip-B
Match the universal wrench to the holes or notches of the lens block, etc.
Notches
Holes
Universal wrench
J-6082-609-A
J-6082-609-A
Chip-A for
universal wrench:
J-6082-609-1
universal wrench:
J-6082-609-1
Chip-B for
universal wrench:
J-6082-609-2
universal wrench:
J-6082-609-2
Notches
Chip-A
Chip-A
Chip-B
Chip-B
Chip
Chip
Match the universal wrench
to the width of holes or notches.
to the width of holes or notches.
Universal wrench
Holes
Ver 1.1 2007.01
2-2
SAL20F28 (2.8/20) (20mm F2.8)
2-1.
DISASSEMBLY
2-1-1. FOCUS RING, FRONT LENS BARREL AND FIXED TUBE
EXPLODED VIEW
Note:
Remove the decoration ring using the name
ring
ring
wrench C (72 mm).
Name ring wrench C (72 mm)
:
J-6082-634-A
Name ring wrench C (72 mm)
HELP01
HELP13
3
Front Lens
Barrel
4
2nd Lens
Block
Block
X
T
HELP02
5
Focus
Ring
HELP03
(See Page 2-3.)
X
T
R
U
Z
Y
Z
R
U
Y
2
1st Lens
Block
1
Decoration
Ring
6
Outer Barrel Hold
Plate
7
Outer Barrel
Ver 1.2 2007.05
2-3
SAL20F28 (2.8/20) (20mm F2.8)
2-1-2. REAR LIGHT SHIELD BARREL, LENS MOUNT BLOCK AND OUTSIDE BARREL
1
Lens Mount Riveting Block
HELP06
HELP14
EXPLODED VIEW
3
Rear Light Shield Barrel
HELP05
HELP04
HELP09
4
Main Flexible Unit
Lens Mount Block
HELP07
HELP08
5
Coupler
B
C
A
D
2
Main
Spring
(See Page 2-4.)
A
B
D
C
6
Outside
Barrel
FLANGE BACK
ADJUSTMENT
ADJUSTMENT
7
Back
Adjustment
Washer
Washer
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