Sharp LC-22DV200E Service Manual ▷ View online
2.4: SPRING SHUTTER/PLATE RETAINER/
RETAINER SHUTTER/COVER CLAMPER/
PLATE CLAMPER/MAGNET CLAMPER/
CLAMPER/GUIDE DISC/LEVER DISC/
SPRING LEVER GUIDE/SPRING LEVER DISC/
LEVER DISC (Refer to Fig. 2-4-A)
1. Unlock the support (1).
2. Remove the Retainer Shutter Ass'y.
3. Remove the Spring Shutter.
4. Remove the 3 screws (2).
5. Remove the Plate Retainer.
6. Remove the Retainer Shutter.
7. Unlock the 2 supports (3).
8. Remove the Cover Clamper.
9. Unlock the 3 supports (4).
10. Remove the Plate Clamper.
2. Remove the Retainer Shutter Ass'y.
3. Remove the Spring Shutter.
4. Remove the 3 screws (2).
5. Remove the Plate Retainer.
6. Remove the Retainer Shutter.
7. Unlock the 2 supports (3).
8. Remove the Cover Clamper.
9. Unlock the 3 supports (4).
10. Remove the Plate Clamper.
(OK) (NG)
11. Remove the Magnet Clamper.
12. Remove the Clamper.
13. Unlock the support (5).
14. Remove the Guide Disc.
15. Remove the Lever Guide.
12. Remove the Clamper.
13. Unlock the support (5).
14. Remove the Guide Disc.
15. Remove the Lever Guide.
16. Remove the Spring Lever Guide.
17. Remove the Spring Lever Disc.
18. Remove the Lever Disc.
17. Remove the Spring Lever Disc.
18. Remove the Lever Disc.
DISASSEMBLY INSTRUCTIONS
Spring Shutter (2pcs)
Clamper Ass'y
Fig. 2-4-B
Check Hook
Frame Main Ass'y
Retainer Shutter
B2-4
2-5: FFC WIRE HANDLING
1. When installing the FFC, fold it correctly and install it as
shown from Fig. 2-5-A to Fig. 2-5-D.
NOTE
1. Do not make the folding lines except the specified
positions for the FFC.
• Screw Torque: 0.7 ± 0.3kgf•cm (Screw (2))
NOTE
35 ± 1mm
1. In case of the Retainer Shutter Ass'y installation,
check if the value of the Fig. 2-4-B is correct.
Fold
2. In case of the Clamper Ass'y installation,
check if the value of the Fig. 2-4-C is correct.
[ 24 pin FFC ]
Guide Disc
Frame Mian
Spring Lever Disc
(5)
(2)
Lever Disc
Lever Guide
Spring Lever Guide
Cover Clamper
Plate Clamper
Magnet Clamper
Clamper
(2)
(2)
Retainer Shutter
Spring Shutter
Fig. 2-4-A
Fig. 2-4-C
Fig. 2-5-A
Printing Surface
Plate Retainer
(1)
(3)
(4)
Check Hook
B2-4
71 ± 1mm
Fold it by 90°
DISASSEMBLY INSTRUCTIONS
Install the position (A) and (B)
[ 4 pin FFC ]
[ 5 pin FFC ]
Fig. 2-5-B
(A)
(B)
Fig. 2-5-C
Printing Surface
B2-5
25 ± 1mm Fold it by 90°
Fold it by 90° 15 ± 1mm
16 ± 1mm
10 ± 1mm
Fig. 2-5-D
Printing Surface
B2-5
3. REMOVAL AND INSTALLATION OF
3. When IC starts moving back and forth easily after
FLAT PACKAGE IC
desoldering completely, pickup the corner of the IC using
tweezers and remove the IC by moving with the IC
tweezers and remove the IC by moving with the IC
REMOVAL
desoldering machine. (Refer to Fig. 3-3.)
1. Put Masking Tape (cotton tape) around the Flat Package
NOTE
IC to protect other parts from any damage.
(Refer to Fig. 3-1.)
(Refer to Fig. 3-1.)
Some ICs on the PCB are affixed with glue, so be
careful not to break or damage the foil of each IC
careful not to break or damage the foil of each IC
NOTE
leads or solder lands under the IC when removing it.
Masking is carried out on all the parts located within
10 mm distance from IC leads.
10 mm distance from IC leads.
DISASSEMBLY INSTRUCTIONS
Fig. 3-1
Masking Tape
(Cotton Tape)
IC
Blower type IC
desoldering machine
Tweezers
B3-1
2. Heat the IC leads using a blower type IC desoldering
machine. (Refer to Fig. 3-2.)
NOTE
Do not rotate or move the IC back and forth , until IC
4. Peel off the Masking Tape.
can move back and forth easily after desoldering the
leads completely.
leads completely.
5. Absorb the solder left on the pattern using the Braided
Shield Wire. (Refer to Fig. 3-4.)
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
direction towards the IC pattern.
Blower type IC
desoldering machine
IC
Fig. 3-2
IC
Fig. 3-3
Fig. 3-4
IC pattern
Braided Shield Wire
Soldering Iron
B3-1
INSTALLATION
4. When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thin-
1. Take care of the polarity of new IC and then install the
tip Soldering Iron. (Refer to Fig. 3-8.)
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 3-5.)
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 3-5.)
5. Finally, confirm the soldering status on four sides of the
IC using a magnifying glass.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
NOTE
When the IC leads are bent during soldering and/or
2. Supply the solder from the upper position of IC leads
repairing, do not repair the bending of leads. If the
sliding to the lower position of the IC leads.
bending of leads are repaired, the pattern may be
(Refer to Fig. 3-6.)
damaged. So, always be sure to replace the IC in this
case.
case.
DISASSEMBLY INSTRUCTIONS
Soldering Iron
Solder temporarily
Solder temporarily
Fig. 3-5
IC
Thin-tip Soldering Iron
Fig. 3-8
B3-2
3. Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 3-7.)
NOTE
Do not absorb the solder to excess.
IC
Soldering Iron
Supply soldering
from upper position
to lower position
from upper position
to lower position
Solder
Fig. 3-6
Soldering Iron
IC
Braided Shield Wire
Fig. 3-7
B3-2
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