Toshiba SD-V395 Service Manual - Page 45

Removal And Installation Of Flat, Package Ic, Removal, Refer To Fig. 4-1.

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DISASSEMBLY INSTRUCTIONS 4. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC REMOVAL 1. Put the Masking Tape (cotton tape) around the Flat Package IC to protect other parts from any damage. (Refer to Fig. 4-1.) NOTE Masking is carried out on all the parts located within 10 mm distance from IC leads. IC Masking Tape (Cotton Tape) 3. When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 4-3.) NOTE Some ICs on the PCB are affixed with glue, so be careful not to break or damage the foil of each IC leads or solder lands under the IC when removing it. Blower type IC desoldering machine Fig. 4-1 2. Heat the IC leads using a blower type IC desoldering machine. (Refer to Fig. 4-2.) NOTE Do not add the rotating and the back and forth directions force on the IC, until IC can move back and forth easily after desoldering the IC leads completely. Blower type IC desoldering machine Tweezers IC Fig. 4-3 4. Peel off the Masking Tape. 5. Absorb the solder left on the pattern using the Braided Shield Wire. (Refer to Fig. 4-4.) NOTE Do not move the Braided Shield Wire in the vertical direction towards the IC pattern. Braided Shield Wire Soldering Iron IC Fig. 4-2 IC pattern Fig. 4-4 B4-1

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DISASSEMBLY INSTRUCTIONS
B4-1
4. REMOVAL AND INSTALLATION OF FLAT
PACKAGE IC
REMOVAL
1.
Put the Masking Tape (cotton tape) around the Flat
Package IC to protect other parts from any damage.
(Refer to Fig. 4-1.)
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
Fig. 4-1
Masking Tape
(Cotton Tape)
IC
2.
Heat the IC leads using a blower type IC desoldering
machine.
(Refer to Fig. 4-2.)
NOTE
Do not add the rotating and the back and forth direc-
tions force on the IC, until IC can move back and forth
easily after desoldering the IC leads completely.
Fig. 4-2
Blower type IC
desoldering machine
IC
3.
When IC starts moving back and forth easily after
desoldering completely, pickup the corner of the IC using
a tweezers and remove the IC by moving with the IC
desoldering machine.
(Refer to Fig. 4-3.)
NOTE
Some ICs on the PCB are affixed with glue, so be
careful not to break or damage the foil of each IC
leads or solder lands under the IC when removing it.
Fig. 4-3
Blower type IC
desoldering machine
Tweezers
IC
4.
5.
Peel off the Masking Tape.
Absorb the solder left on the pattern using the Braided
Shield Wire.
(Refer to Fig. 4-4.)
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Fig. 4-4
Braided Shield Wire
Soldering Iron
IC pattern