Toshiba MW27F51 Service Manual - Page 35

INSTALLATION, Refer to Fig. 5-5., Refer to Fig. 5-6., Refer to Fig. 5-7., Refer to Fig. 5-8.

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DISASSEMBLY INSTRUCTIONS INSTALLATION 1. Take care of the polarity of new IC and then install the new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily. (Refer to Fig. 5-5.) 4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 5-8.) IC Thin-tip Soldering Iron Soldering Iron Solder temporarily Solder temporarily Fig. 5-5 2. Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads. (Refer to Fig. 5-6.) Fig. 5-8 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. NOTE When the IC leads are bent during soldering and/or repairing, do not repair the bending of leads. If the bending of leads are repaired, the pattern may be damaged. So, always be sure to replace the IC in this case. Solder Soldering Iron IC Supply soldering from upper position to lower position Fig. 5-6 3. Absorb the solder left on the lead using the Braided Shield Wire. (Refer to Fig. 5-7.) NOTE Do not absorb the solder to excess. Soldering Iron IC Braided Shield Wire Fig. 5-7 B5-2

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DISASSEMBLY INSTRUCTIONS
B5-2
Fig. 5-5
INSTALLATION
1.
Take care of the polarity of new IC and then install the
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 5-5.)
Soldering Iron
Solder temporarily
Solder temporarily
2.
Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
(Refer to Fig. 5-6.)
Fig. 5-6
Solder
IC
Soldering Iron
Supply soldering
from upper position
to lower position
3.
Absorb the solder left on the lead using the Braided
Shield Wire.
(Refer to Fig. 5-7.)
NOTE
Do not absorb the solder to excess.
Fig. 5-7
Soldering Iron
IC
Braided Shield Wire
4.
When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thin-
tip Soldering Iron.
(Refer to Fig. 5-8.)
Fig. 5-8
Thin-tip Soldering Iron
IC
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.
NOTE
When the IC leads are bent during soldering and/or
repairing, do not repair the bending of leads. If the
bending of leads are repaired, the pattern may be
damaged. So, always be sure to replace the IC in this
case.