Sharp LC-23LE448RU, Service Manual

Page: 13 / 38

INSTALLATION 4. When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a
1. Take care of the polarity of new IC and then install the Thintip Soldering Iron. (Refer to Fig. 2-8.)
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 2-5.)
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.
NOTE
2. Supply the solder from the upper position of IC leads When the IC leads are bent during soldering and/or
sliding to the lower position of the IC leads. repairing, do not repair the bending of leads. If the
(Refer to Fig. 2-6.) bending of leads are repaired, the pattern may be
damaged. So, always be sure to replace the IC in this
Fig. 2-5
Fig. 2-8
IC
Thin-tip Soldering Iron
Soldering Iron
Solder temporarily
Solder temporarily
damaged. So, always be sure to replace the IC in this
case.
3. Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 2-7.)
NOTE
Do not absorb the solder to excess.
Fig. 2-6
Fig. 2-7
IC
Soldering Iron
Supply soldering
from upper position
to lower position
Solder
Soldering Iron
IC
Braided Shield Wire
B2-2
DISASSEMBLY INSTRUCTIONS (continued)