Epson PX-8 Technical Manual page 232

REV.-A
5.4.2
Repairing The LCD Unit
Before repairing the LCD unit, check the following:
1) Check the LCD panel surface for damage.
2) Check for any shade on the LCD panel when power is off.
3) Check the LCD board for any damage.
If a defect is found during the above checks, the LCD unit cannot be repaired. Replace the unit.
*
When replacing a flat-package IC, follow the procedure below.
(1) Remove the solder from the IC terminal leads with a Solderwick.
(2) Lightly push the IC up with a precision screw driver.
(Do not force the IC; otherwise, the printed
board and the repair may become impossible).
circuit pattern may come off the
(3) Remove the IC and remove the reamining solder from the pattern with the solder-
wick.
(4) Bend the new IC terminal leads so that they fit to the pattern holes.
(The terminal leads are bent downward when the IC is mounted on the head of the
board and upward when mounted on the tail.)
(5) Resolder the new IC terminal leads.
(6) Remove the flux from the soldered area.
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