The example shown here is of Sharp LCD LC-46/60LE925E. The procedure to replace the touch sensor is
similar to most of other brand LCD TVs.
How to replace the Touch Sensor key PWB
Replace the touch sensor key PWB in a clean room. Be sure to remove the dust from the unit before carrying it into the clean room.
Remove the touch sensor key PWB from the front glass.
Clean the bonding surface with alcohol. Depending on the dirt, water solution of 80%vol can be effective.
Product Manual Touch Sensor Key with ITO (Transparent Electrode).
Replace the touch sensor key PWB in a clean room. Be sure to remove the dust from the unit before carrying it into the clean room.
Remove the touch sensor key PWB from the front glass.
Clean the bonding surface with alcohol. Depending on the dirt, water solution of 80%vol can be effective.
Product Manual Touch Sensor Key with ITO (Transparent Electrode).
When peeling the ITO section, check that there is no glue
residue on the front glass. If glue residue,
dirt, fingerprints, etc. are found, wipe them off with anhydrous alcohol. Do not apply anhydrous alcohol to the
double-sided tape on the metal part attaching to the glass.
Adhere the ITO section to the front
glass. (Use the positioning jig.) Tape fixing the
FPCB and ITO sections (Adhered by the supplier)
Peel the release paper of the double-sided tape on the ITO
section.
Slowly adhere it from the end using a roller. (Position the touch sensor using the jig.)
Check that there are no bubbles in the ITO section after adhered. Adhering error: +/-(1.0)mm.
Slowly adhere it from the end using a roller. (Position the touch sensor using the jig.)
Check that there are no bubbles in the ITO section after adhered. Adhering error: +/-(1.0)mm.
Adhere the FPCB section to the front
glass.
Lift the FPCB section to peel the release paper of the
double-sided tape. Be careful not to
apply stress to the joint of FPCB and ITO.
Adhere the FPCB section to the front glass. Be careful not to apply stress to the joint of FPCB and ITO.
Peel the tape fixing the FPCB and ITO sections.
Adhere the FPCB section to the front glass. Be careful not to apply stress to the joint of FPCB and ITO.
Peel the tape fixing the FPCB and ITO sections.
Attach the touch unit bonding
procedure.
It includes peeling of the protective sheet.
How to mount the touch sensor
Adhere after positioned using the positioning jig.
Peel the protective sheet by means of the pull tap for peeling the protective sheet.
Adhere the FPCB to the glass. (Do not warp the FPCB if possible.)
It includes peeling of the protective sheet.
How to mount the touch sensor
Adhere after positioned using the positioning jig.
Peel the protective sheet by means of the pull tap for peeling the protective sheet.
Adhere the FPCB to the glass. (Do not warp the FPCB if possible.)
Pull tap for peeling the protective sheet of the double-sided
tape in the FPCB section.
Peel the protective sheet of the OCA.
Lift the ITO section, then peel the protective sheet by about half by means of the pull tap.
Lift the ITO section, then peel the protective sheet by about half by means of the pull tap.
Peeling it completely reduces workability.
Check the order due to workability
Check the order due to workability
Contact the FPCB and joint end of the
transparent electrode film with the glass.
Grasp the opposite end. Note that the
ITO is positioned by adhering.
Do not bend the PWB (FPCB section) and sheet (ITO section).
Adhere the transparent electrode
completely.
Peel the front protective sheet.
If bubbles are found, press those portions with glass cleaning
cloth, etc. to remove them as much as possible.
Use a rubber roller since pressure
exerted by it removes bubbles easily.
