How To Replace The Touch Key Sensor Pwb - Sharp LC-40LE820UN Service Manual

[6] How to replace the touch key sensor PWB

1. Replace the touch key sensor PWB in a clean room.
Be sure to remove the dust from the unit before carrying it into the clean room.
2. Remove the touch key sensor PWB from the front glass.
3. Clean the bonding surface with alcohol.
Depending on the dirt, water solution of 80%vol can be effective.
4. Adhere a spacer before bonding the touch unit.
Product Manual Touch Sensor with ITO (Transparent Electrode)
FPCB/ITO connecting tape
i) Remove the touch sensor from the front glass.
ii) Adhere the spacer to the back of the FPCB section.
FPCB
Pull tap of double-sided tape
ITO
* 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.
Spacer
Release paper
RL
RL
4 – 23
LC-40/46/52/60LE820UN
Pull tap of double-sided tape
Pull tap of protective sheet
ii-1. Peel the release paper of the double-sided
tape on the FPCB section.
ii-2. Adhere the spacer to the FPCB section.
(Use the right and upper sides of the FPCB
section as a reference.)
* Check that the spacer does not contact with
the ITO section.