LG PFM-42V1E, Service Manual

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2-3. It Generates Unusual Pattern of Data
COF IC unit
(1) In case of generating unusual pattern of Data COF IC unit
as below picture, there is problem in the check that is input
into Data COF IC
(2) In case of <case 1, 2, 3>
- confirm the connection of Data COF connector
- replace the relevant X B/D
(3) In case of <case 4, 5>
- confirm the connector that is connected from CTRL to X B/D
- Replace relevant XB/D or CTRL B/D
[ Screen Display Form
2-4. Regular Stripe is Generated about the
Quantity of one Data COF IC or more
(1) In case of generating regular stripe about the quantity of
one Data COF IC, there is problem at the output of output-
flatworm of X B/D
In case of generating regular stripe about the quantity of
two Data COF IC, that means the data which is conveyed
from CTRL B/D doesn t conveyed well.
(2) Confirm the XB/D connection connector plugged in well.
Correspond to unusual screen.
(3) Replace relevant XB/D or CTRL B/D.
[ Relationship between screen and X B/D
Screen X B/D
Left Bottom of the Screen 4/7 <--> Right X B/D
Right Bottom of the Screen 3/7 <--> Left X B/D
[
Screen Display Form
<Case 1>
<Case 2>
<Case 3>
<Case 4>
<Case 5>
Unusual screen comes out
about one IC quantity in
one COF
Unusual screen comes out
across one quantity about
two IC quantities in one
COF
Unusual screen comes out
about 4IC quantities in
one COF
Unusual screen comes out
as a unit of Data COF IC
through one X B/D
Unusual screen comes out
as a unit of Data COF IC
through Top or Bottom
screen
It comes out partial field about
the quantity of one IC or more
or It may come out together
at other field of screen.