Akai PDP4216M, Руководство по обслуживанию, Страница: 68 / 86

2-3. It Generates Unusual Pattern of Data
TCP IC unit
(1) In case of line shape or dotted line occurs, check the screw
on X B/D and make sure it is tight. When the there is not
change, replace the X B/D.
(2) In case of <case 1>
- confirm the connection of Data TCP connector
- Replace relevant XB/D or CTRL B/D
(3) In case of <case 2, 3>
- confirm the connector that is connected from CTRL B/D to
relevant X B/D
- Replace relevant XB/D or CTRL B/D
[ [
Screen Display Form
2-4. The screen display has a problem for
Scan FPC.
(1) It may be a problem between Scan FPC and Y DRVB/D.
(2) Check the connection of Y DRV B/D and Scan FPC.
(3) If the Scan IC is failed, replace the Y DRV B/D.
(Check the compatibility)
[ [
Screen Display Form
[ [
Check a method of SCAN IC
Change the Vpp Pin into ANODE and GND Pin into CATHOD
and then test the Diode with forward or reverse direction.
- 12 -
Unusual screen comes
out about one IC quantity
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
<Case 1>
<Case 2>
<Case 3>
1/12
of screen
The screen display is very good
The screen display is poor
All manuals and user guides at all-guides.com