Daewoo DPP-42A1LCSB, Service Manual

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English
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2-5. The screen display has a problem for
Scan FPC.
(1) It’s may be a problem between Scan FPC and Y DRV B/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.
[ [
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.
2-6. The screen has a vertical line with
regular gap.
(A vertical stripe flash at especial color)
(1) This is a problem about CTRL B/D.
(2) Replace the CTRL B/D.
[ [
Screen Display Form
2-7. A data copy is happened into vertical
direction
(1) In this case, it’s due to incorrect marking of scan wave.
(2) Replace the Y DRV B/D or Y B/D.
[ [
Screen Display Form
one eighth
of screen
The screen display is very good
The screen display is poor
The screen has a vertical line
with regular gap
<Case 1 : Entire Copy> <Display Pattern>
<Case 2 : Top Copy>
<Case 3 : Bottom Copy> <Case 4 : Entire Copy>