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1. Checking for no Picture
A screen doesn' t display at all and condition of black pattern or power off.
(1) Check whether the CTRL B/D LED(D2) is turned on or not.
(2) Check the power and signal cable of CTRL B/D.
(3) Check the power connection of X B/D, Y B/D and Z B/D.
(4) Check the connection of X B/D, Y B/D and Z B/D to CTRL B/D.
(5) After measure the output wave of X, Y and Z B/D, find the trouble of B/D by comparing with below figure and replace.
- Measure Point fo Y B/D : TP (Bead B41)
- Measure Point fo Z B/D : TP ((Bead B11)
- Measure Point fo X B/D : COF TP
(6) Check the SCAN IC.
(7) Check the DATA COF.
(8) Replace the CTRL B/D.
Trouble Shooting
- 9 -
<Y B/D Output wave - 1FRAME>
<Z B/D Output wave - 1FRAME>
<COF Output wave - 1FRAME>
<COF Output wave - 1SF>
<COF Output wave - Enlargement>
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