Beko Plasma TV Manuel de service télécharger pdf (Page 63)

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1. Checking for no Picture

A screen doesn¡ﬂt display at all and condition of black pattern or power off.

(1) Check whether the CTRL B/D LED(D10, D11, D12, D13, D17) is turned on or not.

(2) Check the power and signal cable of CTRL B/D.

(3) X B/D, Y B/D, Z B/D is well plugged in.

(4) Check the connection of X B/D, Y B/D and Z B/D to CTRL B/D.

(5) Measure the output wave of X, Y, Z B/D with oscilloscope(more than 200MHz)

and find the trouble of B/D by comparing the output wave with below figure.

- Measure Point fo Y B/D : TP(Bead B103)

- Measure Point fo Z B/D : TP(Bead B37)

- Measure Point fo X B/D : COF TP

(6) Check the SCAN(Y side) IC

(7) Check the DATA(X side) COF IC

(8) Replace the CTRL B/D.

¥†. Trouble Shooting

<A: Y B/D Output wave - 1 FRAME>

<B: Y B/D Output wave - 1 SF>

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Beko Plasma TV Manuel de service Page 63