Samsung 320PX Manuel de service télécharger pdf (Page 46)

4 Troubleshooting

4-7

4-4 No BNC Video

Does 3.3 V appear at

ZD109 ~ 113?

Press the power button and

check the LED.

YES

NO

Is the cable properly

connected?

Reconnect the BNC cable.

Check the cable between the

main board and panel and

replace the LCD panel.

NO

Does the wave form appear at

Pin 6 (H-sync)

And Pin 8 (V-sync) of

IC103?

Replace IC103.

NO

Does the TX** signal appear

at Pin 14 and 15

of CN403?

The scaler (IC408) is abnormal.

Replace the main board.

NO

YES

YES

9

10

YES

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