SAMSUNG SYNC MASTER 757DFX
Manual de Servicio

5 Troubleshooting

5-2 General Troubleshooting
5-2-1 No Picture
Yes Go to 5-2-2 Shut down troubleshooting guide.

LED blinks?

WAVEFORMS
20 R, G, B, Video

No G2 Voltage is right? No Check D598, D599 and G2 wire. Also check around FBT circuits. Yes Heater Voltage is right? No Check CN201 Assy and D642, Q672.

Yes
20

R, G, B Cathode is right?

No

Return back the No Video (5-1-16) troubleshooting guide.

Yes Check the CRT Socket which it is connected with CRT. Replace the CRT.

5-2-2 Shut Down

LED is blinking so fast (Once per 300m sec)? No LED is blinking once a second? Yes Check signal cable and signal source.

Yes

Check SDA (IC201 Pin 30) and SCL (IC201 Pin 29) Replace IC280, IC201.

AQ17HS/AQ17IS/AQ17NS AQ19MS/AQ19IS/AQ19NS/AQ19FS

5-13