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Troubleshooting

5. Troubleshooting
5-1 Convergence Misaligned

Normal

Check the output voltage and waveform of CN801, 803, CNZ02 on the Convergence Board

Abnormal

Check CNZ01 out pin (BZ, BH, RV, RH, GV, GH)

Abnormal

Normal

Check the associated circuitry

Check Convergence Moudle

1. Check FD802S, FD855S, FD805S, FD806S On the Power Board 2. Check the output from H-BLK, V-BLK the Main Board

Samsung Electronics

5-1

Troubleshooting

5-2 No Sound

Check if CN601 is inserted normal Check IC665 output pins 2, 4 Abnormal Check IC665 input pin 5 normal Check IC665 Mute pin 5 normal Check IC665 output pins 7, 11 Abnormal Check IC601 input pins 35, 38 Abnormal Check CNS01 input pins 5, 9 Abnormal Check IC703 input pins Abnormal Check CNS01 output pins 28

Abnormal Insert CN601 (Connector) normal Check Speaker

Abnormal Check FD854S on the Power Board Abnormal Check the Mute circuit

normal Check the Control

normal Check the Control

normal Check the Sound Module circuit normal Check IC703

5-2

Samsung Electronics

Troubleshooting

5-3 No Raster (Sound OK)

Normal

Check Heater

Check High Voltage Normal

Check CRT PCB pin 1 Normal Normal Check IC501, 531, 561 Abnormal Check CN501 (Connector) Normal Check CN01

Abnormal

Check Q473, R437A Normal

Check CN501 pins 1, 3, 5 Normal Check CN501 (Connector) Normal Check CN01 inpur pins 30, 31 Abnormal Check CNT02 input pins 19, 21 Abnormal

Check Q473 HV-REG Abnormal Check Q473, IC471 Abnormal Check HV-OUT BLOCK

Check Q472 input pin "G"(HV-DRIVER) Normal

Check HV-OUT BLOCK

Normal Check CNT02

Check IC02 input pin 24 Abnormal Check IC701 input pin 8 Abnormal Check CN01

Normal Check IC02

Normal

Check IC701

Samsung Electronics

5-3

MEMO

5-4

Samsung Electronics