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Troubleshooting

5. Troubleshooting
5-1 No Video (Raster On, No Sound)

Open the IF Pin of Tuner

Measure the Voltage of Each Pin of TU01S

No

Check/Replace TU01S

Yes

Check IC201S Pins 2,3 Yes

No

Check/Replace IC201S

See "No Sound" (Video OK)

Check IC201S Pins 40,49,50

No

Check/Replace IC501, IC201S

See "No Video" (Sound OK)

See "No Sound" (Video OK)

Samsung Electronics

5-1

Troubleshooting

5-2 No Power

Check the 125V, 13.0V B+ Lines

No

Check/Replace IC801S, D801S, D802S, D803S,D804S,FP801S

Yes

Check IC802 Pin 8 (8V) Pin 9 (9V) Pin 10 (5V)

No

Check/Replace IC802 (KA7632)

Check IC201S Pin 1 (3.3V)

No

Check/Replace IC201S

Yes

Check IC201S Pin 1 : Stand-by : 0V Normal : 3.3V

No

Check/Replace IC201S, (µ-com).

Check IC201S, Pin 33 (H-out)

No

Check/Replace IC201S, Q401, Q402.

5-2

Samsung Electronics

Troubleshooting

5-3 No Video (Sound OK)

Check IC201S Pin 40 (CVBS)

No

Check/Replace IC201S

Yes

Check IC201S Pins 38/R214, R215

No

Check IC201S Pin 49 (V-GUARD) Pin 50 (Cut-off) Pin 51~53 (R,G,B-out)

No

Check/Replace IC201S

Yes

Check IC501 on the CRT PCB

No

Check/Replace IC501

Check/Replace R421, R505 (HEATER 6.3Vrms) D503 (CRT G1 pin) CRT, V999S

Samsung Electronics

5-3

Troubleshooting

5-4 No Sound (Video OK)

Check IC201S Pin 44 (Sound Out)

No

Check/Replace IC201S

Yes

Check IC601 Pins 6 (0V)

Yes

Check/Replace Q904, IC201S

No

Check IC601 Pin 3,13 (B+ 10-12.5V)

No

Check/Replace R814, R815

Yes

Check IC601

No

Check/Replace IC601

Yes Check/Replace A/V Front assembly.

5-5 No TTX

Check IC201S

No

Check/Replace IC201S

Yes

See No Video

5-4

Samsung Electronics