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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