Samsung HP-R5052 Service Manual page 49

Troubleshooting
6-2-5 No Video
Symptom - A normal/cable network analog broadcast screen is blank or abnormal.
- Check the antenna connection settings
(Antenna 1 - NTSC (Cable), 64QAM, 256QAM, Antenna 2 - NTSC (Air), 8VSB (ATSC))
Major Checklist
- Check the tuner output signal (CVBS).
- Check the power input of the Main board.
Troubleshooting
Procedures
6-6
Is the antenna connection setting
properly configured?
Check CN1001 pin 2 for +33V
Replace the Main Board
Configure properly
Replace the Main SMPS
Samsung Electronics