Block Diagram - Samsung TX20C53X/XET Service Manual

Troubleshooting
6-4 No Picture (Sound OK)
1 Check the Brightness, Contrast and Color adjustments
2. Check: AV Picture, Video Playback
3. See Video Block Diagram
6-5 No Sound (Picture OK)
1. Check the Volume adjustment level.
2. Check AV Video, Sound Playback
3. See Audio Block Diagram
6-6 RF Weak Signal (Playback, AV Mode OK)
1. Check Tuner (TU01S) B+. Check: 9V (IC807)
33V (DZ803). Check 5V (IC902S)
2. Pre AMP (HC001S), B+. Check: 9V (IC807)
6-7 Recording Defect
1. CN101 Check : Retouch
2. 2nd Tuner (TU02S) B+. Check : 33V(DZ803)
3. 2nd If : Check 9V (IC806), Video out, Audio out
4. Video Defect : IC701 Check
5. Audio Defect : IC701 Check
6. Standby Recording Defect, IC901S #5 Line: Check (D834, IC804, IC807, IC806)
7. VPS (PDC) Recording Defect: Check IC901S, #4
6-4
5V (IC808)
Samsung Electronics