Samsung TB20A53X, TB14A53X-XSA Block Diagram

9. Block Diagrams

9-1 C15C Video Block Diagram

Block Diagrams

Samsung Electronics 9-1

9-1-1 Notes

The TV’s 1st and 2nd tuners (and VCR module) are “multi-system.” compatible:
IC201 (TDA8842/8841) is the video, chroma, and deflection (VCD) IC .

9-1-1(A) TAPE PLAYBACK (REGARDLESS OF ORIGINAL RECORDING SYSTEM)

If the output PB signal of micom pin 6 is high, the PB signal outputs from module deck 2, passes
through IC 702 pins 2 and 3 and out to another VCR . The output signal of IC701 pin 1 (pin 15)
outputs from IC201S pin 17 .

9-1-1(B) VIEWING NORMAL CHANNEL WHILE RECORDING A SCRAMBLED CHANNEL:

The output CVBS (Composite Video Signal) of the 2nd IF outputs to IC702pin 3 when the micom’s pin 7
V/T/H (VCR tuner high) is high . The decoded signal goes to IC701 pin 2, where it is fed to IC 701 pin
4 (high output of micom’s’ pin 8— AV/Tuner), and out to VCR pin 4 (module deck) for recording.

9-1-1(C) VIEWING A SCRAMBLED CHANNEL WHILE RECORDING AN UNSCRAMBLED CHANNEL.

The output CVBS of the 2nd IF is fed from IC701 pin 5 to IC701 pin 4 (low output of micom
pin 8—AV/tuner). Then it goes to the module deck pin 4 for recording.

The scrambled signal (CVBS) is fed to IC702 pin 1 through the 1st IF, and then to IC702 pin 3 (micom’s
pin 7, V/T/H registers low). Then it goes to the decoder input. The descrambled signal goes to IC701
pins 2 and 15 (PH high output of micom’s pin 6), and then to IC201S pin 17, where it outputs as RGB.

9-1-1(D) SYNCHRONOUS RECORDING:

The viewer sees the signal from the 1st tuner , while the signal from the second tuner is recorded.
Audio processing for the French system type is shown in the table.

Block Diagrams

9-2 Samsung Electronics

9-2 C15C Video Block Diagram (Continued)