Circuit Operating Descriptions
14-46
Samsung Electronics
RF and frequency synthesized tuning system
General description : The receiving circuit consists of both ANT input and output circuits, channel selection cir-
cuit, PIF circuit and SIF circuit. The receiving circuit selects a desired broadcast signal from TV signals induced on
an antenna and sends stable video and audio signals to their respective processing circuits.
(2) Tuner modulator block
As explained, this model is designed in one package to contain a RF MODULATOR BLOCK, TUNER BLOCK
AND IF DEMODULATOR BLOCK. Its size is greatly reduced and other noise interference can be minimized to
make performance high.
Fig. 14-29 Tuner/demodulator Block Diagram
ANT INPUT
(MODULATOR SECTION)
(TUNER SECTION)
(IF SECTION)
ANT OUT
Off
through
SW
VHF
RF AMP
UHF
RF AMP
UHF
Mixer
VHF
OSC
FM
Detector
SIF
Filter
UHF
OSC
PLL
IC
AGC
AFT
Mixer
IC
SAW
Filter
IF
AMP
Video
Detector
TV SET
SCL
X-TAL
IN
SDA
AUDIO OUT
AFT OUT
VIDEO OUT
9
7
10
13
11
16
14-14 TM
(1) Outline
Summary of Contents for DVD-VR320/XEF
Page 32: ...5 22 Disassembly and Reassembly Samsung Electronics MEMO ...
Page 68: ...Troubleshooting 6 36 Samsung Electronics MEMO ...
Page 76: ...Exploded View and Parts List 7 8 Samsung Electronics MEMO ...
Page 216: ...Circuit Operating Descriptions Samsung Electronics 14 17 Fig 14 12 IC601 Block Diagram ...
Page 249: ...Circuit Operating Descriptions 14 50 Samsung Electronics MEMO ...