Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD TV LE37S73BD 12_Circuit Description
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13 Circuit Descriptions
13 Circuit Descriptions
13-1 Main Signal Description
13-1
13 Circuit Descriptions
13-2 DTV Signal Description
13-2
13 Circuit Descriptions
13-3 DTV Signal Description (Only for Italy/Spain)
13-3
13 Circuit Descriptions
13-4 RF/DTV Tuner (DNOS303ZH261B(S)) SPEC.
1. Description
1-1 Receiving System : Designed to cover all bands in VHF and UHF including digital terrestrial(DVB-T)
and hyper channels for CCIR system.
1-2 It built in COFDM-Demod IC & Analog Demod IC (PAL B/G, I, D/K, SECAM L/L')
1-3 Receiving Channel : 47MHz ~ 862MHz
1-4 Intermediate Frequency : Digital(center) 36.167 MHz, Analog(picture) 38.9MHz
1-5 Input Impedance : 75 , Unbalanced.
1-6 Terminals name and functi
Pin No Connection Remark Pin No Connection Remark
1 N.C 15 N.C
2 RF AGC 16 SYNC
3 5V 17 VALID
4 AFT 18 MD7 MPEG data output7
5 30V 19 MD6 MPEG data output6
6 GND 20 MD5 MPEG data output5
7 RESET 21 MD4 MPEG data output4
8 ERROR 22 MD3 MPEG data output3
9 VIDEO OUT 23 MD2 MPEG data output2
10 N.C 24 MD1 MPEG data output1
11 SIF OUT 25 MD0 MPEG data output0
12 3.3V 26 MPEG CLK
13 GND 27 SDA
14 N.C 28 SCL
2. Mechanical Characteristics
2-1 Dimensions : refer Fig1
2-2 Weight : 60g
2-3 RF input : RCA (female)
2-4 Holding Strength of Ant jack.
Withdrawal force of center contact
: Perform insert & extract test for 20 times. Into receptacle contact by using gauge, showing in Fig-2.
It shall be maintain 50g.
13-4
13 Circuit Descriptions
3. General Characteristics
3-1 Temperature Range
Storage Temperature : -20 ~ +80
Operation Temperature : 0 ~ +65
3-2 Test conditions : All data hold under following conditions
T(amb.) : +25 2 / Humidity : 45 ~ 65 % RH
Supply voltage(5V) : +5V 2%
Tuning voltage (BT) : +30V 2%
Supply voltage(3.3V) : +3.3V 2%
3-3 Current Consumption
Supply Voltage (5V) : 180mA Max.
Tuning Voltage(30V) : 5mA Max.
Supply Voltage(3.3V) : 160mA Max.
4. Electrical Characteristics ( RF block & Digital Demodulation )
4-1 Input Frequency Range
VHF-Low Band : 47MHz ~ 174MHz
VHF-High Band : 174MHz ~ 470MHz
UHF Band : 470MHz ~ 862MHz
4-2 Input Signal Level : -78dBm ~ -20dBm (Average power, 64QAM)
4-3 Voltage Gain
1st IF : 40dB typ. 38dBmin.
4-4 Noise Figure
1st IF : 4.5dB typ. 6.5dB max. (at max. gain)
4-5 OFDM-Demod IC : MT353 (produced by Zarlink)
4-6 Input Impedance : 75 .
4-7 RF Input/Output Return Loss : -8dB typ. -6dB min.
4-8 IF Frequency
1) Digital center frequency : 36.167MHz
2) Analog (PAL B/G, I, D/K, SECAM L/L')
Picture intermediate frequency :
38.9MHz(PAL B/G & SECAM L), 33.9MHz(SECAM L')
Sound intermediate frequency :
33.4MHz(B/G), 32.9MHz(I), 32.4MHz(D/K,SECAM L), 40.4MHz(SECAM L')
4-9 IF Response curve
1) Amplitude ripple in band (AGC Volt 4.0 ~ 0.8V) : 3dB max.
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