Sharp LC-22LE510K (serv.man2) Service Manual ▷ View online
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LC-19LE510
LC-22LE510
LC-24LE510
2.1.General description of Samsung DTOS403LH122X:
The Tuner covers 3 Bands(from 48MHz to 862MHz for COFDM, from 45.25MHz to 863.25MHz for CCIR
CH). Band selection and Tuning are performed digitally via the I2C bus.
2.2.Features of DTOS403LH122X:
Receiving System: This TUNER is designed to cover the air channels in VHF and UHF, compliant
with DVB-T standard. and It covers all Analog channels from 48.25MHz to 863.25MHz
Receiving Channel (Digital, Center frequency):
VHF Low CH. E2 ~ S10 ( 50.5MHz ~ 170.5MHz )
VHF High CH. E5 ~ S41 ( 177.5MHz ~ 466 MHz )
UHF CH. E21 ~ E69 ( 474 MHz ~ 858 MHz )
Receiving Channel (PAL, Picture carrier frequency):
VHF Low CH. E2 ~ S10 ( 48.25MHz ~ 168.25MHz )
VHF High CH. E5 ~ S41 ( 175.25MHz ~ 463.25MHz )
UHF CH. E21 ~ E70 ( 471.25MHz ~ 863.25MHz )
Intermediate Frequency:
Digital(center) DVB-T (36.167 MHz)
Digital(center) DVB-C (36.125 MHz)
Analog(picture) 38.9 MHz
Input Impedance
: 75Ω, Unbalanced
Band Change-Over System
: PLL Control System
Tuning System
: Electronic Tuning System With PLL
Internal(or External) RF AGC function :Built in wideband AGC detector with 6 programmable take-
over points
over points
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LC-19LE510
LC-22LE510
LC-24LE510
2.3.Pinning:
Pin no.
Terminal Name
Pin Description
1
Ant Power
Active Antenna Power
2
B+
+5V, Supply Voltage (Preamplifier, DC/DC)
3
RF AGC
RF AGC (internal or external mode)
4
CL
I2C Serial Clock
5
DA
I2C Serial Clock
6
BP
+5V, Supply Voltage (RF Amp, PLL, IF Amp)
7
BT(T.P)
+33V, within DC/DC circuit
8
AS
I2C Address Selection of the PLL
9
IF AGC
Control voltage for the IF AGC
10
IF OUT +
Output 2 of the IF Amplifier
11
IF OUT -
Output 1 of the IF Amplifier
12
AIF Output
IF output of the Analog Broad-Band
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LC-19LE510
LC-22LE510
LC-24LE510
3. SAW FILTER – Audio – Epcos K9656M(Z101)
3.1.Standard
B/G
D/K
I
L/L’
3.2.Features
TV IF audio filter with two channels
Channel 1 (L’) with one pass band for sound carriers at 40,40 MHz (L’) and 39,75 MHz (L’-
NICAM)
Channel 2 (B/G,D/K,L,I) with one pass band for sound carriers between 32,35 MHz and
33,40 MHz
3.3.Pin configuration
1 Input
2 Switching input
3 Chip carrier - ground
4 Output
5 Output
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LC-19LE510
LC-22LE510
LC-24LE510
3.4.Frequency response
Frequency response of channel 1
Frequency response of channel 2
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