Sharp LC-40LS340E, Service Manual

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4
Sound system output is supplying 2x8W (10%THD) for stereo 8 Ÿ speakers
Supported peripherals are:
x 1 RF input VHF I, VHF III, UHF @ 75Ohm(Common)
x 1 Side AV (CVBS, R/L_Audio)
x 2 SCART socket(Common)
x 1 YPbPr (Common)
x 1 Side S-Video(Common)
x 1 PC input(Common)
x 4 HDMI 1.3 input(Common)
x 1 Common interface(Common)
x 1 Optic S/PDIF output(Common)
x 1 Stereo audio input for PC(Common)
x 1 Subwoofer output(Common)
x 1 Headphone(Common)
x 2 USB(Common)
x 1 Bluray/DVD(Optional)
x 1 Ethernet-RJ45 (Common)
x 1 External Touchpad(Common)
2. TUNER
FT 2112/3/8/9 are newly developed Half-NIM modules designed for both digital
(DVB-T and DTMB for terrestrial China) and analog TV reception in compliance with
the European ATV standards for analogue, as well as with the terrestrial standard ETS 300
744 for DVB-T . It consists of a 3-band RF tuner, which receives RF signal
and down-converts it to an IF frequency of 36MHz for digital and 38.9MHz for analog IF.
The analogue IF output can directly drive a SAW filter. A digital IF Stage, which consists of
one SAW filter & gain-controllable IF that offers a sufficient output level to be connec ted
directly to an A/D converter.
In active antenna option, the following circuit are used. ANT_CTRL pin is controlled by
microcontroller. If ANT_CTRL is low, ANT_PWR will be low. If ANT_CTRL is high,
ANT_PWR will be high. OVER_CUR_DETECT pin is a monitor for short circuit in antenna.
OVER_CUR_DETECT is low, ANT_CTRL will be low, so ANT_PWR will be low. Finally,
short circuit protection is done by circuits and microcontroller.
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LC-40LS340