Sharp LC-22LE22E Service Manual ▷ View online
1. INTRODUCTION
17MB60 mainboard is driven by MStar SOC. This IC is capable of handling Video and
audio processing, Scaling-Display processing, 3D comb filter, OSD and text processing,
LVDS transmitting, channel and MPEG2/4 decoding, integrated DVB-T/C demodulator
and media center functionality.
audio processing, Scaling-Display processing, 3D comb filter, OSD and text processing,
LVDS transmitting, channel and MPEG2/4 decoding, integrated DVB-T/C demodulator
and media center functionality.
TV supports PAL, SECAM, NTSC colour standards and multiple transmission standards
as B/G, D/K, I/I’, and L/L’ including German and NICAM stereo. Also DVB T, DVB-C are
supported internal demoulators of Mstar IC and DVB-T2 is supported with externall
demodulator.
as B/G, D/K, I/I’, and L/L’ including German and NICAM stereo. Also DVB T, DVB-C are
supported internal demoulators of Mstar IC and DVB-T2 is supported with externall
demodulator.
Sound system output is supplying max. 2x2,5W ( less 10%THD at max output) with 4Ω
speakers or 2x6W for stereo 8Ω speakers.
speakers or 2x6W for stereo 8Ω speakers.
Supported peripherals are:
1 RF input VHF I, VHF III, UHF @ 75Ohm(Common)
1 Side AV (CVBS, R/L_Audio)
1 SCART socket(Common)
1 YPbPr (Optional)
1 PC input(Common)
2 HDMI 1.3 input(1 HDMI input is common, 1 input is optional)
1 S/PDIF output(Optional)
1 Headphone(Optional)
1 Common interface(Common)
1 USB(Common)
1 DVD(Optional)
1 iPod(Optional)
1 On-board Keypad(Optional)
1 External Keypad(Optional)
1 External TouchPad(Optional)
1 Side AV (CVBS, R/L_Audio)
1 SCART socket(Common)
1 YPbPr (Optional)
1 PC input(Common)
2 HDMI 1.3 input(1 HDMI input is common, 1 input is optional)
1 S/PDIF output(Optional)
1 Headphone(Optional)
1 Common interface(Common)
1 USB(Common)
1 DVD(Optional)
1 iPod(Optional)
1 On-board Keypad(Optional)
1 External Keypad(Optional)
1 External TouchPad(Optional)
1.1.
General Block Diagram
1.2.
MB60 Placement of Blocks
Main IC
(U157)
Tuner(TU102)
Nand
Flash
(U162)
Flash
(U162)
SPI
Flash
Flash
Ethernet
IC
(U171)
IC
(U171)
DDR2
RAM
(U155)
RAM
(U155)
DDR2
RAM
(U154)
RAM
(U154)
LVDS
Connectors
DVD
Connector
Connector
External
Keyboard
Touchboard
Keyboard
Touchboard
Power Connector
Saw
Filters
Filters
Keypad
YPbPr
SAV
HP
USB
HDMI
Connectors
Connectors
VGA
SCART
Connector
Connector
SPDIF
Out
Out
Ethernet
Connector or
Adapter DC
Input
Connector or
Adapter DC
Input
Speaker
Con.
Con.
Led
Con
Con
Inv.
Con
Con
CI Connector
1. TUNER(TU102)
A horizontal mounted and Digital Half-Nim tuner is used in the product, which covers 3
Bands(From 48MHz to 862MHz for COFDM, from 45.25MHz to 863.25MHz for CCIR CH).
The tuning is available through the digitally controlled I2C bus (PLL). Below you will find
info about the tuner.
Bands(From 48MHz to 862MHz for COFDM, from 45.25MHz to 863.25MHz for CCIR CH).
The tuning is available through the digitally controlled I2C bus (PLL). Below you will find
info about the tuner.
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.
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.
is low, ANT_CTRL will be low, so ANT_PWR will be low. Finally, short circuit protection is
done by circuits and microcontroller.
1.1. 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.
863.25MHz for CCIR CH). Band selection and Tuning are performed digitally via the I2C
bus.
1.2. 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
48.25MHz to 863.25MHz
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