Sharp LC-22LE510K (serv.man2) Service Manual ▷ View online
21
LC-19LE510
LC-22LE510
LC-24LE510
DIMENSIONS
INTRODUCTION
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.
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 color 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 demodulators of
MStar IC and DVB-T2 is supported with external demodulator.
MStar IC and DVB-T2 is supported with external demodulator.
Sound system output is supplying max. 2x2,5W ( less 10%THD at max output) with 4Ω speakers or 2x6W
for stereo 8Ω speakers.
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)
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LC-19LE510
LC-22LE510
LC-24LE510
1.1 General Block Diagram
1.1.
General Block Di
agram
23
LC-19LE510
LC-22LE510
LC-24LE510
1.2 MB60 Placement of Blocks
1.2.
MB60 Placement
of Bl
ocks
Mai
n IC (U157)
Tuner(TU102)
Nand
Flash
(U162)
SPI
Etherne
t IC
DDR2
DDR2
RAM
LVDS
Connectors
DVD
External
Keyboard
Power Connector
Saw
Filte
r
Keypad
YPbPr
SAV
HP
HDMI
Connectors
VGA
SCART
Connector
SP
D
IF
Ethernet
Connector
or
Speake
Led
Inv.
CI Con
nector
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LC-19LE510
LC-22LE510
LC-24LE510
CIRCUIT DESCRIPTIONS
2. 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.
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 logic high.
ANT_CTRL is low, ANT_PWR will be low. If ANT_CTRL is high, ANT_PWR will be logic 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.
microcontroller.
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