Grundig POWERMAX Q2, Руководство по обслуживанию

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OPERATING PRINCIPLES OF THE CIRCUIT COMPONENTS
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IC100 Main integrated
(IC-SMD
MSD95M0D BGA TRY)
Main integrated circuit IC100's specifications:
UHD and FHD support, digital (DVB-T/T2/C)
and analog broadcasting demodulator, USB
recording feature, Broadcast and A/V decoder
(NTSC/PAL/SECAM), Full HD 50Hz support,
MPEG-2 and MPEG-4 support, 32-Bit Linux
based processor, Audio and subwoofer proces-
sor and interface, 1 USB 2.0, 2 USB 3.0, 4
HDMI, 6 DDR3 RAM, HEVC H.265 support.
Main integrated circuit collects and processes
data coming from all inputs and sends audio
and video output to the speaker over ampli-
fier and to the panel over LVDS, Vby1 line.
This integrated circuit has more than 500 legs.
Special equipment is required for installation
and removal. Therefore, these integrated circuits
are designed with very low error ratios. If you
suspect any error with main IC on TV, firstly
supplies of this IC should be checked. There are
5 input supplies as 1.5V, 1.1V, 1.0V and 3.3V.
Extremely low or high ratings of these supplies
might cause image freezing, some sources' not
functioning or losing the picture completely.
Besides, the problem might be originated in
software, flash, crystal or RAM. If there is a
problem, we cannot be sure that it is originated
in IC before checking it out.
While turning the TV on, main IC switches on
the system by reading the flash and turns on the
power supply by switching the "POWER_SWX"
signal to high. Then, panel signals "BRI_ADJX"
(Sets backlight brightness), "TCON_ON" (turns
on Panel TCON board, panel supply) and
"BL_CTRLX" (turns on backlight) turn on panel
backlight and the image appears on TV.
IC200,201,202,203 DDR3 RAM
(IIC-SMD K4B4G1646E-BCNB FBGA T&R)
RAM is the place where the main integrated
circuit performs the processes such as decod-
ing, encoding, image and video resolution in all
applications. Similar to a calculator, it constantly
carries out the processes to ensure the opera-
tion of TV. RAM supplies should be carefully
checked. Fluctuations in RAM supplies may
cause various errors. Sudden rise or fall of RAM
supply might freeze the television and cause
picture lagging.
IC608 EMMC flash
(IC-SMD THGBM-
BG5D1KBAIL P-WFBGA T&R)
IC608 Flash memory is where the system
operating software is installed. System software
starts to operate as soon as TV is turned on.
This software installed in the flash controls all TV
functions.