Grundig 40VLE630BH, Service Manual

Page: 55 / 180

TP CHASSIS / TELEVISION
55 September 2011
IC305 is digital demodulator (decoder) integrated circuit. Digital broadcast (D_IF)
selected from DVB-S2 tuner enters demodulator IC. Demodulator integrated circuit
receives video and audio data loaded on the carrier frequency and this data is
separated from the carrier frequency and converted to the form required for
transmission to the main IC. For the efficient transmission of the signal, digital image
is sent to the main integrated circuit as transport stream. STV0903BAC demodulator
used in TP chassis is DVB-S2 compliant demodulator for digital satellite broadcasting.
IC306, IC-SMD STV6110AT VFQFPN32 T&R, DVBS2 Tuner IC:
The satellite receiver tuner obtains inter frequency signal of digital broadcast, similar
to the tuner in our chassis; filters this carrier frequency from other frequencies and
sends video and audio data on it to the demodulator after loading IF on inter-
frequency. DVB-S2 compatible tuner also enables viewing HD broadcast from the
satellite. It runs with 3.3V supply power and 16MHz crystal frequency. And its outputs
are directly sent to the demodulator.