Hitachi HTD-K185UK, Руководство по обслуживанию

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1 laser digital audio output
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Also there are antenna inputs for AM/FM tuner, antenna in and tv out for
dvb-t receiver.
•TOTX176 is used for laser output.
•For coaxial audio output SPDIF is used.
•SCART pin 8 controls 16:9 and 4:3 mode using Q617 and Q619.
•When the pin 8 output of the scart becomes 12 Volts, 4:3 mode is selected and 16:9
mode is selected when this output becomes 5.
• S-video output is active only in dvd mode.
• RGB outputs of output scart is active only in DVD and Scart Mode. It is not used in
RGB mode. Becouse of this in AV mode, the voltage level at pin 16 of the output scart is
below 1 V.
11.4 DVB-T & DDX Board (Class-D Amplifier):
11.4.1 DDX Part
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Chipset: lxDDX-8228 + 2x DDX-2050
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Architecture : Full-Bridge x 2, Half-Bridge x4
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Power Supply : + 20V unipolar supply @ 6A max., + 3.3V @ 0.1A typ.
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Audio Input Interface: Serial I2S
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Control Interface: I2C
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Power Interface: + 20V @ 6A Max., + 3.3V@ 0.1A Typ
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Output Interface: Speaker Level
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Speakers: 8 Ohm Sate 4 Ohm Subwoofer
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Output Power: 5 x 15 W +25 W
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DDX Audio proccess IC is U2 (DDX-8228).
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U2 IC on the DDX board has digital audio input with I2S bus.
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I2S signals are SDI12, SDI34, SDI56 serial data lines U2 pin9, pin8, pin7 LRCKI
Left-Right clock signal U2 pin 10, BICKI serial clock signal U2 pin 11.
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For mute function U2 IC uses EAPD (pin51, External Amplifier Powerdown) signal.
This signal comes to the power output ICs U3 and U4 (DDX-2050 ICs Pin25) as power
down signal.