Dvb-T - Hitachi 22LD3750DC Service Manual

5.2 Infra-red & LED
A five-pin connector is used between 17MB29 and the LED board: Pin2 and pin3 carry the control
signals for the LED. Pin4 carries the infra-red signal to the microcontroller. Pin5 is used to power up the
LED board.
5.3 DVB-T module board
DVB-T module board (TDM1300) is used to receive digital terrestrial broadcast signals. Three
cables are used to connect 17MB29 and TDM1300: power, data and IF.
12V (500mA) is sent to TDM1300 by power cable:
Analog RGB(YPbPr), CVBS, stereo audio, tuner control (SCL, SDA, AGC), and three GPIO port
outputs of TDM1300, together with UART ports (TV_RXD, TV_TXD, IRQ) are carried by data cable.
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