Core tips£ºSamsung LA46F71B LCD TV circuit composition and working principle
3.HDMI input connector and receiver circuit analysis
(1) has 2 HDMI input HDMI input interface circuit interface, as shown in Figure 11-7.
To the HDMI input connector a below, for example, illustrate the process of circuit.
HDMI signal by connection cable sent to LCD TV of HDMI interface connection socket Shang, HDMI socket ¢Ù feet and ¢Û feet, and II feet and ¢Þ feet, and sadly feet and Krispy Kreme feet for 3 a channel (2 channel, and 1 channel and 0 channel) of TMDS digital signal, HDMI interface of ¢â, and 12 feet for TMDS clock signal, these signal by D310~D317 two-way limited site Hou, sent to HDMI interface chip IC604 (MST3386).
Memory IC300 (AT24c02) is a HDMI interface for DDC memory used to store basic information about LCD TVs (such as manufacturer, model number, display mode configuration, and so on) for HDMI device to read at any time, and complete identification of the LCD TV.
19 foot HDMI interface as hot plug detect (HPD) end, HPD is from LCD TV a test signal output to the HDMI device, can be detected by HPD pins HDMI HDMI devices connected, in order to make an appropriate response.
(2) HDMI receiver HDMI receiver to HDMI receiver chip IC604 (MST3386) as the core component, as shown in Figure 11-8.
Includes HDMI input connector a receives the data and clock signals added to IC604 II, f, h, and Krispy Kreme, 11, 12, 14, 15 feet; by the HDMI input connector b receives the data and clock signals added to IC604, 16, 17, 19, 20, 22, 23, 25, 26 feet. Processed by IC604 decoding and decrypting the data entered, access to digital RGB signal and digital audio signal, where the digital RGB signal output by the IC604, 71~78, 83~90, 104~111 feet, to the video controller IC502 (SVP LX61) for further processing. IC604 outputs digital audio signals output by 120, 121, 122, 124 feet, added to the audio d/a converter circuit of IC603 (PCM1754DBQR), processed by the IC603, to convert digital audio to analog HDMI_SR, HDMI_SL audio signal, sent to the audio switching circuit for IC115 (MM74HC4052) switch.
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