Philips BDL46xxE, Руководство по обслуживанию

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Philips BDL46xxE 14
CHAPTER 3
THEORY OF OPERATION
Index of this chapter:
1. Mstar MST5251A scaler
2. NECuPD64015 Video Decoder
3. TI PCM1753 Audio DAC
4. JRC NJW1141 Audio Processor
5. Winbond W79E659 MCU
6. Fintek F75101R GPIO Expander
7. Eon EN29F040A 4MBit Flash
8. YAMAHA YDA138 Audio Amplifier
9. Sipex SP3243 RS232 Transceiver
10. Mitsumi MM1671 Low Supply Voltage 75 Ohm Driver
11. EtronTech EM636165TS-5G SDRAM
12. National Semiconductor LM1881 Video Sync Separator NXP PCF8563 RTC
13. NXP PCF8563 RTC
14. ST TSH340 Video Buffer Pericom PI5C3253 Dual 1-of-4 FET Multiplexer / Demultiplexer
15. Pericom PI5C3253 Dual 1-of-4 FET
16. ESMT M13S128324A DDR SDRAM
17. ATMEL AT24C64AN EPROM
1. Mstar MST5251A scaler
The MST5251A is a high performance and fully integrated graphics processing ICsolution for
multi-function LCD monitor/TV with resolutions up to UXGA/WUXGA. It is configured with an
integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, two video de-interlacers, two high
quality scaling engines, an on-screen display controller, and abuilt-in output clock generator. By use of
external frame buffer, PIP/POP is provided for multimedia applications. It supports de-interlaced
full-screen video, video-on-graphic overlay, split screen, frame rate conversion, and aspect ratio
conversion for various video sources. To further reduce system costs, the MST5251A also integrates
intelligent power management control capability for green-mode requirements and spread spectrum
support for EMI management.
2. NEC uPD64015 Video Decoder
The uPD64015 is a video decoder LSI with an on-chip three-dimensional Y/C separation function that
supports NTSC-M and PAL-BDGHI composite signals and a three-dimensional noise reduction
function that supports all input signals. It includes four high-accuracy A/D converter channels for
analog video input, an anti-alias filter, Y/C separation, chroma decoding supporting
NTSC/PAL/SECAM, three-dimensional noise reduction supporting all input signals, and various
definition correction functions, and supports digital color difference output. The uPD64015
incorporates a 3-ch DAC and can output decoded video signals or signals output from the
incorporated SG (Signal Generator), in the form of RGB or analog color-difference signals.
3. TI PCM1753 Audio DAC
The PCM1753/54/55 is a CMOS, monolithic, integrated circuit, which includes stereo digital-to-analog
converters and upport circuitry in a small 16-lead SSOP package. The data converters use TI's
enhanced multilevel delta-sigma architecture, which employs 4th-order noise shaping and 8-level
amplitude quantization to achieve excellent dynamic performance and improved tolerance to clock
jitter. The PCM1753/54/55 accepts industry standard audio data formats with 16- to 24-bit data,
providing easy interfacing to audio DSP and decoder chips. Sampling rates up to 200 kHz are
supported. A full set of user programmable functions is accessible through a three-wire serial control
port, which supports register write functions.
4. JRC NJW1141 Audio Processor
The NJW1141 is a sound processor includes all of the functions required to process the audio signal
for TV, such as tone control, balance, volume, mute, and AGC functions. All of the internal status and