Service manual

A. A/D converter (PC & YPbPr) and DVI(HDCP) input
The MST5151LA offers designers the flexibility of an analog interface and High-Definition
Multimedia Interface (DVI) receiver integrated on a single chip. Also included is support for High
bandwidth Digital Content Protection (HDCP).
Analog Interface
The MST5151LA is a complete 8-bit 165 MSPS monolithic analog interface optimized for
capturing Component Video (YPbPr) and RGB graphics signals. Its 165 MSPS encode rate
capability and full power analog bandwidth of 300 MHz supports all HDTV formats (up to 1080p)
and FPD resolutions up to UXGA (1600 x 1200 @ 60 Hz). The analog interface includes a 165
MHz triple ADC with internal 3.3V reference, a Phase Locked Loop (PLL), and programmable
gain, offset, and clamp control. The user provides only 1.8V and 3.3V power supply, analog input,
and Hsync. Three-state CMOS outputs may be powered from 1.8V to 3.3V. The MST5151LA
on-chip PLL generates a pixel clock from Hsync. Pixel clock output frequencies range from
12MHz to 165 MHz. PLL clock jitter is typically less than 500 ps p-p at 165 MHz. The
MST5151LA also offers full sync processing for composite sync and Sync-on-Green (SOG)
applications.
Digital Interface
The MST5151LA contains a DVI(HDCP) 1.0 compatible receiver and supports all HDTV
formats (up to 1080p) and display resolutions up to UXGA (1600 x 1200 @ 60 Hz). The receiver
features an intra-pair skew tolerance of up to one full clock cycle. With the inclusion of HDCP,
displays may now receive encrypted video content. The MST5151LA allows for authentication of
a video receiver, decryption of encoded data at the receiver, and renew ability of that
authentication during transmission as specified by the HDCP v1.1 protocol.
Fabricated in an advanced CMOS process, the MST5151LA is provided in a space-saving
100-lead LQFP surface-mount Pb free plastic package and is specified over the 0
o
C to 70
o
C
temperature range.
B. Video Decoder (video)
The SAA7117 is a highly integrated NTSC, PAL, and SECAM video decoder support for high
quality LCD-TV video applications, SAA7117 supports NTSC/PAL chroma and luma separation
using a 2-dimensional adaptive comb filter for reducing the cross-luma and cross-chroma artifacts.
The frame buffer is also use for 2D noise reduction circuit that resumes good visual quality when
the input signal is a noisy video source
The SAA7117 10-bits CMOS Analog-to-Digital Converters(ADC) at four-fold ”ITU656”
oversampling(54MHZ);Sixteen analog input pins.allowing fo multiple combinations of
composite.S-Video component video;Eight 3-level capable sensor pins for D-connector or SCART
AV- and RGB- switch signals(three of those can be active simultaneously),one Fast blanking
input;Level sensitive fast blanking(RGB switch control);I²C read back of digital AGC gain factor;
The component, composite, or S-Video signals are sampled at a free-run external clock frequency
(10~58.6 MHz). After the video decoder processing, the video data was sent out with a line-locked
alignment rate (24.576 MHz).
The SAA7117 comes with 160-pin QFP package.
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Do Not Copy N3250w-G
11. Working
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rem