strong str 204125 free download

File name Strong%20%20SRT%204125.pdf

Settop-Box Service Manual Model : Srt4125 CONTENTS INDEX 3 4 5~8 9~17 page page page page 1. Block Diagram... 2. Features... 3. Technical Specification... 4. Trouble Shooting... 5. Bill of Materials List... 6. Circuit Drawing... 6-1. Main / Front PCB Board 6-2. SMPS PCB Board 7. Firmware, OTA Software Downloading Method... 18~24 page 25~37 page 38~39 page 1. BLOCK DIAGRAM LNB QPSK NIM LNBP & 22K CONT SERIAL INTERFACE AC IN : 90 ~ 240 VAC MAX 40W SMPS L64005F 3.3V MPEG 5V 7V 12V 22V 30V L64108 A/V CPU & MPEG DEMUX DECODER SDRAM MEM (16Mbit) OVER CURRENT PORT FRONT (7-KEY IR RCV 2-LED) DRAM MEM (16Mbit) FLASH MEM(8Mbit) EEPROM(64Kbit). BT864 VIDEO ENCODER VCR(WITOUT VOLUM CONTROL) CVBS,L,R OUT AUDIO-DAC (PCM1723) CVBS,L,R IN VCR SCART TV : CVBS,L,R,RGB OUT TV SCART SCART CONT (74HC4053 ) * 2 PCS RF MODULATOR (RMUP74055WT) 4-RCA (CVBS,L,R,12V) 2. Features · Easy Graphic MENU Interface · RS232C Port for Updating Control Software and Additional Service · Supports DiSEqC1.0,1.2 · 2-SCART(TV,VCR) Connectors & RCA(CVBS,L,R) · Multi-language Function(Menu, Audio) · Last Channel Memory · OSD: Transparency & Blending, 16 Colors · Front Panel Buttons(S/B On & Off) & IR Remote Controller User Interface · Editing Functions(TV or Radio Channel, Channel Name, PID, Transponder Name) · EPG for On Screen Channel Information · Channels Memory for Multi-satellite(up to 64) · 3 Operation Modes(Digital TV, Digital Radio, Favorite) · Receives QPSK Satellite Broadcasting RF Signal and Decodes the Digitally Encoded Signal · Digital Tuner with Loop-through · SCPC/MCPC Receivable from C/KU-band Satellite · Wide Symbol Rate 2~45 Mbps & 950~2150 MHz input Frequency · MPEG-2 Main Profile at Main Level · Teletext Supported · 2100 Channels Memory(Digital 2000, Favorite 100) · PLL RF Modulator UHF 21~69 with PAL BG/I/DK 3. TECHNICAL SPECIFICATIONS Transmission Standards : DVB, MPEG2 1. TUNER & DEMODULATOR 950MHz to 2150MHz -25 ~ -65 dBm 75 ohms 55MHz / 8MHz(under 5Msps) 13.5 / 18.5Vdc +/- 5%,0.5Amax,1.2Apeak overload protected LNB tone switch DiSEqC Demodulation Symbol Rate 22KHz +/- 2KHz, 0.6Vpp +/- 0.2V Version1.0,1.2 Tone burst A/B QPSK 2 ~ 45 Msps / SCPC,MCPC Input Frequency Range RF input Signal Level RF impedance IF Bandwidth LNB Power 2. MPEG MPEG-2 TS Specification(ISO/IEC 13818) Max. 15Mbit/s MPEG-2 MP@ML MPEG-1/2 Audio layer 1,2 4:3, 16:9 720 Ч 576(PAL), 720 Ч 480(NTSC) Stereo, Dual channel, Joint stereo, Mono 32/44.1/48KHz Transport Stream Input Rate VIDEO AUDIO Aspect Ratio Video Resolution Audio mode Audio Sampling Frequency 3. Connector 1 Ч F Type 1 Ч F Type RGB, CVBS, L, R out CVBS, L, R out RGB,