Text preview for : SRT_4125_service_manual.pdf part of STRONG SRT 4125 service manual STRONG Sat SRT_4125_service_manual.pdf
Back to : SRT_4125_service_manual.p | Home
Settop-Box
Service Manual
Model : Srt4125
CONTENTS INDEX
1. Block Diagram................................................................ 3 page
2. Features........................................................................ 4 page
3. Technical Specification................................................... 5~8 page
4. Trouble Shooting............................................................ 9~17 page
5. Bill of Materials List........................................................ 18~24 page
6. Circuit Drawing............................................................... 25~37 page
6-1. Main / Front PCB Board
6-2. SMPS PCB Board
7. Firmware, OTA Software Downloading Method............ 38~39 page
1. BLOCK DIAGRAM
LNBP & 22K CONT
QPSK NIM
LNB OVER CURRENT PORT SERIAL SDRAM MEM
INTERFACE (16Mbit)
AC IN : 90 ~ 240 VAC
MAX 40W
SMPS
L64005F
3.3V
MPEG
5V L64108
A/V
7V CPU & MPEG
DECODER
12V DEMUX
22V
30V
FRONT BT864
(7-KEY VIDEO
IR RCV DRAM MEM (16Mbit) ENCODER
2-LED) FLASH MEM(8Mbit)
EEPROM(64Kbit).
VCR(WITOUT VOLUM CONTROL)
CVBS,L,R OUT
AUDIO-DAC CVBS,L,R IN
(PCM1723) VCR SCART
TV : CVBS,L,R,RGB OUT
TV SCART
SCART
CONT 4-RCA
(74HC4053 ) (CVBS,L,R,12V)
* 2 PCS
RF MODULATOR
(RMUP74055WT)
2. Features