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Strong SRT4155Evolution Service Manual

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Settop-Box
Service Manual
Model : SRT4155Evolution

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Summary of Contents for Strong SRT4155Evolution

  • Page 1 Settop-Box Service Manual Model : SRT4155Evolution...
  • Page 2 CONTENTS INDEX 1. Block Diagram … … … … … … … … … … … … … … … … … … … … . 3 page 2. Features .… … … … … … … … … … … … … … … … … … … … … … … 4 page 3.
  • Page 3 1. BLOCK DIAGRAM FRONT (7-KEYs, LEDs, IR Reciever) SERIAL INTERFACE 2 - SLOT (ST3232CD) PCMCIA A-DAC (AK4351) S/PDIF OUT (TOTX178) SHARP QPSK CI INTERFACE (BS2F7VZ0184) VCR SCART CPU & MPEG SCART TV SCART CVBS CONT. LNBP & 4 - RCA (STV6412) 22K CONT.
  • Page 4 Features • DVB Common Interface (Viaccess, , Irdeto, Nagra Vision, Conax, CrytoWorks, AlphaCrypt etc) • Easy Graphic MENU Interface • RS232C Port for Updating Control Software and Additional Service • Supports DiSEqC1.0/DiSEqC 1.2, 13/18V, 0/12V, 0/22KHz Tone • 2-SCART(TV,VCR) Connectors & 1-RCA(CVBS,L,R) •...
  • Page 5 TECHNICAL SPECIFICATIONS Transmission Standards : DVB, MPEG2 1. Tuner & Demodulator LNB IF input 1 x F Type, IEC169-24, Female LNB IF loop through output 1 x F Type, IEC169-24, Female Input Frequency Range 950MHz to 2150MHz RF input Signal Level -25 ~ -65 dBm RF impedance 75 ohms...
  • Page 6 4. MEMORY FLASH MEMORY 2 Mbytes SDRAM 8 Mbytes EEPROM 8 Kbytes 5. RF Modulator TV Standard PAL G/I/K Selectable by Menu Setting Audio Output Mono with Volume Control Preset Channel CH 38(or TBD). Software changeable by Menu Screen 6. Power Supply Input Voltage Range 90Vac ~ 240Vac(SMPS) Input Frequency Range...
  • Page 7 Cvbs ground Cvbs ground CVBS out CVBS out CVBS in Ground Ground 8. Serial(RS-232) Connector PIN No. Signal Name RXD(Receive Data) TXD(Transmit Data) Ground 2pin 2pin 3pin 3pin 5pin 5pin 9-Pin Male Type 9-Pin Male Type 9. Physical Specification & Environmental Condition Weight 2.0 KG Size(WxHxD)
  • Page 8 10. REAR Panel (Back View) AC IN RF-MOD SCART TV/VCR DIGITAL AUDIO VIDEO TV OUT CVBS IF IN 0/12V VCR IN/OUT LOOP OUT RS-232 S/PDIF...

  • Page 9: Trouble Shooting

    4. Trouble Shooting 4-1. Apperance (Exterior) Test Check the condition of install, joining of connectors, break or bend of PCB, cold-soldering or Short of components and problem of part ,etc. 4-2. Power Test 5V Checking to L(910,905,906) 3.3V Checking to L(909,907,908) 30V Checking to L901 23V Checking to L902 12V Checking to L903...
  • Page 10 4-3-1. Check STI5518 Clock. 27Mhz ? Check point : U301 Pin 120 or R310 or R309. 81Mhz ? Check point : U301 Pin 118 or TP301 120 MHz ? Check point : U402 Pin 38 Failure Causes and Solution. If the 27Mhz is acting unstably, Check the SCO and U402(SDRAM) and U301(STI5518) is damaged or not. If you are firm belief of damage for the device, then replace the device.
  • Page 11 4-3-2. Test for Flash Memory RESET ? Check Point : U301 Pin 124 CE ? Check Point : U401 Pin 26 Failure Causes and Solution If the set do not operating correctly, the chip select pin and the reset pin of STI5518 must be checked. And if these signal are not acting like above figure, then check the soldering state of U301, U401 and RA3xx.
  • Page 12 MCLK ? Check Point : U301 Pin 55 LRCLK ? Check Point : U301 Pin 56 SPDIF ? Check Point : U301 Pin 57 Failure Causes and Solution If the Audio Main CLK MCLK(2.048Mhz ~12.8Mhz) is acting unstably, check the soldering state of STI5518. And check the oscillator U304 is generating 27 Mhz clock.
  • Page 13 4-4-2. SCART Controller STV6412 BLUE ? Check Point : U301 Pin 25 GREEN ? Check Point : U301 Pin 26 RED ? Check Point : U301 Pin 27 Check Point : U301 Pin 33...
  • Page 14 Check Point : U301 Pin 32 CVBS ? Check Point : U301 Pin 34 Failure Causes and Solution If the video signal is not operating correctly, you should check R314, R315(18 Khom). And you may try to check the net concerning to B, G, R, Y, C, CVBS on R501, R503, R505, R507, R509 and R511. When you had finished checking the above net or device and all these are OK, STI5518 maybe damaged.
  • Page 15 4-4-3. Audio DAC AK4351VT AOUTL ? Check Point : U502 Pin 11 AOUTR ? Check Pont : U502 Pin 10 Failure Causes and Solution If there are no audio output, you should check the input signal LRCLK, SCLK, SDTA and MCLK of Audio DAC U502. And you may try to check the net concerning to audio L, R on R513, R514 and pin 11, 13 of U501.
  • Page 16 In case of Vert Polarity ? Check Point : R125 LNBA ? Check Point : L106, (13V) Failure Causes and Solution If there’ s no 13V or 18V on the output connector of Tuner U101, you should check High(3.3V)/low(0V) state of R121. And this is properly high then check the Q107, U105 and Q109 respectively.
  • Page 17 4-5-2. 22Khz Control through , BCLK and ERROROUT control signal 22Khz ? Check Point : R127 22Khz ON(L) / OFF(H) ? Check Point : R128 CH_CLK ? Check Pont : RA101 Pin 4 ERROROUT ? Check Point : RA101 Pin 1 Failure Causes and Solution If there’...
  • Page 18 EM314S-IT210 STRONG MODEL 2002-3-4 BOM VER 1.2 K1 MOLD RF MODULATOR S/PDIF 1. MAN PCB ASS'Y (FTA Only) 1-1. SMD Item Quantity Reference Part Number Vendor CORD Remark 30 L101,L102,L103,L104,L105,L301, FCM2012C-101 TAI-Tech Ferrite Chip Bead, 100 ohm ± 25%, 600mA(max)
  • Page 19 C309,C310,C311,C312 10 C101,C102,C103,C303,C522,C523, CS1608X7R102J500NR SAMWHA I2203-005662 Chip Ceramic, 1608 Size, 1000pF C524,C525,C526,C527 6 C502,C505,C508,C511,C514,C517 CS1608C0G560J500NR SAMWHA Chip Ceramic, 1608 Size, 56pF I2203-001071 1 C104 CS1608C0G220J500NR SAMWHA Chip Ceramic, 1608 Size, 22pF I2203-006001 6 C503,C506,C509,C512,C515,C518 CS1608C0G180J500NR SAMWHA Chip Ceramic, 1608 Size, 18pF I2203-002354 RA314,RA315,RA361 CN 164 472 JT...
  • Page 20 R523,R533,R543 6 R531,R532,R540,R541,R547,R548 CR 1/16 471 JT HAN RYUK I2007-000077 Chip Resistor, 1608 Size, 470 Ohm 5% 11 R140,R303,R513,R514,R529,R552, CR 1/16 221 JT HAN RYUK Chip Resistor, 1608 Size, 220 Ohm 5% I2007-000075 R553,R554,R561,R562,R563 2 R579,R580 CR 1/16 151 JT HAN RYUK Chip Resistor, 1608 Size, 150 Ohm 5% I2007-000402...
  • Page 21 CE904 16 CE301,CE302,CE304,CE306,CE307, RSM/T 10uF/25V-5*7*5 DAEWOO I2401-001077 C-AL ; 10uF/25V-5*7*5, FORMING CUT TYPE CE401,CE402,CE504,CE505,CE506, CE507,CE512,CE515,CE516,CE519, CE524 8 CE513,CE514,CE517,CE518,CE520, 4.7uF, 20%, 25V, 3.5X5, 5 DAEWOO C-AL ; 4.7uF, 20%, 25V, GP, TP, 3.5X5, 5 I2401-002414 CE521,CE522,CE523 3 CE107,CE501,CE502 RSM/T 1uF, 20%, 50V, 5X11,5mm DAEWOO C-AL ;...
  • Page 22 I3710-001567 4. SMPS Item Div Quantity Reference Part Number Vendor CORD Remark ass'y MUREX Low cost SMPS 5.Etc (Remocon ASS'Y) Item 구분 Quantity Reference Part Number Vendor CORD Remark ass'y 1 Strong Remocon ARD314SSTR01 Black Color ass'y 2 BATTERY A-BD00000001...
  • Page 23 LED1 LED2 LED3 GREEN YELLOW 2N3904 2N3904 2N3904 CON1 2N3904 KPT1105 HEADER 12 TSOP1238 0.1uF 47uF/16V STRONG Title FRONT CIRCUIT DIAGRAM Size Document Number Date: Monday, April 29, 2002 Sheet...
  • Page 24 910 1/10W 1000pF 14/18V Q108 KN3904S R121 Q111 Q109 LNBP_EN R127 KN3904S KN3904S R126 C104 R117 R141 22pF R128 STRONG Q112 Title 22KHz_EN TUNER & POWER INTERFACE CIRCUIT DIAGRAM KN3904S 120 1/10W Size Document Number Date: Monday, April 29, 2002 Sheet...
  • Page 25 BC322 SD_nCS1 FNT5 0.1uF SD_nCS0 FNT6 74HC04 FNT7 RA313 12V_ON/OFF SCLK SDATA C304 C307 MCLK 0.01uF 0.01uF LRCLK SD_DATA[15..0] R324 SPDIF SD_ADDR[13..0] C305 C306 0.01uF 0.01uF STRONG Title CPU CIRCUIT DIAGRAM Size Document Number Date: Monday, April 29, 2002 Sheet...
  • Page 26 BC405 BC406 BC407 BC408 BC602 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF CON551 0.1uF ST-20 Connect Interface R601 CE402 SPDIF 10uF/25V TOTX178A STRONG Title S/PDIF Output MEMORY & INTERFACE CIRCUITS SDRAM Size Document Number Date: Monday, April 29, 2002 Sheet...
  • Page 27 2.0 mm Pitch R573 L515 R577 4.7K FCM2012C-101 JP504 R574 4.7K 1/10W Q504 12V_ON/OFF BC521 Q506 KN3904S CE525 KN3904S R578 R575 47uF/50V 0.1uF/50V RFMOD_CTRL STRONG Title 2250-10P-DS-T(Dummy) SCART INTERFACE CIRCUIT DIAGRAM Size Document Number Date: Monday, April 29, 2002 Sheet...
  • Page 28 BSTB+ AUDIOIN MODB+ VIDEOIN RMUP74055WT (Samsung) JP51 HSM-3052MPY 2250-10S-DS-T 2.0mm PITCH JP52 2250-10S-DS-T(DUMMY) Title RF MODULATOR SUB PCB Size Document Number Date: Monday, April 29, 2002 Sheet...