Strong SRT4155Evolution User manual

Settop-Box
Service Manual
Model : SRT4155Evolution

CONTENTS INDEX
1. Block Diagram ……………………………………………………. 3 page
2. Features .…………………………………………………………… 4 page
3. Technical Specifications ……………………………………………. 5~8 page
4. Trouble Shooting…………………………………………………….. 9~17 page
5. Bill of Materials List………………………………………………… 18~22 page
6. Circuit Drawing……………………………………………………… 23~32 page
6-1. Main / Front PCB Board
6-2. SMPS PCB Board

1. BLOCK DIAGRAM
SYSTEM ADDR & DATA BUS
AC IN : 90 ~ 240Vac / Max 40W
LNB
CVBS
RGB
SHARP QPSK
CI INTERFACE
CPU & MPEG
SMPS
(3.3V,5V,
7V,12V,
22V,30V)
2 -SLOT
PCMCIA
SDRAM MEM.
(K4S641632E-TC60)
FLASH MEM.
(TE28F160C3TA90)
FRONT
(7-KEYs, LEDs,
IR Reciever)
SERIAL
INTERFACE
(ST3232CD)
SCART
CONT.
(STV6412)
TV SCART
VCR SCART
4 -RCA
(CVBS,L,R,12V)
RF MODULATOR
(RMUP74055W
T
)
A-DAC
(AK4351)
LNBP &
22K CONT.
OVER
CURRENT
PROTECTION
S/PDIF OUT
(TOTX178)
(BS2F7VZ0184)

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)
• Multi-language Fuction (Menu, Audio)
• Last Channel Memory
• OSD: Transparency & Blending, 256 Palette Colors
• 7 Front Panel Buttons & 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
• 3Operation 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 by VBI
• 4900 Channels Memory
•Max. 12 Characters of Channel Name Length
•PLL RF Modulator UHF 21~69 with PAL G/I/K (Optional)
• Digital Audio Output (S/PDIF)
•Dolby Digital Audio (Optional)
•Support Games (Tetris, Snake etc)

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
LNB Power 13.5 / 18.5Vdc +/-5%,0.5Amax
Overload Protected
LNB tone switch 22KHz +/-2KHz, 0.6Vpp +/-0.2V
DiSEqC Version1.2,Tone burst A/B
Demodulation QPSK
Symbol Rate 2 ~ 45 Msps, SCPC/MCPC
2. MPEG
Transport Stream MPEG-2 TS Specification(ISO/IEC 13818)
Input Rate Max. 60Mbit/s
VIDEO MPEG-2 MP@ML
AUDIO MPEG-1/2 Audio layer 1,2
Aspect Ratio 4:3, 16:9
Video Resolution 720 x 576(PAL), 720 x 480(NTSC)
Audio mode Stereo, Dual channel, Joint stereo, Mono
Audio Sampling Frequency 32/44.1/48KHz
3. A/V & Data In/Out
TV SCART RGB, CVBS, L, R out
VCR SCART CVBS, L, R out
RGB, CVBS, L, R in
RCA JACK CVBS(Yellow)
Audio L, R(White, Red)
0/12Vdc out(Black)
TOSLINK Digital Audio Output(S/PDIF)
Serial Port RS232C D-Sub MaleType

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 50Hz ~ 60Hz
Power Consumption Max 40W
Standby Power Consumption <= 6.5W
Protection Separate Internal Fuse
The input shall the lighting protection
7. SCART Socket
PIN No.
TV AUX
1Audio out Right Audio out Right
2-Audio in Right
3Audio out Left Audio out Left
4Audio ground Audio ground
5Blue ground Blue ground
6-Audio in Left-
7BLUE out BLUE in
8Function control out Function control in
9Green ground Green ground
10 --
11 GREEN out GREEN in
12 --
13 Red ground Red ground
14 Fast blanking ground Fast blanking ground
15 RED out RED in
16 Fast blanking out Fast blanking in
17 Cvbs ground Cvbs ground

18 Cvbs ground Cvbs ground
19 CVBS out CVBS out
20 -CVBS in
21 Ground Ground
8. Serial(RS-232) Connector
PIN No. Signal Name
1-
2RXD(Receive Data)
3TXD(Transmit Data)
4-
5Ground
6-
7-
8-
9-
S P
E C
T
9-Pin Male Type 9-Pin Male Type
9. Physical Specification & Environmental Condition
Weight 2.0 KG
Size(WxHxD) 280mm x 55mm x245mm
Operating Temperature 0 °C x 40 °C
Storage Temperature -10 °C x 80 °C
Operating Humidity Range 10~85% RH, Non-condensing
Storage Humidity Range 5~90% RH, Non-condensing
2pin
3pin
5pin
2pin
3pin
5pin

10. REAR Panel (Back View)
AC IN
RF-MOD.
DIGITAL SCART ANT TV/VCR
AUDIO VIDEO
RCVBS
IF IN
L 0/12V
LOOP OUT RS-232 S/PDIF
TV OUT
VCR IN/OUT

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
7V Checking to L904
4-3. System Test
Check STI5518 CPU or Flash Momory TE28F160C3T is working or not.
Check Message Display and Execution of Hyper Terminal in PC.
* Configuration of Hyper Terminal
Baud rate : 115,200 bps
Data bit : 8 bits
Parity bit : none
Stop bit : 1
Control : none
4-3-1. Check STI5518 Clock
4-3-2. Test for Flash Memory
4-4. MPEG and Audio Video Test
Check the whole process from MPEG Decoder (STI5518) and Audio/Video SWITCH (STV6412) of R, G, B, Y, C, CVBS
Also Check the Audio signal (U502(AK4351VT)
Output port (SCART, Phone Jack, RF-Modulator)
4-4-1. STI5518 (MPEG-2 Audio/Video Decoder)
4-4-2. SCART Controller STV6412
4-4-3. Audio DAC (U502(AK4351VT))
4-5. Channel Test
4-5-1. When “NO SIGNAL”Message display.
4-5-1-1. U106 (KA317 Regulator) ?Check the Voltage 21V ~ 24V at Pin 3.
Check the Voltage 13V(Vert) or 18V(Horz) at R125.
4-5-1-2. I2C Control Signal
4-5-2. 22Khz Control through , TS-Data and Data Error control signal
4-6. Common Interface Test

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.
If the clock 81Mhz on TP301, 120Mhz on Pin-38 of U402 is not generated from inside of the chip, Please check
the soldering state of U301.

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.
Before checking these signal you must check the power for U301, U401 etc. Check 3.3V on L301, L302, L304 and check
2.5V on L303, L305, L306 respectively.
4-4-1. STI5518(MPEG-2 Audio/Video Decoder)
SCLK?
Check point : U301 Pin 51
SDATA ?
Check Point : U301 Pin 52

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. If STI5518 and oscillator are OK, then check the Audio DAC U502.
And all these are OK, STI5518 maybe damaged. Then you can try to replace the STI5518.

4-4-2. SCART Controller STV6412
BLUE ?
Check Point : U301 Pin 25
GREEN ?
Check Point : U301 Pin 26
RED ?
Check Point : U301 Pin 27
C ?
Check Point : U301 Pin 33

Y ?
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.
Then you can try to replace the STI5518.

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.
When you had finished checking the above net or device and all these are OK, Audio DAC maybe damaged.
Then you can try to replace the Audio DAC.
4-5. Channel Test
4-5-1. When “NO SIGNAL”is displayed.
Check the RF cable is connected to LNB IN connector of rear panel. Then check U105(KA317 Regulator) pin 3
is powered between 21V to 24V. And check the voltage on L101 ~ L104 is proper level. When you had finished
checking the above net or device and all these are OK, Tuner maybe have problem. Replace the Tuner.
In case of Horz Polarity ?
Check Pont : R125
LNBA?
Check Point : L106, (18V)

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.
2. I2C Control Signal
SCL_NIM ?
Check Pont : U301 Pin 20
SDA_NIM ?
Check Point : U301 Pin 21
Failure Causes and Solution
If there’s no or different signal compare to above picture on I2C line, check the associated net. Try to remove serial resistor
R205, R206, R351, R352, R549, R550, R581 and R582, then if you could find what device has problem.

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’s no 22 KHz, check the Pin 12 of Tuner and associated net.

2002-3-4
K1 MOLD RF MODULATOR BOM VER 1.2
S/PDIF
1. MAN PCB ASS'Y (FTA Only)
Item Div Quantity Reference Part Number Vendor CORD Remark
1SMD 30 L101,L102,L103,L104,L105,L301, FCM2012C-101 TAI-Tech I3301-001375 Ferrite Chip Bead, 100 ohm ± 25%, 600mA(max)
L302,L303,L304,L305,L306,L401, 2nd:Expan, ECFB201209G600T, 60 ohm , 600mA(max)
L451,L452,L453,L507,L509,L512,
L514,L515,L603,L901,L903,L904,
L905,L906,L907,L908,L909,L910
2SMD 2 L106,L902 ECFB201209P601 Expan I3301-001379 Ferrite Chip Bead, 600 ohm, 1000mA(max)
3SMD 6 L501,L502,L503,L504,L505,L506 FCI2012-150K TAI-Tech I2703-100507 Ferrite Chip Inductor, 15uH ± 10%
4SMD 6BC101,BC521,BC901,BC902,BC903, CS2012Y5V104J500NR SAMWHA I2203-000192 Chip Ceramic, 2012 Size, 0.1uF/50V
BC904
5SMD 71 BC102,BC103,BC104,BC105,BC106, CS1608Y5V104Z500NR SAMWHA
I2203-006000 Chip Ceramic, 1608 Size, 0.1uF
BC108,BC215,BC301,BC302,BC303,
BC304,BC305,BC306,BC307,BC308,
BC309,BC310,BC311,BC312,BC313,
BC314,BC315,BC317,BC319,BC320,
BC321,BC322,BC351,BC401,BC402,
BC403,BC404,BC405,BC406,BC407,
BC408,BC410,BC411,BC451,BC452,
BC453,BC454,BC501,BC502,BC503,
BC504,BC505,BC506,BC507,BC508,
BC509,BC510,BC511,BC512,BC515,
BC516,BC517,BC518,BC519,BC520,
BC522,BC523,BC602,BC905,BC906,
BC907,BC908,BC909,BC910,BC911,
BC912
7SMD 10 C105,C304,C305,C306,C307,C308, CS1608Y5V103J500NR SAMWHA
I2203-002719 Chip Ceramic, 1608 Size, 0.01uF
1-1. SMD
EM314S-IT210
STRONG MODEL

C309,C310,C311,C312
8SMD 10 C101,C102,C103,C303,C522,C523, CS1608X7R102J500NR SAMWHA I2203-005662 Chip Ceramic, 1608 Size, 1000pF
C524,C525,C526,C527
9SMD 6 C502,C505,C508,C511,C514,C517 CS1608C0G560J500NR SAMWHA I2203-001071 Chip Ceramic, 1608 Size, 56pF
10 SMD 1 C104 CS1608C0G220J500NR SAMWHA I2203-006001 Chip Ceramic, 1608 Size, 22pF
11 SMD 6 C503,C506,C509,C512,C515,C518 CS1608C0G180J500NR SAMWHA I2203-002354 Chip Ceramic, 1608 Size, 18pF
12 SMD 3RA314,RA315,RA361 CN 164 472 JT HAN RYUK I2011-001280 Chip Array Resistor, 4.7 Kohm
13 SMD 17 RA104,RA105,RA106,RA302,RA303, CN 164 330 JT HAN RYUK
I2011-001282 Chip Array Resistor, 33 Ohm
RA304,RA305,RA306,RA307,RA308,
RA309,RA310,RA311,RA312,RA313,
RA316,RA317
14 SMD 5 R102,R103,R119,R120,R577 CR 1/10 472 JT HAN RYUK I2007-000872 Chip Resistor, 2012 Size, 4.7 Kohm 5%
15 SMD 1 R123 CR 1/10 122 JT HAN RYUK I2007-000221 Chip Resistor, 2012 Size, 1.2 Kohm 5%
16 SMD 1 R131 CR 1/10 102 JT HAN RYUK I2007-000468 Chip Resistor, 2012 Size, 1.0 Kohm 5%
17 SMD 2 R110,R124 CR 1/10 911 JT HAN RYUK I2007-001239 Chip Resistor, 2012 Size, 910 Ohm 5%
18 SMD 1 R901 CR 1/10 331 JT HAN RYUK I2007-000766 Chip Resistor, 2012 Size, 330 Ohm 5%
19 SMD 2 R113,R122 CR 1/10 241 JT HAN RYUK I2007-040210 Chip Resistor, 2012 Size, 240 Ohm 5%
20 SMD 1 R126 CR 1/10 121 JT HAN RYUK I2007-000023 Chip Resistor, 2012 Size, 120 Ohm 5%
21 SMD 12 R530,R534,R535,R536,R537,R539, CR 1/10 750 JT HAN RYUK I2007-001166 Chip Resistor, 2012 Size, 75 Ohm 5%
R555,R556,R557,R558,R567,R568
22 SMD 2 R314,R315 CR 1/16 1802 FT HAN RYUK I2007-000455 Chip Resistor, 1608 Size, 18 Kohm 1%
23 SMD 6 R501,R503,R505,R507,R509,R511 CR 1/16 3000 FT HAN RYUK I2007-040212 Chip Resistor, 1608 Size, 300 Ohm 1%
24 SMD 7 R135,R527,R528,R544,R545,R559, CR 1/16 473 JT HAN RYUK I2007-000939 Chip Resistor, 1608 Size, 47 Kohm 5%
R560
25 SMD 2 R517,R518 CR 1/16 273 JT HAN RYUK I2007-000129 Chip Resistor, 1608 Size, 27 Kohm 5%
26 SMD 1 R538 CR 1/16 223 JT HAN RYUK I2007-000094 Chip Resistor, 1608 Size, 22 Kohm 5%
27 SMD 1 R134 CR 1/16 153 JT HAN RYUK I2007-000092 Chip Resistor, 1608 Size, 15 Kohm 5%
28 SMD 2 R565,R566 CR 1/16 123 JT HAN RYUK I2007-000091 Chip Resistor, 1608 Size, 12 Kohm 5%
29 SMD 26 R101,R104,R109,R111,R112,R114, CR 1/16 103 JT HAN RYUK I2007-000090 Chip Resistor, 1608 Size, 10 Kohm 5%
R117,R118,R121,R125,R127,R128,
R129,R141,R307,R311,R361,R362,
R365,R520,R524,R546,R574,R575,
R576,R578
30 SMD 3 R542,R570,R571 CR 1/16 682 JT HAN RYUK I2007-000087 Chip Resistor, 1608 Size, 6.8 Kohm 5%
31 SMD 13 R268,R269,R301,R302,R304,R316, CR 1/16 472 JT HAN RYUK I2007-000084 Chip Resistor, 1608 Size, 4.7 Kohm 5%
R317,R401,R402,R403,R410,R411,
R573
32 SMD 9 R133,R312,R515,R516,R521,R522, CR 1/16 102 JT HAN RYUK I2007-000078 Chip Resistor, 1608 Size, 1.0 Kohm 5%

R523,R533,R543
33 SMD 6 R531,R532,R540,R541,R547,R548 CR 1/16 471 JT HAN RYUK I2007-000077 Chip Resistor, 1608 Size, 470 Ohm 5%
34 SMD 11 R140,R303,R513,R514,R529,R552, CR 1/16 221 JT HAN RYUK
I2007-000075 Chip Resistor, 1608 Size, 220 Ohm 5%
R553,R554,R561,R562,R563
35 SMD 2 R579,R580 CR 1/16 151 JT HAN RYUK I2007-000402 Chip Resistor, 1608 Size, 150 Ohm 5%
36 SMD 3 R140,R581,R582 CR 1/16 101 JT HAN RYUK I2007-000074 Chip Resistor, 1608 Size, 100 Ohm 5%
37 SMD 2 R363,R364 CR 1/16 750 JT HAN RYUK I2007-001167 Chip Resistor, 1608 Size, 75 Ohm 5%
38 SMD 12 R107,R108,R305,R309,R310,R313, CR 1/16 330 JT HAN RYUK
I2007-000113 Chip Resistor, 1608 Size, 33 Ohm 5%
R324,R329,R351,R352,R549,R550
39 SMD 14 R138,R303,R319,R320,R322,R326, CR 1/16 000 JT HAN RYUK
I2007-000070 Chip Resistor, 1608 Size, 0 Ohm 5%
R405,R407,R413,R425,R519,R564,
R572,R601
40 SMD 1 Q501 MMBT2222A Fairchild I0501-002283 TR-Chip, NPN, SOT-23, KST2222A-MTF(Fairchild), KN2222S(KEC)
41 SMD 13 Q102,Q104,Q106,Q108,Q109,Q110, KST3904-MTF Fairchild I0501-002275 TR-Chip, NPN, SOT-23, KN3904S(KEC)
Q111,Q112,Q113,Q504,Q506,Q507,
Q508
42 SMD 1 U103 AMS1117CD-3.3 AMS I1203-001921 IC-LDO, 3.3V, TO-252, 2nd:LD1117DT33(ST)
43 SMD 1 U301 STi5518BVB ST I0902-001289 IC-STB Decoder, PQFP-208
44 SMD 1 U303 MM74HC14M Fairchild I0801-003011 IC-CMOS Logic(Schmitt Trigger), SOIC-14
45 SMD 1U305 MM74HC04M Fairchild
I0801-002385 IC-CMOS Logic, SOIC-14
46 SMD 1 U351 AT24C64N-10SC-2.7 Atmel IMD13-00125D IC-EEPROM, 3.3V, 64K, SOIC-8, 2nd:M24C64WMN6
47 SMD 1 U401 TE28F160C3TA90 Intel I1107-001164 IC-Flash, 3.3V, 1M*16, 90ns, TSOP-48
48 SMD 1 U402 K4S641632E-TC60 Samsung I1105-001321 IC-SDRAM, 3.3V, 1M*16*4Banks, 125MHz
2nd:HY57V641620HGT-6, 3rd:IS42S16400-7T
49 SMD 1 U403 74LCX374MTC Fairchild I0801-003012 IC-CMOS Logic, TSSOP-20
50 SMD 1 U451 ST3232CD Sipex I1006-000008 IC-Interface, 3.3V, SOIC-16
51 SMD 1 U501 STV6412A ST I1001-001024 IC-SCART Interface, TQFP-64
52 SMD 1 U502 AK4351VT Asahi-Kasei I1204-003510 IC-Audio DAC, TSSOP-16
53 SMD 1 U207 MM74HC125M Fairchild I0801-003020 IC-CMOS Logic, SOIC-14
54 PCB 1Main PCB IT464S-R1.3, 2002.02.28. PCB-MAIN ;IT464S-R1.3 ,VER R1.3, 2002.02.28, 2-Layer
Item Div Quantity Reference Part Number Vendor CORD Remark
1DIP 8 CE102,CE103,CE104,CE106,CE909, RSM/T 220uF, 20%, 10V,6X11.5mm DAEWOO I2401-002383 C-AL ; 220uF, 20%, 10V, GP, TP, 6X11.5mm
CE910,CE911,CE912
2DIP 3 CE905,CE906,CE908 RSM/T 100uF, 20%, 25V,6X11,5mm DAEWOO I2401-001078 C-AL ; 100uF, 20%, 25V, GP, TP, 6X11, 5
3DIP 11 CE101,CE303,CE503,CE508,CE509, RSS/T 47uF, 20%, 50V,6X11, 5mm DAEWOO I2401-002438 C-AL ; 47uF, 20%, 50V, GP, TP, 6X11, 5mm
CE525,CE526,CE901,CE902,CE903,
Auto/Hand inert
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