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Service Manual
(SRT4355)
Contents
1. Technical specifications
2. Block Diagram
3. Circuit Drawing
4. List of Error codes
5 Trouble Shooting
3.1 Trouble shooting
3.2 Check point about badness STB
6. Materials list
6.1 Main PCB materials list
6.2 Front PCB materials list
7. Software download instructions(OTA and PC download)
7.1 Program Download
7.2 System Upgrade
8. Specification of required cables for software download
9. Data Sheet
1. Technical specifications
1.1. Conditional Access Interface
PCMCIA
2. Slot(type I or type II)
DVB Common Interface Standard
(Viaccess, Nagra Vision, Conax, Cryptoworks, Irdeto, ASTON)
1.2. Tuner & Channel
Input Connector F-type, IEC169-24, Female
Frequency Range 950MHz to 2150MHz
Input Impedance 75ohm unbalanced
Signal Level -25 to 65dBm
IF Bandwidth 55MHz
LNB Power Vertical: +13V Horizontal: +18V Current: Max, 400mA
Polarization 13V/18V or Skew Control
22kHz Tone Frequency: 22±4kHz Amplitude: 0.6±0.2V
DiSEqC control Version (1.0 & 1.2) Compatible
Demodulation QPSK
Input Symbol Rate 2-45 Ms/s
FEC Decoder Convolution Code Rate 1/2, 2/3, 3/4, 5/6, and 7/8
With Constraint Length K=7
1.3. System & Memory
Main Processor L64108(LSI-LOGIC)
Flash Memort 1Mbyte
Program Dram 2Mbyte
EEPROM 8kbyte
Channel Memory Digital Channel: 3000
(Total : 3500) Analog Channel: 500
Multi-Satellite UP to 64
Multi-Language Menu English/Spanish/French/Italian/German/Portuguese
Front 7 keys, 4-digit 7segment display
Remote Controller 30-31 keys, IR Remote Control
1.4. MPEG Transport Stream & A/V Decoding
Transport Stream MPEG-2 ISO/IEC 13818 Transport Stream Specification
Profile Level MPEG-2 MP@ML
Input Rate Max. 40Mbit/s
Aspect Ratio 4:3, 16:9
Frame Rate 25Hz for PAL, 30Hz for NTSC
Video Resolution 720x576(PAL),720x480(NTSC)
Teletext Through VBI
Audio Decoding MPEG/MusiCam Layer I & II
Audio Mode Single channel/Dual channel joint stereo/Stereo
Frequency Response 20~20kHz, <+/- 2dB
60Hz~18kHz <+/- 0.5dB
Sampling Rate 32, 44.1, 48kHz
1.5. A/V & Date In/Out
TV Scart Output RGB, CVBS, L, R Output with Volume control
VCR Scart In/Out CVBS, L, R In
CVBS, L, R Out
RCA Output CVBS, L, R Output(Yellow, White, Red Hack) with Volume Control
0V/12V Output RCA Jack Output(Black Jack), Max. 150mA
Data Interface RS-232, Bit Rate: 115200baud
Connector: 9-pin D-sub type
1.6. RF-Modulator
RF-Connector 75w IEC169-2, Male/Female
Frequency 470MHz to 860MHz
Output Channel CH 21-69 for the Demodulator
TV Standard PAL B/G/I/D/K Selectable by Menu Setting
Audio Output Mono with Volume Control
Preset Channel CH 40 (or TBD). Soft ware changeable by Menu screen
1.7. Power Supply
Input Voltage AC90 to 260V, 50Hz/60Hz
Type PWM Regulator
Power Consumption Max. 40W(without Positioner)
Stand-by Power <= 10W
Protection Separate Internal Fuse
The input shall have the lighting protection
1.8. Physical Specification
Size (WxHxD) 280x55x235mm
Excluding the foot. Foot height is 10mm.
Weight 2.0Kg
1.9. Environmental Condition
Operating Temperature 0~40C
Storage Temperature -10C~+50C
Operating Humidity Range 10~85% RH, Non-condensing
Storage Humidity Range 5~90% RH, Non-condensing
2. Block Diagram
CH_VALID,
CH_CLK,
CH_STRT,
PTO[0..7] 74244
74244 Block Diagram
QPSK NIM 74244 Common
(TBMU30311) Interface
74244
74244 8-bit
microcontroller BD[0..7] Front Panel
TS_VALID, (AT89C51) I2C(SDL,SCA)
RS-232 TS_CLK,
(DS232AS) TS[0..7]
SCL,
SDA SCL,SDA
TTXDATA, TTXREQ RCA JACK
TXD,RXD
EEPROM AVD[0..7] YCRCB[0..7] CVBS
(AT24C64) RED, TV SCART
MPEG2 Transport with Embeded Audio/Video VSYNC,HSYNC Video GREEN,Audio/Video
MIPS CPU AREQ,AVALID Decoder Encoder BLUE Switch
(L64108) ,VREQ,VVALID (L64005) (BT864) (CXA2126) VIDEO SCART
VCXO
(27MHz) LRCLK,BICK,
PCMDATA, L_AUDIO,
EDATAEADDR BD[0..15] BA[0..9] SBD[0..15] 005_ACLK
SBA[0..8] R_AUDIO RF_Audio, RF Modulator
[0..15] [1..20] RF_Video
Audio LEFT_A, (RMUP74055)
DAC RIGHT_A
SMPS Flash ROM DRAM 2MByte SDRAM 2MByte (AK4323)
1MByte (KM416V1204) (KM416S1020)
(SST39VF800Q)
A B C D E
ROM_VPP
R59 U1
ROM_WP for intel rom
NC(10k) CS_008N 136
145 CS_008 60
RESETN RESET AREQ AREQN
127 58
DSSCK1N AS AVALID AVALID
128 54
DSACK0N DS AVD7 AVD7
129 53
R/WN WR AVD6 AVD6
55 52
OE AVD5 AVD5
3.3V 131 51
RA1 1K SIZE1 AVD4 AVD4
13 130 50
Vpp U2 SIZE0 AVD3 AVD3
1 8 14 9 133 49
WP ADDR19 DSACK1 AVD2 AVD2 3.3V
2 7 R55 132 48 3.3V
DSACK0 AVD1 AVD1
3 6 0 27 12 47
GND RESET AVD0 AVD0
4 5 46 47 106 56
GND BYTE ADDR23 AVERR ERRORN
37 11 105 59
VCC WE ADDR22 VREQ VREQN
4 28 104 57 4
OE ADDR21 VVALID VVALID R2
C60 15 26 EADDR20 103
D3 RY/BY CE 16 102 ADDR20
Q11 104 EADDR19 620
5V NC (RLS4148) ADDR18 17 101 ADDR19 3.3V
3.3VS NC EADDR18 R5 U39
R25 KTA1273 ADDR17 48 100 ADDR18 147
EADDR17 6.2K(F)
45 ADDR16 1 99 ADDR17 ACLK 236 1 14
EDATA15 EADDR16 PWMOUT0 VCOOUT VDD
43 DATA15 ADDR15 2 96 ADDR16 AVDD 235 R12
0 EDATA14 EADDR15 16.9K 1%
R24 R8 41 DATA14 ADDR14 3 95 ADDR15 AVSS 234 8 7
EDATA13 EADDR14 OUT GND
39 DATA13 ADDR13 4 94 ADDR14 IREF C12 C11
1K EDATA12 EADDR13
R9 36 DATA12 ADDR12 5 93 ADDR13 103 C1 C2
EDATA11 EADDR12 105 VCXO 27MHZ(DIP) 0.01uF
34 DATA11 ADDR11 6 90 ADDR12 51pF
1K EDATA10 EADDR11
32 DATA10 ADDR10 7 89 ADDR11 157
EDATA9 EADDR10
30 DATA9 ADDR9 8 88 ADDR10 STROBE 158
EDATA8 EADDR9
44 DATA8 ADDR8 18 87 ADDR9 AUTOFD 159
EDATA7 EADDR8
42 DATA7 ADDR7 19 86 ADDR8 INIT 160
EDATA6 EADDR7
Q10 40 DATA6 ADDR6 20 85 ADDR7 SELECTIN 171
EDATA5 EADDR6
38 DATA5 ADDR5 21 84 ADDR6 ACK/AUXV 172
DTC114 EDATA4 EADDR5 C3
35 DATA4 ADDR4 22 83 ADDR5 BUSY 173
EDATA3 EADDR4 (NC)15pF
33 DATA3 ADDR3 23 82 ADDR4 PERROR 174
EDATA2 EADDR3
31 DATA2 ADDR2 24 81 ADDR3 SELECT 175
EDATA1 EADDR2 4.7K U6
29 DATA1 ADDR1 25 80 ADDR2 FAULT 6 R13
EDATA0 EADDR1 R4
DATA0 ADDR0 79 ADDR1 OP_MODE2/PDATA_DIR 170 1 14
EADDR0 33 I1 VCC
ADDR0 PDATA7 169 2 13
EDATA[0..15] EDATA[0..15] Am29F800BT-120EC or,SST39VF800A-90-4C-EK 27MHZ O1 I6
126 PDATA6 168 3 12
EDATA15 I2 O6
TSOP48 125 DATA15 PDATA5 167 4 11
EDATA14 R3 O2 I5
3.3V 124 DATA14 PDATA4 166 5 10
EDATA13 33 I3 O5
123 DATA13 PDATA3 165 6 9
EDATA12 SYSCLK O3 I4
122 DATA12 PDATA2 164 7 8
EADDR0 EDATA11 GND O4
119 DATA11 PDATA1 163
EADDR1 EDATA10
118 DATA10 PDATA0 74LCX04M
EADDR2 EDATA9
117 DATA9 5V
EADDR3 EDATA8
114 DATA8
3.3V EDATA7
113 DATA7 230
8 1 EDATA6 TTXREQ
3 DATA6 TTXREQ 3
8
7
6
5
U5 EDATA5 112 229 R15
7 2 DATA5 TTXDATA TTXDATA
RA2 EDATA4 111 R14 3.3K
DS1811 6 3 DATA4
5V 10K EDATA3 110 3.3K
5 4 DATA3
EDATA2 109
DATA2
3
2
1
EDATA1 108 155
DATA1 SCL SCL
3.3V RA23 4.7K EDATA0 107 156
DATA0 SDA SDA
1
2
3
4
8 1 R23 137
7 2 138 BRQ
1K BGA
6 3 146 7 3.3V
BG SCLK 27MHz
5 4 8
SDET PWMOUT0 L1
C50 148
DMRQ R17 4.7K 10uH
0.1 144
RA3 4.7K DMAK
152 237 R18
CS_005N CS3 PLLVDD
CASCS 151 239 + E1
CS2 LP2 10
150 238 C10 C72 10/10
149 CS1 PLLAGND 240 C6 R16 C9
CS0n 102 104
CS0 PLLVSS 5V
NC 104 1K 104
R10 INTN4 143
M_FLASH_CTL INTR4
142 C8
3.3V 141 INTR3 36
INTN2 INTR2 ECLK 22p
INTN1 140 3 C7
INTR1 IDDTN
1
2
3
4
U4 139 233 152p
8 INTR0 ZTEST CLOSE TO CHIP RA4
R22 0 VCC
SDA 5 54MHz 20 10K
6 SDA 1 T1 MCLK 74
SCL SCL E0 SC_CLK1
2 5 73
R21 0 E1 OP_MODE1 SC_DETECT1
7 3 4 75
WC E2 C61 OP_MODE0 SC1-I/O 76
8
7
6
5
4 104 187 SC_VCC_EN1 71
GND 188 CTS1 SC_VPP_EN1 72
CTS0 SC_RST1 LNBP_OFF
2 AT24C64N-10SC-2.7 178 2
SOIC 183 RTS1 66
RTS0 SC_CLK0 22ON/OFF
184 65
DTR0 SC_DETECT0 POLARITY
189 67
29 DSR0 SC0-I/O 68
RXD2 RXD2 SC_VCC_EN0
186 63 R54
RXD1 RXD1 SC_VPP_EN0
185 64 EADDR3
RXD0 SC_RST0 ROM_WP
28 69 EADDR2
TXD2 TXD2 SC0_C4 nc(0 ohm)
177 70
TXD1 TXD1 SC0_C8
176 R56 EADDR1