Daewoo DSD-9251MAV Service Manual Download Page 22

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CIRCUIT OPERATION MANUAL

3) Color Bar CVBS, Y, C, signals

32.88

1.233

28.88

1.000

12.01

1.80

4.00

8.00

0.450

0.300

0.150

0.068

28.88

1.000

17.07

5.27

0.640

13.07

0.490

21.03

0.791

0.196

26.68

1.000

9.00

0.800

0.00

0.000

White

Yellow

Cyan

Green

Magenta

Red

Blue

Block

400

388

316

284

238

204

152

BLACK/BLANK

WHITE LEVEL

LEVEL

SYNC
IFVFI

Color Burst
(10 Cycles)

Maintain

300mV

Maintain

300mV

White

Yellow

Cyan

Green

Magenta

Red

Blue

Block

White

Yellow

Cyan

Green

Magenta

Red

Blue

Block

400

388

316

284

236

204

152

BLACK/BLANK LEVEL

SYNC LEVEL

BLANCK
LEVEL

Color Burs1
(10 Cycles)

WHITE LEVEL

CVBS, Y and C Waveform of Color Bar signals

Summary of Contents for DSD-9251MAV

Page 1: ...nce without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price List in Service Information Center http svc dwe co kr DAEWOO ELECTRONICS Corp June 2004 http svc dwe co kr Service Manual Digital Satellite Receiver MODEL DSD 9251MAV EAV DSD 9252MA EA ...

Page 2: ...GENERAL INFORMATION 2 CIRCUIT OPERATION MANUAL 7 FIXING ERRORS 28 BOM LIST 33 SCHEMATIC DIAGRAM 40 PARTS PLACEMENT ARRANGEMENT 53 1 CONTENTS ...

Page 3: ... function on Channel Management favorite move lock rename delete and sort User programmable Satellite Transponder information Automatic search for newly added transponder NIT search Stores up to 4000 channels Support software upgrading through RS 232C port Plug and play data transfer system DSR to DSR Individual channel volume saving function Timer function Automatic reserved channel moving system...

Page 4: ...s shall not be exposed to dripping or splashing and that no objects filled with liquids such as vaseds shall be placed on the apparatus UNPACKING 1 x Remote Control Unit RCU 2 x AAA battery option GENERAL OPERATION Throughout this manual you will notice that the operation of your Digital Satellite Receiver is based on a series of user friendly On Screen Display menus These menus will help you to g...

Page 5: ...he selected item in the menu screen or enters the Desired value in any input mode Returns to the previous menu or exit window Moves up down a page in the channel list Executes sort or deletion of satellite Pauses Resumes the screen picture Switches between TV and Radio mode Switches to the UHF Tuning mode Recall to the previous channel Shows information of the current channel Calls up the EPG Elec...

Page 6: ...oting 100 240V Power Input Optional function RF Modulator Optional function Connect to TV and VCR using a SCART cable Optic jack Optional function Connect Video to a TV using RCA jack Connect Audio L R to TV or Audio device Serial Connect to a PC for S W upgrade Loopthrough LNB IN Connect to Satellite Antenna 2 CI Slot for conditional access module CAM Changes the channel or moves to the previous ...

Page 7: ...in Level Resolution 720 x 576 pixels for PAL Aspect ratio 4 3 or 16 9 Audio format MPEG Layer I and II Channel Mode Stereo Mono Mode Audio Signal Sample Rate 32 44 1 48 Ksps Audio Signal bandwidth 15Hz 20KHz Bit Resolution 24 bits PCM for the audio sample Type SMPS Voltage Frequency 100 240V 50 60Hz Power Consumption 25W Video Audio Output RCA Scart Jack Video Input Scart Jack Optional Video Input...

Page 8: ...7 CIRCUIT OPERATION MANUAL 1 Block Diagram DSD 9251EAV Block Diagram ...

Page 9: ...1 0100 0000 K03 3 E8 H 03 H 0001 0111 1100 0000 K04 4 E8 H 04 H 0001 0111 0010 0000 K05 5 E8 H 05 H 0001 0111 1010 0000 K06 6 E8 H 06 H 0001 0111 0110 0000 K07 7 E8 H 07 H 0001 0111 1110 0000 K08 8 E8 H 08 H 0001 0111 0001 0000 K09 MENU E8 H 22 H 0001 0111 0100 0100 K10 EXIT E8 H 23 H 0001 0111 1100 0100 K11 VOL E8 H 13 H 0001 0111 1100 1000 K12 VOL E8 H 14 H 0001 0111 0010 1000 K13 E8 H 15 H 0001...

Page 10: ...1D 0 0x00 Pg UP 0x1C 1 0x01 3 0x14 2 0x02 4 0x13 3 0x03 MENU 0x22 4 0x04 EXIT 0x23 5 0x05 TV RADIO 0x0A 6 0x06 RECALL 0x20 7 0x07 INFO 0x21 8 0x08 EPG 0x24 9 0x09 UHF 0x26 0x15 SAT 0x10 TV AV 0x16 FREEZE 0x1E 0x12 red 0x27 AUDIO 0x0F green 0x28 OK 0x11 yellow 0x29 PR 0x17 blue 0x2A PR 0x18 ...

Page 11: ...mories 4 Banks Able to use Hardware DMUX input Serial and to support 32Pid Boosting 8 Level INT Supporting DMA and other multi PID 2 MPEG DMAs Serial IEEE 1394 Hardware transport strearn demux 2 Kbytes Instruction cache 2K Data cache and 2K SRAM OS Link 2 UART 1 I 2 C PIO 3 PWM Diagnostic controller and systems services SDAV interface Block move DMA ST20 CPU Interrupt controller EMI 2 SmartCard in...

Page 12: ...If this value is not appropriate the colors are not be seen on the screen or the screen will display broken features 4 PIO Structure Sti5518 supports PIO that back up 5 number of Ports 8bit as of PIO0 PIO1 PIO2 PIO3 and PIO4 Some ports are able to endow extra functions to PIO for flexible expansion in usage Following chart shows Alternative Function Pin of PIO PIO port 0 ASC0TxD or Sc1DataOut ASC0...

Page 13: ... data Latch data Transmit data Feature 7 I2 C Timing Chart 3 PIO Map PIO NAME I O Function Remarks PIO1_0 I2C_Data SSC0 I O PIO1_2 I2C_Clk O PIO1_3 NOTPGM_EN O L Flash program enable PIO1_4 SLOW_S W I H VCR Scart Input ON L VCR Scart Input OFF PIO1_5 RS232_Tx O PIO1_6 RS232_Rx I PIO2_7 KI1 I PIO3_0 COM0 O PIO3_1 COM1 O PIO3_2 COM2 O PIO3_3 COM3 O PIO3_4 COM4 O PIO3_5 Seg_clk K7 O PIO3_6 TriggerIN ...

Page 14: ...gh status and Key Scan Trigger IN PIO3_6 Trigger OUT PIO3_7 Used when debugging with DCU Tool REMOCON_IN PIO4_6 Recognize the REMOCON signal being sent from IR Sensor 5 Memory Interface Sti5518 can support both On chip memories that are 2KB SRAM 2KB SRAM or Data Cache and 2KB Instruction Cache and external expanded memories as of ROM and DRAM Moreover SDRAM can be used up to 64Mbits with MPEG memo...

Page 15: ... Kbyte SRAM Not available Memory Map The size of EMI Bus is 16bit and also support for the 8bit Bus The Bank0 of EMI can support DRAM Interface while rest of Bank as of Bank1 2 and 3 can only support SRAM ROM and Peripheral Interface Data 0 15 16bit data transfer Adr 1 21 When using DRAM it supports Multiplex mode Row and Column Address with the access ability of 32bit not_WE0 not_WE1 Signals indi...

Page 16: ...nce Clock high to Strobe Valid 8 0 0 0 ns tRCA CH Read Data valid to Reference Clock high 13 0 ns tCHRDX Read Data hold after Reference Clock high 2 0 ns tSVRDX Read Data hold after Strobe valid 0 0 ns 1 tCLWOV Reference Clock low to Write Data valid 8 0 7 0 ns 1 tCHWOV Reference Clock high to Write Data valid 8 0 6 0 ns 1 tCHWDZ Reference Clock high to Write data tristate 8 0 6 0 ns tCHRSV Refere...

Page 17: ...16 CIRCUIT OPERATION MANUAL EMI Interface Timing ...

Page 18: ...K Demodulator are combined into one Module Following feature shows the Block Diagram 2 WIRE BUS CONTROL Direct conversion ZIF Tuner 4MHz 4MHz TDA8260 INSIDE LPF Matched Filter Matched Filter 2 wire bus control AGC control Transport strem O P 950 2150MHz Channel Decoder TDA10086HT ...

Page 19: ...ER INPUT OF LNB A 2 NC 3 5V RF 5V OF RF AMP 20mA TYP 20mVp p 4 AGC AGC MONITORING 5 5V 5V OF 2 nd AMP ZERO IF IC 20mA TYP 20mVp p 6 GND 7 VT TUNING VOLTAGE 30V 20mVp p 8 I I SIGNAL MONITORING 9 Q Q SIGNAL MONITORING 10 5V POWER OF AGC AMP 10mA TYP 20mVp p 11 3 3V POWER OF FEC IC 200mA MAX 20mVp p 12 F22 22kHz OUTPUT serial 100ohm 13 1 8V PLL POWER of FEC IC 120mA MAX 20mVp p 14 RESET ACTIVE LOW se...

Page 20: ...with LNB 1 LNB power and 22khz Tone Pulse The power supplied to LNB sends the 22Khz Tone signal that is used in horizontal 18V vertical 13V and frequency Band and Diseqc Command Chart 6 LNB Control signals 22KHZ Tone Spec is Function High Low H V Horizental 18v Vertical 13v 22Khz ON 22Khz ON 22Khz OFF LNB ON LNB ON STD BY AUX IRD IRD MODE AUX MODE Loop Through External SAT 22Khz Tone Pulse ...

Page 21: ...orts Interlace mode or Non interlace mode There are 6 Pins for the Analogue Video output CVBS S VHS Y C RGB Moreover it supports Teletext closed captions and CGMS Following picture shows the signal formats from the individual output 1 CVBS Timing 2 Comparison of RGB signals RGB Signal Pulse a b c1 c2 d NTSC M 5 38 s even lines 5 52 s odd lines 1 56 s 8 8 s 9 3 s 9 cycles of 3 58MHz PAL BDGHI 5 54 ...

Page 22: ...00 0 00 0 000 White Yellow Cyan Green Magenta Red Blue Block 400 388 316 284 238 204 152 BLACK BLANK WHITE LEVEL LEVEL SYNC IFVFI Color Burst 10 Cycles Maintain 300mV Maintain 300mV White Yellow Cyan Green Magenta Red Blue Block White Yellow Cyan Green Magenta Red Blue Block 400 388 316 284 236 204 152 BLACK BLANK LEVEL SYNC LEVEL BLANCK LEVEL Color Burs1 10 Cycles WHITE LEVEL CVBS Y and C Wavefor...

Page 23: ... Pin that are used in the DSD 9251EAV is as following Chart 9 Slow Fast Blanking Function Chart 70 TV SCART Connector Pin SCART CONNENTOR Following Table shows the Scart Connector Can select either TV AV mode or 16 9 4 3 mode Slow Blanking TV AV Selecting TV AV mode of TV SET Pin8 TV mode 1 5V AV mode 11 13V 16 9 4 3 Selectint Wide Mode 4 3 mode 11 13V 16 9 mode 5 6 5V Select video input signal of...

Page 24: ...AC systems PCM1754 Texas Instruments Following diagram shows Timing Diagram with Audio DAC and TI PCM1754 Block 2 Audio Pin Name Description Singnal Level Impedance 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 AOR AIR AOL AGND B GND AIL B SWITCH G GND CLKOUT G DATA R GND DATAGND R BLNK VGND BLNKGND VOUT VIN SHIELD Audio Out Right Audio In Right Audio Out Left Mono Audio Ground RGB Blue Gr...

Page 25: ... SPDIF Format Use PCM1754 Texas Instruments which are IC of the Digital Audio Encoding system in SPDIF format The signals are entered from the PCM Format I2S Format The Digital Signals that were encoded in SPDIF go through driver circuit then the output is placed in the RCA unit This output will be connected with Digital Audio Devices LRCK BCK R channel L channel 1 f S DATA 1 2 N 1 N MS B LSB 4 8f...

Page 26: ... read write by PC 2 sign is displayed in Front Panel Check whether the User Data is being loaded to Main RAM from the Flash ROM Check the validity of Data Following Booting Message will be seen after executing UART Emulator Program when connecting SERIAL Port with PC 1 Development environment display STi5518 DVB Reference Firmware Version 6 0 Code Exe 0x4d4f52 ROM Software compiled on Apr 04 2000 ...

Page 27: ...er Initial TUNER Module Initialization Creating TUNER module semaphores module_type 148 Successfully Installed TUNER module 5 MPEG SDRAM configuration MPEG SDRAM configuration Video Bit Buffer Size 400 Kbytes From 0xc0000000 to 0xc0063fff Audio Bit Buffer Size 16 Kbytes From 0xc0064000 to 0xc0067fff OSD Buffer Size 400 Kbytes From 0xc0068000 to 0xc00cbfff Frame Buffer A Size 608 Kbytes From 0xc00c...

Page 28: ... serivce_num 0 LOAD POSt parsing process start LOAD POSt parsing process start LOAD POSt parsing process start LOAD POSt parsing process start LOAD POSt parsing process start Last Channel didn t save before Last Channel didn t save before 9 API Kernel Process Start SMALLWIN smallwin_scheduler PROCESS STARTED smallwin_scheduler start ok 10 Initializing AUDIO PES Manager 469 audiopes c Initialising ...

Page 29: ...ircuit Oscillating 27Mhz clock Flash Cs output status Check CPU power STi5518 Pin27 High Check ROM Booting Mode Check Wait Signal STi5518 Pin131 Low Eliminate the problems Replacing STI5518 BUS Interface port Check short open satus Resistor Flash ROM SDRAM Bufffer Check all BUS and control signal Check MEMCLK SDRAM PIN38 121MHz Persecute Short or Open Flash ROM Check Power OK Programmed Eliminate ...

Page 30: ...rol LNBP output OK IC27 PIN3 Eliminate problem causing factors Replace LNBP Check the power of LNB 13V 18V 12C Line Check Reset Check Check Locking Voltage 1 16V Tuner PIN 13 near TP Replace Tuner B Check IC related parts Check and eliminate problem parts Check Reset Circuit Eliminate problems Replace Tuner NO YES NO NO YES YES NO NO NO NO NO YES YES NO YES YES NO YES 2 Poor quality screen ...

Page 31: ...x the problem Check Error Pin Whether the output is in High Status Replace Tuner Tuner interface Signal check TS_Data F_packet_clk F_strt F_B_clk Fix the problem Pts Crystal Check Stream Input Signal check Link_Data Link_B_clk Link_val F_error Fix the problem TS Output Siggnal Check F_Data F_val Error Link_val Replace CPU Replace PtS Asic IC ...

Page 32: ...nput Signal PCM Data SCLK LRCLK PCMCLK YES NO YES NO NO Check the STi 5518 Check the Interface OF Audio AMP IC Replace STi5518 Replace Audio DAC Eliminate problems Replace Audio AMP Audio AMP Check Audio Buffer Check Eliminate problems Confirm the connection status of Port YES NO YES YES YES NO NO 3 Errors In Audio and Video ...

Page 33: ...ss Check the power status of Sit5518 Video Pin 23 Pin30 Check Related Circuits and execute the fixing process Replace STi5518 I V Ref Check STi5518 Pin28 29 Pin35 36 Verify the resistance value and perform necessary operation Confirm Video Buffer and perform necessary operation NO YES YES YES YES YES YES YES YES NO NO NO Bad quality of RGB TV Start RGB mode STi5518 RGB Output Pin Check Pin 25 26 2...

Page 34: ...SDT S1 SATELLITE Z0011 PVMPJ1M085 MAINCHIPMOUNTAAS DSD 9251EAV C101 HCQK270JBA CCHIPCERA 50VCH27PFJ1608 C102 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 C103 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 LOC PARTCODE PARTNAME PARTDESC REMARK C104 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 C107 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 C109 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 C110 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 ...

Page 35: ...BK104KBA CCHIPCERA 50VX7R0 1MFK1608 C730 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 LOC PARTCODE PARTNAME PARTDESC REMARK C735 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 C738 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 C741 HCBK104KBA CCHIPCERA 50VX7R0 1MFK1608 IC101 1ST15518BQ ICCHIPDECODER STI5518BVC208PINPQFP IC103 1SN74HCU0D ICCHIPHEXINVERTER SN74HCU04DR SO14 14PIN IC104 1T436416AT ICCHIPSDRAM T436416A 7S IC1...

Page 36: ...16 10KOHMJ1608 R141 HRFS103JBA RCHIP 1 16 10KOHMJ1608 R142 HRFS103JBA RCHIP 1 16 10KOHMJ1608 LOC PARTCODE PARTNAME PARTDESC REMARK R143 HRFS470JBA RCHIP 1 1647OHMJ1608 R144 HRFS470JBA RCHIP 1 1647OHMJ1608 R145 HRFS470JBA RCHIP 1 1647OHMJ1608 R146 HRFS470JBA RCHIP 1 1647OHMJ1608 R148 HRFS103JBA RCHIP 1 16 10KOHMJ1608 R201 HRFS101JBA RCHIP 1 16 100OHMJ1608 R202 HRFS103JBA RCHIP 1 16 10KOHMJ1608 R203...

Page 37: ... HRFS120JBA RCHIP 1 1612OHMJ1608 R507 HRFS829JBA RCHIP 1 16 8 2OHMJ1608 R508 HRFS750JBA RCHIP 1 1675OHMJ1608 LOC PARTCODE PARTNAME PARTDESC REMARK R509 HRFS681JBA RCHIP 1 16 680OHMJ1608 R510 HRFS681JBA RCHIP 1 16 680OHMJ1608 R511 HRFS104JBA RCHIP 1 16 100KOHMJ1608 R512 HRFS104JBA RCHIP 1 16 100KOHMJ1608 R513 HRFS000 BA RCHIP 1 16 0OHM1608 R514 HRFS000 BA RCHIP 1 16 0OHM1608 R515 HRFS102JBA RCHIP 1...

Page 38: ... C409 CEXE1C101E CELECTRO 16VRM100MF5X11 C414 CEXE1C101E CELECTRO 16VRM100MF5X11 C417 CEXF1C470A CELECTRO 16VRSM47MF 5X7 TP LOC PARTCODE PARTNAME PARTDESC REMARK C420 CEXE1C101E CELECTRO 16VRM100MF5X11 C425 CEXF1C100A CELECTRO 16VRSM10MF5X7 C426 CEXF1C100A CELECTRO 16VRSM10MF5X7 C427 CEXF1C100A CELECTRO 16VRSM10MF5X7 C431 CEXF1C220A CELECTRO 16VRSM22MF 5X7 C432 CEXF1C220A CELECTRO 16VRSM22MF 5X7 C...

Page 39: ...PS2022L FUSE WIDETL250V2ACASE IC802 1KA431AZ ICREGULATOR KA431AZ1 TO 92 LOC PARTCODE PARTNAME PARTDESC REMARK L803 56C220K695 COILCHOKE CAPTYPE 22UHK9X11 1 CAPTYPE L804 56C220K695 COILCHOKE CAPTYPE 22UHK9X11 1 CAPTYPE L805 56C220K695 COILCHOKE CAPTYPE 22UHK9X11 1 CAPTYPE L806 56C220K695 COILCHOKE CAPTYPE 22UHK9X11 1 CAPTYPE Q801 TZTC3205Y TR KTC3205Y 2236Y Q802 TZTC3203Y TR KTC3203Y 2120Y Q803 TZT...

Page 40: ...0 JACKSENSOROPTIC VST5B 12M P602 97P62K04E9 CONNFFC SCB 2109 M 209PST RF601 97P7214400 MODULATORRF SSM GKI1 U601 97P65442JA PCBJACK 42X48 6 247X199 20 D1B LOC PARTCODE PARTNAME PARTDESC REMARK DSD 9252 D103 D1N4004SRT DIODE 1N4004SRT D104 D1N4004SRT DIODE 1N4004SRT R123 HRFS103JBA RCHIP 1 16 10KOHMJ1608 ...

Page 41: ...40 SCHEMATIC DIAGRAM ...

Page 42: ...41 SCHEMATIC DIAGRAM ...

Page 43: ...42 SCHEMATIC DIAGRAM ...

Page 44: ...43 SCHEMATIC DIAGRAM ...

Page 45: ...44 SCHEMATIC DIAGRAM ...

Page 46: ...45 SCHEMATIC DIAGRAM ...

Page 47: ...46 SCHEMATIC DIAGRAM ...

Page 48: ...47 SCHEMATIC DIAGRAM ...

Page 49: ...48 SCHEMATIC DIAGRAM ...

Page 50: ...49 SCHEMATIC DIAGRAM ...

Page 51: ...50 SCHEMATIC DIAGRAM ...

Page 52: ...51 SCHEMATIC DIAGRAM ...

Page 53: ...52 SCHEMATIC DIAGRAM ...

Page 54: ...53 PARTS PLACEMENT ARRANGEMENT ...

Page 55: ...54 PARTS PLACEMENT ARRANGEMENT ...

Page 56: ...55 PARTS PLACEMENT ARRANGEMENT 9252 FRONT PCB ...

Page 57: ...56 PARTS PLACEMENT ARRANGEMENT 9251 FRONT PCB ...

Page 58: ...57 PARTS PLACEMENT ARRANGEMENT ...

Page 59: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp ...

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