Daewoo DSD-9280M Service Manual
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Daewoo DSD-9280M Service Manual

Daewoo DSD-9280M Service Manual

Digital satellite receiver
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Service Manual

Digital Satellite Receiver
MODEL :
DSD-9280M
Caution :
In this Manual, some parts can be changed for improving, their
performance 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.
http : //svc.dwe.co.kr
S/M No. : DSD9280M01
Mar. 2004

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Summary of Contents for Daewoo DSD-9280M

  • Page 1: Service Manual

    In this Manual, some parts can be changed for improving, their performance 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. http : //svc.dwe.co.kr Mar. 2004...

  • Page 2: Table Of Contents

    CONTENTS GENERAL INFORMATION....................2 CIRCUIT OPERATION MANUAL .....................7 FIXING ERRORS ........................28 BOM LIST ..........................34 SCHEMATIC DIAGRAM ......................39 PARTS PLACEMENT(ARRANGEMENT) ................46...

  • Page 3: General Information

    GENERAL INFORMATION Digital Satellite Receiver is easy to use, and allows you to watch digital programs broadcasted via satellite. This instruction manual will guide you through the initial installation of your receiver. It also describes how to take full advantage of a wide range of features that are easily accessible. Read this instruction manual carefully before installing your receiver.

  • Page 4: For Your Safety

    GENERAL INFORMATION FOR YOUR SAFETY • Allow clear space of more than 10 cm from the top, back and both sides for sufficient ventilation. • Do not cover the Digital Satellite Receiver nor place it on a unit that emits heat. •...

  • Page 5: Remote Control

    GENERAL INFORMATION Remote Control Switches between the operational mode and Stand-by mode of the receiver MENU Displays the menu on the screen EXIT Returns to the previous menu or exit window Executes the selected item in the menu screen, or enters the Desired value in any input mode MENU /SAT...

  • Page 6: Front Panel

    GENERAL INFORMATION FRONT PANEL REAR PANEL LNB IN : Connect to Satellite Antenna 100~240V Power Input Serial : Connect to a PC for Connect to TV and VCR using a SCART cable S/W upgrade Reset the STB Connect Video to a TV using RCA jack, Connect Audio L/R to TV or Audio device...

  • Page 7: Product Specification

    GENERAL INFORMATION Product Specification Transmission Standards DVB, MPEG2 LNB/Tuner Input Connector IEC 169-24, Female-type Input Frequency 950 ~ 2150MHz Demodulation 2 Msps ~ 35Msps Code rate QPSK Max Current 400mA Supply Voltage 13V/18V DiSEqC 1.0, 1.2, USALS System Resources Processor 32bit, 81 MHz 8 MB 2 MB...

  • Page 8: Circuit Operation Manual

    CIRCUIT OPERATING MANUAL 1. Block Diagram +3.3V +12V +30V + 22 V + 7V...
  • Page 9 CIRCUIT OPERATING MANUAL 2. Interface (1) Remote controller Interface Recognize the REMOCON Code value after analyzing Interrupt Interval Time through PIO Port that reads the output signal of the IR sensor. MITSUBISH formats were used for the REMOCON signal. Following is the Timing Diagram for the MITSUBISH signal format.
  • Page 10 CIRCUIT OPERATING MANUAL Chart 1. Remote controller Key Code Key Function Key Function Custom code 0x16 0x1C Power 0x15 INF0 0x21 Mute 0x12 0x17 0x01 0x18 0x02 0x14 0x03 0x13 0x04 0x11 0x05 EXIT 0x23 0x06 0x1D 0x07 0x24 0x08 PAUSE 0x1E 0x09...
  • Page 11 CIRCUIT OPERATING MANUAL 3. Peripheral device of ST15518 (1) Structure Block move Block move ST20 ST20 2 MPEG 2 MPEG DMAs DMAs Serial Interrupt Interrupt Serial IEEE 1394 IEEE 1394 controller controller SDAV SDAV interface interface Hardware Hardward transport transport strearn strearn demux demux...
  • Page 12 CIRCUIT OPERATING MANUAL (2) Reset Section. If the Low signal is read by Sti5518 Reset Pin, the Register value of all Sti5518 will be initialized. There must be at least of 8 clock (37nsec) of Reset Time. not_Rst tRSTLRSTH Min 8x37nsec Reset Timing (3) Clock Section.
  • Page 13 CIRCUIT OPERATING MANUAL This section only provides summaries of individual function of each Port. Further discussion will be followed in individual port section. C_DATA (PIO1_0) C_CLK (PIO1_2) Used for the transmission of Serial and control of Tuner, CI-Max, AV Switch and RF Modulator. ClkPolarity ClkPhase Serial clock SCIK Plns MTSR/MRST...
  • Page 14 CIRCUIT OPERATING MANUAL NOTPGM_EN (PIO1_3) Flash ROM Write protect/ Program enable (Low) or Program disable (High) SLOW_S/W (PIO1_4) Checking the connection of external features with Vcr scart such as VCR and general power on/off status. Connect power on(High), Not connect or power off(Low) RS232_Tx (PIO1_5) RS232_Rx (PIO1_6) Rs232 serial data transfer (Used to S/W upgrade, Debugging)
  • Page 15 CIRCUIT OPERATING MANUAL Following is the Memory MAP Table. 0x7FFFFFFF EMI Bank 3 (FLASH) 0x70000000 EMI Bank 2 0x60000000 EMI Bank 1 0x50000000 EMI Bank 0 0x40000000 0x20040000 Peripheral configuration registers 0x00000000 Not available 0xC0400000 Shared SDRAM 0xC0000000 Not available 0x80001000 2 Kbyte data cache when used as SRAM 0x80000800...
  • Page 16 CIRCUIT OPERATING MANUAL MemWait Wait signal is produced in external device when accessing SRAM and peripheral devices. Wait signal is maintained as Order status in the High status motivated by processor clock. Not_OE Read Strobe ReadnotWrite The ability to Read or Write of processing cycle. Symbol Parameter Units...
  • Page 17 CIRCUIT OPERATING MANUAL EMI Interface Timing...
  • Page 18 CIRCUIT OPERATING MANUAL 4. Front-End Interface (1) Tuner Module Tuner and QPSK Demodulator are combined into one Module. Following feature shows the Block Diagram.
  • Page 19 CIRCUIT OPERATING MANUAL PIN NO MARK DESCRIPTION CURRENT RIPPLE(MAX) LNB A POWER INPUT OF LNB A 5V(RF) 5V OF RF-AMP 20mA(TYP.) 20mVp-p AGC MONITORING 5V OF 2’nd AMP & ZERO-IF IC 20mA(TYP.) 20mVp-p TUNING VOLTAGE 30V 20mVp-p I SIGNAL MONITORING Q SIGNAL MONITORING POWER OF AGC AMP 10mA(TYP.)
  • Page 20 CIRCUIT OPERATING MANUAL Serial Output Timing STA R T RS0 = 0 Bi t CLK RS0 = 1 Data Parity P A C K E T First bit of the packet Useful Data Parity E R R O R 1 Packet Serial Data Output Timing (2) Related with LNB.
  • Page 21 CIRCUIT OPERATING MANUAL 2) Loop Through Supports Loop Through for the Interface function of other Satellite Devices. That means, in other Satellite device, the control of LNB related voltage and Tone are possible. If the signal of AUX/IRD Control is in High status, the LNB voltage is provided from LNBP. If it s in Low, the power can be supported from the external device in the Default states.
  • Page 22 CIRCUIT OPERATING MANUAL 3) Color Bar CVBS, Y, C, signals 32.88 1.233 28.88 1.000 WHITE LEVEL Color Burst (10 Cycles) 12.01 0.450 BLACK/BLANK 0.300 8.00 LEVEL 4.00 0.150 0.068 1.80 SYNC IFVFI WHITE LEVEL 26.68 1.000 Maintain 300mV 9.00 0.800 BLACK/BLANK LEVEL 0.000 0.00...
  • Page 23 CIRCUIT OPERATING MANUAL 1-4) Video Output There are 2 Video Output Port in the DSD-9250E products. (TV Scart, RCA JACK) The output of R,G and B signals are sent to TV Scart through Video Buffer and LPF (Low Pass Filter) originated from the STI5518 output.
  • Page 24 1) PCM Audio Audio related output of the Sti5518 is made in the form of PCM format and AC3 Interface format. DSD-9280M uses the serial data of PCM format. PCM Data output format is in Standard format and I2S Compatible PCM format.
  • Page 25 CIRCUIT OPERATING MANUAL APPSEL APPL0 CONTROL DIGITAL INTERFACE APPL1 INTERFACE DATA APPL2 APPL3 VOLLUME/MUTE/DE¥EMPHASIS UDA1330A INTERPOLATION FILTER SYSCLK NOISE SHAPER O(L) O(R) REF(DAC) Audio DAC(UDA1330) Block L_ch R_ch LRCIN (pin 1) BCKIN (pin 3) AUDIO DATA WORD = 16-BIT DIN (pin 2) 14 15 16 14 15 16 14 15 16...
  • Page 26 CIRCUIT OPERATING MANUAL 6. Software Operating Steps (1) Operating Steps. A. Initialize multi-purpose PIO port B. STI5518 chip version detection C. Set DMT default multi-purpose PIO port D. Initialize the OS20 software scheduler E. Initialize the interrupt subsystem F. Flash vendor check G.Booting mode check(UART Debugging mode / Factory Test Mode / Normal Mode) H.
  • Page 27 CIRCUIT OPERATING MANUAL --- DEVELOP driver configuration --- [UARTIO fitted] [UNHOSTED NOT fitted] [STREPORT fitted] --- MPEG driver configuration --- [B_ON_THE_FLY fitted] [ENABLE_AVSYNC fitted] [DONT_BLOW_UP_HALF_SIZE_PICTURES NOT fitted] [BUILT_FOR_16MBIT fitted] [DECODE_ELEMENTARY_STREAM NOT fitted] [SIF_UPSAMPLING_WORKAROUND NOT fitted] 2) I2C driver initialized message I2C driver initialized 3) API Information &...
  • Page 28 CIRCUIT OPERATING MANUAL 7) Teletext Driver & Process Start Teletext driver library v1.0 - Version of Apr 04 2000 at 01:34:03 Creating Teletext VBI task (priority=9) The teletext_data_transfer task is running Creating Teletext STB Page Filter task (priority=9) The ttx_stb_page_filter task is running Creating Teletext Handler task (priority=9) teletext_handler task is running 8) User Data Loading &...

  • Page 29: Fixing Errors

    FIXING ERRORS 1. BOOTING LED ERROR (1) No response of Display Boot signal. Start No Display LED signal. Power on? Modify Power status. Check Reset Circuit. Is Reset IC working? Check 27Mhz Crystal and Oscillating 27Mhz clock? other peripheral circuit. Flash Cs output status? Check CPU power.
  • Page 30 FIXING ERRORS (2) Operation error after the BOOT signal Is the Operation of 12C_Data & Check 12C related Replacing STI 5518 12C_CIK normal? parts.(STI5518, Tuner) Memwait High ? Interrupt IRQ 0 High ?
  • Page 31 FIXING ERRORS 2. Poor quality screen 2. Poor quality screen (1) Locking Error 30V, 3V3 voltage OK? Replace the SMPS Check the power status of tuner(30V, VCC_TUNER,3V3) Replace Q808. Tr(Q808)OK?(VCC_TUNER) LNBP output OK?(IC27 Check the power of LNBP Input control? PIN3) LNB(13V/18V) Eliminate problem causing factors.
  • Page 32 FIXING ERRORS (2)Disabled screen after Locking Check the 3.3V power of Fix the problem Tuner(Ripple, Voltage) Check Error Pin.(Whether Replace Tuner the output is in High Status.) Tuner interface Signal check? (TS_Data, F_packet_clk, F_strt, F_B_clk) Fix the problem. Pts Crystal Check? Fix the problem.
  • Page 33 FIXING ERRORS 3. Errors In Audio and Video 3. Errors in Audio and Video (1) AUDIO ERROR Eliminate problems Check the power status of Audio DAC Check the STi 5518 Replace STi5518 Check the Input Signal PCM Data, SCLK, LRCLK, Check the Interface OF Replace Audio DAC PCMCLK)
  • Page 34 FIXING ERRORS (2) VIDEO ERROR Booting OK Video buffer, Low Pass Confirm and execute the STi5518 CVBS out check Filter Check fixing process Pin34 Confirm the connection status of tracking port and execute the fixing process Check the power status of Check Related Circuits and execute the Sit5518 Video fixing process...

  • Page 35: Bom List

    PPL(Parts Price List)in Service information Center(http://svc.dwe.co.kr) PARTS_CODE PARTS_NAME PARTS_DESCR REMARK PARTS_CODE PARTS_NAME PARTS_DESCR REMARK PVACPSM084 ACCESSORY AS DSD-9280M IC10A 4957001802 HEAT SINK AL EX DP01 97P95600A0 MANUAL OWNERS N-PAL/NTSC IC10B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN DP03...
  • Page 36 R METAL FILM 2W 56 OHM J SMALL C819 CEXF1C101A C ELECTRO 16V RSM 100MF (6.3X7) TP Z0013 PVMPJAM084 PCB MAIN AXIAL AS DSD-9280M C822 CEXF1H330V C ELECTRO 50V RSS 33MF (6.3X11) TP AM31 2TM14006LB TAPE MASKING 3M #232 6.0X2000M...
  • Page 37 BOM LIST PARTS_CODE PARTS_NAME PARTS_DESCR REMARK PARTS_CODE PARTS_NAME PARTS_DESCR REMARK D806 DZN4004 - DIODE 1N4004(AUTO) JP47 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING D807 DZUZ3R0BSB DIODE ZENER UZ-3.0BSB(3.01-3.22V) JP48 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING D808 DZN4148 - DIODE 1N4148 AUTO 52MM 85801065GY WIRE COPPER...
  • Page 38 U001 97P65356MA PCB MAIN 246X197 D1B R210 RD-AZ223J- R CARBON FILM 1/6 22K OHM J Z007 PVDEMSM084 PCB DECODER MANUAL AS DSD-9280M R211 RD-AZ223J- R CARBON FILM 1/6 22K OHM J AM02 2193011100 SOLDER WIRE 60 SNA 1.2D R212 RD-AZ223J-...
  • Page 39 BOM LIST PARTS_CODE PARTS_NAME PARTS_DESCR REMARK PARTS_CODE PARTS_NAME PARTS_DESCR REMARK CE17 HCEJF220MC C CHIP ELECTRO 16V 22MF CS 4052 RC37 HRFS103JBA R CHIP 1/16 10K OHM J 1608 CE18 HCEJF220MC C CHIP ELECTRO 16V 22MF CS 4052 RC38 HRFS103JBA R CHIP 1/16 10K OHM J 1608 IC11 1SN74HCU0D...

  • Page 40: Schematic Diagram

    SCHEMATIC DIAGRAM...
  • Page 41 SCHEMATIC DIAGRAM...
  • Page 42 SCHEMATIC DIAGRAM...
  • Page 43 SCHEMATIC DIAGRAM...
  • Page 44 SCHEMATIC DIAGRAM...
  • Page 45 SCHEMATIC DIAGRAM...
  • Page 46 SCHEMATIC DIAGRAM...

  • Page 47: Parts Placement(Arrangement)

    PARTS PLACEMENT(ARRANGEMENT)
  • Page 48 PARTS PLACEMENT(ARRANGEMENT)
  • Page 49 DAEWOO ELECTRONICS Corp. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA...

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