Daewoo DSD-9251MA Service Manual
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Daewoo DSD-9251MA Service Manual

Daewoo DSD-9251MA Service Manual

Digital satellite receiver
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Digital Satellite Receiver
CHASSIS : SD-240V
DSD-9251MA
Model :
D
I
G
I
T
A
L
Digital V V ideo
DSD-9251MA
DSD-9251MA
Broadcasting
S/M No. : DSD240VEF0
OCT. 2003
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Summary of Contents for Daewoo DSD-9251MA

  • Page 1 S/M No. : DSD240VEF0 Digital Satellite Receiver CHASSIS : SD-240V DSD-9251MA Model : Digital V V ideo DSD-9251MA DSD-9251MA Broadcasting OCT. 2003...

  • Page 2: Table Of Contents

    . GENERAL INFORMATION 1. General Information 2. Main Feature of DSD-9251MA 3. For Your Safety 4. Unpacking 5. General Operation of DSD-9251MA 6. About the Smart Card and CA Module 7. Remote Control 8. Front Panel 9. Rear Panel 10.Product Specification .

  • Page 3: General Information

    5. General Operation of DSD-9251MA Throughout this manual you will notice that the everyday operation of your DSD-9251MA is based on a series of user friendly on screen display and menus. These menus will help you get the most from your DSD-9251MA, guiding you through installation, channel organizing, viewing and many other functions.

  • Page 4: About The Smart Card And Ca Module

    Please be aware that new software may change the functionality of the DSD-9251MA Should you experience and difficulties with the operation of your DSD-9251MA, please consult the relevant section of this manual, including the Problem Shooting, or alternatively call your dealer or a customer service adviser.

  • Page 5: Front Panel

    General Information 8. Front Panel Digital V V ideo DSD-9251MA DSD-9251MA Broadcasting FUNCTION Switches between the operational mode and stand-by mode. When watching, changes the channel, or in the menu, moves to the previous and next item. 9. Rear Panel...

  • Page 6: Product Specification

    General Information 10. Product Specification System Capabilities Fully DVB compliant Demodulator Waveform QPSK demodulation and FEC decoding in accordance with DVB prETS 300 421 Symbol rate 2 < Rs < 45 Msps Video Decoder Decompression MPEG-2 Mian Profile@Main Level Data rates Up to 60 Mbits/s Video formats 4:3, 16:9...

  • Page 7: Block Diagram

    . CIRCUIT OPERATING MANUAL 1. Block Diagram +3.3V +12V +30V + 22V + 7.5V Feature 1. Block Diagram...

  • Page 8: Interface

    CIRCUIT OPERATING MANUAL 2. Interface (1) Key Interface Input can be made by Key using PIO Port for the Key I/O control. The key value after the scanning is calculated by one Input port and 7 Output Ports. Output ports are used with the segments of the display. * Key Scan Method K0-K7 64ms...
  • Page 9 CIRCUIT OPERATING MANUAL (2) 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: Peripheral Device Of Sti 5518

    CIRCUIT OPERATING MANUAL 3. Peripheral device of STI5518 (1) Structure Block move ST20 2 MPEG DMAs Serial Interrupt IEEE 1394 controller SDAV interface Hardware transport strearn demux SmartCard interfaces (ASC) 2 Kbytes Instruction cache MPEG audio decoder AC-3 I/F 2K Data cache and 2K SRAM MPEG...
  • 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 Feature 6.
  • 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. ¥ I C_DATA (PIO1_0) ¥ I 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 and power on(High), Not connect or power off(Low) ¥...
  • 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 Feature 9. EMI Interface Timing...

  • Page 18: Front-End Interface

    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. Feature 10. Tuner Modul Block...
  • Page 19 CIRCUIT OPERATING MANUAL * The functions of individual Pin. PIN NAME PIN No. PIN DESCRIPTION LNB POWER B LNB Voltage supply. To put 1000PF of ceramic capacitor into ground. LNB POWER A LNB Voltage supply. To put 1000PF of ceramic capacitor into ground. A-GND GND.
  • 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 Feature 12.

  • Page 21: A/V Interface

    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 8.00 0.300 LEVEL 4.00 0.150 0.068 1.80 SYNC IFVFI 26.68 1.000 WHITE LEVEL Maintain 300mV 9.00 0.800 BLACK/BLANK LEVEL 0.00 0.000...
  • Page 23 CIRCUIT OPERATING MANUAL 1-4) Video Output There are 2 Video Output Port in the DSD-9251MA 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-9251MA uses the serial data of PCM format. PCM Data output format is in Standard format and I2S Compatible PCM format.
  • Page 25 Analogue Audio Signals that are modified at Audio DAC are amplified by three times after going through Low Pass Filter. The output is made after the amplification through AV Switch or Buffer. In DSD-9251MA, use the AV Switch (MM1232). Refer the A/V switch in the previous section of Video Explanation. 2) Digital Audio(SPDIF Format) Use TDA1315/Philips which are IC of the Digital Audio Encoding system in SPDIF format.

  • Page 26: Software Operating Steps

    6. Software Operating Steps (1) Operating Steps. A. Initialize multi-purpose PIO port B. STI5518 chip version detection C. Set DAEWOO 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: Booting Error

    . FIXING ERRORS 1. BOOTING ERROR (1) No response of Display Boot signal. Start No Display Boot signal. Power on? Modify Power status Check Reset Circuit. Is Reset IC working? Check 27Mhz VCXO and Oscillating 27Mhz other peripheral circuit. clock? Flash Cs output status? Check CPU power.
  • Page 30 ELECTRICAL PARTS LIST (2) Operation error after the BOOT signal Is the Operation of I2C_Data Check I2C related parts. Replacing STi5518 (STI5518, Tuner, RF-Mod) & I2C_Clk normal? Verify and eliminate the problem causing parts Memwait ’High’? Ci-Max IC check? (STi5518 Pin131 ) Replacing Ci-Max STi5518 to Ci-Max Line Check...

  • Page 31: Electrical Parts List

    ELECTRICAL PARTS LIST 2. Poor quality screen (1) Locking Error 30V,3V3 voltage OK? Check the power status Replace the SMPS of tuner Tuner (30V, VCC_TUNER, 3V3) 7805 Regulator Replace 7805 Regulator (IC46) OK?(VCC_TUNER) Check the power of LNBP output OK? LNBP Input Control ? (IC27 PIN3) LNB(13V/18V)

  • Page 32: Disabled Screen

    ELECTRICAL PARTS LIST (2) Disabled screen after Locking Check the 3.3V power of Fix the problem Tuner(Ripple,Voltage) Check Error Pin. Replace Tuner (Whether the output is in High Status.) Tuner interface Signal check? (TS_Data, F_packet_clk, F _strt, F_B_clk) Fix the problem ** CASE PtS Crystal Check? CI-Max Check...
  • Page 33 ELECTRICAL PARTS LIST ** CASE CAM Detection? Power Check(VCC) Fix the Problem PCMCIA Bus Interface Check? ( Ci-Data, Ci_Addr, Control) Check CAM Interface signal ( MDIA/B, MDOA/B, Control Fix the Problem Signal)
  • Page 34 ELECTRICAL PARTS LIST 3. Errors in Audio and Video (1) AUDIO ERROR Eliminate problems Check the power status of Audio DAC Replace STi5518 Check the STi5518 Check the Input Signal PCM Data, SCLK, LRCLK, PCMCLK) Check the Interface OF Replace Audio DAC Audio AMP IC Eliminate problems Audio AMP Check...
  • Page 35 ELECTRICAL PARTS LIST (2) VIDEO ERROR Booting OK STi5518 CVBS out check Video buffer, Low Pass Confirm and execute Filter Check Pin 34 the fixing process. Confirm the connection status of tracking port and execute the fixing process Check the power status of Check Related Circuits and execute Sti5518 Video the fixing process.

  • Page 36: Part List

    . PART LIST 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(Prats Price List) in Service information Center (http://svc.dwe.co.kr) LOCATION NO.
  • Page 37 PART LIST LOCATION NO. PART NAME DESCRIPTION Q'TY PART NAME R CHIP 1/16W,11 ohm, J (±5%) Size : 1.6 * 0.8mm R162 R CHIP 1/10W,12 ohm, J (±5%) Size : 1.6 * 0.8mm R82,R90,R94,R109,R128,R158,R177 R CHIP 1/10W,13 ohm, J (±5%) Size : 1.6 * 0.8mm R102 R CHIP 1/10W,22 ohm, J (±5%) Size : 1.6 * 0.8mm...
  • Page 38 PART LIST LOCATION NO. PART NAME DESCRIPTION Q'TY PART NAME MNR1,MNR2,MNR3,MNR5,MNR6,MNR7,MNR8 MNR9,MNR10,MNR12,MNR13,MNR14,MNR15MNR16 R CHIP ARRAY CHIP ARAY, 33 ohm J 3.2 * 1.6mm CN1J4ATD330J MNR17,MNR18,MNR19,MNR20,MNR21,MNR23,MNR24 RPX1,RPX2,RPX3,RPX4,RPX20,RPX21,RPX70,RPX71,RPX80,RPX81 L7,L15.L19,L21,L28,L30,L41,L43,L45,L52 L CHIP MULTI CHIP, 120 Ohm, SMD (±10%), Size : 2.0 * 1.25mm WB201209B121KNT L61,L62 LX1,LX2,LX3,LX4,LX5...
  • Page 39 PART LIST LOCATION NO. PART NAME DESCRIPTION Q'TY PART NAME JACK MINI DIN JACK DUAE-9619, SVHS Conn. Mini Din Socket 4Pin DUAE-9619 CONNECTOR SCART Scart Connector 42Pin, Shield Type 2203-42ST(B) JACK RCA RCA JACK Conn.4PIN 2000-04-T CONN D-SUB D-Sub 9Pin RS-232C connector 3302-09P-AFS-G0-T CN12 CONN WAFER...

  • 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 SCHEMATIC DIAGRAM...
  • Page 48 SCHEMATIC DIAGRAM...
  • Page 49 SCHEMATIC DIAGRAM...
  • Page 50 SCHEMATIC DIAGRAM...
  • Page 51 ELECTRICAL PARTS LIST...

  • Page 52: Exploded View

    . EXPLODED VIEW...

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