Daewoo DSN-300A Service Manual
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Daewoo DSN-300A Service Manual

Daewoo DSN-300A Service Manual

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Service Manual
INTERNET SETTOP BOX
CHASSIS: CM-300
Model: DSN-300A
DSN-300B, S
DAEWOO ELECTRONICS CO., LTD.

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Summary of Contents for Daewoo DSN-300A

  • Page 1 Service Manual INTERNET SETTOP BOX CHASSIS: CM-300 Model: DSN-300A DSN-300B, S DAEWOO ELECTRONICS CO., LTD.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. PRODUCT SPECIFICATION ......................... 2 2. DESCRIPTION OF THE EXTERNAL PORT ..................3 3. BLOCK DIAGRAM..........................4 4. INTERNET SET TOP BOX SPECIFICATION..................5 5. DESCRIPTION OF THE CIRCUIT OPERATION................... 7 6. PIN................................11 7. MODEM COM PORT SETTING......................17 8.

  • Page 3: Product Specification

    1. PRODUCT SPECIFICATION 1-1. DSN-300A S Y S TE M IN TE R N E T , E -M A IL, B B S N TS C , P A L(4 .43 M hz), V G A 64 0  4 80...

  • Page 4: Description Of The External Port

    2. DESCRIPTION OF THE EXTERNAL PORT TESTING POSITION ITEM SPECIFICATIONS REMARKS AND CONDITIONS 120 V ac ± 10% M ain A C B o th end s of the A C D S N -30 0A 5V ± 5% V cc B + V C C , G N D Im a ge Inp ut V G A IN 75...

  • Page 5: Block Diagram

    3. BLOCK DIAGRAM...

  • Page 6: Internet Set Top Box Specification

    4. INTERNET SET TOP BOX SPECIFICATION 4-1. HARDWARE SPECIFICATION 1. CPU : VLSI VY86C7500 ARM7 RISC CPU core from Advanced RISC Machine Co. H ighly intergrated R IS C com puter 30 D hrystone 2.1 M IP S A R M 7 core @ 33M H z C P U clock 4 K byte com bined instruction and data cache Flexible M em ory M anagem ent U nit S upports 16 or 32 bit w ide m em ory via internal R O M and D R A M controllers...
  • Page 7 6. Accessory R em ocon W ireless K eyboard ( O ption ) R C A , S -C abie 4-2. SOFTWARE SPECIFICATION 1. Network Access A ny IS P accessible (D irect P P P S erver) 2. Browser H T M L 3.2 S upport Font size : 3 sets Fast Form atting...

  • Page 8: Description Of The Circuit Operation

    5. DESCRIPTION OF THE CIRCUIT OPERATION 1. ARM 7500 part The circuit is divided into digital and analogue input/output parts around the A R M 7500 part. Tw o addresses and tw o data buses are basically served from the A R M 7500 part. R A (D R A M R O W /C O LU M N M U LTIP LE X E D AD D R E S S E S ) uses 12 bits.
  • Page 9 7. CLOCK part A clock is needed for the m ain board of the IN T E R N ET S E T TO P B O X . M C LK (65 M H z) and V C LK (25.18 M H z) are supplied to the A R M 7500, and X O U T (14.318 M H z) is supplied to C H 7001A .
  • Page 10 ARM 7500 The A R M 7500 is used for the basic processor in D aew oo IN T ER N E T S ettop box D S N -300A . The A R M 7500 is a m ultim edia processor im plem ented on a chip. A chip is com posed of im age and sound treatm ent part, and other I/O treatm ent parts, centering the A R M 710C C P U core.
  • Page 11 This m icro-controller uses a reform ed m em ory interface, ensuring both low er costs and high quality. The m em ory interface control logic is designed perfectly asynchronously to the I/O control logic. A 32-bit or 16-bit m em ory system can be used. The D R A M controller is designed to drive even 4-bank D R AM directly.

  • Page 12: Pin

    6. PIN PIN NUMBER SIGNAL NAME PIN NUMBER SIGNAL NAME PIN NUMBER SIGNAL NAME LA[15] ED[3] LA[16] D[12] ED[2] LA[17] D[11] ED[2] LA[18] D[10] ED[0] LA[19] D[9] LA[20] D[8] VSYNC LA[21] VSS_CORE D[7] HSYNC LA[22] D[6] VDD_CORE D[5] VIREF LA[23] D[4] VDD_ANALOG LA[24]...
  • Page 13 PIN NUMBER SIGNAL NAME PIN NUMBER SIGNAL NAME PIN NUMBER SIGNAL NAME vdd_atod B D (3) nM SC S ATO D R EF B D (2) nBLO ATO D (3) B D (1) nR B E TO D (2) B D (0) nW BE ATO D (1) M SC LK...
  • Page 14 6-1. MBM29F040A-90PD4 PLCC Function TO A A dd ess Inpu ts D Q 0 T O D Q 7 D ata Inpu ts/O utp uts C hip E na ble O u tpu t E na ble W rite E n able V ss D evice G rou nd D evice P ow er S up ply...
  • Page 15 6-3. 74HC377D 6-4. CS4333K-S AOUTL SDATA DEM/SCLK AGND LRCK AOUTR MCLK 6-5. GMS 97C52 (T2) P1.0 (T2 EX) P1.1 P0.0 (AD0) P1.2 P0.1 (AD1) P1.3 P0.2(AD2) P1.4 P0.3 (AD3) P1.5 P0.4 (AD4) P1.6 P0.5 (AD5) P1.7 P0.6 (AD6) P0.7 (AD7) (RXD) P3.0 EA/VPP (TXD) P3.1...
  • Page 16 6-6. AT89C2051 P1.7 (RXD) P3.0 P1.6 (TXD) P3.1 P1.5 XTAL2 P1.4 XTAL1 P1.3 (INTO) P3.2 P1.2 (INT1) P3.3 P1.1 (AIN1) (TO) P3.4 P1.0 (AIN0) (T1) P3.5 P3.7 6-7. CH7001A CLKEN* VREF2 CLKOUT AVDD DVDD DGND TEST* CHRONTEL CH7001A DVDD UNDERSCAN DGND DVDD DGND...
  • Page 17 6-8. CH9294G-S XO/FIN VCLK XOUT AGND AVDD STROBE MCLK...

  • Page 18: Modem Com Port Setting

    7. MODEM COM PORT SETTING 3361FX(C)3420 YES-581CLX IRQ - 3 4 5 7 12 11 10 1 2 3 4 JP13 FIX COM2 IRQ3...

  • Page 19: Trouble Shooting Charts

    8. TROUBLE SHOOTING CHARTS 8-1. NO DISPLAY V ID E O C O N N E C TO R C H E C K C H 7001A IN /O U T C H E C K C H 9294G X O U T C H E C K N .G .
  • Page 20 8-2. ROM BOOTING TROUBLE FLA S H R O M C H E C K N .G . R O M S O C K E T S O C K E T C H E C K R E TO U C H /R E P LA C E N .G .
  • Page 21 8-4. CAN NOT CALL LIN E LIN E N .G . C H E C K C H A N G E N .G . C O N N E C TIO N R E C O N N E C T IO C H E C K N .G .
  • Page 22 8-5. CAN NOT CONNECT TO INTERNET D IA L S E TU P D IA L SE T U P N .G . C H E C K C H A N G E N .G . ID /P A S S W O R D ID /P A S SW O R D C H E C K C H A N G E...
  • Page 23 8-6. NO RF MODULATOR OUTPUT R F M O D U LA TO R C H E C K N .G . V ID E O /S O U N D R C A JA C K C H E C K R E P LA C E N .G .
  • Page 24 8-8. NO FUNCTION OF WIRELESS KEYBOARD/REMOCON B A TT E R Y C H E C K N .G . R E C E IV E W IN D O W R E P LA C E C H E C K N .G .
  • Page 25 8-9. PC INPUT PICTURE IS FIOWING VERTICALLY N .G PC C O N N E C TO R C O N N EC TO R C H E C K C H A N G E N .G P C S E TU P (640 480) S E TU P C H E C K...
  • Page 26 8-10. NO FUNCTION OF KEYBOARD/MOUSE C O N N E C TO R C H E C K N .G . K B D /M O U S E R E P LA C E R E P LA C E C H E C K N .G .
  • Page 27 8-11. FAILURE OF POWER LED N .G P O W E R C O R D /S W R E AC TIO N C H E C K N .G P 012V C C (+5V ) P O W ER M O D U LE C H E C K (W H E N O P E N ) R E P A IR N .G .
  • Page 28 8-12. NO COLOR N .G V ID E O /V G A C A B LE R E C O N N E C T IO N C H E C K N .G C H 7001A IN /O U T C H 7001A C H E C K R E P LA C E...
  • Page 29 8-13. NO SOUND OUTPUT S O U N D C O N N E C TO R C H E C K N .G P R E F E R E N C E S O U N D E FFE C T S O U N D S E TU P C H E C K N .G .
  • Page 30 8-14. NO VGA OUTPUT V G A C O N N EC TO R C H E C K N .G S W P U S H S W P U SH R E P LA C E IN /O U T C H E C K A R M 7500 R G B C H E C K N .G .

  • Page 31: Replacement Parts List

    9. REPLACEMENT PARTS LIST LO C PART-CODE PART-NAM E PART-DESC REM ARK ZZ110 PTAC P W J565 A C C ESS O R Y AS D SN -300A 00100 4924500100 B AG PO LY LD -PE T0.05 00110 4921800100 M AN U AL IN STR U C TIO N D EU K (161X240) 00120 4921800200...
  • Page 32 LO C PART-CODE PART-NAM E PART-DESC REM ARK IP01 1TFM S5380A IC U N IT R /R E CE IVE R TFM S 5380A (38K H Z) I004 1M 29F040AP IC C H IP FLASH M EM O RY M BM 29F040A-90PD 4 I005 1G M S97C 52- IC M IC O M...
  • Page 33 LO C PART-CODE PART-NAM E PART-DESC REM ARK BL012 H FFH 1H 700E FE RR ITE C H IP BE AD H B-1H 3216-700JT BL013 H FFH 1H 700E FE RR ITE C H IP BE AD H B-1H 3216-700JT BL014 H FFH 1H 700E FE RR ITE C H IP BE AD...
  • Page 34 LO C PART-CODE PART-NAM E PART-DESC REM ARK C 045 H C TA D 339M B C C HIP TA NTA L 10V 3.3M F M 3216 C 046 H C Q K102JC A C C HIP C E R A 50V C H 1000PF J 2012 C 047 H C TB D 100M B...
  • Page 35 LO C PART-CODE PART-NAM E PART-DESC REM ARK D 018 D M M BD 1203B D IO D E C H IP M M BD 1203 D 019 D M M BD 1203B D IO D E C H IP M M BD 1203 D 021 D M M BD 1203B...
  • Page 36 LO C PART-CODE PART-NAM E PART-DESC REM ARK R 009 H R FT330JC A R C HIP 1/10 33 O H M J 2012 R 010 H R FT330JC A R C HIP 1/10 33 O H M J 2012 R 014 H R FT330JC A R C HIP...

  • Page 37: Exploded View

    10. EXPLODED VIEW 10-1. DSN-300A...
  • Page 38 DESCRIPTION PART CODE PART NAME Q’ s SPEC. DESC. 4920200100 PANEL FRONT HIPS BK 4921400100 REFLECTOR LED PMMA 4921200100 DECO SENSOR PMMA 4920100200 CABINET BOTTOM 4921500100 RUBBER BK PCB POWER AS 7121300811 TAPPING SCREW PAN 3*E MFZN 4922300100 SUPPORTER NYLON 66, DABS 10R 4859802696 PCB MAIN AS 7121300811...
  • Page 39 10-2. MODEL: DSN-300S...
  • Page 40 DESCRIPTION PART CODE PART NAME Q’ s SPEC. DESC. 4920200100 PANEL FRONT HIPS BK 4921400100 REFLECTOR LED PMMA 4921200100 DECO SENSOR PMMA 4920100200 CABINET BOTTOM 4921500100 RUBBER BK PCB POWER AS 7121300811 TAPPING SCREW PAN 3X8 MFZN 4922300100 SUPPORTER NYLON 66, DABS 10R 4859802696 PCB MAIN AS 7121300811...
  • Page 41 (4) (3)+LABEL SERIAL DESCRIPTION PART CODE PART NAME Q’ s SPEC. DESC. 4924600100 4924500200 BAG STB LDPS TO 4925000200 ASS’ Y SET DSN-300A 4924700100 BOX CARTION SW-2, COLOR 4921800100 MANUAL INSTRUCTION 161X240 4921800200 INSTRUCTION DISKET 3.5” 4924500100 BA POLY LDPE TO 05...

  • Page 42: Description Of Exploded View

    11. SCHEMATIC DIAGRAM...
  • Page 47 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “ DAEWOOELEC” E-mail : G7F00E@web.dwe.co.kr FAX : 02) 360-8184 TEL: 02) 360-8178~8182 S/M NO. : CM300M-010 PRINTED DATE : MAY 1998...

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