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11. SCHEMATIC DIAGRAM

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Summary of Contents for DSN-300A

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

Page 2: ...E 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 TROUBLE SHOOTING CHARTS 18 9 REPLACEMENT PART...

Page 3: ...PAL 4 43Mhz VGA 640 480 AC POW ER AC120V 60Hz POWER CONSUMPTION 15W Under WIDTH 280mm DEPTH 220mm HEIGHT 52mm WEIGHT 1 6Kg SYSTEM INTERNET E MAIL BBS DISPLAY NTSC PAL 4 43Mhz VGA 640 480 AC POW ER AC...

Page 4: ...0 28Vp p 5 VGA OUT 75 R G B 0 707 5 LINEAR DC OFFSET 0 5 V H SYNC 31 5kHz 40kHz V SYNC 50kHz 90kHz Sound Output RCA AUDIO 47 k or more 1 414Vp p 10 The standard is 3 8dBM Wire Keyboard or Mouse Input...

Page 5: ...4 3 BLOCK DIAGRAM...

Page 6: ...hannels 32 bit CD quality serial sound channel Video controller with up to 120MHz pixel clock 16 million colors from 256 entry palette 16 level grey scales for LCD displays Suspend and stop power savi...

Page 7: ...2 Support Font size 3 sets Fast Formatting HTTP 1 0 Protocol Support FORM Table Support GIF JPEG XBM Type Image Support GIF animation Support W AV PCM Type Audio Support Frame Support Bookmark Proxy...

Page 8: ...W then turn the A S SW off in 2 sec 3 FLASH MEMORY part BD and LA are connected to FLASH MEMORY the capacity is 1 Mbyte to 4 Mbit memories 1 byte 8 bit which performs the same function as a hard disc...

Page 9: ...reo sound data and the clock 9 POWER part DC 5V is applied to the main part from the power module through CONN AS by operating SMPS The power LED is turned ON OFF by receiving signals from the power m...

Page 10: ...Oscillator VCO in order to supply the master frequency The sound block has an 8 bit analogue stereo system and a 32 bit serial sound interface suitable to drive the external CD DAC The clock control...

Page 11: ...M controller is designed to drive even 4 bank DRAM directly The DMA channel in which 3 programs can be operated includes image CRT and sound data There are 3 I O cycle types as follows Simple I O fixe...

Page 12: ...G 16 LA 28 56 VDD 96 nTEST 17 D 31 57 PCOMP 97 nINT8 18 D 30 58 VSS 98 nINT3 19 D 29 59 VCLKI 99 nINT6 20 D 28 60 VCLKO 100 INT7 21 VSS 61 VDD_SOUND 101 RA 11 22 D 27 62 LP 102 RA 10 23 D 26 63 RP 103...

Page 13: ...1 218 nCDACK 139 nRESET 179 IOP 0 219 IORNW 140 nROMCS 180 ID 220 nPCCS2 141 BD 15 181 OD 1 221 nPCCSI 142 BD 14 182 OD 0 222 LNBW 143 I_OCLK 183 SETCS 223 LA 0 144 VSS 184 INT9 224 LA 1 145 nEVENT2...

Page 14: ...ce Ground VCC Device Power Supply 5 0V 10 A 12 A 15 A 16 A 18 Vcc WE A 17 DQ 1 DQ 2 Vss DQ 3 DQ 4 DQ 5 DQ 6 4 3 2 1 32 31 30 5 6 7 8 9 10 13 12 11 A7 A6 A5 A4 A3 A2 DQ0 A0 A1 29 28 27 26 25 24 21 22 2...

Page 15: ...8 7 6 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 T2 P1 0 T2 EX P1 1 P1 2 P1 3 P1 4 P1 5 P1 6 P1 7 RST RXD P3 0 TXD P3 1 INTO P3 2 IMT1 P3 3 TO P3 4 T1 P3 5 WR P3 6 RD P3 7 XTAL2 XTAL1 GND V...

Page 16: ...7 20 19 18 17 16 15 14 13 12 11 STRO BE AGND R AVDD G AGND B AVDD AGND VREF1 AGND 6 5 4 3 2 1 44 43 42 41 40 VDD RSET GND Y CVBS C GND VDD UP DO W N LEFT 18 19 20 21 22 23 24 25 26 27 28 CLKEN CLKOUT...

Page 17: ...16 6 8 CH9294G S 1 2 3 4 5 6 7 8 9 10 XO FIN XI MS2 FS0 FS1 STROBE FS2 FS3 MS0 GND VDD VCLK XOUT GND AGND AVDD GND VDD MCLK MS1 20 19 18 17 16 15 14 13 12 11...

Page 18: ...17 7 MODEM COM PORT SETTING YES 581CLX 1 2 3 4 JP13 2 3361FX C 3420 14 13 12 11 10 9 8 7 6 5 4 3 2 1 IRQ 3 4 5 7 12 11 10 P1 CE FIX COM2 IRQ3...

Page 19: ...CTOR CHECK CH7001A IN OUT CHECK CH9294G XOUT CHECK VGA OUT CHECK ARM7500 RGB CHECK CH9294G VIDCLK CHECK ROM BOOTING CHECK DRAM REPLACE CHECK ARM7500 REPLACE CH7001A CHECK REPLACE CH9294G REPLACE SOFT...

Page 20: ...KET CHECK SOFTWARE UPGRADE CHECK FLASH ROM REPLACE CHECK FLASH ROM REPLACE ARM7500 BOARD CHECK SOFTW ARE UPGRADE SOCKET RETOUCH REPLACE N G N G N G PC SIGNAL 640 480 TV ENCODER PC SIGNAL CHECK CABLE C...

Page 21: ...20 8 4 CAN NOT CALL LINE CHECK CONNECTION CHECK ISA SLOT CHECK MODEM REPLACE CHECK MODEM CHANGE RETOUCH REPLACE RECONNECTIO N G N G ARM7500 PORT CHECK LINE CHANGE N G N G...

Page 22: ...5 CAN NOT CONNECT TO INTERNET DIAL SETUP CHECK ID PASSW ORD CHECK LINE TONE CHECK SERVER CHECK LINE CONNECTION CHECK ID PASSW ORD CHANGE N G N G ROM BOOTING CHECK DIAL SETUP CHANGE N G SOFTW ARE UPGR...

Page 23: ...TER OUTPUT RF MODULATOR CHECK VIDEO SOUND CHECK DC 5V CHECK VCC 5V CHECK DC JACK REPLACE RCA JACK REPLACE N G N G PRINTER CONNECTOR CHECK PREFERENCE PRINTER SETUP CHECK 74HC377 IN OUT CHECK ARM7500 CH...

Page 24: ...ON OF WIRELESS KEYBOARD REMOCON BATTERY CHECK RECEIVE W INDOW CHECK X004 CHECK GMS97C52 EMCLK EKCLK CHECK X004 REPLACE REPLACE N G N G AT89C2051 2 3 CHECK SOFTW ARE UPGRADE GMS97C52 REPLACE AT89C2051...

Page 25: ...ALLY PC CONNECTOR CHECK PC SETUP 640 480 CHECK TV CODER SOFT CHECK PC IN SIGNAL CHECK TV CODER DISK EXECUTE SETUP CHANGE N G N G SW PUSH CHECK ROM BOOTING CHECK PC SIGNAL CHANGE SW PUSH REPLACE N G N...

Page 26: ...25 8 10 NO FUNCTION OF KEYBOARD MOUSE CONNECTOR CHECK KBD MOUSE REPLACE CHECK X004 CHECK GMS97C52 EMCLK EKCLK CHECK X004 REPLACE REPLACE N G SOFTW ARE CHECK GMS97C52 REPLACE N G N G...

Page 27: ...ILURE OF POWER LED POW ER CORD SW CHECK P012VCC 5V CHECK WHEN OPEN GMS89C52 ON OFF CHECK IR CHECK X004 CHECK POW ER MODULE REPAIR N G N G LED CHECK X004 REPLACE N G GMS89C52 REPLACE REACTION IR LED RE...

Page 28: ...12 NO COLOR VIDEO VGA CABLE CHECK CH7001A IN OUT CHECK CH9294G XOUT CHECK VGA R G B CHECK CH9294G CRYSTAL REPLACE CH7001A REPLACE N G N G ARM7500 BOARD CHECK MATCHING R SW PUSH REPLACE RECONNECTION N...

Page 29: ...28 8 13 NO SOUND OUTPUT SOUND CONNECTOR CHECK PREFERENCE SOUND SETUP CHECK CS4333 IN OUT CHECK ARM7500 SOUND PORT CHECK N G N G ARM7500 REPLACE SOUND EFFECT CS4333 REPLACE...

Page 30: ...CONNECTOR CHECK SW PUSH IN OUT CHECK ARM7500 RGB CHECK CH9294G VIDCLK CHECK N G ROM BOOTING CHECK SW PUSH REPLACE DRAM REPLACE CHECK ARM7500 REPLACE N G CH9294G REPLACE N G SOFT UPGRADE FLASH ROM REP...

Page 31: ...W 4 DSN 300A 1 M4031 4924700300 BOX CARTON SW 2 DSN 300A 1 M404 4924700200 BOX MASTER SW 4 0 125 M405 4855800022 LABEL SERIAL ART 90 70X19 1 ZZ140 PTCACAJ565 CABINET AS DSN 300A 1 M201 4920100200 CABI...

Page 32: ...08 4859100480 JACK MODULAR 808M M6 1 P009 4859100480 JACK MODULAR 808M M6 1 P010 4859109550 JACK PIN BOARD LAP3000 0082 1 P011 4859109450 JACK PIN BOARD LAP3000 0083 1 P012 4859235120 CONN WAFER YW025...

Page 33: ...P CERA 50V CH 100PF J 2012 1 C009 HCFK103ZCA C CHIP CERA 50V Y5V 0 01MF Z 2012 1 C010 HCFK103ZCA C CHIP CERA 50V Y5V 0 01MF Z 2012 1 C011 HCFK103ZCA C CHIP CERA 50V Y5V 0 01MF Z 2012 1 C012 HCFK103ZCA...

Page 34: ...C CHIP CERA 50V Y5V 0 1MF Z 2012 1 C064 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 1 C065 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 1 C066 HCTBD100MB C CHIP TANTAL 10V 10MF M 3528 1 C067 HCFK103ZC...

Page 35: ...R206B FILTER EMI CHIP NFM51R00P20G 1 E002 HFE51R107B FILTER EMI CHIP NFM51R10P107 1 4859302510 WPLCC32S 1 4859302510 WPLCC32S 1 4859302610 WPLCC44S 1 I013 174HC377DP IC CHIP LOGIC 74HC377D 1 I017 1ARM...

Page 36: ...R CHIP 1 10 68 OHM J 2012 1 R064 HRFT242JCA R CHIP 1 10 2 4K OHM J 2012 1 R065 HRFT103JCA R CHIP 1 10 10K OHM J 2012 1 R070 HRFT103JCA R CHIP 1 10 10K OHM J 2012 1 R071 HRFT103JCA R CHIP 1 10 10K OHM...

Page 37: ...36 10 EXPLODED VIEW 10 1 DSN 300A...

Page 38: ...MFZN 11 4850G00210 MODEM AS 1 12 4922300300 SUPPORTER SPACE 1 NYLON 66 DASS 4N L OPTION 13 4920500100 COVER BACK 1 EGI PVC 14 CORD POWER AS 1 SPT 2AWG18 2C 1 8ME 15 97P2316600 HOLDER AS CORD 1 DACH 1...

Page 39: ...38 10 2 MODEL DSN 300S...

Page 40: ...5 PAN 3X8 MFZN 11 4850G00210 MODEM AS 1 12 4922300300 SUPPORTER SPACE 1 NYLON 66 DASS 4N L OPTION 13 4920500100 COVER BACK 1 EGI PVC 14 CORD POWER AS 1 15 97P2316600 HOLDER AC CORD 1 DACH 1 16 S W ROC...

Page 41: ...CTION DISKET 1 3 5 7 4924500100 BA POLY 1 LDPE TO 05 8 4924700300 BOX COVER 1 SW 2 9 KEY BOARD 1 10 REMOCON 1 11 CABLE RCA AS 3P 1 12 CABLE S VHS AS 1 13 4859000170 PLUG MODULAR AS 1 14 4855800022 LAB...

Page 42: ...41 11 SCHEMATIC DIAGRAM...

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Page 47: ...CS 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 PRINTED DATE MAY 1998 S...

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