Service Manual -- Fostex -- DS-8
Contents
1. 11 05 8 05 8 518 SRBV18 INPUT SEL TABLE CONTENTS qe 1 SPECIFICATIONS 4 12 2 CONTROLS INDICATORS AND CONNECTORS 4 3 EXPLODED VIEW ASSEMBLY AND PARTS LIST 5 dog 4 CIRCUIT amp BLOCK DIAGRAMS 9 Lr INPUT SEL 22020522 OUT4 INPUT SEL NOTES 8 Parts List and circuit diagrams are given in this manual to assist the service technician in maintaining the Model 05 8 The following accessories are supplied with DS 8 as the standard accessories E Owner s manual 8288449000 for export model pah 8288450000 for domestic model kas es AC adaptor AD 12A 8270727003 for USA CND 8270727006 for EUR 8270727007 for UK zi 8 8270727010 for JPN H 5 Na Following is the packing material for the Model DS 8 ali Carton inner DS 8 8228734000 1 Packing side 08 8 8228436000 Packing AC DS 8 8228437000 CAUTION Parts marked with this sign are safety critical components They must always be replaced with identical 14 ING 13 2 122. DS 8 amp E S 58 5 5 E Q zo 8 55 fn eu a Mas X 58 Ee J11 YKC21 3079 INPUT1 1 COAXIAL INPUT2 3 COAXIAL 1 jumper DGND L21 Uti GPIF37R1 INPUT3 OPTICAL U21 GPIF37R1 INPUT4 OPTICAL 931 GPIF37R1 INPUTS OPTICAL GPIF37R1 INPUTG OPTICAL GPIF37R1 INPUT7 OPTICAL U61 GPIF37R1 INPUTS OPTICAL 05 8 05 8 Parts List Ref No Part No Description Ref No Part No Description 8274 2430 00 PCB Assy Main DS 8 J002 8245 2720 17 Connector PI jack FPC 17P 8251 9661 01 Plain PCB Main DS 8 J004 N A 1005 8245 1711 03 Connector jack 8283 3P WHT ICs 1011 012 8245 3130 01 Connector PL jack RCA 2P BLK WS Ref No Part No Description 1 001 002 N A 0001 8236 0074 01 DIP DG CMOS 74HCU04 L011 021 0002 003 8236 0812 00 DIP DG CMOS 74 04 L012 022 0004 L013 023 8242 1860 13 Filter EMI LFW7B M3R2T U011 061 8245 5530 10 Connector opt GPIF37RI L014 024 8242 1860 13 Filter T EMI LFW7B M3R2T U012 062 8245 5520 10 Connector opt GPIF38T2 S001 8253 4610 01 S
3. Service Manual Model 05 8 DIGITAL AUDIO SELECTOR Fostex FOSteX FOSTEX CORPORATION 3 2 35 Musashino Akishima Tokyo Japan 196 0021 FOSTEX CORPORATION OF AMERICA 15431 Blackburn Ave Norwalk CA 90650 U S A PRINTED IN JAPAN OCT 1999 8288786000 05 8 05 8 CAUTION TO PREVENT ELECTRIC SHOCK MATCH SKOR WIDE BLADE OF PLUG TO WIDE SLOT DO NOT OPEN FULLY INSERT eem e 0 NUS DT ST T 59 55 55 55 56 5 5 5 5 5 5 55 x x CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK ATTENTION E ES Ri RE RE RE 2 2 DO NOT REMOVE COVER OR BACK POUR VITER LES CHOCS LECTRIGUES o9 o9 INTRODUIRE LA LA PLUS LARGE DE NO USER SERVICEABLE PARTS INSIDE LA FICHE DANS LA BORNE CORRE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL SPONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND The lightening flash with arrowhead symbol The exclamation point within an equilateral within an equilateral triangle is intended to triangle is intended to alert the user to the alert the user to the presence of uninsulated presence of important operating and mainte dangerous voltage within the product s en nance servicing instructions in the literature closure that may be of sufficient magnitude to accompanying the appliance 5 e 5 D Ls C constitute a r
4. 7 11 IN3 10 IN8 9 IN4 8 OUT8 7 OUTI 5 OUT2 4 OUT6 3 OUTS 2 OUT5 1 0074 6 SW PCB J2 17 components Refer to the Fostex Parts List and ensure exact replacement 10 3 DS 8 1 SPECIFICATIONS INPUT 1 2 COAXIAL IN Connector RCA pin jack Input Impedance 75 Q Normal Input Level 0 5 Vp p Format S P DIF IEC60958 part 3 INPUT 3 8 OPTICAL IN Connector Square shape optical Format S P DIF IEC60958 part 3 OUTPUT 1 2 COAXIAL OUT Connector RCA pin jack Input Impedance 75 Q Normal Input Level 0 5 Vp p Format S P DIF IEC60958 part 3 OUTPUT 3 8 OPTICAL OUT Connector Square shape optical Format S P DIF IEC60958 part 3 DC IN 12 V Inner Plus Outer Minus SAMPLING FREQUENCY 32 kHz 96 kHz DIMENSIONS 44 H x 482 W x 113 D mm WEIGHT 1 4 kg excluding accessories POWER REQUIREMENT JPN 100 V AC USA CND 120V AC UK EUR 230 V AC POWER SUPPLY Fostex AC adaptor AD 12A Specifications and appearance are subject to change without notice for product improvement 2 CONTROLS INDICATORS amp CONNECTORS FRONT PANEL gt OUTPUT 8 OUTPUT 1 T 05 8 S P DIF DIGITAL AUDIO SELECTOR EI INPUT SELECTOR Weurz meurs Pura 0
5. lt am 2 Poi BE E Su 5 Na 2x Sa 5 c N 56 o9 55 o9 6 o9 50 o9 55 o9 56 o9 ince 1 E 1 1 1 1 ge e sx E e J4 amp 1 l l l gt L L L L L l l af af l af gt af gt 9 t 4 lt t c t 1 5 E E 5 TEE d d d 2 Tp b nd npe ind Nos oc a 5 a 5 2 2 5 Se S 85 2 2 8 gt gt 5 gt 6 PO PO gt 2E AR a a a a a a 5 5 N e 3 5 3 5 5 8 RE 58 89 98 89 ug 58 NS 5I 3r sr Sr 5 59 2 Ja s Er BEI us s TOUT 5 5 vin 28 ug 8 99 28 S Q 5 5 5 5 Sino 2 7 Tha e t t SINO Y 2110 5 Zino 8 TINO T 81no 8 TNI 6 0 EN EF zx IND ST SNI 9 z Ng os os
6. adaptor AD 12A 100V JPN 5 8274 2440 00 PCB assy Regulator DS 8 11 8226 0191 00 Escutcheon B 6 8274 2430 00 PCB assy MAIN DS 8 12 8216 6570 00 Spacer escutcheon 7 8226 0130 02 Button push B NO8 13 8276 8396 05 Cable flat FFC 17P L50 8 8221 2220 00 Chassis DS 8 DP 8 Included in MAIN PCB assy 9 8226 1870 02 Knob VR W N19 14 8216 6920 00 Sheet volume DS 8 DP 8 BBT 3x8 P 3x6 BZn Wd 3x5 CZn 3x8 BZn BBT 3x6 BZn 05 8 05 8 E lt A try M YS L INA Xx DG L ra pas E g 4 2006 Xy IY X Y X s ss god MS HOLV n93H NIYIN JO 105 8 4 07 6 800 9961828 X91503 e Qs 8 dQ NIV A 100 9961628 X91503 C D i5 5 e 19n 0 0 0 8 S99 58 y 259 ggg gagi o 06 CI ds BAR n 6 y 0001 000 20009 00004 1000290210142 25 sAsse god MS HOLV If193H NIYIN JO 9pIS SMEd e sariawassv aod 8 5 e
7. 32 1431 06 VT ALU 16V l0uF 2095 SME vB No Part No Description C006 007 8232 8181 04 VT CER 25V O IuF 80 20 YF 5011 081 8253 4600 01 SW rotary 1 8 non shortening SRBV18 C008 009 N A J003 8245 2721 17 Connector PL jack FPC 17P C011 021 8232 8012 20 VT CER 50V 22pF 5 SL NA C012 022 8232 8014 70 CER 50V 47pF 5 SL E101 102 NA 013 063 8232 8181 04 CER 25 0 1 80 20 YF C014 024 8232 8181 04 CER 25V 0 1 80 20 YF 015 065 8232 8181 04 VT CER 25V 0 1 80 2096 YF C016 026 8232 1443 36 ALU 25V 33yF 20 SME VB Abbreviation C017 027 8232 1443 36 ALU 25V 33uF 20765 SME VB pp Dual In Line H Horizontal mount MISCELLANEOUS V Vertical mount Ref No No Description T Taping device Y201 8276 8730 02 Tube UL black 1 105 PE Penetrate mount I form straight Jumper F3 PL Penetrate mount L form right angle E202 Jumper F10 DG Digital J001 8245 5410 00 Connector jack DC inlet YKB31 0012 DS 8 3 EXPLODED VIEW PCB ASSEMBLY AND PARTS LIST DS 8 OVERALL EXPLODED VIEW amp PARTS LIST Ref No Part No Description Ref No Part No Description 1 8221 2230 00 Cover DS 8 DP 8 10 8270 7270 03 AC adaptor AD 12A 120V USA CND 2 8221 3090 00 Panel dress DS 8 8270 7270 06 AC adaptor AD 12A 230V EUR 3 8221 3100 00 Panel rear DS 8 8270 7270 07 AC adaptor AD 12A 240V UK 4 8274 2450 00 PCB assy SW DS 8 8270 7270 10 AC
8. Fostex oc 73 Lej cz Lr Ci 6 6 6 6 d cG D O90 S P DIF INPUT J CJ LJ S P DIF OUTPUT INPUT SELECTOR INPUT SELECTOR 1 8 Input connector 8 S P DIF INPUT 8 Output connector 8 S P DIF OUTPUT 8 Power switch POWER LED POWER Input connector 1 2 S P DIF INPUT 1 2 Input connector 3 7 S P DIF INPUT 3 7 Output connector 1 2 S P DIF OUTPUT 1 2 Output connector 3 7 S P DIF OUTPUT 3 71 DC IN connector DC IN 12V gt 4 CIRCUIT amp BLOCK DIAGRAMS MAIN REGULATOR PCB J12 D 5 YKC21 3079 2 sr 8 8 o A 44 g lt 5 a 85 E 7 5 zs lt S 5 E T T 2 2 5 2 S m 2 5 1 m Oct 2 512 cm 28 9 e an 9 m 55 ES 85 55 2 w xt Q0 T e 2 gt 5 a se o Ez Ez 88t 34 C 34 EE ea 2 58 59 24 88 86 298 a NG 5 OO Ek hi la e e J e t 5 8 a 5 5 gt 5 8 bord B 58 2 2 eF e oQ D o8 5 8 99 8 g9 8 29 8 29 8 g9 8 29 Ta
9. iance is not defeated 5 Ps 2 1 2 near water for example near a bathtub washbowl 12 Power Cord Protection Power supply cords should be kitchen sink laundry tub in a wet basement or near a routed so that they are not likely to be walked on or swimming pool and the like pinched by items placed upon or against them paying AN JAN N AN 6 Carts and Stands The appliance should be used only particular attention to cords at plugs convenience recep with a cart or stand that is recommended by the manufac tacles and the point where they exit from the appliance turer 13 Cleaning The appliance should be cleaned only as rec ommended by the manufacturer 14 Periods The power cord of the appliance should C be unplugged from the outlet when left unused for a long period of time T T T T T 15 Object and Liquid Entry Care should be taken so that LE E lt is E z AWE objects do not fall and liguids are not spilled into the en 3 5 50 50 E o 50 50 closure through openings zo zo 50 gt 50 Sa 50 z m m 3 0 LO lt lt An appliance and cart combination should be moved with 16 Damage requiring Service The appliance should be ser LI LI viced by qualified service personnel when care Quick stops excessive force and uneven surfaces NE A The power supply cord or the plug has been damaged may cause the appliance and ca
10. isk of electric shock to persons 9 7 5 7 5 5 5 7 WARNING a i i ur 1 LLI LLI LLI LLI LLI LLI LLI LLI REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK 0 0 0 0 0 0 0 0 DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOIS KN Ko Em TURE 2 r 2 js D 2 r 2 r Z O zo 210 zo zo 210 zo Z O SAFETY INSTRUCTIONS 0049090900 999 99950009 9999 000 9000 000000 099040909 1 Read instructions All the safety and operating instruc 9 Heat The appliance should be situated away from heat tions should be read before the appliance is operated Sources such as radiators heat registers stoves or other 2 Retain instructions The safety and operating instructions appliances including amplifiers that produce heat should be retained for future reference 10 Power Sources The appliance should be connected to a 3 Heed warnings All warnings on the appliance and in the power supply only of the type described in the operating operating instructions should be adhered to instructions or as marked on the appliance i i i i i i 4 Follow instructions All operating and use instructions 11 Grounding or Polarization The precautions that should 9 z 2 should be followed be taken so that the grounding or polarization means of 2 2 2 5 Water Moisture appliance should not be used an appl
11. rt combination to over oi turn 2 7 Wall or Ceiling Mounting The appliance should be B Objects have fallen or liquid has been spilled into the lt 5 appliance or tc mounted to a wall or ceiling only as recommended by the 2 mainutactunof C The appliance has been exposed to rain or 3 lt 8 Ventilation The appliance should be situated so that its D The appliance tOoperate narmally or E exhibits a marked changed in performance or a location or position does not interfere with its proper ven Ms E The appliance has been dropped or the enclosure tilation For example the appliance should be situ d amaded ated on bed sofa rug or similar surface that may block m abes Oo EAM MA 17 Servicing The user should not attempt to service the ap the ventilation openings or placed in a built in installa mE l pliance beyond that described in the operating instruc ea tion such as a bookcase or cabinet that may impede the D Kis aT 5 tions All other servicing should be referred to qualified flow of air through the ventilation openings Service personnel
12. witch P push power SDDL 011 021 8242 2350 00 Transformer digital out K7 T DIODEs W003 004 Jumper F5 Ref No Part No Description W401 8276 8396 05 Cable flat FFC 17P L50 D001 8234 0196 02 HT DSKIOC BT D002 8234 0201 00 Opt V LED green GLK3KG8 011 021 8234 5007 00 155136 D012 022 8234 5007 00 155136 REGULATOR Ref No Part No Description RESISTORs 8274 2440 00 Assy Regulator DS 8 Ref No No Description 8251 9660 02 Plain Regulator DS 8 R001 8230 1384 71 HT Carbon 1 4W 4700 5 R011 021 8230 1387 50 Carbon I 4W 750 5 Ref No Part No Description R012022 8230 1381 TER Carbon di 100 506 U091 8236 0320 01 IC 220 AN regulator 78 5 R013 02382301384 V3 HT Garbon HAWA IKO 37 C091 092 8232 8181 04 Capacitor VT CER 25V 0 1pF R014 024 8230 1382 22 HT Carbon 1 4W 2 2kQ 5 80 20 YF R015 065 8230 1383 32 HT Carbon 1 4W 3 3kQ 5 WO01 8276 7730 10 Cable assy WHTMT F MT BS L100 R016 066 8230 1382 22 HT Carbon 1 4W 2 2kQ 5 E101 102 N A R017 067 Jumper F5 R018 028 8230 1387 50 Carbon I 4W 750 5 lt SW assys ALU Electrolytic type CER Ceramic type Ref No Part No Description Ref No No Description 9213290 00 C001 8232 1451 06 VT ALU 35V 10uF 20 SME VB 23 T 2690 03 Plain PCB C002 8232 1421 07 ALU 10V 100pF 20 SME VB 003 005 82
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