Fostex-VC8-adat-sm维修电路原理图.pdf

Service Manual Model VC-8 ADAT/ANALOG Converter RadioFans.CN 收音机爱 好者资料库 SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. POUR VITER LES CHOCS LECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRE- SPONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND. CAUTION: ATTENTION: The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and mainte- nance (servicing) instructions in the literature accompanying the appliance. The lightening flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the products enclo- sure that may be of sufficient magnitude to constitute a risk of electric shock to persons. “WARNING” “TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.” CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. 1.Read instructions - All the safety and operating instructions should be read before the appliance is operated. 2.Retain instructions - The safety and operating instructions should be retained for future reference. 3.Heed warnings - All warnings on the appliance and in the oper- ating instructions should be adhered to. 4.Follow instructions - All operating and use instructions should be followed. 5.Water and Moisture - The appliance should not be used near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like. 6.Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufacturer. An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to overturn. 7.Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer. 8.Ventilation - The appliance should be situated so that its lo- cation or position does not interfere with its proper ventila- tion. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventila- tion openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings. 9.Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other ap- pliances (including amplifiers) that produce heat. 10.Power Sources - The appliance should be connected to a power supply only of the type described in the operating in- structions or as marked on the appliance. 11.Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appli- ance is not defeated. 12.Power Cord Protection - Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance. 13.Cleaning - The appliance should be cleaned only as recom- mended by the manufacturer. 14.Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. 15.Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings. 16.Damage requiring Service - The appliance should be serviced by qualified service personnel when: A.The power supply cord or the plug has been damaged; or B.Objects have fallen, or liquid has been spilled into the appliance; or C.The appliance has been exposed to rain; or D.The appliance does not appear to operate normally or exhibits a marked changed in performance; or E.The appliance has been dropped, or the enclosure damaged. 17Servicing - The user should not attempt to service the appli- ance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel. RadioFans.CN 收音机爱 好者资料库 VC-8 3 TABLE OF CONTENTS NOTES * Parts List and circuit diagrams are given in this manual to assist the service technician in maintaining the Model VC-8. * The following accessories are supplied with VC-8 as the standard accessories. Owners manual, VC-8, MLT: 8288444000 AC adaptor AD-12A: 8270727003 (for USA/CND) : 8270727006 (for EUR) : 8270727007 (for UK) : 8270727010 (for JPN) * Following is the packing material for the Model VC-8. PACK, SIDE, L, DE-1: 8228454000 PACK, SIDE, R, DE-1: 8228455000 CARTON, INNER, VC-8: 8228727000 CARTON, OUTER, VC-8: 8228906000 1. SPECIFICATIONS.4 2. CONTROLS, INDICATORS AND CONNECTORS.5 3. EXPLODED VIEW.6 4. PARTS LIST.8 5. PCB PATTERN DRAWING.10 6. CIRCUIT DIAGRAMS .12 CAUTION Parts marked with this sign are safety critical components. They must always be replaced with identical components. Refer to the Fostex Parts List and ensure exact replacement. RadioFans.CN 收音机爱 好者资料库 VC-8 4 1. SPECIFICATIONS (Specification Unit : 0 dBV = 1 Vrms) INPUT 18 ConnectorRCA pin jack Input Impedance20k or more Input Level-10dBV OUTPUT 18 ConnectorRCA pin jack Load Impedance10k or more Output Level-10dBV DATA IN/OUT ConnectorSquare shape optical FormatIEC60958 (S/P DIF) ALESIS Proprietary Multi Channel Optical Interface WORD IN ConnectorBNC type Input ImpedanceTerminate switch ON: 75 Terminate switch OFF : Hi impedance Input LevelHi Level : 3.55V Lo Level : 01V DIGITAL SECTION Quantization20-bit linear AD Converter20 bit 64 times over sampling modulation DA Converter20 bit 128times over sampling modulation Sampling FrequencyINT mode: 44.1kHz OPTICAL/WORD mode : 3248kHz CHARACTERISTICS Overall Frequency Responce+1, -2dB (20Hz20kHz) Dynamic Range (overall)90dB or more T.H.D.0.008% or less (at 1kHz,+2dB) Channel Separation80dB or more (at 1kHz) S/N (overall)90dB or more Phase Difference between Channel20 or less Click NoisePower ON/OFF : -20dBV or less GENERAL Dimensions220 (W) x 43 (H) x 200 (D) mm Weight1.0kg (Excluding accessories) Power SupplyDC12V, 600mA, Exclusive AC Adaptor (AD-12A) * Specifications and appearance are subjects to change without notice for product improvement. * Adat and the marks are trademarks of Alesis Corporation. RadioFans.CN 收音机爱 好者资料库 VC-8 5 2. CONTROLS, INDICATORS AND CONNECTORS 1.WORD IN terminate switch 2.LOCKED LED 3.CLOCK select switch 4.ANALOG INPUT MODE switch 5.DIGITAL MODE select switch 6.POWER switch 7.POWER LED 8.DC IN jack Center: Plus + 9.ANALOG INPUT connectors 18 RCA 10.ANALOG OUTPUT connectors 18 RCA 11.WORD IN connector BNC 12.DIGITAL INPUT connectors Square shape optical 13.DIGITAL OUTPUT connectors Square shape optical 75 OFFON ANALOG INPUT MODECLOCKDIGITAL MODE ADAT/ANALOG CONVERTER POWER WORD 1-41-81-2ONSTBYINT(44.1k)OPTICAL LOCKED S/P DIFADAT OPTICAL 5432167 AD-12A ONLY IN OUT WORD INDIGITAL OUTIN54321 54321 ANALOG 76 768 8 12V DC IN OPTICAL 89 10 111312 RadioFans.CN 收音机爱 好者资料库 VC-8 6 3. EXPLODED VIEW 1 2 3 5 4 B3x6 CZn B3x6 BZn BBT3x8 BZn BBT3x8 BZn BBT3x8 BZn BBT3x8 BZn BBT3x8 BZn BBT3x8 BZn BBT3x8 BZn RadioFans.CN 收音机爱 好者资料库 VC-8 7 Ref. No.Part No.Description 18221288000PANEL ,TOP, DE-1 28270727003AC ADAPTOR, AD-12A, USA/CND 8270727006AC ADAPTOR, AD-12A, EUR 8270727007AC ADAPTOR, AD-12A, UK 8270727010AC ADAPTOR, AD-12A, JPN 38274201000PCB_ASSY, VC-8 48221291000CHASSIS, VC-8 58221290000PANEL, FRONT, VC-8 8260561000FOOT_ASSY, S CAUTION : The “PARITY SW (S001)” on the MAIN PCB assy must be set “ON”. RadioFans.CN 收音机爱 好者资料库 VC-8 8 MAIN PCB ASSY Ref. No.Part No.Description 8274201000PCB_ASSY, VC-8 B1018251525200PLAIN_PCB, VC-8 ICs Ref. No.Part No.Description U0018236541610ST, AN, REGULATOR, UPD29M10T U002004 8236540301ST, AN, REGULATOR, L78M05T-TL U0058236545904ST, TSSOP, 74VHCU04 U0068236085000QFP, DG, GATE_ARRAY, DIF U0078236502500ST, AN, RESET, NJM2103M U008, 0098236545163ST, TSSOP, TC74VHC163 U010, 0118236545153ST, TSSOP, TC74VHC153 U0128236503400ST, DG, VCO, TC9246F U013, 0148236570101ST, DG, DRIVER, DTC114EK U015017 8236545074ST, TSSOP, 74VHC74 U0188236545000ST, TSSOP, 74VHC00 U0198236545161ST, TSSOP, 74VHC161 U0208236545086ST, TSSOP, 74VHC86 U021, 0228236570101ST, DG, DRIVER, DTC114EK U0238236570801ST, DG, DRIVER, DTB114TK U0248236545074ST, TSSOP, 74VHC74 U0258236545904ST, TSSOP, 74VHCU04 U0268236503400ST, DG, VCO, TC9246F U0278236570401ST, DG, DRIVER, DTA114EK U029, 0308236545157ST, TSSOP, 74VHC157 U0318236545000ST, TSSOP, 74VHC00 U0328236541300ST, AN, DC-DC, NJM2360AM U034, 0358236570401ST, DG, DRIVER, DTA114EK U101801 8236505011ST, AN, OPAMP, NJM2115M(TEI) U151451 8236541700ST, DG, ADDA, AK4522 U153453 8236541200ST, AN, OPAMP, NJM4565M U157857 8236570201ST, DG, DRIVER, DTC314TK DIODEs Ref. No.Part No.Description D0018234101400OPT, VT, LED, GRN, LT3K8B D0028234502800D, ST, DAN202K D0038234750600D, ST, RB400D D004non D0058234202700OPT, V, LED, GRN-RED, GL3ED8 D006, 0078234502800D, ST, DAN202K D0088234108400D, VT, SCHOTTKEY, EK03W D0090118234502800D, ST, DAN202K RESISTORs Ref. No.Part No.Description R0018230500681ST, CARBON, 1/10W, 680, 5% R0028230500101ST, CARBON, 1/10W, 100, 5% R0038230500332ST, CARBON, 1/10W, 3.3K, 5% R0048230500222ST, CARBON, 1/10W, 2.2K, 5% R0058230500105ST, CARBON, 1/10W, 1M, 5% R0068230500000ST, CARBON, 1/10W, 0, 5% R0078230500101ST, CARBON, 1/10W, 100, 5% R0088230500561ST, CARBON, 1/10W, 560, 5% RESISTORs Ref. No.Part No.Description R0098230500331ST, CARBON, 1/10W, 330, 5% R0108230500101ST, CARBON, 1/10W, 100, 5% R0110138230500103ST, CARBON, 1/10W, 10K, 5% R0148230500101ST, CARBON, 1/10W, 100, 5% R0158230500751ST, CARBON, 1/10W, 750, 5% R0168230500472ST, CARBON, 1/10W, 4.7K, 5% R017non R0188230500331ST, CARBON, 1/10W, 330, 5% R019non R020, 0218230500101ST, CARBON, 1/10W, 100, 5% R022non R0238230500102ST, CARBON, 1/10W, 1K, 5% R024, 0258230500103ST, CARBON, 1/10W, 10K, 5% R0268230508101R, ST, ARRAY, 100 x4, 5%, CN1J4 R0278230500101ST, CARBON, 1/10W, 100, 5% R0298230500103ST, CARBON, 1/10W, 10K, 5% R0308230500222ST, CARBON, 1/10W, 2.2K, 5% R031, 0328230500102ST, CARBON, 1/10W, 1K, 5% R033, 0348230500104ST, CARBON, 1/10W, 100K, 5% R0358230500561ST, CARBON, 1/10W, 560, 5% R0368230500152ST, CARBON, 1/10W, 1.5K, 5% R0378230500224ST, CARBON, 1/10W, 220K, 5% R038, 0398230500101ST, CARBON, 1/10W, 100, 5% R0408230500681ST, CARBON, 1/10W, 680, 5% R0410438230500101ST, CARBON, 1/10W, 100, 5% R0448230500681ST, CARBON, 1/10W, 680, 5% R0458230500104ST, CARBON, 1/10W, 100K, 5% R0488230500104ST, CARBON, 1/10W, 100K, 5% R0498230500103ST, CARBON, 1/10W, 10K, 5% R050, 0518230500101ST, CARBON, 1/10W, 100, 5% R0548230500103ST, CARBON, 1/10W, 10K, 5% R0558230500101ST, CARBON, 1/10W, 100, 5% R0568230500750ST, CARBON, 1/10W, 75, 5% R0578230500103ST, CARBON, 1/10W, 10K, 5% R0588230500159ST, CARBON, 1/10W, 1.5, 5% R0598230500105ST, CARBON, 1/10W, 1M, 5% R060, 0618230500561ST, CARBON, 1/10W, 560, 5% R0628230500103ST, CARBON, 1/10W, 10K, 5% R063, 0648230500473ST, CARBON, 1/10W, 47K, 5% R0658230500101ST, CARBON, 1/10W, 100, 5% R1018018230500183ST, CARBON, 1/10W, 18K, 5% R1028028230500752ST, CARBON, 1/10W, 7.5K, 5% R1038038230500103ST, CARBON, 1/10W, 10K, 5% R1048048230500103ST, CARBON, 1/10W, 10K, 5% R1058058230500331ST, CARBON, 1/10W, 330, 5% R1068068230500331ST, CARBON, 1/10W, 330, 5% R1098098230500104ST, CARBON, 1/10W, 100K, 5% R1118118230500103ST, CARBON, 1/10W, 10K, 5% R1128128230500123ST, CARBON, 1/10W, 12K, 5% R1138138230500222ST, CARBON, 1/10W, 2.2K, 5% R1148148230500104ST, CARBON, 1/10W, 100K, 5% R1514518230500100ST, CARBON, 1/10W, 10, 5% R1524528230500101ST, CARBON, 1/10W, 100, 5% R1534538230500100ST, CARBON, 1/10W, 10, 5% R1568568230500101ST, CARBON, 1/10W, 100, 5% 4.PARTS LIST RadioFans.CN 收音机爱 好者资料库 VC-8 9 CAPACITORs ALU = Electrolytic type CER = Ceramic type Ref. No.Part No.Description C0010038232143106VT, ALU, 16V, 10F, 20%, SME-VB C0048232142107VT, ALU, 10V, 100F, 20%, SME-VB C0050088232143106VT, ALU, 16V, 10F, 20%, SME-VB C0098232143477VT, ALU, 16V, 470F, 20%, SME-VB C0100128232143106VT, ALU, 16V, 10F, 20%, SME-VB C0130208233502104ST, CER, 50V, 0.1F, +80, CC20F C0210248233504103ST, CER, 25V, 0.01F, 10%, CC20R C0258233500471ST, CER, 50V, 470pF, 5%, CC20SL C026, 0278233504103ST, CER, 25V, 0.01F, 10%, CC20R C028, 0298233500471ST, CER, 50V, 470pF, 5%, CC20SL C0300348233504103ST, CER, 25V, 0.01F, 10%, CC20R C0358233502104ST, CER, 50V, 0.1F, +80, CC20F C0360428233504103ST, CER, 25V, 0.01F, 10%, CC20R C043, 0448233500101ST, CER, 50V, 100pF, 5%, CC20SL C0458233500470ST, CER, 50V, 47pF, 5%, CC20SL C0468233504103ST, CER, 25V, 0.01F, 10%, CC20R C047, 0488233500220ST, CER, 50V, 22pF, 5%, CC20SL C0490518233504103ST, CER, 25V, 0.01F, 10%, CC20R C0528233500150ST, CER, 50V, 15pF, 5%, CC20SL C0538233509474ST, CER, 25V, 0.47F, 20%, KC30E C0548233504103ST, CER, 25V, 0.01F, 10%, CC20R C0558232144107VT, ALU, 25V, 100F, 20%, SME-VB C0568233504103ST, CER, 25V, 0.01F, 10%, CC20R C0578232142107VT, ALU, 10V, 100F, 20%, SME-VB C0588233502104ST, CER, 50V, 0.1F, +80, CC20F C0590628233504103ST, CER, 25V, 0.01F, 10%, CC20R C0638233500222ST, CER, 50V, 0.0022F, 5%, CC20SL C0648232143107VT, ALU, 16V, 100F, 20%, SME-VB C0658232143476VT, ALU, 16V, 47F, 20%, SME-VB C0668233504103ST, CER, 25V, 0.01F, 10%, CC20R C067non C068, 0698233504103ST, CER, 25V, 0.01F, 10%, CC20R C0708232143106VT, ALU, 16V, 10F, 20%, SME-VB C0718233504103ST, CER, 25V, 0.01F, 10%, CC20R C0728233502104ST, CER, 50V, 0.1F, +80, CC20F C0738233509474ST, CER, 25V, 0.47F, 20%, KC30E C0748233504103ST, CER, 25V, 0.01F, 10%, CC20R C0758233500150ST, CER, 50V, 15pF, 5%, CC20SL C0768233500470ST, CER, 50V, 47pF, 5%, CC20SL C0778232357477VT, ALU, 16V, 470F, 20%, LXV, D10 C0788233504103ST, CER, 25V, 0.01F, 10%, CC20R C0790818233502104ST, CER, 50V, 0.1F, +80, CC20F C1018018232143106VT, ALU, 16V, 10F, 20%, SME-VB C1028028233500152ST, CER, 50V, 0.0015F, 5%, CC20R C1038038233504103ST, CER, 25V, 0.01F, 10%, CC20R C1048048233504103ST, CER, 25V, 0.01F, 10%, CC20R C107807non C108808non C1118118232143106VT, ALU, 16V, 10F, 20%, SME-VB C1128128233500681ST, CER, 50V, 680pF, 5%, CC20SL C1134138233504103ST, CER, 25V, 0.01F, 10%, CC20R CAPACITORs Ref. No.Part No.Description C1148233504103ST, CER, 25V, 0.01F, 10%, CC20R C115815non C1168168232143107VT, ALU, 16V, 100F, 20%, SME-VB C1514518232143106VT, ALU, 16V, 10F, 20%,