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NAD L 70 Service Manual

Av surround sound dvd receiver
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See also: Owner's Manual
DRAFT DATE: 20 Jan 2004
NAD
L 70
AV SURROUND
SOUND DVD RECEIVER

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Summary of Contents for NAD L 70

  • Page 1 DRAFT DATE: 20 Jan 2004 L 70 AV SURROUND SOUND DVD RECEIVER...

  • Page 2: Identification Of Controls

    Identification of controls FRONT PANEL Identification of controls REAR PANEL ATTENTION! Please make all connections to your L70 receiver with the unit unplugged. (It is also advisable to power-down or unplug all associated components while making or breaking any signal or AC power connections.) 120 VOLT NORTH AMERICAN VERSION ONLY...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES..................1-4 SERVICING PRECAUTIONS ........................1-5 * General Servicing Precautions * Insulation checking prodedure * Electrostatically Sensitive Devices SPECIFICATIONS ............................1-6 DISASSEMBLY .............................. 1-7 PRINCIPAL PART LOCATION ........................1-8 RESET PROCEDURES ..........................1-8 EXPLODED VIEW ..........................

  • Page 4: Product Safety Servicing Guidelines

    PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S. ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE WITHOUT MANUFACTURER’S APPROVAL. UNAUTHORIZED EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.

  • Page 5: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION : Before servicing the A/V Receiver covered by this Electrostatically Sensitive (ES) Devices service data and its supplements and addends, read and follow the Some semiconductor (solid state) devices can be damaged easily by SAFETY PRECAUTIONS. NOTE : if unforeseen circumstances static electricity.

  • Page 6: Specifications

    SPECIFICATIONS Amplifier Section FM Tuner Section (Without notes 100.1 MHz, 65 dBf) Output Power (Front) : F.T.C Rating: Tuning Range : 60 watts RMS per channel minimum, both channels 87.5 MHz - 108.0 MHz C: 50 kHz steps driven into 8 ohms from 20 Hz to 20kHz with no AH: 100 kHz steps more than 0.09% total harmonic distortion AM Suppression Ratio: C: 50 dB...

  • Page 7: Disassembly

    DISASSEMBLY 1> REMOVAL OF TOP COVER 2> REMOVAL OF FRONT PANEL...

  • Page 8: Principal Part Location

    PRINCIPAL PARTS LOCATION RESET PROCEDURE FOR Receiver Functions Only: Press Play then Stop then the FM/AM key, holding in the FM/AM key for more than 5 seconds. RESET PROCEDURE FOR DVD-Player Functions Only: Select DEFAULTS to restore factory defaults. The factory default password is 1234.

  • Page 9: Exploded View

    (L70AH) EXPLODED VIEW C S 10 S 17 S 15 S 10 S16 X4 S 11 S 10 C MX1A140 B AR R IE R C MX1A139 INS ULAT OR C UP 11556-2 S UB T R ANS AS S 'Y COP11555 L70 PCB AMP ASSEMBLY S 15...
  • Page 10 SECTION 2 ELECTRICAL CONTENTS CONTENTS IC BLOCK DIAGRAMS & PIN DESCRIPTION ................2-12 ~ 2-34 DIAGRAMS ..............................2-35 1. BLOCK DIAGRAM ..........................2-35 2. WIRING DIAGRAM ..........................2-37 3. SCHEMATIC DIAGRAM ........................2-39 FRONT & µ-COM PART......................2-39 INPUT & VOLUME PART......................2-41 DSP &...
  • Page 11 IC PIN FUNCTION (IC81 : TMP87PS71AF(OTP)-ANAM 1359DAT(MICOM) PIN No. SYMBOL DESCRIPTION OSD_H OSD INPUT SENSING PORT REMOTE REMOTE CONTROL DATA INPUT PORT RDS_CK CLK/DATA PORT FOR RDS IC(SA6579TV1) RDS_DA F_MUTE FUNCTION MUTE CONTROL OUTPUT PORT("H") EVOL_DA DATA / CLK / CHIP ENABLE CONTROL PORT FOR ELECTRONIC VOL. IC(M62446AFP) EVOL_CK EVOL_CE TEST...

  • Page 12: Diagrams

    u-COM IC PIN ASSIGNMENT & BLOCK DIAGRAM PIN ASSIGNMENTS (TOP VIEW) 54 53 52 51 50 49 48 47 46 45 44 43 42 41 (SIS) P97 P66 (G9) P65 (G10) (KEY0) P40 P64 (G11) (KEY1) P41 P63 (G12) (KEY2) P42 P62 (G13) (KEY3) P43 P61 (G14)

  • Page 13: Top View

    PIN ASSIGNMENT.(IC41: CS493264) DGND1 MCLK AUDATA3, XMT958 SCLK WR,DS,EMWR,GPIO10 LRCLK RD,R/W,EMOE,GPIO11 AUDATA0 A1,SCDIN AUDATA1 A0,SCCLK AUDATA2 6 5 4 3 2 1 44 43 42 41 40 DATA7,EMAD7,GPIO7 DATA6,EMAD6,GPIO6 DATA5,EMAD5,GPIO5 RESET DATA4,EMAD4,GPIO4 AGND CS493XX-CL 44-pin PLCC Top View DGND2 FILT1 DATA3,EMAD3,GPIO3 FILT2 DATA2,EMAD2,GPIO2...
  • Page 14 AUDIO DSP(CS49326 : IC41) PIN No. Pin Name Function 1,12,23 +VD1 Digital Power supply. Normally +2.5v 2,13,24 DGND Digital Ground AUD3 SPDIF transmitter output/Digital audio output(N.C) Host write strobe pin(connected to GND with an external resistor) Host parallel output enable pin(pulled up with an external resistor) CS_DA SPI Serial data input pin CS_CK...
  • Page 15 NJU3713 (IC28 : EXPANDER / MAIN) DATA BLOCK DIAGRAM DATA Controller Circuit 2-16...
  • Page 16 PIN ASSIGNMENT (IC42: AK4586) XTI/EXTCLK DVDD ROUT1 DVSS LOUT1 TVDD ROUT2 AK4586VQ LOUT2 MCKO ROUT3 Top View LRCK LOUT3 BICK DZF1 SDTO VCOM SDTI1 VREFH BLOCK DIAGRAM (IC42: AK4586) Audio X’tal µP I/F Oscillator MCLK Clock MCKO Generator Clock Recovery LOUT1 DATT DAIF...
  • Page 17 PIN/FUNCTION (IC42: AK4586) 2-18...
  • Page 18 NJM2296M (VIDEO SW / IC51, 52, 53) BLOCK DIAGAM (NJM2296M /MAIN IC96) Vin1 Vin2 Vout1 6.2dB dirver Vin3 6.2dB Vout2 dirver Vin4 6.2dB Vout3 dirver Vin5 OPA2134UA / NJM 2068MD (OP AMP / IC16~21, IC45~53) • PIN FUNCITON 1. A OUTPUT 2.
  • Page 19 TC9164AF (FUNCTION IC11) BLOCK DIAGRAM R-COM L-COM L-COM R-COM L-COM R-COM DATA SHIFT REGISTER TC9162AF (FUNCTION IC12) BLOCK DIAGRAM 2-20...
  • Page 20 M62446FP (ELECTRONIC VOLUME/INPUT : IC13) SYSTEM BLOCK DIAGRAM C in Cout SW in SWout SL in SLout volume SR in SRout BYPASS1 BYPASS2 tone L in Lout R in Rout µ-com interface volume LATCH DATA CLK PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM OUT4 DVDD OUT3...
  • Page 21 LC74763 (OSD IC54) Decoder 2-22...
  • Page 22 SAA6579TV1 (RDS FILTER IC82) 47 pF 82 pF 4.332/8.664 MHz 2.2 kΩ V DDD OSCI OSCO OSCILLATOR QUAL 57 kHz ANTI- signal QUALITY BIT RECONSTRUCTION BANDPASS ALIASING GENERATOR FILTER (8th ORDER) FILTER DIVIDER 330 pF SCOUT 560 pF BIPHASE COSTAS LOOP RDDA CLOCKED DIFFERENTIAN...
  • Page 23 (IC10, IC11 : SDRAM) 2-24...
  • Page 24 HY57V161610D 2-25...
  • Page 25 (ES4318 : IC01) 2-26...
  • Page 26 PIN GEOGRAPHY 2-27...
  • Page 27 2-28...

  • Page 28: Pin Description

    CS4955 (VIDEO ENCODER : IC14) PIN DESCRIPTION BLOCK DIAGRAM Output 10-Bit C Interface Interpolate Control 10-Bit Chroma Amplifier PDAT[7:0] CVBS Registers Host Parallel Chroma Modulate 10-Bit Interface ADDR Burst Insert XTAL_IN 10-Bit Color Sub-carrier Synthesizer XTAL_OUT Chroma Interpolate 10-Bit YCbCr to RBG Tel etext TTXDAT Color Space...
  • Page 29 2-30...
  • Page 30 HY29F400 (FLASH MEMORY : IC03) PIN CONFIGURATIONS BLOCK DIAGRAM DQ[15:0] A[17:0], A-1 STATE C O N T R O L ERASE VOLTAGE I/O BUFFERS G E N E R A T O R A N D DQ[15:0] S E C T O R S W I T C H E S C O M M A N D W E # REGISTER...
  • Page 31 HY29F400 SIGNAL DESCRIPTIONS t i b t i b s - i t i b s - i s - i t i r e l i t i r s - i l l a e l i e l i l l i d i l s i r...
  • Page 32 EEPROM : IC13 PIN CONFIGURATION PIN NAME Pin name I / O Function Power supply Ground (0V) A0, A1, A2 Out of use. Please connect to GND. Serial clock input Slave and word address, I / O serial data input, serial data output Wite protect pin * 1 An open drain output requires a pull-up resistor.
  • Page 33 TRANSISTOR, REGULATOR IC BLOCK DIAGRAM TO-92S TO-92 TO-220 TO-92L 1. Emitter 1. Emitter 1. Emitter 1. INPUT 2. Collector 2. Collector 2. Collector 2. OUTPUT 3. Base 3. Base 3. Base 3. GND 1 2 3 1 2 3 1 2 3 1 2 3 KRA102M KRC102M...

  • Page 34: Block Diagram

    1. BLOCK DIAGRAM 2-35 2-36...

  • Page 35: Wiring Diagram

    2. WIRING DIAGRAM 2-37 2-38...

  • Page 36: Schematic Diagram

    3. SCHEMATIC DIAGRAM FRONT & µ-COM PART 2-39 2-40...

  • Page 37: Input & Volume Part

    INPUT & VOLUME PART 2-41 2-42...

  • Page 38: Dsp & Codec Part

    DSP & CODEC PART 2-43 2-44...

  • Page 39: Video Part

    VIDEO PART 2-45 2-46...

  • Page 40: Amp Part

    AMP. PART 2-47 2-48...

  • Page 41: Power Part

    POWER PART 2-49 2-50...

  • Page 42: Dvd Back-End Part

    DVD BACK_END PART 2-51 2-52...

  • Page 43: Electrical Parts List

    SECTION 3 ELECTRICAL PARTS LIST RESISTORS AND CAPACITORS Notes : • Part numbers are indicated for most mechanical parts. Please use this part number for parts order. • IMPORTANT SAFETY NOTICE. Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacture's specified parts.
  • Page 44 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C905~C908 HCEA1CH101T CAPACITOR , ELECT 100uF 16V C909 HCEA1HH4R7T CAPACITOR , ELECT 4.7uF 50V C910 HCEA1HH470T CAPACITOR , ELECT 47uF 50V C911~C915 CCKT1H103ZF CAPACITOR , CERAMIC 0.01uF 50V ZF C916 HCEA1HH4R7T CAPACITOR , ELECT 4.7uF 50V C917~C919 CCKT1H103ZF...
  • Page 45 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R835 CRD20TJ101T RESISTOR , CARBON 100 OHM 1/5W J R836 CRD20TJ103T RESISTOR , CARBON 10K OHM 1/5W J R837 CRD20TJ222T RESISTOR , CARBON 2.2K OHM 1/5W J R838 CRD20TJ103T RESISTOR , CARBON 10K OHM 1/5W J R840, R841 CRD20TJ102T RESISTOR , CARBON...
  • Page 46 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R818 CRD20TJ182T RESISTOR , CARBON 1.8K OHM 1/5W J R819 CRD20TJ223T RESISTOR , CARBON 22K OHM 1/5W J RC81 HRVKSM603TH2 REMOTE SENSER KSM-603TH2 S809 HST1A019ZT SW , TACT S810~S817 CST1A012ZT SW , TACT SKHV10910G CUP11553-3 ENCODER PCB BN83...
  • Page 47 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C146~C151 HCUS1H470JA CAPACITOR , CHIP 47pF C152~C154 HCUS1E104ZF CAPACITOR , CHIP 0.1uF 25V C172, C173 HCUS1E104ZF CAPACITOR , CHIP 0.1uF 25V C175, C176 HCUS1E104ZF CAPACITOR , CHIP 0.1uF 25V C178, C179 HCEA1VH100T CAPACITOR , ELECT 10uF 35V C180~C183 HCUS1H470JA...
  • Page 48 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C419, C420 HCUS1E104ZF CAPACITOR , CHIP 0.1uF 25V C421, C422 HCUS1H330JA CAPACITOR , CHIP 33pF C423, C424 HCUS1E104ZF CAPACITOR , CHIP 0.1uF 25V C425~C428 HCUS1H101JA CAPACITOR , CHIP 100pF C429 HCUS1E104ZF CAPACITOR , CHIP 0.1uF 25V C431~C434 HCEA1CH101T...
  • Page 49 LOAD NO. PART NO. DESCRIPTION SPECIFICATION Q194, Q195 HVTKTD1304T TRANSISTOR , CHIP (MUTE) KTD1304 Q401, Q402 HVTKSC2316YT TRANSISTOR KSC2316Y R101~R106 HRJ10DJ471T RESISTOR , CHIP 70 OHM 1/10W R107~R112 HRJ10DJ102T RESISTOR , CHIP 1K OHM 1/10W R113~R118 HRJ10DJ224T RESISTOR , CHIP 220K OHM 1/10W R119~R125 HRJ10DJ473T...
  • Page 50 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R246 HRJ10DJ121T RESISTOR , CHIP 120 OHM 1/10W R247~R250 CRD20TJ331T RESISTOR , CARBON 330 OHM 1/5W J R251 HRJ10DJ471T RESISTOR , CHIP 470 OHM 1/10W R252 HRJ10DJ121T RESISTOR , CHIP 120 OHM 1/10W R253~R255 HRJ10DJ1R0T RESISTOR , CHIP 1 OHM 1/10W...
  • Page 51 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R434 HRJ10DJ0R0T RESISTOR , CHIP JUMPER R438~R440 HRJ10DJ1R0T RESISTOR , CHIP 1 OHM 1/10W R441 HRJ10DJ330T RESISTOR , CHIP 33 OHM 1/10W R442~R444 HRJ10DJ4R7T RESISTOR , CHIP 4R7 OHM 1/10W R445 HRJ10DJ331T RESISTOR , CHIP 330 OHM 1/10W R446 HRJ10DJ105T...
  • Page 52 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C577 HCUS1H181JA CAPACITOR , CHIP 180pF C578 HCUS1H470JA CAPACITOR , CHIP 47pF C579 HCEA1HH1R0T CAPACITOR , ELECT 1uF 50V C580, C581 HCEA1AH471T CAPACITOR , ELECT 470uF 10V C582, C583 HCUS1H820JA CAPACITOR , CHIP 82pF C584 HCEA1AH471T CAPACITOR , ELECT...
  • Page 53 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R561 HRJ10DJ393T RESISTOR , CHIP 39K OHM 1/10W R562 HRJ10DJ152T RESISTOR , CHIP 1K5 OHM 1/10W R563 HRJ10DJ682T RESISTOR , CHIP 6K8 OHM 1/10W R564, R565 HRJ10DJ102T RESISTOR , CHIP 1K OHM 1/10W R566 HRJ10DJ104T RESISTOR , CHIP 100K OHM 1/10W...
  • Page 54 LOAD NO. PART NO. DESCRIPTION SPECIFICATION Q590~Q594 HVTKTA1268GRT TRANSISTOR KTA1268GR Q596~Q598 HVTKTA1268GRT TRANSISTOR KTA1268GR Q641, Q642 HVTKTC3200GRT TRANSISTOR KTC3200GR Q644~Q646 HVTKTC3200GRT TRANSISTOR KTC3200GR Q647,Q648 HVTKTA1268GRT TRANSISTOR KTA1268GR Q650~Q652 HVTKTA1268GRT TRANSISTOR KTA1268GR Q665, Q666 HVTKTC3200GRT TRANSISTOR KTC3200GR Q668~Q670 HVTKTC3200GRT TRANSISTOR KTC3200GR Q683, Q684 HVTKTC3114A TRANSISTOR , BIAS...
  • Page 55 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R683, R684 CRD20TJ561T RESISTOR , CARBON 560 OHM 1/5W J R686~R688 CRD20TJ561T RESISTOR , CARBON 560 OHM 1/5W J R689, R690 CRD20TJ152T RESISTOR , CARBON 1.5K OHM 1/5W J R692~R694 CRD20TJ152T RESISTOR , CARBON 1.5K OHM 1/5W J R701, R702 CRD20TJ121T...
  • Page 56 LOAD NO. PART NO. DESCRIPTION SPECIFICATION D925~D928 HVD1SS133MT DIODE 1SS133T-77 JK91 CJJ5Q007Z TERMINAL,SP(RRRR/BBBB) JK92 CJJ5N005Z TERMINAL,SP(R/B) L926~L928 CLEY0R5KAK COIL , SPEAKER 0.5uH L930, L931 CLEY0R5KAK COIL , SPEAKER 0.5uH Q901 KVTKSC2785YT TRANSISTOR KSC2785Y Q902 HVTKRA102MT TRANSISTOR KRA102M Q903 HVTKTA1271YT TRANSISTOR KTA1271Y Q904~Q907 KVTKSC2785YT...
  • Page 57 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R990 BRDERC12UGK335T RESISTOR , CARBON(AH VER.) 3.3M OHM 1/2W RY91 HSL1A008ZE RELAY SDT-S-112DMR T901 CLT5L053ZE TRANSFORMER, SUB (C VER.) CLT5L053ZU TRANSFORMER, SUB (AH VER.) CUP11556-3 CONNECTOR PCB BN14 KJP12GB99ZM CONNECTOR CN41 KJP12GA98ZM WAFER R967 CRD20TJ222T RESISTOR , CARBON 2.2K OHM 1/5W J...
  • Page 58 LOAD NO. PART NO. DESCRIPTION SPECIFICATION IC10, IC11 HVIHY57V161610D I.C , SDRAM(16M) HY57V161610DTC8 IC13 HVIBR24C16F I.C , EEPROM(16K) 2K*8 SOP8 IC14 HVICS4955 I.C , VIDEO ENCODER CS4955 L101 HLZ9Z005Z FERRITE CORE 6*10(A) + COIL L102 HLZ9Z005Z FERRITE CORE 6*10(A) + COIL L104, L105 HRJ10DJ0R0T RESISTOR , CHIP...
  • Page 59 LOAD NO. PART NO. DESCRIPTION SPECIFICATION CWC1B4A23A300B CABLE, CARD CWE4202050AS WIRE ASS`Y CWE4202100AR WIRE ASS`Y CWZDR700BN47 WIRE ASS`Y BN12 CWZHTS5000BN12 CABLE,ATAPI(FLATE,40P) CLZ9W003Z FERRITE , RING 29X7.7X19 CWC1B4A15A150B CABLE , CARD CWC1B4A17A120B CABLE , CARD CWC1B4A23A100B CABLE , CARD CWC1C4A13B200B CABLE , CARD CWC1C4A15B080B CABLE , CARD PWR1...
  • Page 60 © NAD 2002 NAD ELECTRONICS LTD TORONTO...

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