NAD L76 Service Manual
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NAD L76 Service Manual

NAD L76 Service Manual

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L76
A/V RECEIVER

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Summary of Contents for NAD L76

  • Page 1 A/V RECEIVER...

  • Page 2: 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 LOCATION OF CUSTOMER CONTROLS ..................1-7 ~ 1-8 EXPLODED VIEW ..........................1-9 ~ 1-10...

  • Page 3: 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 4: 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 5: 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 : 50 kHz steps driven into 8 ohms from 20 Hz to 20kHz with no more than 0.09% total harmonic distortion AM Suppression Ratio: 45 dB Surround Output Power (0.5% THD, 1 kHz, 8 ohms) :...

  • Page 6: Location Of Customer Controls

    LOCATION OF CUSTOMER CONTROLS FRONT PANEL VFL Display POWER STANDBY/ON button BASS/TREBLE BALANCE Tone Controls Control PHONES MASTER VOLUME SOURCE SELECTOR Control Control REAR PANEL S-VIDEO Signal jacks AUDIO Signal jacks Dolby Digital / DTS / PCM DIGITAL IN jacks PRE OUT jack SPEAKER terminals VIDEO Signal jacks...

  • Page 7: Remote Control

    4. CLEAR button (L56) 5. REPEAT button (L56) TUNER CAB/SAT TAPE MACRO 6. INPUT SOURCE SELECTOR buttons(L76), NUMERIC buttons (L76/L56) 7. OSD ON/OFF buttons (L76), DVD SET UP button (L56) PROGRAM CLEAR REPEAT VIDEO 2 VIDEO 1 8. MUTE button (L76) 9.

  • Page 8: Exploded View

    EXPLODED VIEW DESCRIPION PARTS-NO Q,ty SCREW CTS3+8J AL PANEL KKM1A105XC37 SPECIAL SCREW CHD1A016 SIDE BAR KKM2A062C37 SCREW CTB3+6J RUBBER , TRANS KHG1A198 SCREW CTB3+6F VOLUME KNOB ASS'Y KGK1A063YA SCREW CTB3+10G VOLUME KNOB ASS'Y(B) KGK1A064XA SCREW CTWS3+10G VOLUME KNOB ASS'Y(A) KGK2A064WA SCREW CSN2+4 66 X10...
  • Page 9 1. BLOCK DIAGRAM 2-22 2-23...
  • Page 10 BLOCK DIAGRAM 2-24 2-25...
  • Page 11 2. WIRING DIAGRAM 2-26 2-27...
  • Page 12 3. SCHEMATIC DIAGRAMS MAIN SCHEMATIC DIAGRAMS 2-28 2-29...
  • Page 13 u-COM & GUIDE CIRCUIT DIAGRAM 2-30 2-31...
  • Page 14 INPUT SCHEMATIC DIAGRAM 2-32 2-33...
  • Page 15 AMP, SPEAKER, SUB TRANS & AC OUTLET CIRCUIT DIAGRAM 2-34 2-35...
  • Page 16 SURROUND CIRCUIT DIAGRAM 2-36 2-37...
  • Page 17 SURROUND CIRCUIT DIAGRAM 2-38 2-39...
  • Page 18 SECTION 2 ELECTRICAL CONTENTS CONTENTS IC BLOCK DIAGRAMS & PIN DESCRIPTION ..................2-11 1. IC81 (TMP87PS71AF u-COM)......................2-12 2. IC35 (CS493264-CL DSP) ......................... 2-14 3. IC34 (AK4586VQ DIR+CODEC)......................2-16 4. IC21~23 (NJM2296M VIDEO SW) ....................2-18 5. IC12~15, 37~42, 82 (OPA213UA, NJM2068MD OP AMP) .............. 2-18 6.
  • Page 19 IC PIN FUNCTION (u-COM : ANAM1328AT,O.T.P : TMP87PS71AF) : IC81 PIN No. SYMBOL DESCRIPTION Not Use (No connection) REMOTE IN Remote Control Sensor Data Input RDS CLK RDS IC (SA6579TV1) CLK/Data Port RDS DATA Function Mute Function Mute Control Output port (Active “H”) EVOL Data EVOL CLK Electronic Vol.

  • Page 20: Top View

    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 21 AUDIO DSP(CS493264-CL : IC35) 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 22 PIN ASSIGNMENT.(IC35: CS493264-CL) 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 23 PIN/FUNCTION (IC34: AK4586VQ) 2-16...
  • Page 24 PIN ASSIGNMENT (IC42: AK4586VQ) 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: AK4586VQ) Audio X’tal µP I/F Oscillator MCLK Clock MCKO Generator Clock Recovery LOUT1 DATT DAIF...
  • Page 25 NJM2296M (VIDEO SW / IC21, 22, 23) Vin1 Vin2 6.2dB Vout1 dirver Vin3 6.2dB Vout2 dirver Vin4 6.2dB Vout3 dirver Vin5 OPA2134UA / NJM 2068MD NJU3713G (EXPANDOR : IC 84) (OP AMP / IC12~15, 37~42, 82) PIN CONFIGURATION BLOCK DIAGRAM •...
  • Page 26 TC9164AF (FUNCTION /IC34) BLOCK DIAGRAM R-COM L-COM L-COM R-COM L-COM R-COM DATA SHIFT REGISTER TC9163AF (FUNCTION /IC11) BLOCK DIAGRAM R-COM L-COM L-COM R-COM L-COM R-COM DATA SHIFT REGISTER 2-19...
  • Page 27 TC9482F (ELECTRONIC VOLUME/IC16) TEST (SUB) L-OUTA R-OUTA (SUB) L-INA R-INA latch L-A-GNDA R-A-GNDA latch (LS) L-OUTB R-OUTB 3 to 7 (LS) L-INB R-INB decoder Same as L-ch latch Circuit 4 to 13 L-A-GNDB R-A-GNDB latch decoder (RS) L-OUTC R-OUTC (RS) L-INC 10 R-INC latch...
  • Page 28 TRANSISTOR, REGULATOR IC BLOCK DIAGRAM TO-92L TO-92 TO-220 TO-92L 1. Emitter 1. Emitter 1. Emitter 1. DC IN 2. Collector 2. Collector 2. Collector 2. DC OUT 3. Base 3. Base 3. Base 3. GND 12 3 12 3 1 2 3 KSA1175Y DTC144TS KTD1302T...

  • Page 29: 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. • The unit of resistance is OHM (Ω) K=1000 (Ω), M=1000 (KΩ) • The unit of capacitance is MICROFARAD (µF) P=10 µF Numbering System of Resistor...
  • Page 30 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C920 HCEA1AH471T CAP , ELECT 470UF 10V C921 , C923 CCKT1H223ZF CAP , CERAMIC 0.022UF 50V Z C957 , C958 HCQI1H102JZT CAP , MYLAR 1000PF 50V J C959 HCEA1HH1R0T CAP , ELECT 1.0UF 50V D791 HVD1SS133MT DIODE...
  • Page 31 LOAD NO. PART NO. DESCRIPTION SPECIFICATION CN41 KJP09GA98ZM WAFER MOLEX35336-0910 CN46 KJP07GA98ZM WAFER MOLEX35336-0710 CN51 , CN52 BJP06GA130ZK CONNECTOR (SOCKET) TAC-L06X-A3 CN61 , CN62 BJP06GA130ZK CONNECTOR (SOCKET) TAC-L06X-A3 CN71 , CN72 BJP06GA130ZK CONNECTOR (SOCKET) TAC-L06X-A3 CN75 BJP13GA98ZM CONNECTOR (SOCKET) TAC-L13X-A3 CN76 KJP03GA98ZM WAFER...
  • Page 32 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C807 , C808 HCEA1VKS100T CAP , ELECT 10UF 35V C809 , C810 KCFE1J472JBT CAP , FILM 4700PF 63V J C811 , C812 KCFE1J223JBT CAP , FILM 0.022UF 63V J C813 , C814 KCFE1J123JBT CAP , FILM 0.012UF 63V J C815 , C816 KCFE1J683JBT...
  • Page 33 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R819 , R820 CRD20TJ121T RES , CARBON 120 OHM 1/5W J R821 CRD25TJ102T RES , CARBON 1K OHM 1/4W J R822 CRD20TJ102T RES , CARBON 1K OHM 1/5W J R835 , R836 CRD20TJ271T RES , CARBON 270 OHM 1/5W J R837 CRD20TJ102T...
  • Page 34 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R111 ~ R124 CRD20TJ104T RES , CARBON 100K OHM 1/5W J R125 ~ R128 CRD20TJ471T RES , CARBON 470 OHM1/5W J R129 ~ R131 CRD20TJ102T RES , CARBON 1K OHM 1/5W J BN84 KJP12GB99ZM CONNECTOR JK11 , JK12 CJJ4P039W...
  • Page 35 LOAD NO. PART NO. DESCRIPTION SPECIFICATION PCB7 CUP11551-6 PCB , GUIDE C859 , C861 HCBS1H220JT CAP , CERAMIC 22PF 50V J C860 , C862 HCBS1H270JT CAP , CERAMIC 27PF 50V J C863 , C864 HCBS1H220JT CAP , CERAMIC 22PF 50V J C881 HCBS1H223ZFT CAP , CERAMIC...
  • Page 36 LOAD NO. PART NO. DESCRIPTION SPECIFICATION Q511 , Q512 HVTKTC3200GRT KTC3200GR Q527 , Q528 KVTKSC2785YT KSC2785Y Q751 , Q752 HVTKTA1271YT KTA1271Y Q753 KVTKSC2785YT KSC2785Y Q755 , Q756 KVTKSC2785YT KSC2785Y Q757 HVTKTA1271YT KTA1271Y Q758 HVTKRA107MT KRA107M Q759 KVTKSC2785YT KSC2785Y R501 , R502 CRD20TJ102T RES , CARBON 1K OHM 1/5W J...
  • Page 37 LOAD NO. PART NO. DESCRIPTION SPECIFICATION Q517 , Q518 HVT2SC3423O 2SC3423O Q519 , Q520 HVTKTD2061Y KTD2061Y Q521 , Q522 HVTKTB1369Y KTB1369Y R561 , R562 KRF5EKR22H RES , CEMENT 0.22 OHM 5W K R571 , R572 KRF5EKR22H RES , CEMENT 0.22 OHM 5W K PCB2 CUP11397-2 PCB , SURROUND AMP C601 , C602...
  • Page 38 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R667 , R668 CRD20TJ102T RES , CARBON 1K OHM 1/5W J R669 , R670 CRD20TJ103T RES , CARBON 10K OHM 1/5W J R683 , R684 CRD20TJ331T RES , CARBON 330 OHM 1/5W J R701 CRD20TJ102T RES , CARBON 1K OHM 1/5W J...
  • Page 39 LOAD NO. PART NO. DESCRIPTION SPECIFICATION Q713 HVT2SA1695 T.R , POWER 2SA1695 ASS'Y 3 CMY1A166ZA HEAT SINK ASS'Y(R) CMY1A166 SINK , HEAT(R) Q513 , Q514 HVTKTC3114A T.R , (BIAS) KTC3114A Q523 , Q524 HVT2SC4468 T.R , POWER 2SC4468 Q525 , Q526 HVT2SA1695 T.R , POWER 2SA1695...
  • Page 40 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C991 BCKWKH472ME CAP , CERAMIC DE1310-610E472M C992 BCQE2E104KDE CAP , LINE ACROSS 0.1UF 250V KD RY91 HSL1A008ZE RELAY SDT-S-112DMR PCB3 CUP11431-2 PCB , SUB TRANS BN93 CWB4DA32150UZ WIRE ASS'Y BN94 CWB1D009230BM WIRE ASS'Y BN95 CWB1C003150BM WIRE ASS'Y T902...
  • Page 41 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C414 HCBS1H473ZFT CAP , CERAMIC 0.047UF 50V Z C415 HCBS1H104ZFT CAP , CERAMIC 0.1UF 50V Z C416 HCEA1AH471T CAP , ELECT 470UF 10V C417 HCEA1CH101T CAP , ELECT 100UF 16V C418 HCEA1AH471T CAP , ELECT 470UF 10V C419 HCBS1H473ZFT...
  • Page 42 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R423 ~ R428 CRD20TJ330T RES , CARBON 33 OHM 1/5W J R429 CRD20TJ103T RES , CARBON 10K OHM 1/5W J R430 CRD20TJ101T RES , CARBON 100 OHM 1/5W J R431 CRD20TJ330T RES , CARBON 33 OHM 1/5W J R433 CRD20TJ103T...
  • Page 43 LOAD NO. PART NO. DESCRIPTION SPECIFICATION C331 HCQI1H102JZT CAP , MYLAR 1000PF 50V J C332 CCCT1H680JC CAP , CERAMIC 68PF 50V J C333 HCEA1HKS4R7T CAP , ELECT 4.7UF 50V C334 HCEA1CKS100T CAP , ELECT 10UF 16V C335 , C336 CCKT1H223ZF CAP , CERAMIC 0.022UF 50V Z C337 , C338...
  • Page 44 LOAD NO. PART NO. DESCRIPTION SPECIFICATION R319 , R320 CRD20TJ104T RES , CARBON 100K OHM 1/5W J R321 ~ R326 CRD20TJ472T RES , CARBON 4.7K OHM 1/5W J R327 , R328 CRD20TJ101T RES , CARBON 100 OHM 1/5W J R329 ~ R332 CRD20TJ104T RES , CARBON 100K OHM 1/5W J...
  • Page 45 © NAD 2003 NAD ELECTRONICS INTERNATIONAL TORONTO...

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