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NAD L75, Service Manual

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SER

VICE MANU

AL

L75

 A/V 

RECEIVER

NAD ELECTRONICS INTERNATIONAL

TORONTO

© NAD   2001

Summary of Contents for L75

Page 1: ...SERVICE MANUAL L75 A V RECEIVER NAD ELECTRONICS INTERNATIONAL TORONTO NAD 2001 ...

Page 2: ...SERVICE MANUAL L75 A V RECEIVER L75A V RECEIVER ...

Page 3: ...UCT 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 4: ... CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND WATER PIPE CONDUIT ETC AND THE EXPOSED METALLIC PARTS ONE AT A TIME MEASURE THE AC VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND 15 MFD CAPACITOR REVERSE THE AC PLUG AND REPEAT AC VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R M S THIS CORRESPONDS TO 0 5 MILLIAMP AC ANY VALUE EXCEEDING THIS LIMIT...

Page 5: ...s including Metal panels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical Es devices are integrated circuits and some field effect transistors and semiconductor chip components The following techni...

Page 6: ...21 dBm Video Section Input Sensitivity Impedance 1 0 Vp p 75 ohms Output Level Impedance 1 0 Vp p 75 ohms LINE means TAPE AUX VIDEO 1 VIDEO 2 DVD Improvements may result in specifications and features changing without notice lllustrations may differ slightly from production models FM Tuner Section Without notes 100 1 MHz 65 dBf Tuning Range 87 5 MHz 108 0 MHz C 50 kHz steps AH 100 kHz steps AM Sup...

Page 7: ... BASS TREBLE Tone Controls MASTER VOLUME Control BALANCE Control SOURCE SELECTOR Control AUDIO Signal jacks VIDEO Signal jacks PRE OUT jack DIGITAL OUT jacks SPEAKER terminals For AH version only Dolby Digital DTS PCM DIGITAL IN jacks S VIDEO Signal jacks FRONT PANEL REAR PANEL ...

Page 8: ...PROGRAM button L55 8 OSD ON OFF button L75 DVD SET UP button L55 9 DIGITAL INPUT RDS button L75 DVD DISPLAY button L55 10 TITLE button L55 11 MENU buttons L55 12 ARROW buttons L75 55 VOLUME UP DOWN PRESET UP DOWN buttons L75 13 ENTER button L75 55 14 RETURN button L55 15 MUTE button L75 16 OPEN CLOSE buttons L55 17 STOP button L55 18 PLAY button L55 19 FOR REV SCAN SKIP button L55 20 SLO W buttons...

Page 9: ...9 KDD1A013 WINDOW SENSOR KNOB DISPLAY FAN PANEL SUB KNOB POWER PCB AUDIO INPUT KMH1A117 COVER FAN 1 2 1 3 1 1 2 1 1 1 1 KMY1A115 KGU1A244A8 KGK1A064ZA KGK2A064YA KGK1A063ZA KKM1A062C26 SINK HEAT F WINDOW FIP INDICATOR POWER VOLUME KNOB ASS Y A VOLUME KNOB ASS Y B VOLUME KNOB ASS Y AL PANEL SIDE BAR 1 1 1 1 1 1 PANEL REAR CHASSIS BOTTOM KUA1A190 6 KHE1A023 PCB MOUNT 1 1 46 BHG1A171 48 47 Q ty PARTS...

Page 10: ...256A15J 256K SRAM 2 18 9 IC36 TC9164AF FUNCTION 2 19 10 IC36 TC9163AF FUNCTION 2 19 11 IC16 TC9482F ELECTRONIC VOLUME 2 20 12 IC31 TC74HCUO4AFN INVERTER 2 20 13 IC85 MC74HC14D INVERTER 2 21 14 IC25 ANAM2024V OSD 2 21 15 IC83 SAA6579TV1 ROS FILTER 2 22 16 TRANSISTOR REGULATOR IC BLOCK DIAGRAM 2 22 DIAGRAMS 2 23 1 BLOCK DIAGRAM 2 23 2 WIRING DIAGRAM 2 27 3 SCHEMATIC DIAGRAM 2 29 MAIN 2 29 FRONT 2 31...

Page 11: ... Connection 32 788KHz Crystal Connection Port Reset Input Port L 8MHz Cystal Connection Port Device GND Port Back Up Mode Control Port L Function Selector ENCODER Control port Power ON Control port Active L YSS912 Data Input Ports ODS IC ANAM2024V Chip Selector Port Surr OSD CLK Output port Chip Selector port for YSS912 Surr OSD Data Output Port Chip Selector Port for AK4112 Sub DSP Chip Selector ...

Page 12: ... XOUT VSS INTS STOP P20 INT3 TC3 P30 TC4 P31 SCK P32 SI P33 SO P34 HSCK P35 P36 HSO P37 P66 G9 P65 G10 P64 G11 P63 G12 P62 G13 P61 G14 P60 G15 VDD P07 P06 P05 P04 P03 P02 P01 P00 BLOCK DIAGRAM VDD P9 VFT drive circuit automatic display Key scan control Program counter Register banks Stack Pointer P S W Interrupt Controller System Controller Standby Controller Timing Generator High frequ Low frequ ...

Page 13: ... DTS data not use Detection of AC 3 data not use PCM output from Sub DSP not use Output terminal for PLL to be connected to ground through the external analog filter circuit Ground for PLL circuit 3 3V power supply for core logic PCM output from Main DSP C LFE not use PCM output from Main DSP LS RS not use PCM output from Main DSP L R not use External SRAM interface address 14 10 Output port for g...

Page 14: ...igital output terminal A Analog terminal 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 80 79 78 77 76 75 74 73 72 71 70 68 67 66 65 64 63 62 61 60 69 58 57 56 55 54 53 52 51 59 1 VDD1 V SS IPORT0 IPORT1 IPORT2 IPORT3 IPORT4 IPORT5 IPORT6 IPORT7 VDD2 VSS RAMOEN RAMWEN RAMA0 RAMA1 SDIA1 SDIA0 SDBCK0 SDWCK0 VDD2 VDD1 OPORT0 OP...

Page 15: ...BSEL SDIB Interface SDOA Interface SDIA Interface SDIA Interface ERAMUSE 24 16 Sub DSP SDIASEL 24 16 Main DSP AC 3 Pro Logic DTS decoder Input Buffer Microprocessor Interface Control Registers IPORT 0 7 CS SO SI SCK OPORT 0 7 CSB SCK SI Control Signals Control Signals Data RAM Delay RAM PLL Operating clock 30MHz STREAM 0 7 External RAM interface YSS912C BLOCK DIAGRAM NJU3713G EXPANDOR IC 84 Shift ...

Page 16: ...8 25 26 23 24 39 5 4 10 1 9 6 7 8 DATT DAC LPF DATT DAC LPF DATT DAC LPF DATT DAC LPF DATT DAC LPF DATT LOUT2 ROUT2 LOUT3 ROUT3 AK4112AVF DIR IC32 RX1 FS96 DAUX LRCK BICK SDTO CSN TVDD CCLK CDTO CDTI AVSS AVDD R MCKO1 XTI XTO P S L ERF Serial Control Mode AUTO MCKO2 RX4 V TX RX2 RX3 DVSS PDN DVDD Input Selector System Control Clock Recovery DAIF Decoder AC 3 MPEG Detect Clock Generator Error Detec...

Page 17: ... 7 5 4 6 8 3 20K 20K 20K 20K 20K 75 dirver 75 dirver 1 2 3 4 8 PIN FUNCITON 1 A OUTPUT 2 A INPUT 3 A INPUT 4 V 5 B INPUT 6 B INPUT 7 B OUTPUT 8 V A B 7 6 5 OPA2134UA NJM 2068MD OP AMP IC12 15 37 42 82 IS61C256A15J 256K SRAM IC35 NJM2296M VIDEO SW IC21 22 23 A0 A14 1 10 21 23 26 11 12 15 19 I O0 I O7 CE1 VCC GND 20 28 13 22 27 OE WE DECODER I O DATA CIRCUIT CONTROL CIRCUIT 256 x 1024 MEMORY ARRAY C...

Page 18: ...M ST R S R S R S 5 R S 1 R COM R S 2 R COM R S R COM DATA CK 7 R S LEVEL SHIFTER 2 1 2 4 8 4 1 2 4 8 4 1 3 4 5 6 7 8 9 10 14 28 11 12 13 27 26 25 24 23 22 21 20 19 18 17 16 15 LATCH CIRCUIT SHIFT REGISTER LEVEL SHIFTER LATCH CIRCUIT L S R S Vss GND VDD L S 1 L COM 3 L S L S 5 L S 2 L COM 6 L S L S 7 L S L COM ST R S 1 R COM 3 R S R S 2 R COM 5 R S 6 R S R S R COM DATA CK 7 R S TC9164AF FUNCTION IC...

Page 19: ...7 8 L A GNDB L OUTC 9 L INC 10 12 CS1 GND 13 CK 14 L A GNDC 11 26 R OUTA R INA 25 24 R A GNDA R OUTB Same as L ch Circuit 23 R INB 22 21 R A GNDB R OUTC 20 R INC 19 17 CS2 STB 16 DATA 15 R A GNDC 18 1 28 27 TC9482F ELECTRONIC VOLUME IC16 PIN ASSIGNMENT 74HCU04AFN IC40 1 2 3 4 5 6 7 1A 1Y 2A 2Y 3A 3Y GND 6A 6Y 5A 5Y 4A 4Y Vcc 14 13 12 11 10 9 8 1 2 3 4 5 6 7 1A 1Y 2A 2Y 3A 3Y GND 6A 6Y 5A 5Y 4A 4Y ...

Page 20: ...isplay position detection Vertical dot counter Flashing reversal control register Flashing reversal control register Display control register RAM write address counter Composite synchro nization signal control Composite synchro nization signal separa tor control AFC circuit Sync separator Sync detector HSYN OUT VSYN OUT Xtal IN1 Xtal IN2 Xtal OUT1 Xtal OUT2 CV CR CV IN CV OUT Timing generator Sync...

Page 21: ...5C TO 220 123 1 Base 2 Collector 3 Emitter 2SD3856 2SA1492 2SC4468 2SA1695 KSA916Y KSC2316Y 1 Emitter 2 Collector 3 Base TO 3P TO 92L 123 1 2 3 SAA6579TV1 RDS FILTER IC83 ANTI ALIASING FILTER 57 kHz BANDPASS RECONSTRUCTION FILTER OSCILLATOR AND DIVIDER QUALITY BIT GENERATOR DIFFERENTIAN DECODER BIPHASE COSTAS LOOP CLOCKED COMPARATOR REFERENCE VOLTAGE CLOCK AND SYNC TEST LOGIC AND OUTPUT SELECTOR S...

Page 22: ...2 23 2 24 1 BLOCK DIAGRAM ...

Page 23: ...2 25 2 26 BLOCK DIAGRAM ...

Page 24: ...2 27 2 28 2 WIRING DIAGRAM ...

Page 25: ...2 29 2 30 3 SCHEMATIC DIAGRAMS MAIN SCHEMATIC DIAGRAMS ...

Page 26: ...2 31 2 32 u COM GUIDE CIRCUIT DIAGRAM ...

Page 27: ...2 33 2 34 INPUT SCHEMATIC DIAGRAM ...

Page 28: ...AMP SPEAKER SUB TRANS AC OUTLET CIRCUIT DIAGRAM 2 35 2 36 ...

Page 29: ...2 37 2 38 SURROUND CIRCUIT DIAGRAM ...

Page 30: ...2 39 2 40 SURROUND CIRCUIT DIAGRAM ...

Page 31: ...2 41 2 42 4 PRINTED CIRCUIT DIAGRAMS MAIN PCB ...

Page 32: ...2 43 2 44 FRONT PCB ...

Page 33: ...2 45 2 46 AMP SPEAKER PCB ...

Page 34: ...2 47 2 48 SURROUND PCB ...

Page 35: ...ARAD µF P 10 6 µF RESISTORS AND CAPACITORS MAIN B D KUP11395 1 2 3 PCB1 KUP11395 1 PCB MAIN L75 C271 KCEA1HH1R0T CAP ELECT 1 0UF 50V C272 C273 KCCT1H220JC CAP CERAMIC 22PF 50V J C274 KCKT1H101KB CAP CERAMIC 100PF 50 K C275 KCEA1HHR47T CAP ELECT 0 47UF 50V C276 C277 KCEA1EH470T CAP ELECT 47UF 25V C278 KCCT1H100DC CAP CERAMIC 10PF 50V D C279 KCCT1H560JC CAP CERAMIC 56PF 50V J C280 KCEA1HH1R0T CAP EL...

Page 36: ...RD20TJ102T RES CARBON 1K OHM 1 5W J R285 KRD20TJ104T RES CARBON 100K OHM 1 5W J R286 KRD20TJ102T RES CARBON 1K OHM 1 5W J R780 KRD20TJ103T RES CARBON 10K OHM 1 5W J R784 R788 KRD20TJ683T RES CARBON 68K OHM 1 5W J R789 KRD20TJ562T RES CARBON 5 6K OHM 1 5W J R790 KRD20TJ101T RES CARBON 100 OHM 1 5W J R791 KRD20TJ102T RES CARBON 1K OHM 1 5W J R793 R797 KRD20TJ562T RES CARBON 5 6K OHM 1 5W J R798 KRD2...

Page 37: ...U C908 C911 KCFEJ124JBT CAP FILM 0 12UF 63VJ C952 KCEA1HH100T CAP FILM 10UF 50V C953 KCEA1CH101T CAP FILM 100UF 16V C954 KCEA1HH470T CAP FILM 47UF 50V C955 KCEA1HH4R7T CAP FILM 4 7UF 50V C956 KCEA1HH100T CAP FILM 10UF 50V D902 D909 KVD1N4003ST DIODE 1N4003 D951 KVD1N4003ST DIODE 1N4003 D952 KVDMTZJ6 2BT DIODE ZENER 6 2V 1 2W D953 KVD1N4003ST DIODE 1N4003 D954 KVDMTZJ33BT DIODE ZENER 33V 1 2W D956 ...

Page 38: ...858 KCBS1H223ZFT CAP CERAMIC 0 022UF 50V Z C865 KCBS1H221KBT CAP CERAMIC 220PF 50V K C866 KCBS1H561KBT CAP CERAMIC 560PF 50V K C867 KCBS1H223ZFT CAP CERAMIC 0 022UF 50V Z C868 C869 KCBS1H181KBT CAP CERAMIC 180PF 50V K C870 KCEA1VKS100T CAP ELECT 10UF 35V D801 D806 BVDSEL2E10CFT L E D BLUE SEL2E10C 005 D807 D810 KVD1N4148MT DIODE 1N4148 D817 D818 KVD1N4148MT DIODE 1N4148 D819 BVDSEL2E10CFT L E D BL...

Page 39: ... R881 KRD20TJ2R2T RES CARBON 2 2K OHM 1 5W J R882 KRD20TJ102T RES CARBON 1K OHM 1 5W J R885 KRD20TJ103T RES CARBON 10K OHM 1 5W J R888 R889 KRD20TJ103T RES CARBON 10K OHM 1 5W J R890 KRD20TJ102T RES CARBON 1K OHM 1 5W J S801 S804 KST1A012ZT SW TACT SKHV10910G S809 S814 KST1A012ZT SW TACT SKHV10910G BN96 KWB1C006230BM WIRE ASS Y CN81 BJP26GA133ZK FLEXIBLE CONNECTOR PLUG TMC D26P A1 CN82 BJP10GA133Z...

Page 40: ...CT 10UF 16V C209 C212 KCBS1H223ZFT CAP CERAMIC 0 022UF 50V Z C213 C216 KCEA1AKS101T CAP ELECT 100UF 10V IC23 BVINJM2296M I C VIDEO SW NJM2296M R201 R205 KRD20TJ750T RES CARBON 75 OHM 1 5W J R206 R207 KRD20TJ332T RES CARBON 3 3K OHM 1 5W J R208 R209 KRD20TJ4R7T RES CARBON 4 7K OHM 1 5W J R210 R213 KRD20TJ102T RES CARBON 1K OHM 1 5W J BN21 KJP09GB99ZM CONNECTOR MOLEX 35237 0910 JK21 KJJ4S003Z TERMIN...

Page 41: ...11397 1 2 PCB1 KUP11397 1 PCB FRONT AMP C501 C502 KCEA1VH100T CAP ELECT 10UF 35V C503 C504 KCKT1H471KB CAP CERAMIC 470PF 50V K C505 C506 KCEA1CH221T CAP ELECT 220UF 16V C507 C508 KCCT1H150JC CAP CERAMIC 15PF 50V J C509 C510 KCKK1H181KB CAP CERAMIC 180PF 50V K C511 C512 KCQI1H223JZT CAP MYLAR 0 022UF 50V J C517 C518 KCQI1H223JZT CAP MYLAR 0 022UF 50V J C519 C520 KCEA1HH100T CAP ELECT 10UF 50V C529 ...

Page 42: ...ES CARBON 3 3K OHM 1 5W J R755 KRD20TJ100T RES CARBON 10K OHM 1 5W J R756 KRD20TJ101T RES CARBON 100 OHM 1 5W J R758 KRD20TJ123T RES CARBON 12K OHM 1 5W J R759 KRD20TJ105T RES CARBON 1M OHM 1 5W J R761 KRD20TJ123T RES CARBON 12K OHM 1 5W J R764 KRD20TJ103T RES CARBON 10K OHM 1 5W J R765 KRD20TJ102T RES CARBON 1K OHM 1 5W J R766 KRD20TJ472T RES CARBON 4 7K OHM 1 5W J R767 KRD20TJ103T RES CARBON 10K...

Page 43: ... 1 5W J R609 R610 KRD20TJ560T RES CARBON 56 OHM 1 5W J R611 R614 KRD20TJ150T RES CARBON 15 OHM 1 5W J R615 R618 KRD20TJ152T RES CARBON 1 5K OHM 1 5W J R619 R620 KRD20TJ473T RES CARBON 47K OHM 1 5W J R621 R622 KRD20TJ272T RES CARBON 2 7K OHM 1 5W J R623 R628 KRD20TJ561T RES CARBON 560 OHM 1 5W J R629 R632 KRD20TJ472T RES CARBON 4 7K OHM 1 5W J R633 R636 KRD20TJ561T RES CARBON 560 OHM 1 5W J R637 R6...

Page 44: ... T R 2SD1763AE Q621 Q622 KVT2SB1186AE T R 2SB1186AE Q708 BVT2SA13600 T R 2SA13600 Q709 BVT2SC34230 T R 2SC34230 Q710 KVT2SD1763AE T R 2SD1763AE Q711 KVT2SB1186AE T R 2SB1186AE R661 R662 KRF5EKR22H RES CEMENT 0 22 OHM 5W K R671 R672 KRF5EKR22H RES CEMENT 0 22 OHM 5W K R731 R736 KRF5EKR22H RES CEMENT 0 22 OHM 5W K HEAT SINKASS Y KMYL75 ASS Y 1 KDD1A013WA FAN ASS Y BDMMDN4RB4MRC MOTOR BDMMDN4RB4MRC K...

Page 45: ...P L501 L502 KLEYKOR5KA COIL SPEAKER 0 5UH K L601 L602 KLEYKOR5KA COIL SPEAKER O 5UH K L701 KLEYKOR5KA COIL SPEAKER 0 5UH K RY51 RY61 BSL4A010ZU RELAY OSA SS 212DM5 RY71 BSL1A008ZE RELAY SDT S 112DMR R575 R576 KRG1ANJ100H RES METAL OXIDE FILM 10 OHM 1W J R577 R578 KRG1ANJ331H RES METAL OXIDE FILM 330 OHM 1W J R675 R676 KRG1ANJ100H RES METAL OXIDE FILM 10 OHM 1W J R772 KRG1ANJ100H RES METAL OXIDE FI...

Page 46: ...180JC CAP CERAMIC 18PF 50V J C388 KCKT1H101KB CAP CERAMIC 100PF 50V K C389 C390 KCEA1CH101T CAP ELECT 100PF 16V C391 KCBS1H104ZFT CAP CERAMIC 0 1UF 50V Z C392 KCBS1H180JCT CAP CERAMIC 18PF 50V J C393 KCEA1CH101T CAP ELECT 100UF 16V C394 KCBS1H473ZFT CAP CERAMIC 0 047UF 50V Z C395 KCBS1H181KBT CAP CERAMIC 18PF 50V J C396 KCEA1CH101T CAP ELECT 100UF 16V C397 KCKT1H101KB CAP CERAMIC 100PF 50V K C398 ...

Page 47: ...XOX12288E320C CRYSTAL 12 288MHz HC 49 S PCB2 KUP11398 2 PCB SURROUND 2 C151 C154 KCEA1CKS100T CAP ELECT 10UH 16V C155 C156 KCBS1H223ZFT CAP CERAMIC 0 022UF 50V Z C157 C160 KCEA1CKS100T CAP ELECT 10UF 16V C161 C162 KCBS1H270JT CAP CERAMIC 27PF 50V J C163 C164 KCBS1H223ZFT CAP CERAMIC 0 022UF 50V Z C165 C168 KCEA1CKS100T CAP ELECT 10UF 16V C169 C170 KCBS1H270JT CAP CERAMIC 27PF 50V J C171 C172 KCBS1...

Page 48: ...4T RES CARBON 100K OHM 1 5W J R179 R180 KRD20TJ222T RES CARBON 2 2K OHM 1 5W J R181 R182 KRD20TJ101T RES CARBON 100 OHM 1 5W J R183 R188 KRD20TJ104T RES CARBON 100K OHM 1 5W J R189 R190 KRD20TJ101T RES CARBON 100 OHM 1 5W J R191 R193 KRD20TJ102T RES CARBON 1K OHM 1 5W J R194 KRD20TJ472T RES CARBON 4 7K OHM 1 5W J R301 R302 KRD20TJ103T RES CARBON 10K OHM 1 5W J R303 R304 KRD20TJ472T RES CARBON 4 7K...

Page 49: ...5W J R366 KRD20TJ104T RES CARBON 100K OHM 1 5W J R367 R368 KRD20TJ101T RES CARBON 100 OHM 1 5W J BN41 KJP09GB99ZM CONNECTOR MOLEX35237 0910 BN42 KJP13GB99ZM CONNECTOR MOLEX35237 1310 BN46 KJP07GB99ZM CONNECTOR HOUSING MOLEX35237 0710 CN47 KJP12GA98ZM WAFER MOLEX35237 1210 CN48 KJP09GA98ZM WAFER MOLEX35237 0910 INSTRUCTION MANUAL ASS Y BARTL75 REMOCON TRANSMITTER ASS Y BAT1 KABAAAM1 5VA BATTERY ASS...

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