NAD T 752 Service Manual
  1. Manuals
  2. Brands
  3. NAD Manuals
  4. Receiver
  5. T752
  6. Service manual

NAD T 752 Service Manual

Av surround sound receiver
Hide thumbs Also See for T 752:
Table of Contents

Advertisement

Quick Links

See also: Owner's Manual
DRAFT DATE: 08 OCT, 2002
NAD
T 752
AV SURROUND
SOUND RECEIVER

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the T 752 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for NAD T 752

Summary of Contents for NAD T 752

  • Page 1 DRAFT DATE: 08 OCT, 2002 T 752 AV SURROUND SOUND RECEIVER...
  • Page 2 SAFETY INFORMATION...

  • Page 3: Table Of Contents

    SERVICE SAFETY PRECAUTIONS 1. Replacing the fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. Reference Designator Part Number Description F751*AH 33-0160001-00-48 Fuse 8A 250V Time Lag 5x20 MM UL/CSA F751*C 33-0131002-00-48 Fuse 5A 250V Time Lag 5x20 MM SEMKO/VDE F752*AH 33-0111006 -00-48...

  • Page 4: Specifications

    SPECIFICATIONS POWER AMPLIFIER SECTION Rated distortion (Rated power level into 8 ohms, THD 20 Hz-20 kHz FL/C/FR) ≤ 0.1 % (Rated power level into 8 ohms, THD 20 Hz-20 kHz SL/SR) ≤ 0.1 % Input Sensitivity (ref. 8 ohms, 1 kHz) 200 ±...

  • Page 5: Am Tuner Section

    AM TUNER SECTION Input level is expressed as the reading in open circuit of 75-ohm source impedance signal generator Usable sensitivity (999/1000 kHz) ≤ ≤ ≤ ≤ ≤ 30 dBuv S/N Ratio (5 mV in) ≥ ≥ ≥ ≥ ≥ 30 dB (5 mV in) ≤...

  • Page 6: Rear Panel / Front Panel View

    REAR PANEL / FRONT PANEL VIEW REAR PANEL FM & AM ANTENNA SWITCHED POWER OUTLETS MAIN IN / AUDIO PRE-OUTS / 10. AC POWER CORD SUBWOOFER OUT DIGITAL AUDIO INPUTS & DIGITAL AUDIO MONITOR OUT OUTPUT CD INPUT 12. FRONT, CENTER & SURROUND SPEAKERS DISC INPUT 13.

  • Page 7: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS Remove machine screws M4.0 x 8.0 (1 to 6) from the side panels. Remove tapping screw 3.0 x 8.0 (7 to 10) from the back panel. Refer to Figure No. 1. Figure No. 1 Pull both sides of the TOP COVER slightly outwards 11 and tilt approx. 35 ° and then remove in the direction as indicated by the arrow 12.

  • Page 8: Wiring Diagram

    WIRING DIAGRAM J717B J718B J719B PRE-OUT BOARD MULTI-CHANNEL BOARD J614B J611A 82-1026135-06-98 CABLE ASSY 10 WAYS #26 2.5P UL2877L=50mm TUNER DSP BOARD FRONT/CENTER AMPLIFIER BOARD J203B J612B J501A J503A J502A 36-2828201-71-92 FFC CABLE 28 PINS 82-1224135-02-98 CABLE ASSY 12 WAYS #26 P1.25 L=200mm 2.5P UL2877 L=120mm J702A...
  • Page 9 Part No. Description Location Start Normal Front and Center Amp Board 82-1224135-02-98 CABLE ASSY 12 WAYS AWG=26 2.5P UL2877 L=120mm J503A FR & C Amp board Surr Amp Board Normal Surround Amp Board 82-0318235-03-98 CABLE ASSY 3 WAYS AWG=18 3.96P UL1007 L=180mm J504B Surr Amp Board FR &...
  • Page 10 Normal Secondary Board 82-1426135-00-98 CABLE ASSY 14 WAYS AWG=26 2.5P UL2877 L=420mm J782A Secondary Board Main Board Normal Trigger Board 82-0326135-03-98 CABLE ASSY 3 WAYS AWG=26 2.5P UL2854 L=150mm J304B Trigger Board Audio Board 82-0826135-00-98 CABLE ASSY 8 WAYS AWG=26 2.5P UL2877 L=480mm J350A Trigger Board Keyboard...

  • Page 11: Block Diagram

    BLOCK DIAGRAM...
  • Page 12 ADJUSTMENT POINT DIAGRAM FRONT/CENTER AMPLIFIER BOARD SURROUND AMPLIFIER BOARD AMPLIFIER ADJUSTMENT Idle Current 1. Rotate R522 fully clockwise. 2. Connect DC millivoltmeter to P501 (i.e. Across half of R523, 0.22 Ohm resistor). 3. Turn on the unit. 4. Adjust R522 for 1mV reading on voltmeter. 5.

  • Page 13: Pcb Layout

    PCB LAYOUT AUDIO BOARD - COMPONENT SIDE AUDIO BOARD - COPPER SIDE...
  • Page 14 COMPONENT VIDEO BOARD - COMPONENT SIDE COMPONENT VIDEO BOARD - COPPER SIDE DIGITAL BOARD - COMPONENT SIDE SIDE DIGITAL BOARD - COPPER SIDE...
  • Page 15 DSP BOARD - COMPONENT SIDE DSP BOARD - COPPER SIDE...
  • Page 16 FRONT/CENTER AMPLIFIER BOARD...
  • Page 17 SURROUND AMPLIFIER BOARD...
  • Page 18 KEY BOARD - COMPONENT SIDE KEY BOARD - COPPER SIDE...
  • Page 19 MAIN BOARD...
  • Page 20 MULTI-CHANNEL BOARD...
  • Page 21 SECONDARY/POWER SWITCH/LED BOARD POWER SUPPLY BOARD (STANDBY)
  • Page 22 PRE-OUT BOARD...
  • Page 23 VIDEO 6 BOARD TRIGGER BOARD SPEAKER TERMINAL BOARD...
  • Page 24 S-VIDEO BOARD COMPOSITE VIDEO BOARD - COMPONENT SIDE - COPPER SIDE...
  • Page 25 SCHEMATIC DIAGRAM AUDIO SWITCH...

  • Page 26: Component Video

    COMPONENT VIDEO RESISTORS : UNLESS OTHERWISE SPECIFIED ARE CARBON FILM. NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%. COMPONENT VIDEO 1 U4302 U4301 74HC4052 BA7760FS COMPONENT COMPONENT VIDEO 2 VIDEO OUT U4303 74HC4052...
  • Page 28 POWER SUPPLY (SECONDARY)
  • Page 29 POWER SUPPLY (STAND BY)
  • Page 30 TRIGGER...
  • Page 31 VIDEO 6...
  • Page 32 S-VIDEO...
  • Page 33 FRONT / CENTER AMPLIFIER...

  • Page 34: Surround Amplifier Wiring Diagram

    SURROUND AMPLIFIER...
  • Page 35 DSP, DIGITAL IN/OUT U1022 CS4340 U1001 CS49326-CL U1004 U1002 74HC157 74HC245A U1005 CS8415A DTS & MPEG DECODER U1021 U1003 IC-CS4228 74LVC245A CS4228 U1017 IC-74HC251 DTA114ESA 2SC1815 RN1241 E C B E C B E C B DIGITAL IN/OUT U1008 U1009 74LVC574 74LVC574 U1014...
  • Page 36 KEYBOARD VD201 VACUUM FLORECENT DISPLAY 16-BT-93GNK U203 PT6306 EEPROM 2K BYTE 64-BITS HIGH VOLTAGE DISPLAY DRIVER IC U201 8-BIT MICROCONTROLLER PLCC M6759 U205 HCF4094B U208 74HC4051 U206 HCF4094B U209 74HC245 U202 8-BIT MICROCONTROLLER PLCC M6759 EXT 7 TAPE MON DISPLAY AM/FM SURR FM MUTE/...
  • Page 37 MULTI-CH / PRE-OUT FRONT L FRONT R SURR L HI VOLTAGE ANALOG FUNCTION SW. SURR R B.SURR L B.SURR R CENTER MULTI-CHANNEL BOARD PRE-OUT BOARD DTC144ESA DTC114ESA MUTING SS8050 DTA114ESA SS8550 DTA144ESA 2SC2878 RN1241 RESISTORS : UNLESS OTHERWISE SPECIFIED ARE CARBON FILM. NOTE: 1.
  • Page 38 MAIN BOARD IC BLOCK DIAGRAM 74HC157 DSP BOARD: U1004 SELECT STROBE 74HC251 DSP BOARD: U1071 STROBE...
  • Page 39 74LVC245 74HCU04 DSP BOARD: U1002, U1003, U1014 DSP BOARD: U1006 & U1016 74VHC245 KEYBOARD: U209 W27C020 74LVC574 DSP BOARD: U1007 DSP BOARD: U1008, U1009 OUTPUT (11) CONTROL BUFFER (19) (18) (17) CORE DECODER ARRAY (16) (15) (14) (13) (12) CS4228 DSP BOARD: U1021 SCL/CCLK SDA/CDIN...
  • Page 40 CS4340 DSP BOARD: U1022 SCLK/DEM1 DEM0 MUTEC External De-emphasis Mute Control Interpolation AOUTL Analog Filter Serial Filter Input LRCK Interface Interpolation AOUTR Analog Filter Filter SDATA DIF0 DIF1 MCLK CS49326 DSP BOARD: U1001 SCDIO, DATA 7:0, SCDOUT, R/W, EMAD 7:0, PSEL, ABOOT, EXTMEM...
  • Page 41 NJM5532 DSP BOARD: U1010~U1013, U1023 & U1025 MULTI-CHANNEL: U605~U608 PRE-OUT BOARD: U609~U612 NJM4558D SURROUND AMP BOARD: U801 TC9273 AUDIO BOARD: U301 (R-ch) 10bit (L-ch) Latch 10bit Circuit Latch (Same Circuit as L-ch Circuit) LEVEL SHIFT + SHIFT REGISTER CIRCUIT DATA LC4966 AUDIO BOARD: U302 &...
  • Page 42 M24C16 KEYBOARD: U210 M24Cxx 16Kb /8Kb /4Kb /2Kb /1Kb / NC / NC / E0 V CC / E0 / NC / E1 / E1 / E1 / E2 / E2 / E2 / E2 V SS PT6306 KEYBOARD: U203 LATB HVO1 RDIO...
  • Page 43 HCF4094B KEYBOARD: U204~U207 SERIAL SERIAL CLOCK SERIAL STROBE LATCH LATCH STAGES 3 - 7 LATCH 1 OUTPUT ENABLE V DD 3-STATE STATE STATE V SS V DD V SS 74HC4051 KEYBOARD: U208 74HC4051 CHANNELS IN/OUT COM OUT/IN CHANNELS IN/OUT CHANNELS IN/OUT...
  • Page 44 M6759 KEYBOARD: U201 & U202 P0.7:0 P2.7:0 P1.7:0 P3.7:0 Port 0 Port 2 Port 1 Port 3 Drivers Drivers Drivers Drivers Serial Port Timer Port Latch Port Latch Port Latch Interrupt Logic Data Bus Data Bus B Register Program Address Register ALU REG1 ALU REG2...
  • Page 45 74HC4052 COMPONENT VIDEO BOARD: U4302 & U4303 74HC4052 Y CHANNELS IN/OUT X CHANNELS IN/OUT COM "Y" OUT/IN COM "X" OUT/IN Y CHANNELS IN/OUT X CHANNELS IN/OUT BA7625 COMPOSITE VIDEO BOARD: U4202 S-VIDEO BOARD: U4102 & U4103...
  • Page 46 LC74763 S-VIDEO BOARD: U4101 Decoder...
  • Page 47 TC9164N MULTI-CHANNEL BOARD: U601 L-S1 R-S1 L-S2 R-S2 L-COM1 R-COM1 L-S3 R-S3 L-S4 R-S4 L-COM2 R-COM2 L-S5 R-S5 L-S6 R-S6 L-COM3 R-COM3 L-S7 R-S7 L-COM4 R-COM4 DATA SHIFT REGISTER M62446FP PRE-OUT BOARD: U602 & U603 OUT4 DVDD OUT- OUT3 PORT OUT2 DATA volume...

  • Page 48: Exploded View

    EXPLODED VIEW...

  • Page 49: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Item Part No. Description Qty. 10-0752001-00-10 WINDOW LENS 10-0752002-71-00 VOLUME KNOB ASSEMBLY 10-0752005-71-00 VOLUME BEZEL 10-0752007-01-00 VIDEO COVER 10-0752011-00-00 LED LENS 10-0752012-01-00 RACKER BUTTON 10-0752015-01-00 LED BEZEL 10-0752017-01-00 PLASTIC FOOT 10-0752022-01-00 POWER BUTTON 10-0752025-01-00 RACKER BEZEL 10-0752032-01-00 INPUT BUTTON 10-0752035-71-00...
  • Page 50 Item Part No. Description Qty. 14-0401002-04-00 SCREW M4 X 10 BLK-PLT 15-0400320-07-20 NUT M4 X 3.2 15-0900220-11-30 NUT M9 X 2.2 16-0320560-09-20 SPRING WASHER 16-0350080-04-35 STEEL WASHER 16-0400074-10-31 SPRING WASHER 16-0400100-08-25 STEEL WASHER 17-0500960-00-01 PCB SUPPOT H=9.6MM 17-1402600-30-22 RUBBER FOOT 25-0220054-30-18 POWER TRANSFORMER EI-114 115/230V 61*C...

  • Page 51: Electrical Parts List

    ELECTRICAL PARTS LIST Reference No. Part No. Description FRONT AND CENTER AMPLIFIER BOARD 80-0907520-40-00 FRONT AND CENTER AMP ASSEMBLY PCB ASSEMBLY SURROUND AMPLIFIER BOARD 80-0907520-18-00 SURROUND AMP ASSEMBLY PCB ASSEMBLY DSP BOARD 80-0907520-65-00 DSP ASSEMBLY PCB ASSEMBLY AUDIO BOARD TRANSISTORS Q301,Q303,Q307,Q309 21-0000120-70-14 XTR NPN HFE 68 30MHz SPT DTC144ES...
  • Page 52 Reference No. Part No. Description RCS JACKS M431-M432,M434 34-4032020-00-60 RCA 3 G-BL-R GOLD RS-354G-18 SWITCH S4301 35-4102209-00-67 SW SLIDE 2P2T JSK022N09-G09 DIGITAL BOARD FIBRE OPTICAL J1008 26-6691386-00-16 FIBRE OPTIC TRANSMITTER GP1FA550TZ J1005-J1006 26-6701380-01-16 FIBRE OPTIC RECEIVING UNIT GP1FA550RZ CAPACITORS C1066, C1067 22-3226052-00-43 CAP ELEC SS 2.2uF 50V 20% U1024, U1026 27-0804990-18-00 I.C.
  • Page 53 Reference No. Part No. Description U208 27-0140510-18-00 I.C. MUX/DEMUX M74HC4051MIR U209 27-0324591-18-00 IC OCTAL BUS TRANSCEIVER 74VHC245M U210 27-2300225-00-00 I.C. EEPROM 2K BYTE 250nS M24C16-BN6 CRYSTAL X201-X202 28-5221200-06-19 CRYSTAL 22.1184MHZ 30ppm HC-49S IC SOCKET U201A 34-6244000-00-79 IC SOCKET PLCC 44 FT TACT SWITCHES S201-S217 35-1001117-00-67...
  • Page 54 Reference No. Part No. Description CAPACITORS C701,C705-C706,C716 22-3102032-00-28 CAP ELEC GR 1000uF 25V 20% C702,C719,C723 22-3101022-00-43 CAP ELEC SS 100uF 16V 20% C704 22-3332032-00-28 CAP ELEC GR 3300uF 25V 20% C707,C721,C724 22-3222032-00-34 CAP ELEC GS 2200uF 25V 20% C710 22-3470052-00-43 CAP ELEC SS 47uF 50V 20% C711-C713 22-3102052-00-28 CAP ELEC GR 1000uF 50V 20% REGULATORS...
  • Page 55 Reference No. Part No. Description PRE-OUT BOARD DIODES D602,D604 20-3275902-00-01 DIODE ZENER BZX55 7.5V 1/2W 5% D605-D609, D611-D615 20-0000000-00-13 DIODE SW 4NS DO35 IN4148 TRANSISTORS Q605 21-0000140-00-11 XTR NPN HFE 120 100MHz SS8050C Q607 21-0100131-00-11 XTR PNP HFE 170 1.5A SS8550C Q608-Q615 21-0000350-70-00 XTR NPN HFE200-700 30MHz SPT RN1241A...
  • Page 56 Reference No. Part No. Description RESISTORS R751 23-5228330-00-00 RES FUSIBLE 0.22 OHM 10% 1/2W R754*AH 23-0395230-00-00 RES CF 3.9M OHM 5% 1/2W RELAY M751*C 32-3112100-02-97 RELAY 12VDC/10A SPST PCB OMI-SS-112LM M751*AH 32-1012100-01-97 RELAY 12VDC/10A 1P1T DIODE D751 20-0000000-00-13 DIODE SW 4NS D035 IN4148 D752-D755 20-1001401-20-44 DIODE RECT 1A/400V D041 1N4004 TRANSISTOR...
  • Page 57 Reference No. Part No. Description CAPACITORS C790-C791 22-3123072-00-41 CAP ELEC LP 12000uF 80V 20% C781-C789 22-4210402-00-31 CAP MPF 0.1uF 63V 5% RESISTORS R784-R785 23-2228232-00-00 RES MO 0.22 OHM 5% 1/2W R790,R793 23-4228280-08-20 RES CE 0.22 OHM 5% 5W R781-R783 23-5228330-00-00 RES FUSIBLE 0.22 OHM 10% 1/2W SPEAKER BOARD SPEAKER TERMINALS M5101...
  • Page 58 Reference No. Part No. Description U4101 27-5574763-21-02 I.C. OSD LC74763-9012 U4102,U4103 27-5076250-21-23 I.C. AV SWITCH BA7625 U4104 27-9496600-21-02 I.C. QUAD BILATERAL SWITCH LC4966 CRYSTALS X4101 28-5143200-06-19 CRYSTAL 14.318MHz 30ppm HC-49S X4102 28-5177200-06-19 CRYSTAL 17.73447MHz 30ppm HC-49S DIN JACKS M411-M418 34-4110300-00-60 DIN JACK 1 BLACK MD-113 TRIGGER BOARD DIODE D351...
  • Page 59 Reference No. Part No. Description CAPACITORS C4201-C4203, C4205, C4207, 22-3226052-00-43 CAP ELEC SS 2.2uF 50V 20% C4209-C4210 C4204, C4206, C4208, C4211 22-3471012-00-28 CAP ELEC GR 470uF 10V 20% U4202 27-5076250-21-23 I.C. AV SWITCH DIP BA7625 U4201 27-9496600-21-02 I.C. QUAD BILATERAL SWITCH LC4966 RCA JACKS M421-M422 34-4040020-00-60 RCA JACK 4 Y-Y/Y-Y GOLD RS-454-03...

  • Page 60: Packing Diagram

    36-2283110-07-96 *C POWER CORD 63-0752001-00-01 POLYFOAM ENDCAP L 64-0700001-00-01 POLYBAG UNIT 63-0752002-00-00 POLYFOAM ENDCAP R 37-0020200-00-79 BATTERY AAA 1.5V 83-0752000-00-04 REMOTE HANDSET NAD HTR-2 67-0752002-11-99 CARTON SHEET 490 X 225 MM 67-0752001-10-99 CARTON SHEET 560 X 225 MM 67-0752000-10-99 CARTON BOX...

  • Page 61: Version History

    VERSION HISTORY SERIAL NUMBER SOFTWARE VER. PCB ASSEMBLY VERSION R28T75200001-R28T75200050 A6 PCB ASSEMBLY KEYBOARD, DSP BOARD, TRIGGER BOARD, MAIN BOARD, VIDEO 6 BOARD, PRE-OUT BOARD, MULTI-CHANNEL BOARD, SECONDARY BOARD, LED BOARD, DIGITAL BOARD, POWER SWITCH BOARD, COMPONENT VIDEO BOARD. A7 PCB ASSEMBLY FRONT &...
  • Page 62 NOTES:...
  • Page 63 © NAD 2002 NAD ELECTRONICS LTD LONDON...

Table of Contents

Save PDF