NAD C 326BEE Service Manual
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NAD C 326BEE Service Manual

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DRAFT DATE: June 2011
NAD
C 326BEE
Stereo Integrated Amplifier

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Summary of Contents for NAD C 326BEE

  • Page 1 DRAFT DATE: June 2011 C 326BEE Stereo Integrated Amplifier...
  • Page 2 SAFETY INFORMATION 1.5A...

  • 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 Database Part Number Description F601*AH 20-001-0086-90 FUSE 3.15A 250V TIME LAG LBC 5x20mm TSD UL/CSA/VDE/SEMKO F601*C,CT 20-001-0076-90 FUSE 1.6A 250V TIME LAG...

  • Page 4: Specifications

    SPECIFICATIONS PRE AMPLIFIER SECTION LINE LEVEL INPUT, PRE-OUT > 0.004 % (ref. 20 Hz – 20 kHz) THD (2 Vin 2 Vout, CCIF IMD, DIM 100) Signal/Noise ratio IHF >100 dB (A-weighted, ref. 500 mV) >108 dB (A-weighted, ref. 2V, Volume max.) >92 dB (A-weighted, ref.

  • Page 5: Specifications

    Frequency response ± 0.2 dB (ref. 20 Hz - 20 kHz, Tone Defeat ON) 10 Hz – 65 kHz (ref. -3 dB) Channel separation - 1 kHz >80 dB 10 kHz >70 dB POWER CONSUMPTION Rated power 290 W (ref. 230V AC 50 Hz; 120V AC 60 Hz) Standby power <1 W Idle power...

  • Page 6: Rear Panel / Front Panel View

    REAR PANEL / FRONT PANEL VIEW REAR PANEL 13. IR IN/OUT MP INPUT TAPE IN/OUT CD INPUT 14. SPEAKERS SUB 1, SUB 2 TUNER INPUT 15. POWER SWITCH PRE OUT 16. AC MAINS INPUT 10. MAIN IN DISC INPUT 11. SOFT CLIPPING AUX INPUT 12.

  • Page 7: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS Remove machine screws M4.0 x 8.0 (x 4pcs) from the side panels. Remove tapping screw 3.0 x 8.0 (x 3pcs) from the back panel. Refer to Figure No. 1. Figure No. 1 Pull both sides of the TOP COVER slightly outwards and tilt approx. 35 ° and then remove in the direction as indicated.

  • Page 8: Wiring Diagram

    WIRING DIAGRAM Check these cables for damage caused by chassis lip. 90SC326PREDVR-9021000 90SC326PREDVR-9021000...
  • Page 9 WIRING DIAGRAM PARTS LIST Item Database Part Number Description Remark 17-012-4444-90 CABLE ASSY 3 WAYS AWG18 3.96P PIN 2 VOID PSU BD-J605, UL1672 L=170mm (B/BR) (RoHS) J606 17-012-4422-90 CABLE ASSY 9 WAYS AWG=26 2.5P UL1007 PSU BD-J601A L=240mm (RoHS) 17-012-2956-90 Cable assy 1 way AWG18 UL1007 BLACK L=100mm PHONE BD-J510 W/RING TERMINAL(RoHS)

  • Page 10: Block Diagram

    BLOCK DIAGRAM...

  • Page 11: Adjustment Points Diagram / Amplifier Adjustment

    ADJUSTMENT POINT DIAGRAM A. Idle Current adjustment 1. Turn on the unit without any input for 15 minutes 2. For left channel, adjust VR103 Voltage across TP1 & TP2 3 – 3.5mV 3. For right channel, adjust VR303 Voltage across TP3 & TP4 3 –...

  • Page 12: Pcb Layout

    PCB LAYOUT MAIN BOARD - COPPER SIDE 90SC326PREDVR-9021000 90SC326PREDVR-9021000...
  • Page 13 MAIN BOARD - COMPONENT SIDE 90SC326PREDVR-9021000 90SC326PREDVR-9021000...
  • Page 14 KEY BOARD & PHONE BOARD - COMPONENT SIDE C528 KEY BOARD & PHONE BOARD - COPPER SIDE...
  • Page 15 PSU BOARD - COMPONENT SIDE PSU BOARD - COPPER SIDE...

  • Page 16: Schematic Diagram

    SCHEMATIC DIAGRAM MAIN BOARD (1) R354 J501B +12V R101 Q309 Q310 MMBT5551 RL101-B C3320.1U Q307 MMBT5401 R352 R353 M106-C C101 MMBT5551 RL106-C RL108-C 100P RL101-C RL102-C RL103-C RL104-C RL105-C RL107-C DISC R102 Q308 C396 22p MMBT5551 R301 Q306 RL101-A +12V MMBT5087 IR_OUT R348 1K...
  • Page 17 MAIN BOARD (2) MOUNTED ON HEATSINK U104 J102B J302B 7805 D136 D135 D134 +37V +5VX 1N4007 CZ11B CZ11A Q160 Q360 8pin 8pin KSC2690 KSC2690 D132 +46V GS1G D133 CZ11-1 CZ11-1 1N4148 D139 D141 R206 CZ11-2 CZ11-2 100/1W FS 3.3V 1W 1N4007 VFB-L-CH VFB-L-CH...
  • Page 18 KEY BOARD J506 ISP HEADER KEY05 KEY06 R525 R524 KEY04 1.5K RESET THRM_SEN C527 0.1u D512 1N4148 R533 R534 R535 Q513 MMBT5551 C513 0.1u C514 **C528 10uF 50V R523 R542 S501 S502 S503 D513 +22V VIDEO 1N4148 +12V R543 25 PC2 KEY05 C524 S504...
  • Page 19 PSU BOARD R626 0.05 5W R603 0.05 5W R605 R606 Q603 MMBT5401 R601 R608 R604 D601 TYN612 600V 12A R607 J605 Q601 MMBT5401 To AC POWER CORD J604A Q602 MMBT5401 D603 D604 KBU8D KBU8D C603 C604 R602 C601 10nF 10nF 200V 8A 200V 8A 15000uF...

  • Page 20: Electrical Parts List

    ELECTRICAL PARTS LIST MAIN BOARD PCB ASSEMBLY 50-901-0326-90 C326 MAIN ASSY HFE specific (with Heatsink) REGULATORS U104 01-004-0048-90 IC VOLT REG 5V 1A TO-220 NJM7805FA ISOWATT (RoHS)(JRC) RESISTOR R253 R453 02-002-0172-90 RES MF 1.8K OHM 1% 1/2W AXIAL TAPE & REEL (RoHS) R239-240 R439-440 02-005-0074-90 MPR-RES 0.05 OHM 5W 5% E TYPE...
  • Page 21 C174-175 C374-375 03-004-0083-90 MPF CAP 0.22uF/63V/224J 5% Mini Box 7x3.5x7.5mm P=5 (RoHS) C173 C373 03-004-0085-90 MER CAP 0.01uF/630V/103K 10% MTC P=10 TC (RoHS) C172 C209 C372 C409 03-004-0086-90 MER CAP 0.1uF/250V/104K 10% MTCP=10 TC (RoHS) C170 C370 03-004-0115-90 CAP MpF 0.001uF 63V 5% DMF 5 SERIES (RoHS) DIODES D136 D141-142 D341-342...
  • Page 22 JACKS M104 15-002-0028-90 PHONE JACK 1 BLACK PCB MOUNT 3.5mm RIGHT(RoHS) M103 15-002-0030-90 PHONE JACK X2 BLACK PCB MOUNT 3.5mm RIGHT ANGLE SCJ351P00YS0B00G (RoHS) M108 15-003-0023-90 RCA JACK 2 B/B PCB MOUNT GOLD (W/SHIELD) (RoHS) M105 M106 15-003-0035-90 RCA JACK 6 W-W-W/R-R-R PCB MOUNT GOLD W/COVER (RoHS) M107 M109 15-003-0054-90...
  • Page 23 R213 R413 02-007-0147-90 SMD RES 5.6K OHM 0603 5% (RoHS) R196 R396 02-007-0149-90 SMD RES 1.8K OHM 0603 5% (RoHS) R152-154 R165-167 R204 R231 R234 02-007-0151-90 SMD RES 10 OHM 0603 5% (RoHS) R352-354 R365-367 R404 R431 R434 R220 R420 R481 02-007-0152-90 SMD RES 4.3K OHM 0603 5% (RoHS) R119 R319...
  • Page 24 R268 02-007-0436-90 RES SMD 12 OHM +/-5% 1/16W 0603 TYPE (ROHS) R709 R710 R809 R810 02-007-0441-90 RES SMD 2.2M OHM 5% 1/10W 0805 TYPE (RoHS) R178 02-007-0444-90 RES SMD 30K OHM 5% 1/16W 0603 TAPE (RoHS) R225 R233 R425 R433 02-007-0445-90 RES SMD 820 OHM 5% 1/16W 0603 TAPE (RoHS)
  • Page 25 C211 C221 03-009-0078-90 SMD CER CAP 47pF/50V 10% NPO 0603 TAPE (RoHS) C215 C216 C380 C415 C416 03-009-0081-90 SMD CER CAP 1uF/25V 20% Y5V 1206 TAPE (RoHS) C139 03-009-0105-90 CAP CER SMD 0.1uF 50V 10% X7R 1206 TAPE (RoHS) C214 03-009-0108-90 CAP CER SMD 39pF 50V +10% NPO 0603 TAPE (RoHS)
  • Page 26 Q353 05-004-0036-90 TRANSISTOR SS NPN HFE20 250MHz DTC123EKAT146(RoHS) (ROHM) Q127 Q129 Q133 Q135-137 Q327 Q329 05-004-0065-90 SMD TRANSISTOR MMBT5210 NPN Q333 Q335-337 SMD SOT-23 FAIRCHILD (RoHS) Q141 Q147 Q341 Q347 05-004-0066-90 SMD TRANSISTOR NZT560 NPN 3A/60V SMD SOT-223 FAIRCHILD (RoHS) Q105-106 Q112-113 Q125-126 Q128 05-004-0067-90 SMD TRANSISTOR MMBT5087 PNP...
  • Page 27 PSU BOARD PCB ASSEMBLY *AH 50-903-0326-90 C326 AH PSU ASSY PCB ASSEMBLY *C,CT 50-904-0326-90 C326 C/CT PSU ASSY U601 01-003-0104-90 IC TINYSWITCH-III TNY274PN DIP-8C U602 01-006-0033-90 IC FOD817C300 OPTOCOUPLER FAIRCHILD (RoHS) RESISTORS R627 02-001-0451-90 RES CONDUCTIVE PATH 3.9M OHM 1/2W 5% RNV1/2 395J (RoHS) R603 R626 02-005-0074-90 MPR-RES 0.05 OHM 5W 5% E TYPE...
  • Page 28 CHOKE L601 07-008-0002-90 LINE CHOKE 4 PIN 250VAC UL BASE (RoHS) TRANSFORMER T601 10-005-0295-90 TRANSFORMER SWITCHING EE16 C326 FUSE F601 *AH 20-001-0086-90 FUSE 3.15A 250V TIME LAG LBC 5x20mm TSD UL/CSA/VDE/SEMKO (RoHS) F601 *C/CT 20-001-0076-90 FUSE 1.6A 250V TIME LAG LBC 5X20mm TSD UL/CSA/VDE/SEMKO (RoHS) SMD RESISTORS...
  • Page 29 CAPACITORS C341 C342 03-002-0042-90 E CAP 4.7uF/50V ±20% 85*C 5x11mm P=2.0 GS (RoHS) C343 03-002-0043-90 E CAP 10uF/50V ±20% 85*C 5x11mm P=2.0 GS (RoHS) C115 C315 03-004-0031-90 MPF CAP 104J/63V 5% Mini Box 7x2.5x6.5mm P=5 (RoHS) C116 C316 03-004-0083-90 MPF CAP 0.22uF/63V/224J 5% Mini Box 7x3.5x7.5mm P=5 (RoHS) C117 C317 03-004-0090-90...
  • Page 30 JUMPERS JMP209-210 JMP212-213 JMP222-223 17-016-0077-90 Jumper wire Dia. 0.5mm L=52.0mm (RoHS) JMP226-228 JMP144 JMP189 JMP211 JMP214-220 17-016-0080-90 Jumper Wire Dia. 0.6mm For L Smaller than JMP224-226 14mm Roll (RoHS) J1/MOTOR J2/MOTOR KEYBOARD PCB ASSEMBLY 50-922-0326-90 C326 KEYBOARD ASSY CAPACITORS C514 C521 03-002-0010-90 E CAP 47uF/16V ±20% 85*C 5x11mm P=2.0 GS (RoHS)
  • Page 31 SMD CAPACITORS C511-513 C515 C518 C520 C527 03-009-0075-90 CAP CER SMD 0.1uF 50V 20% Y5V 0603 TAPE C503-510 C523 03-009-0113-90 CAP CER SMD 10nF 50V 10% X7R 0603 TAPE (RoHS) C517 C522 03-009-0116-90 CAP CER SMD 33pF 50V 10% X7R 0603 (RoHS) SMD DIODES D509-513...

  • Page 32: Ic Block Diagram

    IC BLOCK DIAGRAM Mainboard NJM7805FA (U104) NJM4560M (U101) TL431 (U103, U303) TL071CDR (U102, U301, U302)
  • Page 33 Keyboard ATMega48-20 (U503) HEF4094BT (U501, U502)
  • Page 34 Power Supply TNY274 (U601) PC817C (U602)

  • Page 35: Exploded View

    EXPLODED VIEW - A 90SC326PREDVR-9021000 **Note: Terminal post assembly part number 50-927-0326-90 is made up of the parts; 5, 6, 27, 35, 46, & 47 **Note: Power button and power button bezel are sold as one assembly: 13 & 14...
  • Page 36 EXPLODED VIEW - B NSP HFE SPECIFIC...

  • Page 37: Exploded View Parts List

    EXPLODED VIEW PARTS LIST ITEM PART NO. DESC. 10-005-0296-90 TRANSFORMER PW TOROIDAL 120V C326 TI-083438 (W/ M6 BOLTx1/ NUTx1/DISHx1/RUBBERx2) (RoHS) [FOR 120V VERSION] 10-005-0297-90 TRANSFORMER PW TOROIDAL 230V C326 TI-083444 (W/ M6 BOLTx1/ NUTx1/DISHx1/RUBBERx2) (RoHS) [FOR 230V VERSION] 11-001-0062-90 SWITCH ROCKER 1P1T BLK/BLK 10A/250VAC TV-5 UL/CSA/VDE/SEMKO (RoHS) 15-004-0093-90 AC SOCKET IEC 320 C18 2 PINS 15A/250V UL/CSA...
  • Page 38 22-005-0036-90 WASHER SPRING I/D 5.2 X O/D 8 X 1.2 THK ZINC NSP 4** NSP PLT (RoHS) 22-005-0042-90 WASHER SPRING I/D 6.5XO/D10.5X2.0mm THK 22-006-0081-90 Washer steel I/D 3.5 X O/D 8.0 0.4mm THK.Zinc plt(RoHS) 22-006-0083-90 WASHER STEEL ID6.5 X OD14 X 0.8 BLK PLT (RoHS) 22-006-0084-90 STEEL WASHER ID6.5 X 18 X 2.0mm BLACK ZINC (RoHS) 1 22-006-0090-90...

  • Page 39: Packing Diagram

    PACKING DIAGRAM & PARTS LIST ITEM PART NO. DESCRIPTION 24-003-0127-90 POLYBAG MAUNAL (RoHS) 24-004-1936-92 CARD WARRANTY NAD MODELS R.1 (RoHS) 24-004-2385-92 C326BEE OWNER’S MANUAL R.1 (RoHS) 24-003-0119-90 POLYBAG CORD (RoHS) 17-004-0026-90 AC Cord 110V 2 PINS 125V/13A SJT AWG18/3C UL/CSA...

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