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NAD C 325BEE, Service Manual, Page: 2 / 37

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NAD C 325BEE Service Manual Download Page 2

TABLE OF CONTENTS 

DESCRIPTION  

 

 

 

 

 

 

 

       P A G E 

SERVICE CAUTION………………………………………………………… 3-4

REAR PANEL/FRONT PANEL VIEW………………………………………...5

SPECIFICATIONS………………………………………………………….6-7 

WIRING DIAGRAM………………………………………………………………8 

 

BLOCK DIAGRAM……………………………………………………. …….9-14

  

ALIGNMENT PROCEDURE……………………………………………..15

 

SCHEMATICS……………………………………………………………….16-19

  

PCB LAYOUT……………………………………………………………… 20-23

 

TROUBLE SHOOTING GUIDE…………………......................................24

 

ELECTRICAL PARTS LIST…………………………………………….25-34 

 

EXPLODED VIEW……………………………………………………………..35 

 

EXPLODED VIEW PARTS LIST……………………………………………...36 

2

 

PROTECT IC CHANGE ..............

……………………………………

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……...3

7

 

www.hifiengine.com

Summary of Contents for C 325BEE

Page 1: ...NAD SERVICE MANUAL C 325BEE STEREO AMPLIFIER C 325BEE STEREO AMPLIFIER 1 www hifiengine com...

Page 2: ...RONT PANEL VIEW 5 SPECIFICATIONS 6 7 WIRING DIAGRAM 8 BLOCK DIAGRAM 9 14 ALIGNMENT PROCEDURE 15 SCHEMATICS 16 19 PCB LAYOUT 20 23 TROUBLE SHOOTING GUIDE 24 ELECTRICAL PARTS LIST 25 34 EXPLODED VIEW 35...

Page 3: ...TWEEN 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...

Page 4: ...tal 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 cal...

Page 5: ...87 9 2 1387 8 1387 781 5 INPUT 7 3 1 287 7 3 1 287 35 287 0 1 1 63 5 287 62 7 33 1 1 25 9 75 5 287 6 7 287 7 21 25 32 5 32 5 67 1 3527 7 21 3 21 5 5 9 5 1387 6 725 62 7 33 1 LED 721 21752 6 721 7 1 92...

Page 6: ...nel 8 ohms 110 W 20 4 dBW 4 ohms 160 W 22 0 dBW 2 ohms 210 W 23 2 dBW Damping factor 100 ref 8 ohms 1 kHz Input Impedance R 20 kohms C 1 nF Input sensitivity for rated output into 8 ohms 630 mV Voltag...

Page 7: ...requency response 20 Hz 20 kHz 0 1 dB tone defeat on 0 5 dB tone defeat off THD Noise SMPTE IM 0 01 at 5 V out LINE LEVEL OUTPUTS Pre amp output impedance 80 ohms Tape output impedance Source Z 1kohms...

Page 8: ...CB57 CB59 CB56 CB51 OUT MODULE BOARD CB73 CB74 S72 S71 S73 S74 S 7 6 S75 CZ73 CB72 CZ71 S 7 7 CZ72_1 CB61 CB61 CZ74 CZ75 KEY BOARD AMP SMD R BOARD IN MODULE BOARD AMP SMD L BOARD CB32 CB21 CZ11 CZ21 C...

Page 9: ...CUIT R POWER AMP PROTECTION CIRCUIT IC44 UPC1237HA RL12 2 ISC CIRCUIT IC43 TL082D TRIG I V MIRROR SOURCE SCR CIRCUIT 1 2 3 4 5 VOL VOL VOLUME CONTROL CIRCUIT REMOTE MUTE CIRUIT JK41 R467 POSISTOR 80 D...

Page 10: ...15 P1 4 16 P1 5 17 P1 6 18 P1 7 19 VCC 20 IC73 AT89C4051 NC 1 NC 2 NC 3 Vss 4 SDA 5 SCL 6 NC 7 Vcc 8 IC71 24C01 C79 C710 27pF Y71 11 0592M Q1 4 Q2 5 Q3 6 Q4 7 Q5 14 Q6 13 Q7 12 Q8 11 QS 9 QS 10 STR 1...

Page 11: ...NPUTS PROTECTED BY CMOS PROTECTION NETWORK CL CL 8 CL CL n p D Q Q 10 CL CL n p Q S SERIAL OUT 11 Q8 TR TR LATCH 8 3 STATE 8 10 QS SERIAL OUT STAGES 3 7 4 5 6 7 12 13 14 LATCH 2 3 STATE 2 CLOCK STROBE...

Page 12: ...IC44 Overload Detector Output Offset Detector Switch for latch automatic reset Flip Flop VCC ON MUTE AC OFF detector Relay driver 1 2 4 3 5 7 8 6 GND VCC ICS BLOCK DIAGRAM 1 8 8PIN PLASTIC SLIM SIP 1...

Page 13: ...1 3 1 21 85 7 21 21752 2 2 5 6 9 5 66 5 67 5 203 5 725 25 5 66 2817 5 92 7 1 5 725 7 0 1 21752 3520 55 2 5 7 5 67 5 ORFN 2 1 3 6 6 9FF Q026 81 7 21 2 5 0 1 2 3 4 5 6 7 8 NC NC NC VSS VCC NC SCL SDA 13...

Page 14: ...P1 5 17 P1 6 18 P1 7 19 VCC 20 RAM ADDR REGISTER RMA B REGISTER ACC TMP2 TMP1 ALU PSW TIMING AND CONTROL INSTRUCTION REGISTER OSC ANALOG COMPARATOR PORT 1 LATCH PORT 1 DRIVERS PORT 3 DRIVERS PORT 3 L...

Page 15: ...NG CURRENT 2 Connect a DC voltmeter toTP1 and TP2 adjust VR22 for 4mV reading on voltmeter 3 Connect a DC voltmeter toTP3 and TP4 adjust VR12 for 4mV reading on voltmeter 1 Level power on for a minimu...

Page 16: ...K R404 10K R403 1K R405 1K R406 1K C417 4u7 25V C418 4u7 25V RL31C RL32C RL33C RL34C RL35C RL36C RL37C RL38C D37 1N4148 D38 1N4148 D39 1N4148 D310 1N4148 D311 1N4148 D312 1N4148 D313 1N4148 VOLUME CON...

Page 17: ...1 2 3 4 SPKOUT D42 1N4148 D43 1N4148 R437 47K STANDBY R440 2K2 18V ISC CIRCUIT 12V Protection Soft Cliping 5V 18V 18V 5V 18V 18V 12V Standby STANDBY R45 33 0 5W FS R41 680 R43 680 R47 680 C43 220u 63...

Page 18: ...CB31 TO CB34 MUTING BLINK GREEN GREEN GREEN GREEN GREEN GREEN 5V Q74 C1815 R701 2K2 Q73 C1815 12V Q717 2SC1815 R703 2K2 R702 10K NC 1 NC 2 NC 3 Vss 4 SDA 5 SCL 6 NC 7 Vcc 8 IC71 24C01 IR IN IR OUT IR...

Page 19: ...2 3 4 5 6 7 CB51 CON7 8V 0V 1 2 3 4 5 6 7 CB53 D56 DB104 36 4V 36 4V 0V 28 5V 28 5V WHITE RED Q519 A1015 Q520 C1815 Q59 A1015 Q510 A1015 Q517 A1015 Q518 C1815 1 2 CB54 R567 330K 37v 37v 8V 0V 1 2 CB52...

Page 20: ...4 J67 J68 C43 C411 J153 J85 GND J207 J79 J84 J86 18V GND J80 J82 GND Q401 R402 C417 R403 R405 R404 R406 Q402 C48 C303 R407 C414 Q403 C418 C302 J89 RT33 H2 Q404 R412 R414 Q42 R401 R427 R495 Q422 Q423 R...

Page 21: ...GND J515 D56 D513 C523 CB53 R544 0V I V C517 8VAC 37V 37V TRIG AC DET R531 46V CB52 WHITE J519 CB58 46V RED GND F52 D51 J56 D531 J514 J512 GND 46V D55 F53 C54 D532 C518 J51 C53 J520 46V RED CB54 46V...

Page 22: ...CZ76 PCB 11 IR BOARD Vm1 0 RED R CZ75 RED L C760 D719 WHITE C759 G TP701 S V IC72 CZ45 R455 S73 S 7 7 R725 J753 S72 S71 NAD ELECTRONICS COPYRIGHT C 2006 R748 R749 J732 J731 J736 R733 D718 D72 C712 J7...

Page 23: ...5 Q27 Q29 C29 Q24 Q26 C28 Q203 Q28 R29 Q201 R221 R254 R203 R202R201 R219 D23 C203 D25 R123 Q13 C124 R169 L12R159 Q12 R116 R115 R111 Q15 Q17 C19 Q14 Q16 C18 Q103 R149 R19 C13 C12 R121 R154 R103 R102 Q1...

Page 24: ...ORMAL YES THE UNIT WORK NORMALLY YES NO YES NO YES NO YES NO LIGHT YES YES CHECK 12V SUPPLY CHECK THE LED CONTROL CIRCUIT Q72 Q73 Q74 LED717 AND PROTECET CIRCUIT CHECK MCU AND RELAY CONTROL CIRCUIT IS...

Page 25: ...1015 00 2SA1015 GR QI1 Q11 Q21 Q43 Q46 Q48 Q402 Q404 Q412 Q414 Q421 31 01815 00 2SC1815 Q117 Q217 31 00970 00 2SA970 GR Q423 Q118 Q218 31 02240 00 2SC2240 Q422 31 00667 00 2SD667A Q413 Q41 Q216 Q211 Q...

Page 26: ...225 C226 100uF 63V 20 N I C413 C414 06 22131 00 220uF 35V 20 C15 C16 C25 C26 C43 C44 06 22161 00 220uF 63V 20 C422 06 33111 01 330uF 16V 20 C444 06 47211 00 4700u 16V 20 RESISTORS R169 R269 07 91204 0...

Page 27: ...7 10394 51 390K 1 4W 5 R472 R156 R157 R256 R257 07 10474 51 470K 1 4W 5 R337 R338 R339 R341 R342 R343 R349 R350 R351 R352 R353 R354 R355 R356 R357 R358 R394 R395 07 10105 51 1M 1 4W 5 R327 R328 07 201...

Page 28: ...B47 13 22507 00 XHB2 5A 7A CB34 13 22509 00 XHB2 5A 9A CB31 13 22510 00 XHB2 5A 10A RCA31 RCA32 RCA34 17 01004 00 4 holes red and white gilt RCA33 17 01006 00 6 holes red and white gilt PHONE2 17 0200...

Page 29: ...J31 J54 J55 J80 J132 J181 J182 J188 J189 J193 21 06000 00 L 15mm J8 J14 J15 J16 J17 J18 J19 J20 J21 J33 J34 J60 J76 J82 J112 J206 21 06000 00 L 18mm J22 J23 J24 J75 J81 J83 J92 J97 J98 J103 J109 J144...

Page 30: ...206 R219 R220 07 98209 01 82 1 R211 R212 R259 07 91000 01 100 1 R269 07 93300 01 330 1 R29 R201 R205 R210 07 93902 01 39K 1 R223 07 94702 01 47K 1 R221 R222 07 91003 01 100K 1 R202 R204 07 92203 01 22...

Page 31: ...51 500R CAPACITORS C54 25 47422 00 MKP62 275V 0 47uF 10 MPX 275VAC 0 47uF 10 C53 05 47242 00 4n7p 400V 20 78 001001 0 811810 23 C51 C52 25 10322 00 10n 250V 10 C524 06 22251 00 2200u 50V 20 C523 06 33...

Page 32: ...4148 D718 33 44148 00 1N4148 D71 D72 D73 D74 D76 D77 D716 33 50350 00 3 GREEN LED D75 33 50340 00 3 AMBER LED CRYSTAL Y71 04 11102 00 11 0592MHz CL 15pF CAPACITORS C79 C710 05 27051 00 27p 50V 10 C724...

Page 33: ...0 50 10 1 6W 5 CONNECTER PHONE71 17 02001 02 SCJ340R0GBS0B00 TP701 front panel 14 32501 12 1007 24AWG black 35mm length CZ75 CB35 14 32503 11 SCN 2 5A 3D needles XHB 2 5A 3Y plug UL1691 24AWG 26AWG wh...

Page 34: ...8AWG UL1672 red blue 180mm length CB59 AC OUTLET AH 14 32502 33 VH3 96A 3Y delete center needle plug 18AWG UL1672 red blue 160mm length CB56 POWER SWTICH 15 02251 20 WB01HS 001 AC CORD C 15 10121 10 W...

Page 35: ...6 F014 F017 F018 S004 R001 R004 R005 R003 R002 C003 C002 C004 C001 R006 F010 F009 S010 S012 S009 S001 S008 S007 S007 F016 S001 S001 S006 S005 S001 S002 S002 C014 C005 S002 S001 S001 S001 S001 S002 S01...

Page 36: ...Label 1 R006 30 63200 00 Shorting Plug 2 C014 75 065001 0 PCB Spacer 1 T001 67 065004 0 Top cover 1 F001 77 065002 0 Fascia 1 F002 66 065002 0 Subfascia 1 F003 77 001007 1 Power Button Bezel 1 F004 77...

Page 37: ...220k Q18 2SC1815GR Q12 2SA1015GR R17 100k D12 1N4148 R18 100k R14 22k C10 1N D13 4 7V C11 100N Protect Module Q19 2SC1815 R23 56K R26 10k C12 0 22UF R27 10k R28 10k This Protect Module replaces Prote...

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