NAD C 325BEE Service Manual
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NAD C 325BEE Service Manual

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NAD
C 325BEE
STEREO
AMPLIFIER
1

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Summary of Contents for NAD C 325BEE

  • Page 1 C 325BEE STEREO AMPLIFIER...

  • Page 2: Table Of Contents

    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 PROTECT IC CHANGE ....……………………………………..……...37...

  • Page 3: Service Caution

    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 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: Rear Panel/Front Panel View

    INPUT...

  • Page 6: Specifications

    SPECIFICATIONS POWER AMPLIFIER SECTION STEREO MODE CONTINUOUS AVERAGE POWER 50 W (17 dBW) OUTPUT INTO 8 OHMS OR 4 OHMS (Min. power per channel, 20 Hz – 20 kHz, with no more than rated distortion) Rated Distortion 0.03% (THD 20 Hz – 20 kHz) Clipping power 68 W (maximum continuous power per channel 4 and 8).

  • Page 7: Preamplifier Section

    PREAMPLIFIER SECTION LINE LEVEL INPUTS (Disk, CD, Video, Auxiliary, Tuner, Tape 1,Tape 2) Input impedance (R and C) 200 kohms + 320 pF Input sensitivity (ref. rated power) 220 mV Maximum input signal Signal / Noise ratio, A-weighted 93.0 dB ref. 1W (from CD Input to Speakers Output, Volume Setting for 500mV in , 8ohms 1W out) Signal to noise ratio preamp out, IHF “A”...

  • Page 8: Wiring Diagram

    WIRING DIAGRAM MAIN BOARD AC POWER PLUG POWER SWITCH AC OUTLET CB35 CB45 CB47 CB31 T401(TRANSFORMER) AMP-SMD-R BOARD CB32 CB21 Q215 CB34 P1-L -46V WHITE +46V RED P2-L AMP-SMD-L BOARD Q214 P5-GND Q114 IN MODULE BOARD CB11 CB33 P4-R 01-32560-01 +46V RED -46V WHITE P3-R...
  • Page 9 (1,2,3) (1,3) RT33 VOL+ VOLUME CONTROL VOLUME INPUT SELECTION CONTROL CIRCUIT (REMOTE) CIRCUIT (BY RELAY) VOL- MP L IC74 IC 75 CD4094 CD4094 MP R DISC L DISC R CD L 01-32560-01 01-32560-02 CD R RT31 VIDEO L BASS PRE-OUT L RT32 MUTE VIDEO R...
  • Page 10 IC71 24C01 11.0592M C710 27pF IC72 IS1U60L IC75 IC76 TCM810MEND 4094 IC73 AT89C4051 IC74 4094 Q717 PHONE71 Ipod IN...
  • Page 11 PIN CONFIGURATION CD4094 KEY BOARD IC74&IC75 STROBE DATA OUTPUT ENABLE SERIAL CLOCK SERIAL STAGES 3 - 7 STROBE LATCH LATCH LATCH * VDD OUTPUT ENABLE 3 - STSTE STATE STATE * ALLINPUTS PROTECTED BY CMOS PROTECTION NETWORK TL082D MAIN BOARD IC41&IC42&IC43 OUTPUT A INVERTING INPUT A OUTPUT B...
  • Page 12 uPC1237HA MAIN BOARD: IC44 8PIN PLASTIC SLIM SIP ICS BLOCK DIAGRAM VCC ON Overload Detector MUTE Output Offset Detector AC---OFF detector Switch for latch/automatic --reset...
  • Page 13 24C01 KEY BOARD IC71...

  • Page 14: Block Diagram

    AT89C4051 KEY BOARD IC73 Pin Configuration Block Diagram PDIP/SOIC RAM ADDR. FLASH RST/VPP 1 REGISTER (RXD) P3.0 2 P1.7 (TXD) P3.1 3 P1.6 XTAL2 4 P1.5 XTAL1 5 P1.4 ( INT0 ) P3.2 6 P1.3 ( INT1 ) P3.3 7 P1.2 PROGRAM STACK...

  • Page 15: Alignment Procedure

    ALIGNMENT PROCEDURES I. INITIAL A. LOWEST VOLUME ADJUSTMENT 1. Tune the volume pot to lowest state. 2. Input a high voltage signal such as 5V from CD input. 3. Connect a oscilloscope to L channel binding posts. 4. Observing the oscilloscope,adjust VR301,make the output of speakers become to the lowest level.

  • Page 16: Schematic Diagram(2/4)

    SCHEMATICS DIAGRAM PREAMP CIRCUIT Vm1.2 PCB-1:MAIN BOARD Vm2.0 RL31B RCA31A DISC CB31 C325BEE RELAY CONTROL CIR. R349 100p TAP1 RL32B DISC RCA31C TAP2 TUNER VIDEO R351 100p RL33B D310 D311 D312 D313 D316 +12V +12V +12V RCA32A 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148...
  • Page 17 SCHEMATICS DIAGRAM(1/4) AMP CIRCUIT Vm1.4 PCB-1:MAIN BAORD Vm2.0 +46V R130 82/1W FS R169 R162 D101 R132 R126 C114 1N4148 3K3/2W FP 3K3/2W FP 0.1u R142 +37V 39K,MF,5% +18V 220uF/63V 22,MF,5% R101 R154 SUPPLY CIR. Q103 C12/1 +18V +37V C3324-GR R119 R12/1 47uF/25V R427...
  • Page 18 SCHEMATICS DIAGRAM(4/4) C325BEE IR BOARD Vm1.0 IPOD BAORD Vm1.0 PCB-11:IR BOARD Vm1.0 PCB-9:IPOD BOARD Vm1.0 Ipod GREEN D719 CB72 CZ76 C724 C725 TP701 N.I. N.I. IC72 R763 IR RECEIVER R73 10K IS1U60L R765 R708 0.1u 0.1uF CON3 100u/16V N.I. SIGNAL C758 C759 C760...

  • Page 19: Schematics

    SCHEMATICS DIAGRAM (3/4) POWER CIRCUIT Vm1.2 PCB-2:POWER BOARD Vm2.0 R531 R562 0.05/3W 5% CE R561 R563 R532 Q517 A1015 A1015 NAD C325BEE POWER CIR. Q510 R558 CB55 CZ55 D531 TIC116D A1015 CON3 R533 R567 R534 AC POWER CORD C517 330K 0.47uF...

  • Page 20: Pcb Layout

    L-OUT R-OUT D412 IR IN D313 D312 D311 D310 D316 IR OUT COPYRIGHT C 2006 NAD ELECTRONICS +12V D430 IC45 NAD C325BEE MAIN BOARD Vm2.0 VIDEO CB31 CB47 TUNER TAPE2 TP10 TP11 DISC IC43 TAPE1 C429 C431 BUS-BAR (PRE-GND) C426...
  • Page 21 PCB-2:POWER BOARD Vm1.0 PCB-7:IN MODULE Vm1.0 To AC cord Q517 Q520 Q519Q518 CB55 COPYRIGHT C 2006 NAD ELECTRONIC NAD C325BEE MODULE BOARD Vm1.0 R613 R614 J513 R615 J510 R616 +46V -46V CB54 J520 R612 R611 C518 C61 Q61 CB51 C610...
  • Page 22 J738 J792 R760 (GND) C723 J749 J732 (GND) J729 R762 R702 COPYRIGHT C 2006 Q716 NAD ELECTRONICS Q717 C325BEE KEY BOARD Vm1.0 J719 R703 R730 D716 R764 J794 CB72 PCB-8:STANDBY BOARD Vm1.0 PCB-9:IPOD BOARD Vm1.0 PCB-11:IR BOARD Vm1.0 PCB-10:HEADPHONE BOARD Vm1.0 C325BEE STANDBY C325BEE IPOD BOARD Vm1.0...

  • Page 23: Bottom View

    P/N: 01-32520-02 PCB-5:AMP-SMD-R BOARD Vm1.0 (BOTTOM VIEW) (TOP VIEW) C325BEE AMP-SMD-R Vm1.0 C104 C103 C18 Q103 R105 Q104 Q102 Q101 R123 R112 R111 R116 R115 L12 R159 R149 R169 C124 CZ11 C325BEE AMP-SMD-L Vm1.0 C204 C203 C28 Q203 R205 Q204 Q202 Q201 R212...

  • Page 24: Troubleshooting Guide

    TROUBLESHOOTING GUIDE PUSH THE POWER SUPPLY CHECK THE AMBER LED CONTROL SWITCH TO ON CIRCUIT(Q72,Q73,Q74,LED717) CHECK 12V SUPPLY CHECK THE 5V SUPPLY CIRCUIT IS THE AMBER LED AMBER IS IT GREEN? IS IT RED? (ON POWER BOARD) LIGHT? CHECK THE LED CONTROL CIRCUIT(Q72,Q73,Q74,LED717) AND PROTECET CIRCUIT CAN PRESSING ANY KEY MAKE...

  • Page 25: Electrical Parts List

    ELECTRIAL PARTS LIST PCB-1: MAIN BOARD CIRCUIT NO. PART NO. DESCRIPTION IC41, IC42, IC43 03-00082-00 TL082CP/CN/D IC44 03-01237-00 UPC1237HA AMS1117-5.0/ IC45 03-01117-01 LM1117MPX-5.0 IC11, IC21 03-00431-03 AZ431BZ-B DIODES D430 DB104 D17, D27, D101, D102, D103, D201, D202, D203, D37, D38, D39, D310, 1N4148 (Pitch=7.5mm) D311, D312, D313, D315, D316, D42, D43, D403,...
  • Page 26 C327, C328, C119, C219 25-22361-01 22n, 63V, ±5% C329, C330 25-10461-05 0.1uF, 63V, ±5% C114, C115, C118, C214, 25-10461-01 0.1uF, 63V, ±10% C215, C218, C411, C412 C17, C27, C322, C321, C345, C346, C337, C338, 25-10461-06 0.1uF, 63V, ±10% C319, C320 C331, C332 25-22461-02 0.22uF, 63V, ±5%...
  • Page 27 R422, R423, R424, R425 07-10132-50 1K3, 1/6W, ±5% R428, R440, R158, R258 07-10222-51 2K2, 1/4W, ±5% R480 07-10392-51 3K9, 1/4W, ±5% R401, R482, , R333, R334, 07-10472-51 4K7, 1/4W, ±5% 07-10472-50 4K7, 1/6W, ±5% R429 07-10512-51 5K1, 1/4W, ±5% R166, R266 07-10562-50 5K6, 1/6W, ±5% R12/1...
  • Page 28 VR301, VR302 09-02101-00 100R VR12, VR22 09-02201-02 200R 09-02103-00 VR304, VR303 09-02303-00 RT31, RT32 09-01103-01 RK163121A2CA 10KAx2 RT33 09-01203-01 RK16812MG 20KBx2 RT34 09-01203-03 RK163121A10D 20KMN SWITCHS 11-05202-02 SK-22F03G7 SW31 11-02202-02 SPUN190700 RELAYS RL31, RL32, RL33, RL34, RL35, RL36, RL37, 12-02101-02 JRC-27F/012/S RL38,RL39 RL12/1...
  • Page 29 J3, J7, J28, J29, J38, J42, J46, J49, J50, J56, J57, J58, J59, J65, J88, J93, J94, J95, 101, J102, J105, J106, J107, J108, J110, J119, J120, J121, J126, J127, J128, J129, J130, J131, J135, J138, J139, 21-06000-00 L=5mm J140, J141, J150, J151, J152, J154, J155, J159, J160, J161, J162, J163, J172, J174, J175, J176,...
  • Page 30 C65, C66, C67, C68 24-10461-00 0.1uF, 63V, ±20% RESISTORS R617, R618, R619, R620 07-20100-50 10 , 1/6W, ±5% R615, R616 07-20330-50 33 , 1/6W, ±5% R61, R62 07-20221-50 220 , 1/6W, ±5% R69, R610 07-24300-50 430 , 1/6W, ±1% R67, R68, R611, R612 07-20102-50 1K , 1/6W, ±5% R613, R614...
  • Page 31 R169 07-93300-01 330 , ±1% R19, R101, R105, R110 07-93902-01 39K , ±1% R123 07-94702-01 47K , ±1% R121, R122 07-91003-01 100K , ±1% R102, R104 07-92203-01 220K , ±1% CAPACITORS C18, C19 26-39051-01 39pF, 50V, ±5% C12, C124 26-10251-11 1nF, 50V, ±5% C13, C14 06-10031-02...
  • Page 32 SCN 2.5A-7D needles,XHB 2.5A-7Y CB53——CB47 14-32507-10 plug. 26AWG UL2468# white, 230mm length LINKS J52, J57, J513, J517 21-06000-00 J516, J520 21-06000-00 L=7.5 21-06000-00 L=10 J514 21-10101-00 L=10 J54, J58, J518 21-06000-00 L=12.5 J510 21-06000-00 L=15 21-10151-00 L=15 J515 21-06000-00 L=18 J519 21-10201-00 L=20...
  • Page 33 SCN 2.5A-9D needle,XHB 2.5A-9Y CZ71--CB34 14-32509-00 plug. 26AWG UL2468#, white , 400mm length SCN 2.5A-10D needle,XHB 2.5A- CZ72--CB31 14-32510-00 10Y plug. 26AWG UL2468#, white , 430mm length LINKS J71, J72, J73, J74, J75, J79, J710, J716, J733, 21-06000-00 J735, J745, J746, J747, J749, J753, J794 J76, J77, J78, J715, J717, J718, J727, J738, J740,...
  • Page 34 Heatsink (SMALL2) 70-065002-0 ALU 6063 BLACK Machine Screw 61-022510-5 MB2.5×10 Machine Screw 61-022514-5 MB2.5×14 62-010202-5 M2.5 RIVET 61-382003-5 GB975-86-2.5×3 CONNECTERS VH 3.96A-3Y(delete center needle) plug. 14-32502-23 18AWG UL1672#, CB59——AC OUTLET(AH) red/blue,180mm length. VH3.96A-3Y(delete center needle) plug,18AWG 14-32502-33 CB56——POWER SWTICH UL1672# . red/blue,160mm length.

  • Page 35: Exploded View

    EXPLODED VIEW T001 S011 S010 C013 C012 C011 S011 S012 S010 C010 R004 C009 R003 R005 S012 C007 R002 S013 R001 C008 S009 S005 R006 S006 S002 S004 F018 S002 S002 S001 F017 S002 F020 F002 S001 S001 S001 C006 F014 S001 F011...

  • Page 36: Exploded View Parts List

    EXPLODED VIEW PARTS LIST REF.NO PART NO. DESCRIPTION Qty. REF.NO PART NO. DESCRIPTION Qty. 66-065001-0 C001 Chassis F016 01-32503-00 KEY BOARD ASSY 66-001004-1 Base Cover 74-065001-0 Power Button C002 F017 75-010004-0 Foot 92-048001-0 Spring For Button C003 F018 78-001002-0 Foot Pad 01-32508-00 Standby Board Assy C004...

  • Page 37: Protect Ic Change

    PROTECT IC CHANGE 100k 4.7V 100N 220k 2SA1015GR 2SA1015GR 220k 820k 180k 100k 2SA1015GR 2SC1815GR 2SC1815GR 2SC1815GR 1N4148 1N4148 2SC1815GR 2SC1815GR 0.22UF 2SC1815GR 4.7k 2SC1815 100k 100k Protect Module CON8 This Protect Module replaces Protection IC 44 Remove part below: R442 Remove 56K Ohm resistor Replace and change orientation the part below: C421 From 4.7uF/50V to 0.47uF/50V.
  • Page 38 © NAD 2006 NAD ELECTRONICS LTD TORONTO...

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