NAD-C326BEE-int-sm 维修电路原理图.pdf
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1、NADSERVICE MANUALC 326BEEC 326BEEStereo Integrated Amplifier Stereo Integrated AmplifierDRAFT DATE: June 2011RadioFans.CN 收音机爱 好者资料库2SAFETY INFORMATION1.5ARadioFans.CN 收音机爱 好者资料库3SERVICE SAFETY PRECAUTIONS1. Replacing the fusesCAUTION:FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WI
2、TH SAME TYPE OF FUSE.Reference Designator Database Part Number DescriptionF601*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 LBC 5X20mm TSD UL/CSA/VDE/ SEMKO (RoHS) NOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY.2
3、. Safety check out(Only U.S.A. model)Before returning the product to the customer, make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from supply circuit.Parts marked with the symbol are critical with regard to the risk of fire and electric shock
4、. CONTENTSDESCRIPTION PAGESPECIFICATIONS .4 - 5REAR PANEL / FRONT PANEL VIEW .6DISASSEMBLY INSTRUCTIONS .7WIRING DIAGRAM . .8 - 9BLOCK DIAGRAM.10ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT .11PCB LAYOUT .12 - 15SCHEMATIC DIAGRAM .16 - 19ELECTRICAL PARTS LIST .20 - 31IC BLOCK DIAGRAM .32 - 34EXP
5、LODED VIEW .35 - 36EXPLODED VIEW PARTS LIST .37 - 38PACKING DIAGRAM .394SPECIFICATIONSPRE AMPLIFIER SECTIONLINE LEVEL INPUT, PRE-OUTTHD (2 Vin 2 Vout, CCIF IMD, DIM 100) 0.004 % (ref. 20 Hz 20 kHz)Signal/Noise ratio IHF 100 dB (A-weighted, ref. 500 mV) 108 dB (A-weighted, ref. 2V, Volume max.) 92 dB
6、 (A-weighted, ref. 100 mV in 100 mV out - unity gain)Channel separation - 1 kHz 80 dB 10 kHz 70 dBInput impedance (R and C) 100 k+ 320 pFMaximum input signal 8 Vrms (ref. 0.1 THD)Output impedance - Pre out 75 Tape out Source Z + 1 kInput sensitivity 159 mV (ref. 500 mV out)Frequency response 0.1 dB
7、(ref. 20 Hz - 20 kHz, Tone defeat ON) 0.5 dB (ref. 20 Hz - 20 kHz, Tone defeat OFF)Maximum voltage output - IHF load 10 V (ref. 0.03% THD)600 ohms load 10 V (ref. 0.03% THD)TONE CONTROLSTreble 5 dB at 10 kHzBass 8 dB at 100 HzPOWER AMPLIFIER SECTIONMAIN IN, SPEAKER OUTContinuous output power into 8
8、and 4 (Stereo) 50 W (ref. rated THD, 20 Hz-20 kHz, both channels driven) Rated THD (CCIF IMD, DIM 100) 65 W (ref. 1 kHz 1% THD)IHF dynamic power - 8 100 W 4 150 W 2 200 WPeak output current 20 A (ref. 1 , 1 ms)Signal/Noise ratio 100 dB (A-weighted, ref. 1 W) 117 dB (A-weighted, ref. 150 W)Damping fa
9、ctor 100 (ref. 8 , 50 Hz and 1 kHz)Frequency response 0.1 dB (ref. 20 Hz - 20 kHz) 3 Hz 70 kHz (ref. -3 dB)Input impedance 20 k + 1 nFInput sensitivity 630 mV (ref. rated power)Voltage gain 29 dBHeadphone output impedance 68 Channel separation - 1 kHz 80 dB 10 kHz 70 dBTRIGGER OUTOutput resistance 1
10、00 Output current 50 mAOutput voltage +12 VOVERALL SPECIFICATIONSCD IN, SPEAKER OUTTHD (250 mW to rated power, CCIF IMD, DIM 100) 94 dB (A-weighted, ref. 1 W) 110 dB (A-weighted, ref. 50 W, volume set for 2V 5Frequency response 0.2 dB (ref. 20 Hz - 20 kHz, Tone Defeat ON) 10 Hz 65 kHz (ref. -3 dB)Ch
11、annel separation - 1 kHz 80 dB 10 kHz 70 dBPOWER CONSUMPTIONRated power 290 W (ref. 230V AC 50 Hz; 120V AC 60 Hz)Standby power 1 WIdle power 35WPHYSICAL SPECIFICATIONSDimensions (Width x Height x Depth) 435 x 100 x 286 mm (Net) 435 x 116 x 332 mm (Gross*) * - Gross dimensions include feet, volume kn
12、ob and extended speaker terminals.Net Weight 7.1 Kg (15.62 lbs)Shipping Weight 9.1 Kg (20.02 lbs)6FRONT PANELREAR PANEL / FRONT PANEL VIEWREAR PANEL1. MP INPUT2. CD INPUT3. TUNER INPUT4. DISC INPUT5. AUX INPUT6. VIDEO INPUT 1. STANDBY2. STANDBY LED3. SOFT CLIPPING INDICATOR4. REMOTE SENSOR5. PHONES6
13、. MP SOCKET7. INPUT SELECTOR 8. TONE DEFEAT9. TONE CONTROLS10. BALANCE11. VOLUME7. TAPE IN/OUT8. SUB 1, SUB 29. PRE OUT 10. MAIN IN11. SOFT CLIPPING12. +12V TRIGGER OUT13. IR IN/OUT14. SPEAKERS15. POWER SWITCH 16. AC MAINS INPUT1111095678234143256789101216151413117DISASSEMBLY INSTRUCTIONS1. Remove m
14、achine 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. 2. Pull both sides of the TOP COVER slightly outwards and tilt approx. 35 and then remove in the direction as indicated. Refer to Figure No. 2. Figure No. 1Figu
15、re No. 28WIRING DIAGRAMCheck these cables for damage caused by chassis lip.90SC326PREDVR-902100090SC326PREDVR-90210009WIRING DIAGRAM PARTS LISTItem Database Part Number Description Remark1 17-012-4444-90 CABLE ASSY 3 WAYS AWG18 3.96P PIN 2 VOID PSU BD-J605, UL1672 L=170mm (B/BR) (RoHS) J606 2 17-012
16、-4422-90 CABLE ASSY 9 WAYS AWG=26 2.5P UL1007 PSU BD-J601A L=240mm (RoHS) 3 17-012-2956-90 Cable assy 1 way AWG18 UL1007 BLACK L=100mm PHONE BD-J510 W/RING TERMINAL(RoHS) 4 17-012-4536-90 CABLE ASSY 2 WAYS AWG26 2.5P UL2468 L=700 PHONE BD- (RoHS) J508A5 17-012-4424-90 CABLE ASSY 7 WAYS AWG=28 2.0P U
17、L1007 L=350mm KEY BD-J506A (RoHS) 6 17-012-4425-90 CABLE ASSY 6 WAYS AWG=28 2.0P UL1007 L=410mm KEY BD-J507A (RoHS) 7 17-012-4426-90 CABLE ASSY 10 WAYS AWG=28 2.0P UL1007 KEY BD-J501A L=420mm (RoHS) 8 17-012-4427-90 CABLE ASSY 2 WAYS AWG=26 2.5P UL1007 L=80mm KEY BD-J504A (RoHS) 9 17-012-4423-90 CAB
18、LE ASSY 15 WAYS AWG=26 2.5P UL1007/1533 VOL BD-J201A L=80mm (RoHS) 10 17-012-4420-90 CABLE ASSY 2 WAYS AWG=16 3.96P WHI/RED MAIN BD-J13/ UL1015 L=100mm (RoHS) J16, J14/J1511 17-012-4428-90 CABLE ASSY 5 WAY AWG26 2.5P UL1007 L=250mm MAIN BD-J101A (RoHS) 12 17-012-4483-90 CABLE ASSY 1 WAY AWG14 UL1015
19、 L=80mm BLACK MAIN BD-J104, W/ RING TERMINAL (RoHS) J20413 17-012-4484-90 CABLE ASSY 1 WAY AWG14 UL1015 L=110mm WHITE MAIN BD-J103 W/ RING TERMINAL (RoHS) 14 17-012-4485-90 CABLE ASSY 1 WAY AWG14 UL1015 L=110mm RED MAIN BD-J203 W/ RING TERMINAL (RoHS) 15 17-012-4521-90 CABLE ASSY 3 WAYS AWG16 3.96P
20、BLACK UL1015 MAIN BD-J7A/ L=200/120/220mm (RoHS) P6/J6A 16 17-012-4529-90 CABLE ASSY 2 WAYS AWG26x1C 2.5P UL1533 L=90 MAIN BD- (RoHS) J306A/B 17 17-012-4530-90 CABLE ASSY 2 WAYS AWG26x1C 2.5P UL1533 L=110 MAIN BD- (RoHS) J106A/B18 17-012-4531-90 CABLE ASSY 2 WAYS AWG26x1C 2.5P UL1533 L=130 MAIN BD-
21、(RoHS) J105A/B 19 17-012-4532-90 CABLE ASSY 2 WAYS AWG26x1C 2.5P UL1533 L=180 MAIN BD- (RoHS) J305A/B 10BLOCK DIAGRAM11ADJUSTMENT POINT DIAGRAMA. Idle Current adjustment1. Turn on the unit without any input for 15 minutes2. For left channel, adjust VR103 Voltage across TP1 & TP2 3 3.5mV3. For right
22、channel, adjust VR303 Voltage across TP3 & TP4 3 3.5mV4. With the unit keep turning on, wait for another 15 minutes5. Re-adjust VR103 Voltage across TP1 & TP2 3 3.5mV6. Re-adjust VR303 Voltage across TP3 & TP4 3 3.5mVB. ISC adjustment1. Turn VR304 fully anti-clockwise,2. Use 500mV, 1kHz sine wave, C
23、D input, 4 ohm loading to both channels3. Increase the output power of both channels to 8V4. Slowly rotate VR304 clockwise until the voltage at TP10 is the same as TP115. Verify the output at 20kHz 8 ohm loading to both channels are larger than 21V, if not, repeat step 1-4 again12PCB LAYOUTMAIN BOAR
24、D - COPPER SIDE90SC326PREDVR-902100090SC326PREDVR-902100013MAIN BOARD - COMPONENT SIDE90SC326PREDVR-902100090SC326PREDVR-902100014KEY BOARD & PHONE BOARD - COMPONENT SIDEKEY BOARD & PHONE BOARD - COPPER SIDEC52815PSU BOARD - COMPONENT SIDEPSU BOARD - COPPER SIDE16SCHEMATIC DIAGRAM MAIN BOARD (1)ipod
25、-Lipod-RDISCCDVIDEOAUXTUNERTAPETAPE OUTMPTONE DEFEAT SWOFFONONOFFTONE DEFEAT SWIN MODULEOUT MODULETONE CONTROL L/CHL PRE-OUTR PRE-OUTIR INIR OUTTONE CONTROL R/CH80 degree: 330 ohm max.90 degree: 470 ohm min.IN MODULEOUT MODULELRRLRLRLRLRLRLRLSUBWOOFER OUTVOLUME BOARDR1 01470R1 021 MR1 041 MR1 03470R
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