Cambridge-740A-pwr-sm维修电路原理图.pdf

Gallery Court Hankey Place London SE1 4BB UK Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 740A Issue Date: 8th August 2007 SERVICE MANUAL SPECIFICATIONS: Power Output 100W RMS into 8 Ohms 150W RMS into 4 Ohms THD (unweighted) < 0.001% 1 kHz At 80% of rated power 96 dB Input Impedances Inputs 1-6 47 kOhm Power Amp Damping Factor 110 at 1 kHz Max Power Consumption 750W Minimum Power Consumption Active (no signal) 45W Standby 6W Bass furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. 6. When servicing, care should be taken to observe the original routing and dressing of the leads and it should be confirmed that they have been returned to normal after re-assembly. Notes on chip component replacement Never reuse a component that has been removed from a PCB Notice that the minus side of a tantalum capacitor may be damaged by heat COPYRIGHT NOTICE. 2007 Audio Partnership PLC. All rights reserved. Cambridge Audio and Azur are registered trademarks for Audio Partnership PLC. This document may not be reproduced, distributed, transmitted, displayed, published, or broadcast without the express written prior permission of Audio Partnership PLC. Alteration or removal of any trademark, copyright, or other notice from this content is prohibited. Information provided in this document is provided solely for the use of official service agents in repairing and servicing Audio Partnership PLC products. 4 Cambridge Audio Azur 740A Amplifier Exploded Diagram (Complete Unit) 3 3 2 15 To enhance viewing, please print to A35 Cambridge Audio Azur 740A Amplifier Exploded Diagram (Chassis Assembley) 13 10 9 8 1 16 To enhance viewing, please print to A36 Cambridge Audio Azur 740A Amplifier Exploded Diagram (Front Panel Assembley) 7 6 4 5 To enhance viewing, please print to A37 Cambridge Audio Azur 740A Amplifier Exploded Diagram (Rear Panel Assembley) 11 12 14 To enhance viewing, please print to A38 Cambridge Audio Azur 740A Amplifier Exploded Diagram Parts List no i tp i r cseDno i t ang i seDyrot caFrebmuNt r aPf eRgn iwarD 1PY12373200-063073E000Azur-740A 230V Transformer TI-063073D For EU Version -PY12423200-063074E000Azur-740A 110V Transformer For CU (USA) Version 2PY13386574-150018E000-02Azur 740A Top Panel-S (With Painted) -PY13396574-150018E000-01Azur 740A Top Panel-B (With Painted) 3PY13406574-150020E000-02Azur-740A Side Panel-S (With Painted) -PY13416574-150020E000-01Azur-740A Side Panel-B (With Painted) 4PY13428574-015010E301Azur-740A Front Panel-S Assy Rev A (Metal plus PCB) -PY13438574-015020E301Azur-740A Front Panel-B Assy Rev A 5PY13446574-150029E000A01Azur-740A Front Panel Artwork-S (AP200931) (metal) -PY13456574-150029E000-01Azur-740A Front Panel Artwork-B 6PY13469474-015000E041Azur-740A Control PCBA Rev A 7PY11382409-010200E001Rotary Encoder Switch REB161(9*7)PVB20FHINB1-2-24E 8PY13479474-015000E091Azur-740A Amp Power PCBA (AP19797/A) Rev A 9PY13489474-015000E001Azur-740A Protection Circuitry PCB-A Assy Rev A 10PY13499474-015000E101Azur-740A Protection Circuitry PCB-B Assy Rev A 11PY13509474-015000E331Azur-740A A-Bus Hub PCBA REV A 12PY13512404-040100E001Piano DIP Switch 4P DPL-04K Series 13PY13529474-015000E341Azur-740A Input PCBA Rev A 14PY13222333-008919E003WP8-22 8 Way SPK Terminal 4Blk/4Red Gold Plating for 740A 15PY11659805-084000E001Azur-740/840/A/C Remote Control Assy Rev A 16PY11226074-150004E000Plastic foot black -PY11256074-150004E000A01Plastic foot silver 9 Cambridge Audio Azur 740A Amplifier AP19784/3 Front Panel Circuit Diagram (Tone Control) R103 4K7 1/4WMetalFilm +15V -15V R106 2K2 1/4WMetalFilm R107 2K2 1/4WMetalFilm R203 4K7 1/4WMetalFilm +15V -15V R206 2k2 1/4WMetalFilm R207 2K2 1/4WMetalFilm R R L L 2 3 1 84 U100:A NE5532P AudioOpAmp 6 5 7 U100:B NE5532P AudioOpAmp 2 3 1 84 U200:A NE5532P AudioOpAmp 6 5 7 U200:B NE5532P AudioOpAmp R R L L C104 47nF63V Met. Polyester C106 47nF63V Met. Polyester C204 47nF63V Met. Polyester C206 47nF63V Met. Polyester C103 10pF50V NP0 Ceramic C203 10pF50V NP0 Ceramic C207 10pF50V NP0 Ceramic C107 10pF50V NP0 Ceramic C101 1.5nF63V Met. Polyester C201 1.5nF63V Met. Polyester R L -15V +15V SHIELD_SUPPLY 1 2 3 4 CN4 4Way Right Angle Header SHIELD_L2 SHIELD_R2 RIGHT LEFT 1 2 3 4 5 6 CN6 6Way Right Angle Header 1 2 3 4 5 6 CN7 6Way Right Angle Header RA RTB RC RA RBB RC RA RTB RBB RC LA LTB LC LA LBB LC LA LTB LBB LC VR1:A 5k PushActionLinearPot VR1:B 5k PushActionLinearPot VR2:A 5k PushActionLinearPot C10 680nF63V Met. Polyester VR2:B 5k PushActionLinearPot C18 680nF63V Met. Polyester GUARD R L 1 2 3 4 5 CN8 5Way Straight Header 1 2 3 4 CN10 4Way Straight Header LK37 24AWG LK38 24AWG LK39 24AWG RR LL LK40 24AWG LK1 24AWG 1 2 3 4 5 6 7 8 CN5 8Way Right Angle Header R22 1K1 1/8WMetalFilm R21 1K1 1/8WMetalFilm R25 2K2 1/8WMetalFilm R26 2K2 1/8WMetalFilm R24 2K2 1/8WMetalFilm R23 2K2 1/8WMetalFilm R20 1K1 1/8WMetalFilm R18 1K1 1/8WMetalFilm 1 2 3 4 5 6 1 2 3 4 5 CA1 SeeAP20044/1 6Wayto5Way Screened Audiocable 1 2 3 4 5 6 1 2 3 4 CA2 SeeAP20043/1 6Wayto4Way Screened Audiocable To enhance viewing, please print to A310 Cambridge Audio Azur 740A Amplifier AP19784/3 Front Panel Circuit Diagram (Microcontroller R33 and R36 (10k) to 47k 60