Madamp_A15 维修电路原理图.pdf

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1、Page 1 of 2Rev 1.01 2 Channel American Preamp 19.11.2008 MADAMP A15Mk2 R3 120K R4 1K5 C2 1uF C4 330pF C5 4,7nF VR2 220K lin B+ Clean V1a ECC83 VR5 220K lin VR6 1M log VR7 22K lin Volume Treble Bass Mid Treble VR8 1M log High Gain Input J1 R1 1M R2 33K SW1 Fat + C3 47uF 6 7 8 1 2 3 C1 10nF VR3 470K l

2、og Volume R7 1K5 + C6 47uF R9 47K +R10 5K6 C8 47uF Power- amp R5 220K VR1 220K log Bass R6 10K V1b ECC83 237V 154V 1,2V 145V 1,2V 245V R8 56K C7 22nF SW2a Channel Switch + + C18 470pF C19 22nF C20 22nF R29 5K6 R36 3K9 R35 470k R11 470k R17 2M2 R18 680k C12 1nF R19 470k C13 22nF C15 22nF R20 1K5 R32

3、1K5 R27 39k R21 100K R25 33K R33 220K C10 47uF C17 47uF R22 470K R30 220K R28 470K C14 1uF C16 1uF R34 47K SW2b Channel Switch C11 2,2nF VR4 1M log Gain R24 1M R23 220K SW3b Boost 6 7 8 6 7 8 1 2 3 C21 22nF R15 470K R16 470K SW3a Boost R26 68K 240V 156V 1,2V 228V 3V 110V 1V R31 470K V2a ECC83 V2b EC

4、C83 V3a ECC83 1 2 3 V3b ECC83 R14 100K R12 1M R13 1MC9 47nF 116V 123V + + COPYRIGHT MADAMP / Martin Adams 2008 All Voltages measured with respect to ground (except heater voltage) at No-Load Conditions, Voltages may vary +/- 5% RadioFans.CN 收音机爱 好者资料库 Page 2 of 2Rev 1.01 Power Supply & American 15W

5、Power Amp 19.11.2008 MADAMP A15Mk2 8 Ohm 16 Ohm TR2 + C28 100uF R59 100 R45 220K R55 1k R56 1k + C29 100uF + R49 470 R50 470 R48 3K9 V5 6V6 V6 6V6 C26 47uF BR1 TR1 R57 680 F2 200mA 230V/50Hz F1 500mA SW6 Power R46 220K SW5 Standby C32 100nF Draht 1/18 4/15 J5 J6 R40 1M R41 1M R42 680 R43 6K8 V4 ECC8

6、3 R38 82K R39 100K C23 10nF C24 10nF C25 100nF B+ R60 100 R61 100 R58 100K 230V 5 8 3 4 5 8 3 4 6 7 8 1 2 3 R52 1 R51 1 R44 1K5 R47 56K + R62 2k7 C31 47uF C30 47uF R63 5k6 D1 Bias -21 bis -27V 298V 290V 282V 288V 35mV (Pa ca. 10W) -21V 262V 181V 171V 17V 16V 2,8V R53 18k C27 10nF SW4 Smooth VR9 10K

7、lin J6 Center OFF R54 10k + Send Return J2 J3 C22 47nF R37 1M 3 7 16 18 10 12 15 13 COPYRIGHT MADAMP / Martin Adams 2008 R64 220k + C33 22uF R65 56k 53V 6,3V AC 12 13 6/7 3/16 4 Ohm J4 All Voltages measured with respect to ground (except heater voltage) at No-Load Conditions, Voltages may vary +/- 5

8、% RadioFans.CN 收音机爱 好者资料库 + C31 Page 1 of 1Rev 1.01 2 Channel American 15W Amplifier - Layout Plan 19.11.2008 MADAMP A15Mk2 3 7 10 12 16 18 Power SW6Standby SW5Input 8 Ohm J7 Power Plug Socket R1 R59 + C28 BR1 + - V1 V2 VR2 VR3 VR5VR6VR7VR8 TR1 F1 Fuse C32 F2 Fuse VR4 V5 16 Ohm 1 18 TR2 R48 R58 + C2

9、6 + C29 ReturnSend V3V4 V6 VR1 Bass Fat SW1 TrebleVolumeChannelGain+BassMidTrebleVolume VR9 Bias 13 15 D1 + C30 R62 R61 R60 1 1 1 1 1 1 R45 C9 R46 R50R49 R55R56 AB CD R52 R51 C22 R54 R53 C27 Smooth SW4 C2 C3 + R4 C1 C8 + R2 R25 E E R3R8 C7 + C6 R7 R9 R5 R6 C5 R16 R17 R15 C11 R18 C4 C14 R20 C12 R26 R

10、24 R27 R19 R22 R21 C13 R23 C15 R29 R28 R10 C16 R32 R11 C21 C20 C18 C19 R34 C23 C24 R38R39 R36 R44 R43 R47 R13 R14 R31 R41 R42 R40 AB C C25 R12 R30 R33 D F F COPYRIGHT MADAMP / Martin Adams 2008 R64 R63 R65 + C33 R35 G G 3 16 4 15 13 6 7 12 + C10 C17 + J1 R37 J3J2 4 Ohm J6J5J4 R57 Red/WhiteHeating Gr

11、eyShielded YellowPower RedBias White Black Blue Green Signal Cathode Plate Ground RadioFans.CN 收音机爱 好者资料库 9 254 432 2095 50 4 4 85 70 160 60 25 3,5 3,5 23 4 4 23 4 4 80 120 70 15 9 4 44 45 4 44 5050 9 4 4 30 20 3 90 3 50 65 3,5 70 3,5 80 60 3,5 110 3,5 3,5 100 Top of Chassis rear front Seite 1 von 1Rev 1.01 2 Channel American 15W Amplifier - Bohrplan 19.11.2008 MADAMP A15Mk2 15 1515 23 25 3,5 3,5 80 4 4 All numbers in mm 4 4 7070 23 35 12575 3 3 130 60 10 COPYRIGHT MADAMP / Martin Adams 2008 RadioFans.CN 收音机爱 好者资料库