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SERVICE MANUAL

000

HIGH EFFICIENCY STEREO POWER AMPLIFIER

U.S.A.

Yorkville Sound Inc.

4625 Witmer Industrial Estate

Niagara Falls, New York

14305 USA

Voice: (716) 297-2920

Fax: (716) 297-3689

WORLD HEADQUARTERS

CANADA

Yorkville Sound

550 Granite Court
Pickering, Ontario

L1W-3Y8 CANADA

Voice: (905) 837-8481

Fax: (905) 837-8746

Quality and Innovation Since 1963

Printed in Canada

VERSION 1.50 October 1998

Содержание AudioPro AP3000

Страница 1: ...er Industrial Estate Niagara Falls New York 14305 USA Voice 716 297 2920 Fax 716 297 3689 WORLD HEADQUARTERS CANADA Yorkville Sound 550 Granite Court Pickering Ontario L1W 3Y8 CANADA Voice 905 837 8481 Fax 905 837 8746 Quality and Innovation Since 1963 Printed in Canada VERSION 1 50 October 1998 ...

Страница 2: ...or circuit is connected through D1 and D2 to the output of U1 The bases of Q2 and Q4 are connected to the CLP reference voltage and when the peak output voltage of U1 Vp is enough to forward bias the transister junctions Q2 or Q4 will trigger the clip led circuit Q5 and eliminate the clip LED INSTRUCTIONS PERTAINING TO A RISK OF FIRE ELECTRIC SHOCK OR INJURY TO PERSONS CAUTION TO REDUCE THE RISK O...

Страница 3: ...current amp board M1002 DC offset on the amplifier s output is corrected by operational amplifier U2 The DC offset forms a current through R54 R14 and is blocked by C5 giving a DC offset correction gain of 1 The activity L E D function is a simple charge pump circuit with a transistor that redirects a constant current path through the activity L E D 3 SHUTDOWN CIRCUIT The last circuit on board M10...

Страница 4: ... 5V across R12 Q1 will turn off slightly causing Q5 to increase its source current The circuit reaches a point of equilibrium with approximately 0 5V across R12 Because all output devices are not identical and base emitter voltages vary some adjustment must be available to slightly adjust the 0 5V across R12 This is accomplished with RT1 RT1 causes Q1 to turn on slightly more or less resulting in ...

Страница 5: ...y using an oscilloscope to measure differentially across R52 and R53 The conditions of the measurement are contained on the diagram During current limit when Q9 turns on it reduces the voltage across R42 R42 is in series with a 16 volt zener ZD7 and is also in parallel with the junction of Q8 Q8 is normally saturated by the current that flows through R20 ZD7 R42 and R22 When Q9 reduces the voltage...

Страница 6: ...current from the base of Q34 The maximum fan voltage is 20 5 VDC ZD14 and R120 R121 and R122 provide a current limiting function Figure 4 shows the current throught these resistors when there is 12VDC across the fan Thermal Shutdown Circuit Test point 7 in the fan circuit is the measuring point for the shutdown voltage As the temperature sensing thermistors that control the fan circuit heat up the...

Страница 7: ...protect LED staying on or sampling on and off 11 SPECIFICATIONS POWER All values are in WATTS at 1KHz except FTC 20Hz 20KHz Measurements made with regulated 120 VAC sine wave at line cord All values are rounded down to the nearest 25 watts BURST AVERAGE Measured as a 2 cycle burst at 1KHz 8 1 duty Continuous measurements may require line currents 15 Amps ONE CHANNEL DRIVEN WATTS LOAD CONT AVG BURS...

Страница 8: ...P TRANS T R 2 8682 4 TEFLON WASHER 125ID 281OD 031 1 4868 1 4W 36K 5 T R RES 2 6854 2N6517 TO92 NPN TRANS 2 3857 VELCRO HOOK 0 5 4834 1 4W 47K 5 T R RES 11 5105 MPSA13 TO92 NPN DARLINGTONT R 1 8498 6 32 X 3 8 STEEL PEM STUD 4 4836 1 4W 68K 5 T R RES 9 5106 MPSA63 TO92 PNP DARLINGTONT R 3 8499 6 32X1 STEEL PEM STUD 7 4772 1 4W 82K5 1 T R RES 8 5123 NJM431L TO92 SHUNT REG T R2V 4 3795 8 GROUND LUG Z...

Страница 9: ...K2 0 5W R103 1K R105 EY2 1K R104 249R 1 R35 100u 25v C48 100u 25v C49 47K R70A 10K R130 EY5 22K R68A NJM431L 3 2 1 22K R67B 100R R57A 1K2 0 5W R124 D46 47K R68B EY17 16v 10u C16 16v 10u C15 330u 16v C29A 270R R125 330u 16v C29B CW L_LEVEL 25A 10K P1 100n C26 EY8 EY9 CW R_LEVEL 25A 10K P2 1N4004 D48 47K R28 BC550 Q9 BC550 Q7 47K R27 3K R29 3K R26 1K R24 7K5 R22 17K8 1 R25 1 2 33078 U1 6 5 7 BC560 Q...

Страница 10: ...9A 220R R40A D14A D13A D15A D16A 22n 16v C20B 7K5 R39A 7K5 R41A 2N5551 Q12A 2N5401 Q13A 7K5 R38A 7K5 R42A 1K R44A 1K R45A 4K7 R46A 1K5 R47A 1K5 R48A 470R R49A 4K7 R50A 1K5 R51A 1K5 R52A 470R R53A 3K R43A 17K8 1 R56A BC560 Q14A BC550 Q17A 100R R64A 22u 10v C21A 22u 10v C24A D17A D18A BF872 Q15A BF871 Q16A D19A D20A D21A 10K 1 R55A 47K R54A 10p 200v C23A D23A D22A 4u7 10v C26A 39R R58A 39R R63A 4u7 ...

Страница 11: ... R6 NO_PART D7 4148 Q6 Q1 MTW14P20 J21 R49A R1 NO_PART R49B R1 NO_PART C5 22U 10V Q5 Q2 MTW10N40E J15 Q15 YS 6900 Q17 YS 6900 Q25 YS 6927 TAB5 R78 470K Q19 YS 6900 MC1 PART FUNCTION J18 J17 R12 39R Q29 MBS4992 L 1 4uH Q34 MPSA42 R40 1K _WC7 C14 220N 250V J7 J8 J6 J5 D20 MR854 J10 R35A 13K R36 68K R70 18K R71 R6 NO_PART J2 R48 39R R68 R4 0 5W 10K RV1 100K J11 R40A 13K Q32 BC550 R69 R4 0 5W 10K R34 ...

Страница 12: ...FUNCTION 1 _MW4 R11 249R TP9 TP4 TP3 TP2 TP1 NO NC C RE1 AROMAT_RELAY 3700 24V_COIL C43 220N 250V C42 220N 250V P2 25A10K PT 4400 P1 25A10K PT 4400 R99 R6 0 5W 150R R98 R6 0 5W 150R R124 R13 0 5W 1K2 E B Q11 PART FUNCTION BF872 D48 1N4004 ZD17 ZD1 20V C31 27P 1 _MW3 FUNCTION C32 27P Q28 A63 Q29 A13 Q38 Q5 2N5401 Q36 Q6 A06 Q10 A63 Q5 A63 C17 47U 10V C9 47U 10V ZD2 4V7 ZD1 4V7 E B Q16B Q2 BF871 Q8 ...

Страница 13: ...4M7 R34 470R R18 1K5 R36 1K5 C7 470N C9 150N C8 47N C6 100N C5 68N C15 68N C16 100N C18 47N C19 150N C17 470N C10 6N8 C20 6N8 J17 J18 JB3 UNBAL_IN_B C1 470P C2 470P C3 100P C4 100P C14 100P C13 100P C12 470P C11 470P C23 100N C24 100N C21 100N C22 100N J7 LINEWIDTH GAUGE TP1 TP2 B_BAL_INPUT PART PT 3660 J6 J8 JB2 UNBAL_IN_A BUT2 GREY_BUTTON J5 J3 J4 J1 J11 J13 J14 J15 J16 MC1 FUNCTION S1 3436 BASS...

Страница 14: ...6 PC 4529 AP 3000 M1013 PCB_DATABASE_HISTORY EY2 AC WHITE J25 J24 J21 J23 EY3 X F BLACK 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 DESCRIPTION OF CHANGE VER DATE MODEL S D D D D D D D D D D D D D D D D D NOV 24 95 SEP 20 94 MAY 26 94 V V V V V V V V V V V V V V V V V 2 30 2 21 2 20 N N N N N N N N N N N N N N N N N PC 49 PC 4576 PC 4609 AP 3400 M1013A PCB_DATABASE_HISTORY R122 2R2_1 2W R12...

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