Ampeg_pwa_preamp_07s519 电路图 维修原理图.pdf

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1、DCBA 4 3 2 NOTES: THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. CAUTION: TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE TOUCHING INTERNAL PARTS. 1) CAUTION: SHOCK HAZARD!

2、2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL. CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL. 3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE AND 10 MEGOHM DIGITAL VOLTMETER. SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND THAT EXPLAINED IN THE OPERATING INSTRUCTIONS. DCBA 1 FE 1 S

3、ignatures: Checked: Drawn: Sheet Class Code: THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO Drawing Size: Drawing Type: Schematic Released: REVDateDESCRIPTION E Tolerance: Plot Date: Plot Time: Wed Aug 20, 2003 0 8-21-03 1 RLB CONTROL ISSUE C of Drawing Title: Drawing Number: NONE 1 Ecr

4、(s)/Ecn(s) First Used On: ST. LOUIS MUSIC, INC Date: 5-8-03 11880 Borman Drive, St. Louis, MO 63146 Chgd By Appvd by F 07S519 2 PWA - PREAMP Date 4 3 235V 8V 0.4V +14V (NORMAL) -0.6V (FAULT) ULTRA LOW 240V ULTRA HIGH 240V 100V D5 1N914 75V PIV R1 22K 1/4W 5per 15mV 1N4002TR D6 100V PIV 22 35V C2 1.5

5、K 1/4W 5per R8 4.7K 1/4W 5per R6 4700 25V C18 100K 1/4W 5per R35 100K 1/4W 5per R5 1 2 3 IC1:A NE5532 0.9V R25 560 1/2W 5per +14V (OPERATE) -14V (STANDBY) CW 1M A P1 GAIN 1.5K 1/4W 5per R29 1.5K 1/4W 5per R28 R38 100 1/2W 5per 100K 1/4W 5per R31 C11 .1 400V 7V .01 C21 100V C23 470 pF 200V 220K 1/4W

6、5per R48 470K 1/4W 5per R40 .1 C16 100V 100K 1/4W 5per R32 .0047 C27 100V C17 .033 100V 10 35V C121.5K 1/4W 5per R44 C5 .1 400V 470 1/4W 5per R36 .1 C6 250V 220K 1/2W 5per R16 4.7K 1/4W 5per R15 C26 .68 250V 1 2 3 4 5 J4 1N4002TR 100V PIV D7 D4 75V PIV 1N914 5 9 7 6 8 9-PIN V1:B 100K 1/2W 1per R7 C1

7、 10 400V 1M 1/4W 5per R34 C14 2.2 50V 56 pF C4 200V R11 100K 1/4W 5per R10 1M 1/4W 5per 100K 1/2W 1per R27 4 9 3 1 2 V1:A 9-PIN C25 .047 100V 470K 1/4W 5per R39 470K 1/4W 5per R41 .047 C24 100V 470K 1/4W 5per R46 .001 C20 100V 22K 1/4W 5per R37 .033 C19 100V 2.2K 1/4W 5per R45 C15 .15 100V 100K 1/2W

8、 1per R43 470K 1/4W 5per R47 3100mH 4CMN 2300mH 1800mH TAPPED L1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 J3 07S519-12 DRAWING REPLACES 07S519-11 2 1 J6 2 1 J5 R18 220K 1/4W 5per 3.3M 1/4W 5per R4 C3 .1 400V R3 100K 1/4W 5per 220 1/4W 5per R49 D2 1N914 75V PIV 6 5 7 IC1:B NE5532 R9 100K 1/4W 5per 220K 1/4W

9、5per R19 C10 .033 50V R20 330K 1/4W 5per 1M 1/4W 5per R26 R21 220K 1/4W 5per ASSY P/N 07-519-12 R30 100K 1/4W 5per CW TREBLE P4 1M A .68 C13 250V 1M 1/4W 5per R33 CW 50K L P5 MASTER 8.2K 1/4W 5per R13 100K 1/4W 5per R12220K 1/4W 5per R14 470K 1/4W 5per R24 J2 -15dB INPUT J1 0dB INPUT 220 1/4W 5per R

10、50 GREEN RED D1 BICOLOR D3 75V PIV 1N914 R2 470 1/4W 5per 7 O 8 C 9 I 12 I 11 C 10 O SW1:B C7 470 pF 200V C9 .1 100V C8 .0047 100V R22 3.3M 1/4W 5per 3.3M 1/4W 5per R23 CW 4 3 2 CCW CMN S2 FREQUENCY 470K 1/4W 5per R42 .1 C22 100V 75 9 6 8 9-PIN V2:B CW P2 1M A BASS CW P3 50K L MID 470K 1/4W 5per R17 24 9 1 3 V2:A 9-PIN 4) VOLTAGES IN RECTANGLES ARE RMSSIGNAL, VOLTAGES WITH 15mV IN. OTHER VOLTAGES ARE D.C. IN CONDITIONS STATED. 5) CIRCUIT GROUND LED GROUND CHASSIS GROUND 1N4002TR 100V PIV D8 1N4002TR 100V PIV D9 1 TO 2 TC 3 TI 6 TI 5 TC 4 TO SW1:A 收音机爱好者资料库 Ra d i o Fa n s .CN