Ampeg ba 115a ba ss amp

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D C B A 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) 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. D C B A 1 F E 1 Signatures: Checked:Drawn: SheetClass Code: THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO Drawing Size: Drawing Type: Schematic Tolerance: Released:REV Date DESCRIPTION E 0 7/01/99 2- OK CONTROL ISSUE SWAPPED J21 PINS 1 & 2, COONECTED J21 TO HEADPH GS TO DETACH FROM MAIN GND 1 0 7/28/99 7/01/99 CONTROL ISSUE ECR00047 R990512-01 N00062 C ofDrawing Title: Drawing Number:NONE 2Ecr(s)/Ecn(s) First Used On: ST. LOUIS MUSIC, INC Date: 1/14/99 - 11880 Borman Drive, St. Louis, MO 63146 Chgd By Appvd by- FBA115a 07S103-XX 2 SCHEMATIC -BASS AMP Date 4 3 D C B A 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) 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. D C B A 1 F E 1 Signatures: Checked:Drawn: SheetClass Code: THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO Drawing Size: Drawing Type: Schematic Tolerance: Released:REV Date DESCRIPTION E 0 7/01/99 2- OK CONTROL ISSUE SWAPPED J21 PINS 1 & 2, COONECTED J21 TO HEADPH GS TO DETACH FROM MAIN GND 1 0 7/28/99 7/01/99 CONTROL ISSUE ECR00047 R990512-01 N00062 C ofDrawing Title: Drawing Number:NONE 2Ecr(s)/Ecn(s) First Used On: ST. LOUIS MUSIC, INC Date: 1/14/99 - 11880 Borman Drive, St. Louis, MO 63146 Chgd By Appvd by- FBA115a 07S103-XX 2 SCHEMATIC -BASS AMP Date 4 3 1K R18 22K R21 C15 .022 uF 50V NOTE: BIAS SETTING AS FOLLOWS; SET AP1 BIAS ADJUST CONTROL FOR 5mV ACROSS R61 WITH NO SIGNAL APPLIED, NO LOAD. NOTE: R11 & C7 DESIGNATORS ARE NOT USED. R13 100K 100KR12 L RJ3 22 uFC5 50V 22K R16 22K R15 C4 22 uF 50V 270R3 270R2 R10 22K 22K R17 P4 50K LINP5 50K LIN 23 1 U1:A TLO-72 65 7 TLO-72U1:B CW CW P3 50K LIN U2:A TLO-72 47K R24 C16 .0022 uF 100V C8 56 pF 200V PAGE_NEXT CCW CW P2 20K RA R20 100K TLO-72 U2:B 3.3K 1/2WR7 R14 100K 10uFC9 35V D3 1N914 1N914D5 +40V -40V VTL-5C7 R8 1K D2 1N914 R23 47K R25 10K 33 pFC12 200V NE5532 U3:A C11 10uF 35V S D G Q6J112 1N914 D4 R4 1K R591M 50V 1 uFC44 R6 3.3K 1/2W R22 1K -16V 820 1WR5 33K R19 33 pFC10 200V C17 .1 uF 100V R28 3.3 1W +40V 47 R33 D7 1N4744 ZENER Q4 MJE-340 +16V R34 220 1K R50 10uFC31 35V R41 220 D6 1N4744 ZENER Q2 ASSY P/N 07-103-02 C2 .047 uF 100V 13 2 XLR M H J5 R26 47 330 pFC13 100V U3:B NE5532 R9 220 SLVE_SWSLEEVE TIP_SW RINGRING_SW TIP J4 T/R/S C20 1 uF 50V D8 1N4744 ZENER R49 47 SEE NOTE. MPS-A06 Q3 R44 4.7K 1K R43 R35 220 Q1 MJE-350 -16V -40V 220 R31 1K R42 500 AP1 CW 12 J21 .1 3W R61 -40V D9 1N4744 ZENER Q5 IRFP-140R