Ampeg_PB250a_Portabass_Preamp_Schematic电路图.pdf

《Ampeg_PB250a_Portabass_Preamp_Schematic电路图.pdf》由会员分享，可在线阅读，更多相关《Ampeg_PB250a_Portabass_Preamp_Schematic电路图.pdf（2页珍藏版）》请在收音机爱好者资料库上搜索。

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: Thu Jul 25, 2002 0 7-22-02 1 RLB R36 WAS 820 OHMS; Q1 WAS MPS-A13 1 7-25-02 CONTROL ISSUE N00

4、910 C of Drawing Title: Drawing Number: NONE 2 Ecr(s)/Ecn(s) First Used On: ST. LOUIS MUSIC, INC Date: 8-21-01 11880 Borman Drive, St. Louis, MO 63146 Chgd By Appvd by F PB250a 07S592-XX 2 BASS PREAMP Date 4 3 DCBA 4 3 2 NOTES: THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. CAUTION: TO A

5、VOID 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, 50

6、V-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 Signatures: Checked: Drawn: Sheet Class Code: THE INFORMATION CONTAINED ON THIS DRAWING IS

7、PROPRIETARY TO Drawing Size: Drawing Type: Schematic Released: REVDateDESCRIPTION E Tolerance: Plot Date: Plot Time: Thu Jul 25, 2002 0 7-22-02 1 RLB R36 WAS 820 OHMS; Q1 WAS MPS-A13 1 7-25-02 CONTROL ISSUE N00910 C of Drawing Title: Drawing Number: NONE 2 Ecr(s)/Ecn(s) First Used On: ST. LOUIS MUSI

8、C, INC Date: 8-21-01 11880 Borman Drive, St. Louis, MO 63146 Chgd By Appvd by F PB250a 07S592-XX 2 BASS PREAMP Date 4 3 .1 C3 1 R66 C9 .047 C32 .047 R63 R6 220 10 C6 35V 100 pF C1 OP275GP R2 4.7K C4 10 35V 1N914 D1 75V PIV C10 .22 R36 1K R45 10K C15 1 2 3 1 U2:A TLO-72 R14 100K 2N5210 Q1 1.5K R22 R2

9、3 1.5K D5 RED O I C SW1:B 1N914 D4 75V PIV .0047 C18 100V .01 100V C17 R12 15K 100 pF C20 200V 2 3 1 U3:A TLO-72 R33 1M 1 C14 R26 2.2K CW 50K L P3 100V C26 .0022 100K R40 O I C SW3:A O I C SW3:B CW 50K L P4 2 3 1 U4:A TLO-72 .022 C24 1M R34 .022 C23 CW 50K L P5 6 5 7 U4:B TLO-72 6 5 7 U5:B TLO-72 R4

10、2 15K 1N914 D7 75V PIV C35 35V 56 pF C5 200V R65 470K R8 C8 100V .022 uF R3 220 R9 4.7K R1 22K OP275GP CW 20K RA P1 33K R21 15K R19 2N5087 Q2 R15 47K C11 .047 100V O I C SW1:A R30 100K .047 C21 100V R35 1M 1.5K R37 C29 100 pF 200V 2.2K R38 1 2 3 4 J5 .047 C16 R67 Q6 D11 R11 68K 680 R17 C7 10 35V R4

11、1.5K R10 22K 470K R28 2.2K R39 R62 4.7K R25 220K R24 1M1N914 D2 75V PIV .01 100V C13 C12 50V .22 R20 33K R18 1K 10K R13 1.5K R27 .01 100V C19 .1 C22 O I C SW2:A CW 50K L P2 1N914 D3 75V PIV R41 100K .015 C28 1N914 D6 75V PIV 10 35V C2 R5 100 R7 10K RING_SW TIP_SW SLEEVE TIP RING J1 MPS-A13 Q3 R31 10

12、K D12 BLUE 6 5 7 U2:B TLO-72 4.7K R16 O I C SW4:B O I C SW4:A 100K R29 C25 .0022 100V O I C SW2:B R32 1M 6 5 7 TLO-72 U3:B 220 pF 100V C27 RING_SW TIP_SW SLEEVE TIP RING J2 RadioFans.CN 收音机爱 好者资料库 DCBA 4 3 2 NOTES: THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. CAUTION: TO AVOID RISK OF

13、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)

14、 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 Signatures: Checked: Drawn: Sheet Class Code: THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY T

15、O Drawing Size: Drawing Type: Schematic Released: REVDateDESCRIPTION E Tolerance: Plot Date: Plot Time: Thu Jul 25, 2002 0 7-22-02 2 RLB R36 WAS 820 OHMS; Q1 WAS MPS-A13 1 7-25-02 CONTROL ISSUE N00910 C of Drawing Title: Drawing Number: NONE 2 Ecr(s)/Ecn(s) First Used On: ST. LOUIS MUSIC, INC Date:

16、8-21-01 11880 Borman Drive, St. Louis, MO 63146 Chgd By Appvd by F PB250a 07S592-XX 2 BASS PREAMP Date 4 3 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. DISCONN

17、ECT 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

18、 PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND THAT EXPLAINED IN THE OPERATING INSTRUCTIONS. DCBA 1 FE 1 Signatures: Checked: Drawn: Sheet Class Code: THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO Drawing Size: Drawing Type: Schematic Released: REVDateDESCRIPTION E Tolerance: Plot Dat

19、e: Plot Time: Thu Jul 25, 2002 0 7-22-02 2 RLB R36 WAS 820 OHMS; Q1 WAS MPS-A13 1 7-25-02 CONTROL ISSUE N00910 C of Drawing Title: Drawing Number: NONE 2 Ecr(s)/Ecn(s) First Used On: ST. LOUIS MUSIC, INC Date: 8-21-01 11880 Borman Drive, St. Louis, MO 63146 Chgd By Appvd by F PB250a 07S592-XX 2 BASS

20、 PREAMP Date 4 3 4 CW P6 50K L 2.2K R46 CW 100K A P7 R55 YEL D10 220K R58 C31 50V 2.2 uF R49 2.2K 2.2K R51 1N914 D9 75V PIV R60 47K .1 50V C36 2.2K R44 2.2K R59 2 3 1 U5:A TLO-72 100K R57 R54 1K G S D Q4 R64 47K 1 2 3 4 5 6 7 8 9 10 11 J3 1 2 3 4 5 6 7 J4 R53 1K R50 100K R43 2.2K 1 C33 50V 1N914 D8 75V PIV 220K R61 10 C34 100V 50V .1 C37 .1 50V C38 R48 47K R52 1K 6 5 7 U6:B TLO-72 C30 50V 2.2 uF R47 2.2K R56 2N5210 Q5 2 3 1 TLO-72 U6:A RadioFans.CN 收音机爱 好者资料库