Electro-Harmonix EH7875-2A 16 Second Digital Delay 电路图.pdf

《Electro-Harmonix EH7875-2A 16 Second Digital Delay 电路图.pdf》由会员分享，可在线阅读，更多相关《Electro-Harmonix EH7875-2A 16 Second Digital Delay 电路图.pdf（2页珍藏版）》请在收音机爱好者资料库上搜索。

1、Name:Manufacturer / Designer:Revision:Model # + + - + + - + - + + + - + + + + - + + + 6 5 7 + - + - IC1 - TL082 IC2 - 4558 Q1, Q4 - 2N5087 Q2, Q3 - 2N4859A 0.1uf 1k 150k IC1a 10uf 10k 6 7 5 100k Q1 1M Q2 1M 0.047uf 100k IC1b s d s d g g Q3 10k Lin Blend 100k 10k 100k 10k Lin Q4 1uf 0.047uf 150 +5v +

2、5v 1 0.0068uf 47k 47k IC2b 10uf 1M5 0.47uf 12k 47pf 10uf 47k 47k47k 10uf 7 B A 27k 10uf IC9b D1 D2 16 11 13 4 1415 9 18 1 3 2 2 3 5 6 7 IC9 - 571 D3, D4 - 6.8v Zener D1, D2 - Signal Diode ? 47p IC11aTo A/D Input Input Direct Output Output B/O RO 16 Second Digital DelayElectro-HarmonixEH7875-2A IC11,

3、 IC4 - Unmarked Dual Op-Amp, probably a 4558 5 -10v +10v FCK 2 8 53 7 61 5 -10v +10v FCK IC7 D3 D4 2 8 53 7 61 0.47uf 47k 6 0.033uf 8k28k2IC4a 10uf 12k 2M7 tant tant 47pf 10ufIC4b IC9a A IC8 47pf 10k0.0068uf 680pf 10k 1 3 2 3 7 1 5 8 From D/A Out IC7, IC8 - Unmarked ? 6 7 5 IC2a 10k 1 / 3k9 3k9 100k

4、 12/9/95RadioFans.CN 收音机爱 好者资料库 Name:Manufacturer / Designer:Revision:Model # + + + -+ -+ + + B + - + + + + C C 3 1 2 + - 16 Second Digital DelayElectro-HarmonixEH7875-2A 2 / Red Black White 100V 120V 0V Y Y R R W +10v 7805 7815 7812 +12v 4 2 1 8 11 -15v -15v +5v 33uf 100uf 35v 100uf 35v 10uf 5.1v A

5、 470uf 10v 470uf10uf 33uf 47 XA0140 D 10k lin CLIX Click Select 100k 100k 100k 0.068uf 2N5088 100k 22k 22k 0.0022uf 10M 4k7 12k Click Out 12 IC10a +5v RO +5v Slow Reciac Rev 30k 15k 7k5 3k74 # # # # Bypass # # B/O 10k 14 109 3 13F/S REV 22uf22uf22uf IC12c 1k IC12d 680 Foot Switch 1k87 1k3782k 0.01uf

6、 IC10b 1uf 680 +5v 1uf 10k 1uf A2SCK 203 2 1 16 15 11 6 clk rd cs 10D.gnd wrvcc in+ vnff/2 in- 311 1086 6 5 7 ADC0804 131214 4 8 7 9 +5v +5v +5v 4k7 1k IC12b msb A.gnd 10v REC IC12a 7 13 Resistors marked # are 1% types. IC10 - LM358 IC12 - unmarked, CD4049 perhaps? +12v to pin 8 on IC1, IC2, IC4, IC

7、5, IC6, IC10, IC11, IC43, & IC44 pin 13 on IC9, & IC3 +10v to pin 5 on IC7, & IC8 +5v to pin 20 on the ADC0804 a pin # I coudnt read on IC12 pin 14 on IC13, IC14, & IC21 through IC24 pin 16 on IC15 through IC18 pin 3 on IC19 pin 8 on IC20, & IC30 through IC41 pin 20 on IC27, & IC42 pin 5 on IC28 pin 12 on IC29, & IC3 pin 7 on IC44 pin 9 on IC19 on IC42 -10v to pins 1 & 6 on IC7, & IC8 -15v to pin 4 on IC1 through IC4, IC10, IC11, IC20, IC43, & IC44 pin 17 All diodes were unmarked. 12/9/95RadioFans.CN 收音机爱 好者资料库