Gemini-PMX20-mix-sch 电路图 维修手册.pdf

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1、Page 1 SERVICE MANUAL PMX-20 Stereo Preamp Mixer CONTENTS: Connections & Operations:.Page 2-3 Specifications:.Page 3 Parts Lists:.Page 3 PCBs:.Page 4 Schematics.Page 5 Gemini Sound Products Corp. 120 Clover Place P.O. Box 6928 Edison, NJ 08818-6928 732-738-9003 (Phone) 732-738-9006 (Fax) RadioFans.C

2、N 收音机爱 好者资料库 Page 2 10 18 15 13 17 169 11 6 8 12345 7 14 12 RadioFans.CN 收音机爱 好者资料库 Page 3 074-022 074-145 074-104 074-113 074-114 074-107 INTEGRATED CIRCUIT LB1403N INTEGRATED CIRCUIT NJM2068LD INTEGRATED CIRCUIT NJM4558L (M5218AL,BA4558N) INTEGRATED CIRCUIT NJM4556L INTEGRATED CIRCUIT NJM7912FA IN

3、TEGRATED CIRCUIT NJM7812FA IC5 IC1, IC2 IC3 IC4 IC7 IC6 DesignatorsDescriptionPart # ICs Item # 1 2 3 4 5 6 079-027 080-091 072-081 072-035 071-084 RECTIFIER DIODE 1N4002 (1N4003,1N4004) LIGHT EMITTING DIODE (RED) 3.15f SLIDE VR 45mm L=20 FADER 100KB2 SLIDE VR 45mm L=20 CH1/CH2 50KA2 ROTARY VR 16f L

4、=20 50KA2 D7, D8 D1-6 VR3 VR1, VR2 VR4 DesignatorsDescriptionPart # ICs Electrical Parts Item # 1 2 3 4 5 Connections 1. This unit comes supplied with a 15 volt AC adaptor. Plug the male pin of the adaptor into the rear panel POWER JACK (7). Then plug the adaptor into a proper power source. 2. Make

5、sure that the POWER (6) switch is in the off position. The POWER LED (12) will be off. 3. To connect the mixer to your amplifier, use the OUTPUT AMP (1) jacks on the rear panel. 4. On the rear panel are 2 stereo PHONO (3, 5) inputs and 2 stereo LINE (2, 4) inputs. The PHONO (3, 5) inputs will accept

6、 turntable inputs only. A GROUND (8) screw for you to ground your turntables is located on the rear panel. The stereo LINE (2, 4) inputs will accept any line level input like a CD player or a cassette player. 5. Headphones can be plugged into the front panel mounted HEADPHONE (18) jack. Operation 1.

7、 POWER ON: Once you have made all the equipment connections to your mixer, press the POWER (6) switch. The power will turn on and the POWER LED (12) will glow RED. 2. CHANNEL 1: The CHANNEL LEVEL SLIDE (10) allows you to fully adjust the level of the selected source. The PHONO/LINE (9) switch allows

8、 you to select either Line 1 or Phono 1 to play through channel 1. 3. CHANNEL 2: The CHANNEL LEVEL SLIDE (17) allows you to fully adjust the level of the selected source. The PHONO/LINE (16) switch allows you to select either Line 2 or Phono 2 to play through channel 2. 4. CROSSFADER SECTION: The CR

9、OSSFADER (15) allows the mixing of one source into another. The left side of the CROSSFADER (15) is channel 1 and the right side is channel 2. 5. CUE SECTION: By connecting a set of headphones to the HEADPHONE (18) jack, you can monitor either channel 1 or channel 2. Select Channel 1 by moving the C

10、UE SWITCH (14) to the left or Channel 2 by moving the CUE SWITCH (14) to the right. Use the CUE LEVEL (13) control to adjust the headphone volume without effecting the overall mix. 6. DISPLAY: The DISPLAY (11) indicates the MASTER (1) output. Specifications INPUTS: Phono.3mV 47Kohm Line.150 mV 27Koh

11、m OUTPUTS: Amp.0 dB 1V 400ohm Max.10V Peak to Peak GENERAL: Frequency Response.20Hz - 20KHz +/- 2dB Distortion.0.02% S/N Ratio.better than 80dB Headphone Impedance.16ohm Power Source.115V/15V AC 7.5W or 230V/15V AC 7.5W Dimensions.6.5” x 7.5” x 2” (165 x 192 x 53 mm) Weight.2 lbs (1 kg) DescriptionP

12、art # Cabinet Parts and Packing 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Item # Parts Lists 002-202 032-012 023-674 003-110 148-236 002-704 003-712 159-215 159-171 159-216 003-969 146-710 049-205 046-026 003-612 110-166 111-043A 111-046A 110-172A 110-168 PANEL CONTROL COVER BOTTOM KNOB SWI

13、NG (LONG) KNOB ROTARY (B) KNOB INLAY (BLACK) KNOB SLIDE (BIG) HOLDER MIC DUST PROOF CLOTH VR DUST PROOF CLOTH SWING DUST PROOF CLOTH HOLDER LED 3fLED (17mm) GND SCREW PAD FOOT SCREEN SNAP RIVET PAN-HEAD TAPPING SCREW/TWIN SCREW 26(B) FAND-HEAD TAPPING SCREW 36(AB) BAND-HEAD TAPPING SCREW 36(AB) PAN-

14、HEAD TAPPING SCREW/TWIN SCREW 38(AB) PAN-HEAD TAPPING SCREW/WASHER 310(B) 262-037PRINTED CIRCUIT BOARD PC-PMX-5 DescriptionPart # Printed Circuit Boards Item # 1 RadioFans.CN 收音机爱 好者资料库 PCB Page 4 2 3 1 48 IC1A 2068 R1 1K R15 47K R21 8K2 R25 100K R31 180 R35 47 R36 47 C1 822 C5 273 C9 101 C13 221 R2

15、 1K C19 4.7/16 C20 4.7/16 C29 22/16 C30 22/16 C35 47/16 J1 PHONO2 J2 LINE2 6 5 7 IC1B 2068 R3 1K R16 47K R22 8K2 R26 100K R32 180 C2 822 C6 273 C10 101 C21 4.7/16 C36 47/16 R4 1K R5 1K +VCC -VCC C14 221 R6 1K C22 4.7/16 SW1D SW1B SW1C SW1A VR1A 50KA VR1B 50KA R44 5K6 R48 39K R45 5K6 R49 39K VR3A 100

16、KB VR3B 100KB 2 3 1 48 IC2A 2068 R7 1K R17 47K R23 8K2 R27 100K R33 180 R37 47 R38 47 C3 822 C7 273 C11 101 C15 221 R8 1K C23 4.7/16 C24 4.7/16 C31 22/16 C32 22/16 C37 47/16 J3 PHONO1 J4 LINE1 6 5 7 IC2B 2068 R9 1K R18 47K R24 8K2 R28 100K R34 180 C4 822 C8 273 C12 101 C25 4.7/16 C38 47/16 R10 1K R1

17、1 1K +VCC -VCC C16 221 R12 1K C26 4.7/16 SW2C SW2D SW2A SW2B VR2A 50KA VR2B 50KA R46 5K6 R50 39K R47 5K6 R51 39K 2 3 1 48 IC3A 4558 6 5 7 IC3B 4558 C41 10/16 C42 10/16 C33 22/16 C34 22/16 R39 47 R40 47 -VCC +VCC J5 MASTER C43 10/16 C44 10/16 R52 430 R19 47K R20 47K R53 430 SW3ASW3B VR4A 50KA VR4B 50

18、KA C27 4.7/16 C28 4.7/16 R54 100K 2 3 1 48 IC4A 4556 6 5 7 IC4B 4556 R55 100K R56 10 R57 10 C46 220/16 C47 220/16 R41 47 R42 47 C17 472 C18 472 J6 D1 LED D2 LED D3 LED D4 LED D5 LED R43 47 R58 10K R59 4K3C45 10/16 R29 62K R30 62K +VCC D7 1N4002 D8 1N4002 C48 470/25 C49 470/25 -VCC +VCC -VCC C50 10P

19、C51 10P +VCC -VCC CH2 CH1 PH1/LN1 PH2/LN2 CH1/CH2 CUE CUE X-FADER POWER D6 LED R60 750 IC6 7812 IC7 7912 C52 1/50 C53 1/50 R61 240K R62 240K X1 R63 3K9 R13 330 R64 3K9 R14 330 C39 47/16 C40 47/16 1 9 2 6 3 4 7 8 5 IC5 LB1403N Page 5 Schematic Page 4 Worldwide Headquarters 120 Clover Place, Edison, N

20、J 08837 USA Tel: (732) 738-9003 Fax: (732) 738-9006 France G.S.L. France 11, Avenue Leon Harmel, Z.I. Antony, 92160 Antony, France Tel: + 33 (0) 1 55 59 04 70 Fax: + 33 (0) 1 55 59 04 80 Germany Gemini Sound Products GmbH Ottostrasse 6, 85757 Karlsfeld, Germany Tel: 08131 - 39171-0 Fax: 08131 - 3917

21、1-9 UK Gemini Sound Products Unit C4 Hazleton Industrial Estate, Waterlooville, UK P08 9JU Tel: 087 087 00880 Fax: 087 087 00990 Spain Gemini Sound Products S.A. Rosello, 516, Barcelona, Spain, 08026 Tel: 349-3435-0814 Fax: 3493-347-6961 Gemini Sound Products Corp. 2002 All Rights Reserved Parts of

22、the design of this product may be protected by worldwide patents. Information in this manual is subject to change without notice and does not represent a commitment on the part of the vendor. Gemini Sound Products Corp. shall not be liable for any loss or damage whatsoever arising from the use of in

23、formation or any error contained in this manual. No part of this manual may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, electrical, mechanical, optical, chemical, including photocopying and recording, for any purpose without the express writte

24、n permission of Gemini Sound Products Corp. It is recommended that all maintenance and service on this product is performed by Gemini Sound Products Corp. or its authorized agents. Gemini Sound Products Corp. will not accept liability for loss or damage caused by maintenance or repair performed by unauthorized personnel. In the USA: If you experience problems with this unit, call 1-732-738-9003 for Gemini Customer Service. Do not attempt to return this equipment to your dealer.