Gemini-PMX20-mix-sch维修电路原理图.pdf

Page 1SERVICE MANUALPMX-20Stereo Preamp MixerCONTENTS:Connections & Operations:.Page 2-3Specifications:.Page 3Parts Lists:.Page 3PCBs:.Page 4Schematics.Page 5Gemini Sound Products Corp.120 Clover Place P.O. Box 6928Edison, NJ 08818-6928732-738-9003 (Phone) 732-738-9006 (Fax)RadioFans.CN 收音机爱 好者资料库Page 2101815131716911681234571412RadioFans.CN 收音机爱 好者资料库Page 3074-022074-145074-104074-113074-114074-107INTEGRATED CIRCUIT LB1403NINTEGRATED CIRCUIT NJM2068LDINTEGRATED CIRCUIT NJM4558L (M5218AL,BA4558N)INTEGRATED CIRCUIT NJM4556LINTEGRATED CIRCUIT NJM7912FAINTEGRATED CIRCUIT NJM7812FAIC5IC1, IC2IC3IC4IC7IC6DesignatorsDescriptionPart #ICsItem #123456079-027080-091072-081072-035071-084RECTIFIER DIODE 1N4002 (1N4003,1N4004)LIGHT EMITTING DIODE (RED) 3.15fSLIDE VR 45mm L=20 FADER 100KB2SLIDE VR 45mm L=20 CH1/CH2 50KA2ROTARY VR 16f L=20 50KA2D7, D8D1-6VR3VR1, VR2VR4DesignatorsDescriptionPart #ICs Electrical PartsItem #12345Connections1. This unit comes supplied with a 15 volt AC adaptor. Plug the malepin of the adaptor into the rear panel POWER JACK (7). Then plugthe adaptor into a proper power source.2. Make sure that the POWER (6) switch is in the off position. ThePOWER 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 stereoLINE (2, 4) inputs. The PHONO (3, 5) inputs will accept turntableinputs only. A GROUND (8) screw for you to ground your turntablesis located on the rear panel. The stereo LINE (2, 4) inputs will acceptany line level input like a CD player or a cassette player.5. Headphones can be plugged into the front panel mountedHEADPHONE (18) jack.Operation1. POWER ON: Once you have made all the equipment connections toyour mixer, press the POWER (6) switch. The power will turn on andthe POWER LED (12) will glow RED.2. CHANNEL 1: The CHANNEL LEVEL SLIDE (10) allows you to fullyadjust the level of the selected source. The PHONO/LINE (9) switchallows you to select either Line 1 or Phono 1 to play throughchannel 1.3. CHANNEL 2: The CHANNEL LEVEL SLIDE (17) allows you to fullyadjust the level of the selected source. The PHONO/LINE (16) switchallows you to select either Line 2 or Phono 2 to play throughchannel 2.4. CROSSFADER SECTION: The CROSSFADER (15) allows themixing of one source into another. The left side of theCROSSFADER (15) is channel 1 and the right side is channel 2.5. CUE SECTION: By connecting a set of headphones to theHEADPHONE (18) jack, you can monitor either channel 1 or channel2. Select Channel 1 by moving the CUE SWITCH (14) to the left orChannel 2 by moving the CUE SWITCH (14) to the right. Use theCUE LEVEL (13) control to adjust the headphone volume withouteffecting the overall mix.6. DISPLAY: The DISPLAY (11) indicates the MASTER (1) output.SpecificationsINPUTS:Phono.3mV 47KohmLine.150 mV 27KohmOUTPUTS:Amp.0 dB 1V 400ohmMax.10V Peak to PeakGENERAL:Frequency Response.20Hz - 20KHz +/- 2dBDistortion.0.02%S/N Ratio.better than 80dBHeadphone Impedance.16ohmPower Source.115V/15V AC 7.5Wor 230V/15V AC 7.5WDimensions.6.5” x 7.5” x 2” (165 x 192 x 53 mm)Weight.2 lbs (1 kg)DescriptionPart #Cabinet Parts and Packing1234567891011121314151617181920Item #Parts Lists002-202032-012023-674003-110148-236002-704003-712159-215159-171159-216003-969146-710049-205046-026003-612110-166111-043A111-046A110-172A110-168PANEL CONTROLCOVER BOTTOMKNOB SWING (LONG)KNOB ROTARY (B)KNOB INLAY (BLACK)KNOB SLIDE (BIG)HOLDER MICDUST PROOF CLOTHVR DUST PROOF CLOTHSWING DUST PROOF CLOTHHOLDER LED 3fLED (17mm)GND SCREWPAD FOOTSCREENSNAP RIVETPAN-HEAD TAPPING SCREW/TWIN SCREW 26(B)FAND-HEAD TAPPING SCREW 36(AB)BAND-HEAD TAPPING SCREW 36(AB)PAN-HEAD TAPPING SCREW/TWIN SCREW 38(AB)PAN-HEAD TAPPING SCREW/WASHER 310(B)262-037PRINTED CIRCUIT BOARD PC-PMX-5DescriptionPart #Printed Circuit BoardsItem #1PCBPage 423148IC1A2068R11KR1547KR218K2R25100KR31180R3547R3647C1822C5273C9101C13221R21KC194.7/16C204.7/16C2922/16C3022/16C3547/16J1PHONO2J2LINE2657IC1B2068R31KR1647KR228K2R26100KR32180C2822C6273C10101C214.7/16C3647/16R41KR51K+VCC-VCCC14221R61KC224.7/16SW1DSW1BSW1CSW1AVR1A50KAVR1B50KAR445K6R4839KR455K6R4939KVR3A100KBVR3B100KB23148IC2A2068R71KR1747KR238K2R27100KR33180R3747R3847C3822C7273C11101C15221R81KC234.7/16C244.7/16C3122/16C3222/16C3747/16J3PHONO1J4LINE1657IC2B2068R91KR1847KR248K2R28100KR34180C4822C8273C12101C254.7/16C3847/16R101KR111K+VCC-VCCC16221R121KC264.7/16SW2CSW2DSW2ASW2BVR2A50KAVR2B50KAR465K6R5039KR475K6R5139K23148IC3A4558657IC3B4558C4110/16C4210/16C3322/16C3422/16R3947R4047-VCC+VCCJ5MASTERC4310/16C4410/16R52430R1947KR2047KR53430SW3ASW3BVR4A50KAVR4B50KAC274.7/16C284.7/16R54100K23148IC4A4556657IC4B4556R55100KR5610R5710C46220/16C47220/16R4147R4247C17472C18472J6D1LEDD2LEDD3LEDD4LEDD5LEDR4347R5810KR594K3C4510/16R2962KR3062K+VCCD71N4002D81N4002C48470/25C49470/25-VCC+VCC-VCCC5010PC5110P+VCC-VCCCH2CH1PH1/LN1PH2/LN2CH1/CH2CUECUEX-FADERPOWERD6LEDR60750IC67812IC77912C521/50C531/50R61240KR62240KX1 R633K9R13330R643K9R14330C3947/16C4047/16192634785IC5LB1403NPage 5SchematicPage 4Worldwide Headquarters 120 Clover Place, Edison, NJ 08837 USATel: (732) 738-9003 Fax: (732) 738-9006France G.S.L. France 11, Avenue Leon Harmel, Z.I. Antony, 92160 Antony, FranceTel: + 33 (0) 1 55 59 04 70 Fax: + 33 (0) 1 55 59 04 80Germany Gemini Sound Products GmbH Ottostrasse 6, 85757 Karlsfeld, GermanyTel: 08131 - 39171-0 Fax: 08131 - 39171-9UK Gemini Sound Products Unit C4 Hazleton Industrial Estate, Waterlooville, UK P08 9JUTel: 087 087 00880 Fax: 087 087 00990Spain Gemini Sound Products S.A. Rosello, 516, Barcelona, Spain, 08026Tel: 349-3435-0814 Fax: 3493-347-6961 Gemini Sound Products Corp. 2002 All Rights ReservedParts of the design of this product may be protected by worldwidepatents.Information in this manual is subject to change without notice and doesnot represent a commitment on the part of the vendor. Gemini SoundProducts Corp. shall not be liable for any loss or damage whatsoeverarising from the use of information or any error contained in thismanual.No part of this manual may be reproduced, stored in a retrieval system ortransmitted, in any form or by any means, electronic, electrical,mechanical, optical, chemical, including photocopying and recording, forany purpose without the express written permission of Gemini SoundProducts Corp.It is recommended that all maintenance and service on this product isperformed by Gemini Sound Products Corp. or its authorized agents.Gemini Sound Products Corp. will not accept liability for loss or damagecaused 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.