Gemini-PMX350-mix-sm维修电路原理图.pdf

Page 1SERVICE MANUALPMX-350Professional MixerGemini Sound Products Corp.120 Clover Place P.O. Box 6928Edison, NJ 08818-6928732-738-9003 (Phone) 732-738-9006 (Fax)CONTENTS:Connections & Operations:.Page 2-3Specifications:.Page 3Parts Lists:.Page 4PCBs:.Page 5Schematics.Page 6RadioFans.CN 收音机爱 好者资料库Page 22112365416978101311131213191714181920152621222123242725RadioFans.CN 收音机爱 好者资料库Page 3IntroductionCongratulations on purchasing a Gemini model PMX -350 mixer. This-state-of-the-art mixer includes the latest features and is backed by athree year warranty, excluding crossfader and channel slides. Prior touse, we suggest that you carefully read all the instructions.Features2 Phono/Line Convertible, 1 Phono, 1 Line and 1 Mic inputGain controls for each channelRemovable CrossfaderCue SectionCautions1. All operating instructions should be read before using this equipment.2. To reduce the risk of electrical shock, do not open the unit. There areNO USER REPLACEABLE PARTS INSIDE. Please refer servicing to aqualified service technician.3. Do not expose this unit to direct sunlight or to a heat source such as aradiator or stove.4. This unit should be cleaned only with a damp cloth. Avoid solvents orother cleaning detergents.5. When moving this equipment, it should be placed in its original cartonand packaging. This will reduce the risk of damage during transit.6. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.7. DO NOT USE SPRAY CLEANERS OR LUBRICANTS ON CONTROLSOR SWITCHES.Connections1. Make sure that the POWER (22) switch is in the off position.2. This unit comes supplied with a 15 volt AC adaptor. Plug the male pinof the adaptor into the rear panel POWER JACK (6). Then plug theadaptor into a proper power source.3. To connect the mixer to your amplifier, use the MASTER (1) jacks onthe rear panel.4. The unit is equipped with one microphone input. The MIC JACK (15)is a 1/4 (6.35 mm) and is located on the front panel.5. On the rear panel are 2 stereo PHONO/LINE (3, 4) inputs, 1 stereoPHONO (5) input and 1 stereo LINE (2) input. The PHONO/LINESWITCHES (8, 9) enable you to set the (3, 4) inputs to Phono or Line.The PHONO (5) input will accept turntable inputs only. A GROUND (7)screw for you to ground your turntables is located on the rear panel.The stereo LINE (2) input will accept any line level input such as a CDplayer or a cassette player.6. Headphones can be plugged into the front panel mountedHEADPHONE (26) jack.Operation1. POWER ON: Once you have made all the equipment connections toyour mixer, press the POWER (22) switch. The power will turn on andthe POWER LED (21) will glow RED.2. CHANNEL 1: The GAIN (12) control allows you to individually adjustthe gain of Channel 1. Switch (13) allows you to select PHONO 1 (5)or the LINE 1/PHONO 2 (4) inputs. CHANNEL SLIDE (14) controls theinput level of this channel.3. CHANNEL 2: The GAIN (23) control allows you to individually adjustthe gain of Channel 2. Switch (24) allows you to select the LINE 2/PHONO 3 (3) or the LINE 3 (2) input. The CHANNEL SLIDE (25)controls the input level of this channel.4. CROSSFADER SECTION: The CROSSFADER (20) allows the mixing ofone source into another. The left side of the CROSSFADER isCHANNEL 1 and the right side is CHANNEL 2. The CROSSFADER inyour unit is removable and, should the need arise, can be easilyreplaced. Crossfader units are available in two varieties: part RF-45(which is identical to the crossfader supplied with this mixer) has a45 mm travel from side-to-side, while the PSF-45 is equipped with aspecial “curve” designed for scratch mixing.To install a new crossfader:1. Unscrew the outside FADER plate screws (B). Do nottouch the INSIDE SCREWS (C).2. Carefully lift the fader and unplug the CABLE (D).3. Plug the new fader into the cable and place it back in themixer.4. Screw the fader to the mixer.5. TALKOVER SECTION: The purpose of the talkover section is to allowthe program playing to be muted so that the mic can be heard abovethe music. When the TALKOVER (11) button is pushed, theTALKOVER INDICATOR (10) will glow and the volume of all sourcesexcept MIC are reduced by -16 dB. MIC (17) controls the level of thetalkover MIC.6. CUE SECTION: By connecting a set of headphones (26), you canmonitor either Channel 1 or Channel 2. Select Channel 1 by movingthe CUE SWITCH (19) to the left. Move to the right for Channel 2.Use the CUE (18) control to adjust the headphone volume withoutaffecting the overall mix.7. DISPLAY: The DISPLAY (16) indicates the MASTER output left andright levels as controlled by the MASTER LEVEL (27).SpecificationsINPUTS:Mic.1.5mV 600 OhmPhono.3 mV 47 kOhmLine.150 mV 27 kOhmOUTPUTS:Amp.0 dB 1V 400 OhmMax.20V Peak to PeakGENERAL:Gain (Channels 1 - 2).0 to -20 dBFrequency Response.20 Hz - 20 kHz +/- 2 dBDistortion.0.02%S/N Ratio.better than 80 dBTalkover Attenuation.-16 dBHeadphone Impedance.16 OhmPower Source.115V/15V AC 7.5 W230V/15V AC 7.5 WDimensions.6.5 x 9 x 3 (165 x 221 x 85 mm)Weight.3 lbs. (1.3 kg)In the USA: If you experience problems with this unit,In the USA: If you experience problems with this unit,In the USA: If you experience problems with this unit,In the USA: If you experience problems with this unit,In the USA: If you experience problems with this unit,call 1 (732) 738-9003 for Gemini Customer Service.call 1 (732) 738-9003 for Gemini Customer Service.call 1 (732) 738-9003 for Gemini Customer Service.call 1 (732) 738-9003 for Gemini Customer Service.call 1 (732) 738-9003 for Gemini Customer Service.Do not attempt to return this equipment to yDo not attempt to return this equipment to yDo not attempt to return this equipment to yDo not attempt to return this equipment to yDo not attempt to return this equipment to your dealerour dealerour dealerour dealerour dealer. . . . .Page 4PANEL CONTROLPANEL REARBOTTOM COVERBRACKET VR (SUB CHASSIS)HOLDER FADERKNOB SWING (LONG)KNOB PUSH (SMALL)KNOB BUSHING (SMALL)KNOB SLIDE (BIG)KNOB ROTARY (B TYPE)INLAY KNOB (SILVER)INLAY KNOB (RED)TRIM VRHOLDER LED (3f 17mm)PAD FOOTDUST PROOF CLOTE-VRSWING DUST PROOF CLOTHCLIP WIREGND SCREWSCREENSNAP RIVETParts Lists - PCBDescriptionPart #Cabinet Parts and Packing123456789101112131415161718192021Item #FACEPPMX350034-010032-018021-774022-366023-674002-531002-532002-724003-110148-312148-238003-970003-969049-206159-171159-216049-190146-710046-027003-612Parts Lists262-057262-058262-067262-068PRINTED CIRCUIT BOARD PMX40-1PRINTED CIRCUIT BOARD PMX40-2PRINTED CIRCUIT BOARD PMX40-3PRINTED CIRCUIT BOARD PMX40-4DescriptionPart #Printed Circuit BoardsItem #1234074-154074-145074-113074-114074-107INTEGRATED CIRCUIT LB1423NINTEGRATED CIRCUIT NJM2068LDINTEGRATED CIRCUIT NJM4556LINTEGRATED CIRCUIT NJM7912FAINTEGRATED CIRCUIT NJM7812FAIC3, IC41C1-2, IC5-6,IC10IC8IC7IC9DesignatorsDescriptionPart #ICsItem #12345076-094079-027079-012080-091080-104092-078072-035081-004082-018082-019083-080071-066071-161071-084072-113TRANSISTOR DTC114TSRECTIFIER DIODE 1N4002 (1N4003,1N4004)ZENER DIODE 1/2W 12VLIGHT EMITTING DIODE (RED) 3.15fLIGHT EMITTING DIODE (GREEN) 3.15fPHONE JACK 6.3f MIC,PHONESSLIDE VR 45mm CH1/CH2 50KA2SLIDE SWITCH 2P2CLEVER SWITCH 2P2C CUE CH1/CH2LEVER SWITCH 4P2C PHONO/LINEPUSH SWITCH 2P2C L=12.5 POWER,TALKOVERROTARY VR 16f L=20 MIC 50KAROTARY VR 16f L=20 GAIN 10KA2ROTARY VR 16f L=20 CUE 50KA2RAILGLIDE VR45mm X-FADER 100KX2Q1-4D12, D15D13, D16D1-3, D7-8, D14D4-6, D9-10, D11J1, J7VR2, VR6SW6, SW7SW3SW2, SW4SW1, SW5VR3VR1, VR5VR4X-FADERDesignatorsDescriptionPart #Electrical PartsItem #123456789101112131415Page 4PCBVR6A50KAVR6B50KAR715K6R5518KR705K6R5318KVR2A50KAVR2B50KAR205K6R3318KR215K6R2818K23148IC5A2068LD657IC5B2068LDC3210/16C3410/16C3122/16C3622/16R5210R4510-VCC+VCCJ6MASTERC6010/16C5510/16R81430R7847KR7947KR83430SW3ASW3BVR4A50KAVR4B50KAC514.7/16C534.7/16R80120K23148IC8A4556657IC8B4556R77120KR9110R8910C64220/16C68220/16R9247R9047C58472C69472J7123469758B1423NIC3B1423ND6LEDD5LEDD4LEDD3LEDD2LEDR4347R3010KR344K3C1910/16R4033KR6133K+VCC-VCCC424.7PC434.7P+VCC-VCCCH2CH1CH1/CH2CUECUEPOWERD14LEDR884K3R57470KR56470KR8627KR761KR8527KR821KVR1A10KAVR1B10KAR3510KVR350KA23148IC2A2068LDC2410/16C2722/16C1722/16R3647R3947C122/16C322/16C14101C13101J1R2630K1 1%R21K 1%R3191KR31K 1%C2110/16R2530K1 1%657IC2B2068LDMICMICC2622PR54K3D1LED+VCC-VCC+VCC123469758B1423NIC4B1423ND11LEDD10LEDD9LEDD8LEDD7LEDR4447R5410KR514K3C3810/16-VCCR101KR91KVR5A10KAVR5B10KAR731KR671KD151N4002D121N4002C62470/25C66470/25+VCC-VCCVin1GND2Vout3IC97812Vin2GND1Vout3IC77912C671/50C631/50D13Z 12VD16Z 12VSW5ASW5BR87750R84750POWERC6147/16C6547/16R371K8R291K8SW1ASW1BR3291K+VCC-VCC23148IC1A2068LD657IC1B2068LDR12100KR1747R3847R118K2R19180R447KR168K2R647KR22180R15100KC7822C256C6273C456C9273C10822C1122/16C1647/16C1522/16C1247/16R71KR131KC510/16C1810/16C810/16C2310/16+VCC-VCC23148IC6A2068LD657IC6B2068LDR49100KR6647R7247R488K2R50180R4147KR658K2R4647KR59180R64100KC29822C2856C33273C3556C40273C46822C4422/16C3747/16C4522/16C3047/16R421KR471KR581KR741KC48101C49101C4110/16C5210/16C4710/16C5010/16R81KR181KR751KR601KJ2J3J4J5SW2ASW2BSW2CSW2DSW4ASW4BSW4CSW4DX3C5947/16C5447/16C5647PC5747PC200.47C390.47Q2DTC114TSQ1DTC114TSQ4DTC114TSQ3DTC114TSR691K8R621K8R120K+VCCR2416KR2316KR6316KR6816KT.OT.O654321LRX-FADER100KBAC 15V+VCC-VCC23148IC10A2068LD657IC10B2068LDR99100KR9347R9447R1018K2R103180R1447KR1028K2R2747KR104180R100100KC72822C7456C76273C7556C77273C73822C2222/16C7047/16C2522/16C7147/16R951KR961KR971KR981K123X1X4Page 5Schematic