Pmx-80

Transcript

SERVICE MANUAL PMX-80 Stereo Preamp Mixer CONTENT’S: Connections & Operations:.......................................................Page 2-4 Specifications:..............................................................................Page 5 Parts Lists:.................................................................................Page 6-8 PCBs:..........................................................................................Page 7-9 Schematics:.................................................................................Page 10 Gemini Sound Products Corp. 120 Clover Place P.O. Box 6928 Edison, NJ 08818-6928 732-738-9003 (Phone) • 732-738-9006 (Fax) Page 1 9 7 1 2 3 4 5 1 2 3 4 5 6 8 Page 2 10 19 11 29 12 20 30 13 21 31 14 22 32 15 33 23 24 16 34 25 26 17 35 27 36 18 28 Page 3 Connections The CROSSFADER CURVE SWITCH (28) allows you to adjust the kind of curve the crossfader has. When the switch is in the left position, the curve is gradual and gentle. When the switch is in the right position, the curve is steep and cutting (perfect for scratching). The CROSSFADER REVERSE SWITCH (26) allows you to reverse the crossfader so that CHANNEL 2 is controlled by the left side of the crossfader and CHANNEL 1 is controlled by the right side of the crossfader. 1. Make sure that the POWER (6) switch is in the OFF position. 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. The MASTER OUTPUT (1) jacks are unbalanced and used to connect to your main amplifier. 3. The DJ MIC (18) input (found on the front panel) accepts a 1/4" connector and balanced and unbalanced microphones. 4. On the rear panel are 2 stereo PHONO/LINE (3, 4) inputs, 1 stereo PHONO (5) input and 1 stereo LINE (2) input. The PHONO/LINE SWITCHES (8, 10) enable you to set the (3, 4) inputs to Phono or Line. The phono inputs will accept only turntables with a magnetic cartridge. A GROUND SCREW (9) for you to ground your turntables is located on the rear panel. The stereo line inputs will accept any line level input such as a CD player, a cassette player, etc. 5. Headphones can be plugged into the front panel mounted PHONES (36) jack. Operation NO TE OSSF ADER REVERSE SWIT CH NOTE TE: W hen the CR CROSSF OSSFADER SWITCH (26) is activated (moved to the right), only the crossfader reverses. The Channel Slides, Gain, Kill Switches and tonal controls do not reverse. 6. OUTPUT CONTROL SECTION: The level of the MASTER OUTPUT (1) is controlled by the MASTER (21) control. 7. TALKOVER SECTION: The purpose of the talkover section is to allow the program playing to be muted so that the mic can be heard above the music. The MIC/TALKOVER (19) switch has three settings. When the MIC/TALKOVER (19) switch is in the left position, the mic and talkover are both off. When the MIC/TALKOVER (19) switch is in the center position the mic is on, the MIC INDICATOR will glow, but talkover is off. When the MIC/TALKOVER (19) switch is in the right position, the mic and talkover will be on and the volume of all sources except the Mic input are lowered by 16 dB. MIC LEVEL (20) controls the level of the MIC. 8. CUE SECTION: By connecting a set of headphones to the PHONES (36) jack, you can monitor either channel or both together. Move the CUE SWITCH (25) to the left to monitor CHANNEL 1. Move the CUE SWITCH (25) to the right to monitor CHANNEL 2. Move the CUE SWITCH (25) to the center position to split the signals from each channel so that CHANNEL 1 will be heard in one earphone and CHANNEL 2 will be heard in the other earphone. Use the CUE LEVEL (22) control to adjust the headphone volume without effecting the overall mix. 1. 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 (23) will glow RED. 2. CHANNEL 1: The GAIN (11), HIGH (12), MID (13), and LOW (14) controls allow you to fully adjust the selected source. Switch # (15) allows you to select either the PHONO 1 (5) or the PHONO 2/LINE 1 (4) input. The CHANNEL SLIDE (16) controls the output level of this channel. 3. CHANNEL 2: The GAIN (29), HIGH (30), MID (31), and LOW (32) controls allow you to fully adjust the selected source. Switch # (33) allows you to select either the PHONO 3/LINE 2 (3) or the LINE 3 (2) input. The CHANNEL SLIDE (34) controls the output level of this channel. 9. DISPLAY: The DISPLAY (24) indicates the MASTER output. 4. KILLING LOW FREQUENCIES: You can use the Kill Feature on each channel to remove Low band frequencies to create special effects and improve your mix. Move the KILL SWITCH (17) down to remove the low band of Channel 1 from your mix. Move the KILL SWITCH (35) down to remove the low band of Channel 2 from your mix. INPUTS: Specifications DJ Mic..............................................................1.5mV 600 Ohm Phono.........................................................................3mV 47Kohm 5. CROSSFADER SECTION: The CROSSFADER (27) allows the mixing of one source into another. The left side of the CROSSFADER (27) is CHANNEL 1 and the right side is CHANNEL 2. The CROSSFADER (27) in your unit is removable and if the need arises can be easily replaced. Crossfader units are available in three varieties. Part # RF-45 (which is identical to the crossfader supplied with the mixer) has a 45 mm travel from side to side. Part # RF-30 is available with a 30 mm travel distance. Also available is the PSF-45 with a special curve designed for scratch mixing. Just purchase one of these crossfader units from your Gemini dealer and follow these instructions: 1. Unscrew the outside FADER PLATE SCREWS (B). Do not touch 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 the mixer. 4. Screw the fader to the mixer. Line.......................................................................150 mV 27Kohm OUTPUTS: Amp.................................................................0 dB 1V 400ohm Max..............................20V Peak to Peak GENERAL: Low (Channels 1 - 2)........................................................+ 12dB/-32 dB Mid (Channels 1 - 2).........................................................+ 12dB/-32 dB High (Channels 1 - 2).....................................................+ 12dB/-32 dB Gain (Channels 1 - 2)...........................................................0 to -20dB Frequency Response....................................20Hz - 20KHz +/- 2dB Distortion................................................................................0.02% S/N Ratio...............................................................better than 80dB Talkover Attenuation..............................................................-16dB Headphone Impedance.........................................................16ohm Power Source........................................................115V/15V AC 7.5W 230V/15V AC 7.5W Dimensions.......................................6.5” x 14” x 3” (165 x 355 x 85 mm) Weight........................................................................................5 lbs (2.27 kg) Page 4 Parts Lists Cabinet Parts and Packing Item # Description Part # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 PANEL CONTROL PANEL REAR BOTTOM COVER BRACKET VR (SUB CHASSIS) HOLDER FADER KNOB SWING (LONG) KNOB PUSH (SMALL) KNOB SLIDE (BIG) KNOB ROTARY (B TYPE) INLAY KNOB (BLACK) INLAY KNOB (GRAY) INLAY KNOB (RED) TRIM VR HOLDER LED (3f 17mm) PAD FOOT DUST PROOF CLOTE-VR SWING DUST PROOF CLOTH GND SCREW BUSHING WIRE BAND-HEAD TAPPING SCREW/TW-E 3×6(AB) FLAT-HEAD TAPPING SCREW 3f×6(AB) BAND-HEAD TAPPING SCREW 3×6(AB) FLAT-HEAD TAPPING SCREW 3f×12(AB) BAND-HEAD TAPPING SCREW 3f×5(AB) BAND-HEAD TAPPING SCREW (TWIN) 3f×8 (AB) PAN-HEAD MACHINE SCREW 2.6f×4(B) 002-223 034-020 032-027 021-776 022-367 023-674 002-531 002-704 003-110 148-236 148-239 148-238 003-970 003-969 049-206 159-171 159-216 146-710 049-190 121-003A 111-043A 111-046A 111-049A 111-051A 110-172A 102-025 Printed Circuit Boards Item # 1 2 3 Description PRINTED CIRCUIT BOARD PMX80-1 PRINTED CIRCUIT BOARD PMX80-2 PRINTED CIRCUIT BOARD PMX80-3 Page 5 Part # 262-073 262-074 262-075 Parts Lists - PCB1 Input Output ICs Item # 1 2 3 Designators IC1, IC2, IC3 IC5 IC4 Description INTEGRATED CIRCUIT NJM2068LD INTEGRATED CIRCUIT NJM7912FA INTEGRATED CIRCUIT NJM7812FA Part # 074-145 074-114 074-107 Electrical Parts Item # 1 2 3 4 5 6 Designators D3, D4 D1, D2 SW3 J4 J1 J2 Description RECTIFIER DIODE 1N4002 (1N4003,1N4004) ZENER DIODE 1/2W 12V SLIDE SWITCH DC JACK 2.5 4P RCA JACK 6P RCA JACK Part # 079-027 079-012 081-038 092-135 161-105 161-106 Parts Lists - PCB2 Main ICs Item # 1 2 3 4 Designators IC4 IC10 IC1-2, IC6, IC8, IC9 IC3, IC7 Description Part # INTEGRATED CIRCUIT NJM2068LD INTEGRATED CIRCUIT NJM4556AD INTEGRATED CIRCUIT NJM4558LD 074-145 074-100 074-104 INTEGRATED CIRCUIT OR LB1423N 074-154 Electrical Parts Item # Designators 1 2 3 4 5 6 D9-12 SW4 SW2, SW5, SW7 VR3, VR9 VR8 VR6 Description LIGHT EMITTING DIODE (GREEN) 3.15f SLIDE SWITCH LEVER SWITCH 4P2C ROTARY VR 16f L=20 GAIN 10KA×2 ROTARY VR 16f L=20 MIC 50KA ROTARY VR 16f L=20 MASTER, 500KA×2 Page 6 Part # 080-104 081-038 082-019 071-161 071-066 071-158 SW2B SW2A L3 PH3/L2 PH2/L2 PH2/L2 PH3/L2 SW1B SW1A PH1 J2B J2A J1B J1A 180 R29 1K R44 1K 2 3 2 822 8K2 C33 R40 8K2 822 R21 C17 56 C16 56 C21 C39 101 C38 101 8K2 822 R35 C31 6 5 C28 56 56 C32 1K R32 R34 47K R38 47K 6 822 8K2 C18 R24 8K2 822 R6 R36 3 1K 1K R20 R39 180 180 R17 6 5 C6 56 C4 56 C8 R23 5 1K 1K R16 47K 2 R8 3 1K R4 R22 47K 180 R28 180 R7 47K R11 47K 8K2 C9 180 822 R9 R12 R1 R43 C25 47/16 47/16 C29 C20 47/16 47/16 C24 C1 47/16 47/16 C5 273 1 7 1K R15 1K R25 1K R3 1K R14 100K 273 R33 C26 7 10/16 C40 10/16 C37 1K R31 1 R42 1K 2068LD IC3A 273 100K C36 R41 100K 273 R18 +3 C14 1 IC2A 2068LD -3 IC2B 2068LD 273 IC3B 2068LD -2 +2 7 100K C23 R26 100K 273 R5 C2 IC1B 2068LD IC1A -1 2068LD +1 100K C11 R13 10/16 C30 10/16 C35 10/16 C13 10/16 C19 10/16 C7 10/16 C12 X2 X1 X5 X1 SW7D SW7B SW7C SW7A LN3;PH3\LN2 SW2D SW2B SW2C SW2A PH1;PH2\LN1 GAIN GAIN R98 1K 10KAx2 VR9B 1K R97 10KAx2 VR9A R22 1K 10KAx2 VR3B R21 1K 10KAx2 VR3A 50KA VR11B CH-2 50KA VR11A 50KA VR5B CH-1 50KA VR5A 2K R88 5 6 R110 100K 3 5K6 IC6-8 2 2K 181 C59 R10 100K R95 10/16 C73 10/16 C77 5 R87 10/16 C24 5K6 2K 181 C9 IC5-4 R15 6 R9 100K 3 2 5K6 IC5-8 R19 181 C8 R1 10/16 C23 2K R4 R111 100K 5K6 R96 181 C60 IC6-4 4558LD 7 10/16 C55 10/16 IC9B C56 4558LD 10/16 C28 IC9A 1 4558LD 7 10/16 IC2B C26 4558LD 1 IC2A VR12A C54 154 3K6 VR12B 33K R106 SW4 50KEx2 43K R63 43K R60 43K R52 43K R46 103 C69 VR13B 2K4 50KEx2 R91 3K6 1K5 C63 154 R92 R84 103 C70 VR13A 50KEx2 33K R107 103 R94 2K4 50KEx2 R90 1K5 R83 33K R29 C15 VR1B C27 154 3K6 VR2B 50KEx2 103 R32 2K4 50KEx2 R28 1K5 R33 33K R24 50KEx2 VR2A C14 VR1A 2K4 50KEx2 R23 3K6 1K5 C17 154 R34 R31 33K C74 562 4K7 R112 33K R89 R109 24K SW4D SW4B SW4A SW4C 8K2 R105 5K6 R99 R100 C68 562 4K7 R85 33K R86 R93 24K VR10B 8K2 R108 5K6 R104 50KEx2 33K R103 C11 562 4K7 R17 33K R30 R16 24K VR10A 8K2 R13 5K6 R7 50KEx2 33K R20 C3 562 4K7 R14 33K R27 R25 24K VR4B 8K2 R12 5K6 R8 50KEx2 33K R11 50KEx2 VR4A C71 682 5 6 C58 154 C62 682 3 2 C57 154 C12 682 5 6 C25 154 C20 682 3 2 C21 154 1 7 CH2 SPL CH1 4558LD IC8B C75 56P 1K5 R101 4558LD IC8A C61 56P 1K5 R82 IC8-4 7 4558LD IC1B C4 56P 1K5 IC8-8 1 4558LD IC1A C22 56P R18 IC7-4 IC7-8 1K5 R26 2 VR7A 50KA R125 20K R124 20K R62 20K R51 20K 6 47/16 5 C42 182 C66 182 C67 182 C18 182 C19 SW1A C16 22/16 C7 22/16 SW8A SW8B 10 4558 7 22/16 IC5B C45 22P 1 R54 4558 IC5A C36 22P 22/16 2K R117 -VCC R116 2K C49 SW1B 1 2 3 CUE LEVEL C34 50KA VR7B 47/16 3 C39 10/16 C76 10/16 C79 10/16 C6 10/16 C1 MIC J1 10 R67 R56 30K1 1% 1K 1% R47 1K 1% R40 5 6 3 75K 20K R55 3K3 20K 4556 IC10B C81 22P R119 1 7 C83 4556 IC10A C80 22P R118 R64 2 SW6D 75K R43 SW6C SW6B 75K 4K3 +VCC 75K R53 SW6A R61 7 10 47 R121 220/16 220/16 C82 10/16 C46 R123 47 R120 75K R35 75K R36 75K R37 75K R39 CURVE 2068LD IC4B R80 4K3 R81 4K3 R79 4K3 R58 C41 68P 5 6 30K1 1% R48 68P C35 10 R122 -VCC +VCC C43 C51 1 2 3 J2 22/16 R70 10 IC3-4 22/16 C37 R71 10 IC3-8 X3 CUE 22/16 R65 10 R49 10 -VCC IC2-4 22/16 C47 IC2-8 SW5D SW5C SW5B SW5A 1 -2 \ 2 -1 X-F NORM/REV LED 4K3 R59 10/16 C50 D6 SW3C 2068LD IC3-4 1 SW3D MIC OFF MIC ON TALKOVER IC3-8 IC4A +VCC 3 2 22P C40 VR8 50KA 8 4 8 4 4 8 8 4 8 4 8 4 8 4 8 4 C2 IC5-4 22/16 C10 IC5-8 22/16 C78 R6 10 IC6-4 22/16 C64 R5 10 IC6-8 1 2 3 4 5 6 300K R72 300K R76 1 22/16 C13 R115 10 IC7-4 22/16 C5 R102 10 IC7-8 22/16 C65 R3 10 IC8-4 22/16 C72 R2 10 IC8-8 2 R42 10K 3 -VCC +VCC 7 22/16 R113 10 R114 10 10/16 C29 X-FADER LB1403N IC3 4 GREEN GREEN RED GREEN 5 RED 390K R77 SW3B 390K R73 SW3A R38 4K3 6 1 2 1 10/16 C53 AC15V-JACK C30 0.47/16 J4 R69 47 D10 D11 LED LED 10/16 C32 10/16 C31 -VCC 1N4002 D4 1N4002 D3 5 VR6A 500KA R47 750 SW3A Z 12V D1 Z 12V D2 1 Vin 2 Vin C47 IC5 1000/25 7912 C45 100/16 C48 100/16 C44 1000/25 R74 30K LB1403N IC7 POWER SW3B R48 750 IC6B 4558LD 6.8P 7 C44 1 R50 30K R78 4K3 0.47/16 C52 9 IC6A IC2-44558LD 500KA 6 RED D12 LED IC2-8 VR6B 3 2 6.8P C38 R75 10K GREEN GREEN RED GREEN D9 LED 2 D8 LED 3 D1 LED 4 R45 47 7 D3 D2 LED LED 6 D4 LED 5 D5 LED 8 -15 -9 -3 0 +3 8 +VCC 8 4 MAIN PCB 8 4 Vout Vout IC4 7812 430 3 3 C27 C46 -1 1/50 R10 -2 10 C10 22/16 R37-3 10 C34 22/16 22/16 R19 10 C15 22/16 R27 10 +VCC C22 R30 10 +3 X4 -VCC 22/16 +2 22/16 C3 R2 10 X2 +1 D7 LED R57 1K -VCC C43 1/50 R41 430 R66 R68 47K R44 47K POWER 10/16 C48 10/16 C33 GND 2 1 IN/OUT PCB 8 4 L R Page 8 GND -15 -9 -3 0 +3 J2C X3 X4 MASTER -VCC +VCC Schematic 9