Gemini PMX-80 Service Manual

Contents

Gemini PMX-80 Service Manual Manual pdf 4 page image

Page 4Connections1. Make sure that the POWER (6) switch is in the OFF position. This unitcomes supplied with a 15 volt AC adaptor. Plug the male pin of theadaptor into the rear panel POWER JACK (7). Then plug the adaptorinto a proper power source.2. The MASTER OUTPUT (1) jacks are unbalanced and used to connectto 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 stereoPHONO (5) input and 1 stereo LINE (2) input. The PHONO/LINESWITCHES (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 onthe rear panel. The stereo line inputs will accept any line level inputsuch as a CD player, a cassette player, etc.5. Headphones can be plugged into the front panel mounted PHONES(36) 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 (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 thischannel.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 thischannel.4. KILLING LOW FREQUENCIES: You can use the Kill Feature on eachchannel to remove Low band frequencies to create special effectsand improve your mix. Move the KILL SWITCH (17) down to removethe 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.5. CROSSFADER SECTION: The CROSSFADER (27) allows the mixing ofone source into another. The left side of the CROSSFADER (27) isCHANNEL 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 (whichis identical to the crossfader supplied with the mixer) has a 45 mmtravel from side to side. Part # RF-30 is available with a 30 mm traveldistance. Also available is the PSF-45 with a special curve designedfor scratch mixing. Just purchase one of these crossfader units fromyour Gemini dealer and follow these instructions: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.The CROSSFADER CURVE SWITCH (28) allows you to adjust the kindof curve the crossfader has. When the switch is in the left position,the curve is gradual and gentle. When the switch is in the rightposition, the curve is steep and cutting (perfect for scratching). TheCROSSFADER REVERSE SWITCH (26) allows you to reverse thecrossfader so that CHANNEL 2 is controlled by the left side of thecrossfader and CHANNEL 1 is controlled by the right side of thecrossfader.NONONONONOTETETETETE: W hen the CRCRCRCRCROSSFOSSFOSSFOSSFOSSFADER REVERSE SWITADER REVERSE SWITADER REVERSE SWITADER REVERSE SWITADER REVERSE SWITCHCHCHCHCH(26)(26)(26)(26)(26) is activated (moved to the right), only the crossfaderreverses. The Channel Slides, Gain, Kill Switches and tonalcontrols do not reverse.6. OUTPUT CONTROL SECTION: The level of the MASTER OUTPUT (1) iscontrolled by the MASTER (21) control.7. 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. The MIC/TALKOVER (19) switch has three settings. Whenthe MIC/TALKOVER (19) switch is in the left position, the mic andtalkover are both off. When the MIC/TALKOVER (19) switch is in thecenter position the mic is on, the MIC INDICATOR will glow, buttalkover is off. When the MIC/TALKOVER (19) switch is in the rightposition, the mic and talkover will be on and the volume of all sourcesexcept the Mic input are lowered by 16 dB. MIC LEVEL (20) controlsthe 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 theCUE SWITCH (25) to the left to monitor CHANNEL 1. Move the CUESWITCH (25) to the right to monitor CHANNEL 2. Move the CUESWITCH (25) to the center position to split the signals from eachchannel so that CHANNEL 1 will be heard in one earphone andCHANNEL 2 will be heard in the other earphone. Use the CUE LEVEL(22) control to adjust the headphone volume without effecting theoverall mix.9. DISPLAY: The DISPLAY (24) indicates the MASTER output.SpecificationsINPUTS:DJ Mic..............................................................1.5mV 600 OhmPhono.........................................................................3mV 47KohmLine.......................................................................150 mV 27KohmOUTPUTS:Amp.................................................................0 dB 1V 400ohmMax..............................20V Peak to PeakGENERAL:Low (Channels 1 - 2)........................................................+ 12dB/-32 dBMid (Channels 1 - 2).........................................................+ 12dB/-32 dBHigh (Channels 1 - 2).....................................................+ 12dB/-32 dBGain (Channels 1 - 2)...........................................................0 to -20dBFrequency Response....................................20Hz - 20KHz +/- 2dBDistortion................................................................................0.02%S/N Ratio...............................................................better than 80dBTalkover Attenuation..............................................................-16dBHeadphone Impedance.........................................................16ohmPower Source........................................................115V/15V AC 7.5W230V/15V AC 7.5WDimensions.......................................6.5” x 14” x 3” (165 x 355 x 85 mm)Weight........................................................................................5 lbs (2.27 kg)