Gemini-BPM500-mix-sm维修电路原理图.pdf

Page 1SERVICE MANUALBPM-500Stereo Preamp MixerCONTENTS:Connections & Operations:.Page 2-5Specifications:.Page 5Parts Lists:.Page 6-8PCBs:.Page 9-11Schematics.Page 12Gemini 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 212345672489101112201320158910111420891011162089101118171926273233363435424143394031383730292823222125RadioFans.CN 收音机爱 好者资料库Page 3444545464647474848494950505151525254545555565861575759596460606262536365Page 4Connections1. Before plugging in the power cord, make sure that the VOLTAGESELECTOR (44) switch is set to the correct voltage.NONONONONOTETETETETE: This product is double insulated and not intended tobe grounded.2. Make sure that the POWER (39) switch is in the off position. ThePOWER LED (38) will be off.3. The BPM-500 is supplied with 4 sets of amp output jacks. TheBALANCED OUTPUT (45) jacks are used to connect to your mainamplifier using standard XLR cables. We recommend using thebalanced amp outputs if the cables to your amp are 25 feet or more.BALANCED OUTPUTS have three separate conductors, two of whichare signal (positive and negative) and one shield (ground). Pin 1 isground (shield). Pin 2 is signal hot (positive). Pin 3 is signal cold(negative). The MAIN OUTPUT (46) jacks are unbalanced and used toconnect to your main amplifier. The REC OUTPUT (48) jacks can beused to connect the mixer to the record input of your recorder enablingyou to record your mix. The BOOTH OUTPUT (47) jacks allow you tohook up an additional amplifier.4. The MIC 1 (1) input (found on the front panel) accepts a 1/4 or XLRconnector. The MIC 2 (63) input and the MIC 3 (53) input (found on therear panel) accept 1/4 connectors. All accept balanced andunbalanced microphones.5. On the rear panel are 3 stereo PHONO/LINE (55, 59, 62) inputs and 5stereo LINE (51, 52, 54, 57, 60) inputs. The PHONO/LINE SWITCH(56) enables you to set the (55) input to Phono or Line. The PHONO/LINE SWITCH (58) enables you to set the (59) input to Phono or Line.The PHONO/LINE SWITCH (61) enables you to set the (62) input toPhono or Line. The phono inputs will accept only turntables with amagnetic cartridge. A GROUND SCREW (64) for you to ground yourturntables is located on the rear panel. The stereo line inputs willaccept any line level input such as a CD player, a cassette player, etc.6. Headphones can be plugged into the front panel mountedHEADPHONE (43) jack.7. The BPM-500 comes with a front panel BNC LIGHT (37) jack. Thisjack is for use with a gooseneck light like the Gemini GNL-700.8. There are LOOP INPUTS (50) and LOOP OUTPUTS (49) located onthe rear panel. If you are using an outboard signal processor, you canuse the LOOP OUTPUTS (49) to send the signal to the device and theLOOP INPUTS (50) to bring the signal back in to the mixer. The unitcomes with jumpers to be used with the loop inputs and outputs. Keepthe jumpers in the unit if you are not using the loop to preventinterruptions in your music program.Using the Ground Lift SwitchDepending on your system configuration, sometimes applying the groundwill create a quieter signal path. Sometimes lifting the ground caneliminate ground loops and hum to create a quieter signal path.1. With the mixer on, listen to the system in idle mode (no signal present)with the ground applied (the GROUND LIFT SWITCH (65) in the leftposition).2. Then turn the power off before moving the GROUND LIFT SWITCH(65). Lift the ground by moving the GROUND LIFT SWITCH to theright, turn the power back on and listen to determine which position willprovide a signal devoid of background noise and hum. Keep theGROUND LIFT SWITCH in the ground position if the noise levelremains the same in either position.CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWERMIXER IN ANY WAY. TERMINATION OF THE AC GROUND CAN BEHAZARDOUS.Operation1. POWER ON: Once you have made all the equipment connections toyour mixer, press the POWER SWITCH (39). The power will turn on andthe POWER LED (38) will glow RED.2. CHANNEL 1: The GAIN (8), HIGH (9), MID (10), and LOW (11)controls allow you to fully adjust the selected source. Switch # (12)allows you to select the PHONO 1/LINE 1 (62) or the LINE 2 (60)input. The CHANNEL SLIDE (13) controls the input level of thischannel.3. CHANNEL 2: The GAIN (8), HIGH (9), MID (10), and LOW (11)controls allow you to fully adjust the selected source. Switch # (14)allows you to select the PHONO 2/LINE 3 (59) or the LINE 4 (57) input.The CHANNEL SLIDE (15) controls the input level of this channel.4. CHANNEL 3: The GAIN (8), HIGH (9), MID (10), and LOW (11)controls allow you to fully adjust the selected source. Switch # (16)allows you to select the PHONO 3/LINE 5 (55) or the LINE 6 (54) input.The CHANNEL SLIDE (17) controls the input level of this channel.5. CHANNEL 4: The GAIN (8), HIGH (9), MID (10), and LOW (11)controls allow you to fully adjust the selected source. Switch # (18)allows you to select the LINE 7 (52), LINE 8 (51) or the MIC 3 (53)input. The CHANNEL SLIDE (19) controls the input level of thischannel.NONONONONOTETETETETE: There is Low, Mid and High equalization for eachchannel with an extremely wide range of adjustment.SUGGESTION: You can use the Cut Features on each channel toremove Low, Mid and/or High to create special effects.6. CROSSFADER SECTION: The CROSSFADER (26) allows the mixingof one source into another. The BPM-500 features an assignablecrossfader. The ASSIGN (23, 28) switches allow you to select whichchannel will play through each side of the crossfader. The ASSIGN (23)switch has 4 settings (1, 2, 3 or 4) and allows you to select channel 1, 2,3 or 4 to play through the left side of the crossfader. The ASSIGN (28)switch has 4 settings (1, 2, 3 or 4) and allows you to select channel 1, 2,3 or 4 to play through the right side of the crossfader. There are two OFF(22, 30) buttons for the crossfader. When the OFF (22) button ispressed, the left side of the crossfader will be inactive and the OFFLED (21) will light. When the OFF (30) button is pressed, the right sideof the crossfader will be inactive and the OFF LED (29) will light. Usingthe OFF button, be sure to deactivate the crossfader before changingthe ASSIGN setting. This will avoid any click or popping sound in yoursignal while you are changing the assign setting. The CROSSFADER(26) in your unit is removable and if the need arises can be easilyreplaced. Crossfader units are available in three varieties. Part # RF-45(which is identical to the crossfader supplied with the mixer) has a 45mm travel from side to side. Part # RF-30 is available with a 30 mmtravel distance. Also available is the PSF-45 with a special curvedesigned for scratch mixing. Just purchase one of these crossfaderunits from your 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.Page 57. BPM DISPLAY: There are BPM DISPLAYS (24, 27) for the twochannels assigned to each side of the CROSSFADER (26). Theyupdate approximately every beat and digitally display the Beats PerMinute allowing you to match the beats visually. BPM DISPLAY (24)reflects the Beats Per Minute of the channel assigned to the left side ofthe CROSSFADER, and BPM DISPLAY (27) reflects the Beats PerMinute of the channel assigned to the right side of the CROSSFADER.NONONONONOTETETETETE: A - - reading will appear on the BPM DISPLAY if thetrack has unclear beats. The - - reading will also appear ifthere is no signal present.8. The BEAT OFFSET INDICATORS (25) light when the tracks of the twochannels assigned to the crossfader are within 11 BPMs of each otherand display how aligned the beats of the two channels are. When theRED LEDs light, the beats are not aligned. When the YELLOW LEDslight, the beats are almost aligned. When the GREEN LED lights, thebeats are aligned perfectly.NONONONONOTETETETETE: If the diffence between the two channels beatsexceed 11 BPM, the BEAT OFFSET INDICATORS will notlight.SUGGESTION: You can use the BPM DISPLAYS to determine whichtracks have similar or the same Beats Per Minute. When mixing two trackswith similar Beats Per Minute, you can use one sources pitch control toalign the Beats Per Minute with the other sources BPM. The BPMDISPLAYS and the BEAT OFFSET INDICATORS update every beat andwill reflect the change in BPM and indicate when the beats are aligned.NONONONONOTETETETETE: Beat mixing is a skill that requires practice. Notevery track has a strong beat, and beat mixing works bestwith tracks with clear and strong beats.9. LOOP SECTION: Removing the jumpers from the LOOP OUTPUT (49)and LOOP INPUT (50) jacks will activate the loop. Any deviceconnected between the LOOP OUTPUT (49) and LOOP INPUT (50)jacks will be inserted into the signal path.10.OUTPUT CONTROL SECTION: The level of the MAIN OUT (45, 46) iscontrolled by the MASTER (35) slide. Activating the MONO (33) button(the mono LED will light) makes the overall output mono. The BOOTH(36) control adjusts the level of the BOOTH OUTPUT (47). HINT: Thebooth output is used by some DJs to run monitor speakers in their DJbooth. You can also use it as a second ZONE or AMP output.NONONONONOTETETETETE: The RECORD OUT (48) RECORD OUT (48) RECORD OUT (48) RECORD OUT (48) RECORD OUT (48) has no level control. The levelis set by the channel slides and the gain controls of theselected channel. The tonal qualities are set by the low, midand high controls of that same channel.11. 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 SWITCH (7) controls MIC 1 and MIC2 and has three settings. When the MIC/TALKOVER SWITCH (7) is inthe bottom position, MIC 1 and MIC 2 and talkover are off. When theMIC/TALKOVER SWITCH (7) is in the center position MIC 1 and MIC 2are on, the MIC INDICATOR (6) will glow, but talkover is off. When theMIC/TALKOVER SWITCH (7) is in the top position, MIC 1 and MIC 2and talkover will be on and the volume of all sources except the MIC 1and MIC 2 inputs are lowered by 16 dB. The TREBLE (2) and BASS(3) controls allow you to fully adjust the tone of MIC 1 and MIC 2. MIC1 LEVEL (5) controls the level of MIC 1. The MIC 2 LEVEL (4) controlsthe level of MIC 2.12.CUE SECTION: By connecting a set of headphones to theHEADPHONE (43) jack, you can monitor any or all of the channels.Press the CUE ASSIGN (20) buttons for channels 1 - 4 to select thechannel or channels to be monitored and their respective LEDindicators will glow. Use the CUE LEVEL (40) control to adjust the cuevolume without effecting the overall mix. By moving the CUE PGM PAN(42) control to the left you will be able to monitor the assigned cuesignal. Moving the control to the right will monitor the PGM (program)output. Use the CUE SPLIT (41) button to split the signals from cueand program so that cue will be heard in one earphone and programwill be heard in the other earphone.13.DISPLAY: The peak hold, dual function DISPLAY (31) indicates eitherthe MASTER (45, 46) output left and right levels OR the the selectedcue and program (premaster output) levels. You can choose the optionyou want by pressing the DISPLAY (32) button.NONONONONOTETETETETE: When the DISPLADISPLADISPLADISPLADISPLAY (31)Y (31)Y (31)Y (31)Y (31) is in the cue/program mode,by adjusting GAIN (8)GAIN (8)GAIN (8)GAIN (8)GAIN (8), you can increase or decrease thesignal to match the other channels signal.SpecificationsINPUTS:DJ Mic.1.5mV 2Kohm balancedPhono.3mV 47KohmLine.150 mV 27KohmOUTPUTS:Amp/Booth.0 dB 1V 400ohm Max.20V Peak to PeakRec.225mV 5KohmMIC 1 & MIC 2:DJ Mic.1.5mV 2Kohm balancedBass. 12dBHigh. 12dBMIC 3:DJ Mic.1.5mV 2Kohm balancedControls.Channel 4GENERAL:Bass (Chnls 1-4).+ 12dB/- 32 dBMid (Chnls 1-4).+ 12dB/- 32 dBTreble (Chnls 1-4).+ 12dB/- 32 dBGain (Chnls 1-4).0 to -20dBFrequency Response.20Hz - 20KHz +/- 2dBDistortion.0.02%S/N Ratio.better than 80dBTalkover Attenuation.-16dBHeadphone Impedance.16ohmPower Source.115/230V 50/60Hz 20WDimensions.19”w x 4”h x 9”dWeight.10.2 lbsPage 6DescriptionPart #Cabinet Parts and Packing1234567891011121314151617181920212223242526272829303132333435363738394041424344Item #Parts Lists002-199021-760021-335A021-991022-360022-305023-674047-474047-468002-531002-532002-713002-714003-131148-236148-238148-239003-372003-989A003-970003-370003-969003-711049-206146-710003-993159-201159-167159-171159-216046-024003-612190-062102-025121-003111-051A111-046A111-044A110-153A111-043A107-015111-049A131-081102-007PANEL CONTROLBRACKET VRCOVER BOTTOMPANEL REARHOLDER X-FADERPROTECTOR PLATE FOR 115/230V SWITCHSWING LEVEL (LONG)PCB SPACER SUPPORTPCB SPACER SUPPORTKNOB PUSH (SMALL)BUSHING FOR KNOB (SMALL)KNOB SLIDE (BIG)KNOB SLIDE (SMALL)KNOB ROTARY (B)KNOB INLAY (BLACK); BALANCE,MASTER,MIC,CUE,BOOTHKNOB INLAY (RED); GAINKNOB INLAY (GRAY); TREBLE,BASS,LOW,MID,HIGHPLATE DISPLAY (SMALL)HOLDER LEDVR INLAYPLATE LEDHOLDER LED 3fLED (17mm)HOLDER LED 3f (7mm)PAD FOOTGND SCREWHOLDER BUSHING LEDBNC DUST PROOF CLOTHVR DUST PROOF CLOTH (SMALL)VR DUST PROOF CLOTHSWING DUST PROOF CLOTHSCREENSNAP RIVETDRYERPAN-HEAD MACHINE SCREW; PMS 2.6X4(B)BAND-HEAD TAPPING SCREW /TW-E; BTB-3/TW-3 3X6(AB)BAND-HEAD TAPPING SCREW; BTS-3 3X5(AB)BAND-HEAD TAPPING SCREW; BTS-3 3X6(AB)BAND-HEAD TAPPING SCREW; BTS-3 3X10(AB)PAN-HEAD TAPPING SCREW/TWIN SCREW; PTS-2 3X8(AB) TWINFLAT-HEAD TAPPING SCREW; FTS-3 3X6(AB)BAND-HEAD MACHINE SCREW; BMS 3X2X4FLAT-HEAD TAPPING SCREW; FTS-3 3X12(AB)NUT/WASHERPAN-HEAD MACHINE SCREW; PMS 2X4(B)162-940262-019262-022262-020262-021262-023162-955162-979162-980PRINTED CIRCUIT BOARD PS-900-1; IN/OUTPRINTED CIRCUIT BOARD BPM500-2; MAINPRINTED CIRCUIT BOARD BPM500-3; MASTER VRPRINTED CIRCUIT BOARD BPM500-4; FADERPRINTED CIRCUIT BOARD BPM500-5; DJ MICPRINTED CIRCUIT BOARD BPM500-6; PHONESPRINTED CIRCUIT BOARD PS-900-8; PHONO/LINEPRINTED CIRCUIT BOARD BPM250-7; BIT AMPPRINTED CIRCUIT BOARD BPM250-8; BIT DISPLAY (CEM-1 41166mm)DescriptionPart #Printed Circuit BoardsItem #123456789Page 7Parts Lists - PCB1 Input/Output079-027079-003081-027081-004092-078092-113RECTIFIER DIODE 1N4002 (1N4003,1N4004)SILICON DIODE 1N4148SLIDE SWITCH 2P2C PH/LINESLIDE SWITCH 2P2CPHONE JACK 6.3PHONE JACK XLRD3-7D1, D2SW1EXT1, EXT2J1, J5J9, J10DesignatorsDescriptionPart #Electrical PartsItem #123456076-095076-104TRANSISTOR 2SC2878TRANSISTOR 2SA1048 (2SA1317)Q1-5, Q7Q6DesignatorsDescriptionPart #TransistorsItem #12074-113074-145074-107074-074INTEGRATED CIRCUIT NJM4556LINTEGRATED CIRCUIT NJM2068LDINTEGRATED CIRCUIT NJM7812FAINTEGRATED CIRCUIT NJM7805FAIC8IC1-6IC7IC10DesignatorsDescriptionPart #ICsItem #1234Parts Lists - PCB2 Phono080-091092-078083-069083-097072-091072-092071-084071-136LIGHT EMITTING DIODE (RED) 3.15PHONE JACK 6.3PUSH SWITCH 2P2C L=12.5SWITCH 4P2C L=12.5SLIDE VR 45mm L=20 CH VOL MASTER 10KA2SLIDE